CN114448460B

CN114448460B - Radio frequency system, equipment and control method

Info

Publication number: CN114448460B
Application number: CN202011111906.2A
Authority: CN
Inventors: 黄菲; 车翔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2023-03-24
Anticipated expiration: 2040-10-16
Also published as: CN114448460A

Abstract

The application provides a radio frequency system, a device and a control method, which are used for realizing the transmission of signals of different frequency bands. The radio frequency system includes: a first transmission circuit, a second transmission circuit and a control circuit; the first transmission circuit comprises a first frequency mixer, a first power amplification unit and a first transceiving circuit which are sequentially connected, and a second input end of the first frequency mixer is connected with the first phase-locked loop; the second transmission circuit comprises a second frequency mixer, a second power amplification unit and a second transceiving circuit which are sequentially connected, and a second input end of the second frequency mixer is connected with a second phase-locked loop; and the control circuit is used for controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal and supplying the first analog signal to the first mixer and controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal and supplying the second analog signal to the second mixer when the first signal input by the input end of the first transmission circuit and the second signal input by the input end of the second transmission circuit are signals with different frequency bands.

Description

Radio frequency system, equipment and control method

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a radio frequency system, a device, and a control method.

Background

Currently, a radio frequency system usually includes two transmission circuits and a phase-locked loop, and both transmission circuits are connected to the phase-locked loop, such as the radio frequency circuit shown in fig. 1, and the phase-locked loops are respectively connected to the mixer 1 in the first transmission circuit and the mixer 2 in the second transmission circuit. The phase locked loop may provide both mixer 1 and mixer 2 with analog signals.

If a first signal input to a first transmission circuit and a second signal input to a second transmission circuit in a radio frequency system are both signals of the same frequency band (such as a first frequency band), a phase-locked loop provides an analog signal 1 corresponding to the signal of the first frequency band to a mixer 1 and a mixer 2 respectively, the mixer 1 performs frequency mixing processing on the first signal based on the analog signal 1, the mixer 2 can also perform frequency mixing processing on the second signal based on the analog signal 1, and the radio frequency system can realize simultaneous transmission of two paths of signals of the same frequency band.

If the first signal input to the first transmission circuit and the second signal input to the second transmission circuit in the radio frequency system are signals of different frequency bands, it is assumed that the first signal input to the first transmission circuit in the radio frequency system is a signal of the first frequency band, and the second signal input to the second transmission circuit is a signal of the second frequency band. Since the phase locked loop can only provide one analog signal (the analog signal 1 corresponding to the first frequency band signal or the analog signal 2 corresponding to the second frequency band signal), if the phase locked loop provides the analog signal 1 for the mixer 1 and the mixer 2 at the same time, the mixer 1 in the first transmission circuit can perform mixing processing on the first signal based on the analog signal 1, so that the radio frequency system can transmit the first frequency band signal. The mixer 2 in the second transmission circuit needs to perform mixing processing on the second signal based on the analog signal 2 to realize transmission of the second frequency band signal. Since the analog signal received by the mixer 2 is the analog signal 1 rather than the analog signal 2, the second signal cannot be mixed, and the rf system cannot transmit the second frequency band signal, so that the rf system cannot transmit signals of different frequency bands at the same time.

Disclosure of Invention

The application provides a radio frequency system, a device and a control method, which are used for realizing the transmission of signals of different frequency bands.

In a first aspect, an embodiment of the present application provides a radio frequency system, which includes a first transmission circuit, a second transmission circuit, and a control circuit. The first transmission circuit comprises a first mixer, a first power amplification unit and a first transceiver circuit which are sequentially connected, a first input end of the first mixer is connected with an input end of the first transmission circuit, and a second input end of the first mixer is connected with a first phase-locked loop. The second transmission circuit comprises a second frequency mixer, a second power amplification unit and a second transceiver circuit which are sequentially connected, a first input end of the second frequency mixer is connected with an input end of the second transmission circuit, and a second input end of the second frequency mixer is connected with a second phase-locked loop. The control circuit is used for controlling the first phase-locked loop to generate a first analog signal to be supplied to the first frequency mixer according to the frequency band of the first signal when the first signal input by the input end of the first transmission circuit and the second signal input by the input end of the second transmission circuit are signals of different frequency bands, and controlling the second phase-locked loop to generate a second analog signal to be supplied to the second frequency mixer according to the frequency band of the second signal.

By adopting the system structure, when the first signal and the second signal input to the radio frequency system are signals of different frequency bands, the control circuit generates a first analog signal by controlling the first phase-locked loop and generates a second analog signal by controlling the second phase-locked loop, so that the second frequency mixer can perform frequency mixing processing on the second signal based on the second analog signal provided by the second phase-locked loop, and simultaneously, the first frequency mixer can perform frequency mixing processing on the first signal based on the first analog signal provided by the first phase-locked loop, the radio frequency system realizes corresponding frequency mixing processing on the signals of different frequency bands, and the signals subjected to frequency mixing processing by each frequency mixer are respectively sent through the power amplification unit and the transceiving circuit in each transmission circuit.

In one possible design, the control circuit is further configured to: and when the first signal and the second signal are signals of the same frequency band, controlling one phase-locked loop of the first phase-locked loop and the second phase-locked loop to be in a working state, and controlling the other phase-locked loop to be in a non-working state. And controlling the phase-locked loop in the working state to generate third analog signals according to the same frequency band, and respectively providing the third analog signals to the first frequency mixer and the second frequency mixer.

With the above system structure, when the first signal and the second signal input to the radio frequency system are signals of the same frequency band, the control circuit may control one of the two phase-locked loops to provide the third analog signal for the first mixer and the second mixer. The first frequency mixer and the second frequency mixer can respectively perform frequency mixing processing on the first signal and the second signal based on a third analog signal provided by the first phase-locked loop, the radio frequency system can simultaneously perform corresponding frequency mixing processing on the same frequency band signal, and the signals subjected to frequency mixing processing by the frequency mixers are respectively transmitted through the power amplification units and the transceiving circuits in the transmission circuits. The radio frequency circuit may serve a multiple-input multiple-output scenario. The control circuit can also control a phase-locked loop to be in a non-working state, so that the power consumption of the radio frequency system when the radio frequency system sends signals in the same frequency band is reduced.

In one possible design, the control circuit includes a controller and a first switch. The first end of the first switch is respectively connected with the second input end of the first frequency mixer and the first phase-locked loop, and the second end of the first switch is respectively connected with the second input end of the second frequency mixer and the second phase-locked loop. The controller is configured to control the first switch to be in an off state when the first signal and the second signal are signals of different frequency bands, control the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, and input the first analog signal to the first mixer; controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal, and inputting the second analog signal into the second mixer; and when the first signal and the second signal are signals of the same frequency band, controlling the first switch to be in a conducting state, controlling the phase-locked loop in a working state to generate a third analog signal according to the same frequency band, and enabling the third analog signal to be respectively supplied to the frequency mixers connected with the phase-locked loop in a non-working state through the first switch.

By adopting the system structure, the controller in the control circuit switches the analog signal input to the second mixer by adjusting the on-off state of the first switch. If the first signal and the second signal input to the radio frequency system are different frequency band signals, the first switch is controlled to be switched off, so that the first analog signal generated by the first phase-locked loop is input into the first frequency mixer, and the second analog signal generated by the second phase-locked loop is input into the second frequency mixer, and the radio frequency system is guaranteed to perform corresponding frequency mixing processing on the different frequency band signals. If the first signal and the second signal input to the radio frequency system are the same frequency band signals, the first switch is controlled to be closed, so that the third analog signal generated by the phase-locked loop in the working state is respectively input into the first frequency mixer and the second frequency mixer, and when the radio frequency system sends the same frequency band signals, one phase-locked loop in the two phase-locked loops is in the working state to provide the analog signals for the first frequency mixer and the second frequency mixer, and the other phase-locked loop can be in the non-working state, such as the working stop state, so that the power consumption of the radio frequency system is reduced.

In a possible design, the operating phase-locked loop is the first phase-locked loop, and the control circuit further includes a second switch. And the first end of the second switch is connected with the second phase-locked loop, and the second end of the second switch is respectively connected with the second input end of the second mixer and the second end of the first switch. The controller is specifically configured to control the second switch to be in a conducting state when the first signal and the second signal are signals of different frequency bands; and when the first signal and the second signal are signals of the same frequency band, controlling the second switch to be in an off state.

By adopting the system structure, the controller in the control circuit realizes the adjustment of the analog signal input into the second frequency mixer by switching the on-off state of the first switch and the second switch. When the second switch is in a conducting state, a second analog signal generated by the second phase-locked loop can be input to the second mixer through the second switch. When the second switch is in the off state, the second analog signal generated by the second phase-locked loop cannot be provided for the first frequency mixer or the second frequency mixer, and the second phase-locked loop is not required to be closed to enable the second phase-locked loop to be in the non-working state, so that the stabilization time required by the second phase-locked loop for switching between the non-working state and the working state is avoided, and the waiting time for switching the radio frequency system from sending signals in different frequency bands to sending signals in the same frequency band is reduced.

In one possible design, the second transmission circuit further includes a third switch, a third power amplification unit, and a third transceiver circuit, where the third power amplification unit is connected to the third transceiver circuit. The third switch is a single-pole double-throw switch, a fixed end of the third switch is connected with an output end of the second mixer, a first contact end of the third switch is connected with the second power amplification unit, and a second contact end of the third switch is connected with the third power amplification unit. The control circuit is further configured to control a fixed end of the third switch and the first contact end to be in a conducting state when the first signal and the second signal are signals of different frequency bands, so that a signal output by the second mixer is provided to the second power amplifying unit; and when the first signal and the second signal are signals of the same frequency band, controlling the fixed end of the third switch and the second contact end to be in a conducting state, so that the signal output by the second mixer is provided for the third power amplification unit.

By adopting the system structure, the control circuit can adjust the on-off state of the fixed end of the third switch and each contact end, and when the second signal and the first signal are in the same frequency band. The signal output by the second mixer can be sent through the second power amplification unit and the second transceiver circuit, when the second signal and the first signal are in different frequency bands, the signal output by the second mixer can be sent through the third power amplification unit and the third transceiver circuit, so that the working states of the second power amplification unit and the second transceiver circuit are kept to be the working states corresponding to the same frequency band, the working state of the second transceiver circuit of the second power amplification unit does not need to be switched, the waiting time for the stable time generated by switching the working states of the power amplification units is avoided, the processing time for sending signals in different frequency bands by the radio frequency system is shortened, and the processing time for switching the condition for sending signals in different frequency bands by the radio frequency system to the condition for sending signals in the same frequency band is shortened.

In one possible design, the control circuit includes a fourth switch, a fifth switch, a sixth switch, a third mixer, and a controller. The first end of the fourth switch is connected with the input end of the second transmission circuit and the first end of the fifth switch respectively, the second end of the fourth switch is connected with the first input end of the third mixer, the second end of the fifth switch is connected with the first input end of the second mixer, and the second input end of the third mixer is connected with the first phase-locked loop and the first mixer respectively. The sixth switch is a single-pole double-throw switch, a fixed end of the sixth switch is connected with the second power amplification unit, a first contact end of the sixth switch is connected with an output end of the third mixer, and a second contact end of the sixth switch is connected with an output end of the second mixer. The controller is specifically configured to control the fourth switch to be in an off state, control the fifth switch to be in an on state, control a fixed end of the sixth switch and a second contact end of the sixth switch to be in an on state when the first signal and the second signal are signals of different frequency bands, and enable the signal output by the second mixer to be provided to the second power amplifying unit. And when the first signal and the second signal are signals of the same frequency band, controlling the fourth switch to be in a conducting state, controlling the fifth switch to be in a disconnecting state, and controlling a fixed end of the sixth switch and a first contact end of the sixth switch to be in a conducting state, so that the signal output by the third mixer is provided for the second power amplification unit.

With the above system configuration, the control circuit can adjust the on/off states of the fourth switch and the fifth switch to switch the mixer into which the second signal input to the second transmission circuit flows. And if the second signal and the first signal are in the same frequency band, a first mixer and a third mixer which are connected with the first phase-locked loop respectively carry out frequency mixing processing on the first signal and the second signal based on the first analog signal generated by the first phase-locked loop. The control circuit may adjust an on-off state of the sixth switch, so that the signal obtained by mixing the second signal flows into the second power amplifying unit for amplification, and is transmitted through the second transceiver circuit. And if the second signal and the first signal are in different frequency bands, the second frequency mixer carries out frequency mixing processing on the second signal based on a second analog signal generated by a second phase-locked loop. The second phase-locked loop is kept in the working state of generating the second analog signal, the working state of the second phase-locked loop does not need to be switched, the stability time of the second phase-locked loop caused by the switching of the working state is avoided, and the processing time of the radio frequency system for sending signals of different frequency bands is shortened.

In a possible design, the second transmission circuit further includes a seventh switch, an eighth switch, a fourth mixer, a fourth power amplification unit, and a fourth transceiver circuit, where the fourth power amplification unit is connected to the fourth transceiver circuit. A first end of the seventh switch is connected to the input end of the second transmission circuit and a first end of the eighth switch, a second end of the seventh switch is connected to the first input end of the fourth mixer, a second end of the eighth switch is connected to the first input end of the second mixer, a second input end of the fourth mixer is connected to the first phase-locked loop and the first mixer, and an output end of the fourth mixer is connected to the fourth power amplifying unit. The control circuit is further configured to control the seventh switch to be in an off state and control the eighth switch to be in an on state when the first signal and the second signal are signals of different frequency bands, so that the second signal is input to the second mixer through the eighth switch; and when the first signal and the second signal are signals of the same frequency band, controlling the seventh switch to be in a conducting state, and controlling the eighth switch to be in a disconnecting state, so that the second signal is input to the fourth mixer through the seventh switch.

With the above system configuration, the control circuit may adjust the on/off states of the seventh switch and the eighth switch to switch the mixer into which the second signal input to the second transmission circuit flows. And if the second signal and the first signal are in the same frequency band, the third mixer performs frequency mixing processing on the second signal based on the first analog signal generated by the first phase-locked loop, inputs the second signal to the fourth power amplification unit, amplifies the signal by the fourth amplification unit, and transmits the amplified signal through the fourth transceiver circuit. And if the second signal and the first signal are in different frequency bands, the second frequency mixer carries out frequency mixing processing on the second signal based on a second analog signal generated by a second phase-locked loop and inputs the second signal to the second power amplification unit. The second power amplification unit amplifies the signal and transmits the signal through the second transceiver circuit. The working state of the second power amplification unit is not changed under the condition that the radio frequency system sends signals of different frequency bands and the same frequency band, the waiting for the stabilization time generated by the working state of the power amplification unit is avoided, and the processing time for sending the signals of different frequency bands by the radio frequency system is shortened.

In one possible design, the control circuit is further configured to control the second power amplifying unit to be in a working state of amplifying the signal in the same frequency band according to the same frequency band when the first signal and the second signal are signals in different frequency bands; and when the first signal and the second signal are signals of different frequency bands, controlling the second power amplification unit to be in a working state of amplifying the second signal according to the frequency band of the second signal.

By adopting the system structure, the control circuit controls the working state of the second power amplifying unit according to the frequency band of the second signal, the second power amplifying unit is multiplexed by changing the working state of the second power amplifying unit, and the radio frequency system structure is simplified.

In a possible design, the control circuit is specifically configured to control the second phase-locked loop to generate the second analog signal according to the frequency band of the second signal at a first time before the second signal is input to the input end of the second transmission circuit when the first signal and the second signal are signals of different frequency bands, where a second time duration between the first time and the time when the second signal is input to the input end of the second transmission circuit is not less than a stabilization time of the second phase-locked loop.

By adopting the above system structure, in order to shorten the time period for switching the state of transmitting different frequency band signals into the state of transmitting the same frequency band signal in the radio frequency system, the control circuit may switch the second power amplifying unit to the working state corresponding to the frequency band of the second signal before the second signal is input at the input end of the second transmission circuit. For example, the second phase-locked loop generates the second analog signal at a first time, and a second time period between the first time and a time at which the second signal is input to the second transmission circuit input terminal is not less than a settling time of the second phase-locked loop. The control circuit can also control the second phase-locked loop to generate a second analog signal at a first moment before the second signal is input at the input end of the second transmission circuit when the first signal and the second signal are signals of different frequency bands, so that the stabilization time of waiting for the second phase-locked loop is shortened, and the processing time of the radio frequency system for sending the signals of different frequency bands is shortened.

In a possible design, the control circuit is further configured to control the second power amplifying unit to be in an operating state for amplifying the second signal at a second time before the second signal is input to the input end of the second transmission circuit when the first signal and the second signal are signals of different frequency bands, where a first time duration between the second time and a time when the second signal is input to the input end of the second transmission circuit is not less than a stabilization time of the second power amplifying unit.

With the above system structure, if the operating state of the second power amplifying unit is changed, the second power amplifying unit needs a certain time to be stabilized in the changed operating state. In order to shorten the time period for switching the state of transmitting signals in different frequency bands into the state of transmitting signals in the same frequency band in the radio frequency system, the control circuit may switch the second power amplifying unit to the working state corresponding to the frequency band of the second signal before the second signal is input to the input end of the second transmission circuit. For example, the switching is performed at the second time, and the first time length between the second time and the time when the second signal is input to the input terminal of the second transmission circuit is not less than the settling time of the second power amplification unit.

In a possible design, the control circuit is further configured to control the second power amplifying unit to be in a working state of amplifying the signal in the same frequency band according to the same frequency band when the first signal and the second signal are signals in different frequency bands; and when the first signal and the second signal are signals of different frequency bands, controlling the second power amplification unit to be in a working state of amplifying the second signal according to the frequency band of the second signal.

By adopting the system structure, the control circuit controls the working state of the second power amplifying unit according to the frequency band of the second signal, so that the second power amplifying unit is multiplexed by changing the working state of the second power amplifying unit, and the structure of the radio frequency system is simplified.

In one possible design, the second transceiver circuit further includes a single-pole multi-throw switch and a plurality of antennas. The control circuit is further configured to control the single-pole-multi-throw switch to enable the second power amplification unit and a first antenna to be in a conducting state, where the first antenna is any one of a plurality of antennas.

By adopting the system structure, the control circuit controls the second signal to be sent by one antenna in the plurality of antennas through the on-off state of the single-pole multi-throw switch in the second transceiving circuit.

In one possible design, the radio frequency system further includes a modulation and demodulation circuit. The modulation and demodulation circuit is respectively connected with the first transmission circuit and the second transmission circuit and is used for providing a first signal to the first transmission circuit and providing a second signal to the second transmission circuit.

In a second aspect, an embodiment of the present application provides a radio frequency system control method, applied to a radio frequency system, where the radio frequency system includes a first transmission circuit and a second transmission circuit, the first transmission circuit includes a first phase-locked loop, the second transmission circuit includes a second phase-locked loop, and the method includes: if the first signal input into the first transmission circuit and the second signal input into the second transmission circuit are determined to be signals of different frequency bands; controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, so that the first transmission circuit performs frequency mixing processing on the first signal by using the first analog signal; and controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal, so that the second transmission circuit performs frequency mixing processing on the second signal by using the second analog signal.

In one possible design, the method further includes: if the first signal and the second signal are determined to be signals of the same frequency band, controlling any phase-locked loop of the first phase-locked loop and the second phase-locked loop to generate a third analog signal according to the same frequency band; the third analog signal is supplied to the first transmission circuit and the second transmission circuit, the first transmission circuit is caused to perform mixing processing on the first signal using the third analog signal, and the second transmission circuit is caused to perform mixing processing on the second signal using the third analog signal.

In one possible design, the second transmission circuit further includes a second power amplification unit, and the method further includes: if the first signal and the second signal are determined to be signals of the same frequency band, controlling the second power amplification unit to be in a working state of amplifying the signals of the same frequency band according to the same frequency band; and if the first signal and the second signal are determined to be signals of different frequency bands, controlling the second power amplification unit to be in a working state for amplifying the second signal according to the frequency band of the second signal at a first moment before the second signal is input to the input end of the second transmission circuit, wherein a first time length between the first moment and the moment when the second signal is input is not less than the stabilization time of the second power amplification unit.

In one possible design, the controlling the second phase-locked loop to generate a second analog signal according to a frequency band of the second signal includes: and controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal at a second moment before the second signal is input into the input end of the second transmission circuit, wherein a second duration between the second moment and the moment of inputting the second signal is not less than the stabilization time of the second phase-locked loop.

In a third aspect, an embodiment of the present application further provides a communication apparatus including the radio frequency system as provided in the first aspect and any possible design thereof.

For technical effects that can be achieved by the second aspect and the third aspect, please refer to the description of the technical effects that can be achieved by the corresponding design in the first aspect, and repeated description is omitted here.

Drawings

FIG. 1 is a schematic diagram of a prior art RF system;

fig. 2 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a transceiver circuit according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 14 is a flowchart illustrating a radio frequency system control method according to an embodiment of the present application.

Detailed Description

The New Radio (NR) technology is also called a 5G technology, and is a communication technology that can transmit data by millimeter waves. The 5G network can send data directionally to the terminal. Before the base station sends data to the terminal, the channel quality of the terminal needs to be detected. Generally, a terminal sends a Sounding Reference Signal (SRS) to a base station to assist the base station in determining the downlink channel quality of the terminal.

With the increasing demand of transmitting data from a terminal to a base station, such as live data transmission, high definition video transmission, and the like, a 5G network faces the challenges of ensuring unchanged downlink performance, improving uplink performance, and shortening time delay, and an NR Supplemental Uplink (SUL) technology and an NR Carrier Aggregation (CA) technology are proposed.

NR SUL is a technique for improving uplink coverage of a terminal by a complementary low-band uplink. Generally, the frequency band of the uplink supplemented in the NR SUL technology may be a Long Term Evolution (LTE) frequency band, and the supplemented frequency band is generally a frequency band with a lower frequency. Since the frequency bands for data transmission in the 5G technology are relatively high, the loss of signals is relatively large in the transmission process, and the transmission power of the terminal is limited, so that the coverage of an uplink for transmitting signals to the base station by the terminal is limited. The terminal uses the supplemented uplink frequency band to transmit signals, and because the loss in the transmission process is low, the coverage range of the signals transmitted to the base station by the terminal is expanded, and the uplink performance is improved.

Suppose that the base station and the terminal use the n41 frequency band in the 5G NR to transmit data, and the frequency band supplemented in the NR SUL scenario is the n80 frequency band. When the requirement for transmitting data from the terminal to the base station increases, in order to improve the quality of uplink communication service, the terminal may transmit two n80 frequency band signals to the base station through two transmission circuits of the existing radio frequency system (as shown in fig. 1). However, in order to ensure that the base station can determine the channel quality of the terminal in the n41 frequency band, the terminal also needs to transmit an SRS in the n41 frequency band to the base station.

When an SRS of an n41 frequency band is transmitted in an existing radio frequency system, a phase-locked loop provides an analog signal corresponding to the n41 frequency band for a second mixer, and a first mixer cannot perform corresponding frequency mixing processing on an n80 frequency band signal because the analog signal provided by the phase-locked loop is not an analog signal corresponding to the n80 frequency band, so that the n80 frequency band signal cannot be transmitted. It can be seen that, in the existing radio frequency system, a signal in an n41 frequency band cannot be transmitted while a signal in an n80 frequency band is transmitted, and the radio frequency system is interrupted from transmitting the signal in the n80 frequency band, which causes a terminal to delay transmitting the signal in the n80 frequency band to a base station.

NR CA is a technique for increasing a transmission bandwidth by carrier combination. The Primary Component Carrier (PCC) and the Secondary Component Carrier (SCC) serve the same terminal. The cell corresponding to the PCC is a main cell, the cell corresponding to the SCC is an auxiliary cell, and signals of different frequency bands used by different cells transmit data. The secondary cell may provide additional resources for the terminal, such as undertaking data transmission. Before the secondary cell provides resources for the terminal, the channel quality between the secondary cell and the terminal also needs to be determined. The terminal may send an SRS to the secondary cell to assist the secondary cell in determining the channel quality.

It is assumed that the primary cell and the terminal use the n1 frequency band in the 5G NR for data transmission, and the secondary cell and the terminal use the n78 frequency band for data transmission. When the requirement for transmitting data to the main cell by the terminal increases, in order to improve the uplink communication service quality, the terminal may transmit two n1 frequency band signals to the main cell by two transmission circuits of the existing radio frequency system (as shown in fig. 1). If the secondary cell provides additional resources for the terminal, the secondary cell needs to determine the channel quality of the n78 frequency band of the terminal before providing additional resources for the terminal. The secondary cell may determine the channel quality of the n78 frequency band by the receiving terminal transmitting the SRS of the n78 frequency band to the secondary cell.

When the terminal adopts the existing radio frequency system to transmit the SRS of the n78 frequency band, the phase-locked loop provides the analog signal corresponding to the n78 frequency band for the second frequency mixer, and the first frequency mixer cannot perform corresponding frequency mixing processing on the n1 frequency band signal because the analog signal provided by the phase-locked loop is not the analog signal corresponding to the n1 frequency band, so that the signal of the n1 frequency band cannot be transmitted. It can be seen that, in the existing radio frequency system, a signal in the n78 frequency band cannot be transmitted while a signal in the n1 frequency band is transmitted, and the radio frequency system is interrupted from transmitting the signal in the n1 frequency band, which causes a terminal to delay transmitting the signal in the n1 frequency band to the main cell.

In view of this, an embodiment of the present invention provides a radio frequency system, which is used for enabling a signal transceiver to simultaneously transmit signals in different frequency bands. The radio frequency system, the device and the control method provided by the embodiment of the application can also be applied to an NR SUL scene and an NR CA scene, and when the radio frequency system can send SRS to a base station or a secondary cell, the radio frequency system can also send uplink signals to the base station or a primary cell.

In the embodiment of the present application, "or" describes an association relationship of associated objects, and indicates that two relationships may exist, for example, a or B may indicate: a alone, B alone, where A, B may be singular or plural.

The term "connection" referred to in this application, describing a connection relationship of two objects, may mean two connection relationships, for example, a and B connection, may mean: a is directly connected with B, and A is connected with B through C.

In the present application embodiments, "exemplary," "in some embodiments," "in another embodiment," and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word exemplary is intended to present concepts in a concrete fashion.

An "antenna" in embodiments of the present application may include any suitable configuration, structure and/or arrangement of one or more antenna elements, components, units, assemblies and/or arrays. In some examples, the antenna may implement transmit and receive functions using separate transmit and receive antenna elements.

A "power amplification unit" in embodiments of the present application may include any suitable configuration, structure, and/or arrangement of one or more power amplifiers, components, units, assemblies.

In embodiments of the present application, a "transceiver circuit" may include one or more antennas. In some examples, the transceiver circuitry may implement transmit and receive functions separately. The transceiver circuitry may include suitable configurations for implementing transmit functions, such as digital signal processing, digital-to-analog converters, baseband filters, radio Frequency (RF) modulators, filters, RF splitters, switches, and so forth. The transceiver circuitry may also include a combiner, demodulator, baseband filter, analog-to-digital converter, etc. in any suitable configuration to perform the receive function.

In the embodiment of the present application, the "frequency band" may be a frequency band divided in the existing IEEE802.11 standard, and/or a frequency band divided in a future version thereof. For example, a "band" may be a band divided by an existing cellular specification and/or protocol (e.g., the LTE protocol, 3rd generation partnership project (3 gpp)), a band divided by a future version of a cellular specification and/or protocol, a band divided by a wireless fidelity (WiFi) protocol in a wireless local area network, or a band divided by a bluetooth protocol.

It should be noted that the terms "first," "second," and the like in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or order. The terms equal to or greater than or equal to in the embodiments of the present application may be used with greater than or equal to, and are applicable to the technical solutions adopted when greater than or equal to, and may also be used with less than or equal to, and are applicable to the technical solutions adopted when less than or equal to, it should be noted that when equal to or greater than or equal to, it is not used with less than; when the ratio is equal to or less than the combined ratio, the ratio is not greater than the combined ratio.

The radio frequency system provided by the embodiment of the application can be integrated in a communication device, such as a signal transceiver device, and can also be integrated in a processor or a chip of the signal transceiver device. The signal transceiver may be a terminal or a base station. In one example, when the signal transceiver device is a base station, the base station may synchronously transmit signals of different frequency bands, for example, signals of different frequency bands of a plurality of terminals with different frequency bands for downlink to the terminal.

In another example, when the signal transceiver device is a terminal, the terminal may communicate with the base station, and the terminal may synchronously transmit signals of different frequency bands, such as signals of an uplink frequency band and an SRS, to the base station. When the signal transceiver device is a terminal, the terminal may also be used as a relay device to communicate with other terminals, and the different frequency band signals synchronously transmitted by the terminal are signals of a frequency band for transmitting an uplink to the base station, or signals of a frequency band for transmitting a downlink of the terminal to other terminals.

First, a radio frequency system provided in an embodiment of the present application is described. As shown in fig. 2, the radio frequency system may include a first transmission circuit 20, a second transmission circuit 21, and a control circuit. The first transmission circuit 20 includes a first mixer 201, a first power amplification unit 202, and a first transceiver circuit 203, which are connected in this order, a first input terminal 201a of the first mixer 201 is connected to an input terminal 20A of the first transmission circuit 20, and a second input terminal 201b of the first mixer 201 is connected to a first phase-locked loop 204.

The second transmission circuit 21 includes a second mixer 205, a second power amplification unit 206, and a second transceiver circuit 207, which are connected in sequence, a first input end 205a of the second mixer 205 is connected to the input end 21A of the second transmission circuit 21, and a second input end 205b of the second mixer 205 is connected to the second phase-locked loop 208.

The control circuit is configured to, when the first signal input from the input terminal 20A of the first transmission circuit 20 and the second signal input from the input terminal 21A of the second transmission circuit 21 are signals of different frequency bands, control the first phase-locked loop 204 to generate a first analog signal according to the frequency band of the first signal and supply the first analog signal to the first mixer 201, and control the second phase-locked loop 208 to generate a second analog signal according to the frequency band of the second signal and supply the second analog signal to the second mixer 205.

In one possible implementation, the control circuit in the radio frequency system may be connected to the first phase-locked loop 204, the second phase-locked loop 208, the first power amplifying unit 202, the second power amplifying unit 206, the first transceiver circuit 203, the second transceiver circuit 207, and the like. The control circuit can control the working states of the first phase-locked loop 204, the second phase-locked loop 208, the first power amplification unit 202, the second power amplification unit 206, the first transceiver circuit 203 and the second transceiver circuit 207. The control circuit may include a controller, a switch, a mixer, and other components. In one example, the controller may be implemented as one or more processors. The processor may be a baseband processor.

In yet another possible embodiment, the radio frequency system may further include a modulation and demodulation circuit, which is connected to the first transmission circuit 20 and the second transmission circuit 21, and is configured to input the first signal to the input terminal 20A of the first transmission circuit 20 and input the second signal to the input terminal 21A of the second transmission circuit 21.

The modem circuit in the radio frequency system may be connected to the control circuit. In one example, the control circuit may know that the first signal and the second signal are signals of different frequency bands or signals of the same frequency band by modulating a feedback signal sent to the control circuit by the demodulation circuit. In still another example, the control circuit may control the modulation and demodulation circuit to generate the first signal and the second signal, and input the first signal to the first transmission circuit 20 and the second signal to the second transmission circuit 21.

The input terminal of the first power amplifying unit 202 in the first transmission circuit 20 is connected to the input terminal 201c of the first mixer 201, and is configured to receive the signal output by the first mixer 201. The first power amplifier 202 may amplify the signal output from the first mixer 201, and input the amplified signal to the first transceiver circuit 203 connected to the output terminal of the first power amplifier 202. The first transceiver circuit 203 may directly transmit the signal provided by the first power amplifier 202, or may process and transmit the signal provided by the first power amplifier 202 according to a preset signal processing procedure. Illustratively, the first power amplifying unit 202 may include a register, a front-end switch, at least one power amplifier, at least one filter. The first transceiver circuitry 203 may comprise at least one antenna.

An input terminal of the second power amplifying unit 206 in the second transmission circuit 21 is connected to the input terminal 201c of the second mixer 205, and is configured to receive the signal output by the second mixer 205. The second power amplification unit 206 may amplify the signal output by the second mixer 205, and input the amplified signal to the second transceiver circuit 207 connected to the output terminal of the second power amplification unit 206. The second transceiver circuit 207 may directly transmit the signal provided by the second power amplifying unit 206, or may process and transmit the signal provided by the second power amplifying unit 206 according to a preset signal processing procedure. For example, the second power amplifying unit 206 may include a register, a front switch, a plurality of power amplifiers, and at least one filter. The second transceiver circuitry 207 may comprise at least one antenna.

The input and output of the first mixer 201 are denoted as the first input 201a, the second input 201b and the output 201c of the first mixer 201, respectively. The output terminal 201c of the first mixer 201 is connected to the input terminal of the first power amplifying unit 202. The first mixer 201 is configured to perform mixing processing (for example, addition processing or difference processing) on the input signal received by the first input terminal 201a and the analog signal received by the second input terminal 201b, and input the processed signals to the first power amplifying unit 202 through the output terminal 201c.

The input and output of the second mixer 205 are denoted as a first input 205a, a second input 205b and an output 205c of the second mixer 205, respectively. The output terminal 205c of the second mixer 205 is connected to the input terminal of the second power amplifying unit 206. A second input 205b of the second mixer 205 is connected to an output of a second phase locked loop 208. The second mixer 205 is configured to perform mixing processing (for example, addition processing or difference processing) on an input signal received at a first input terminal 205a of the second mixer 205 and an analog signal received at a second input terminal 205b of the second mixer 205, and input the processed signal to the second power amplifying unit 206 through an output terminal 205c.

In a practical application scenario, the first input 201A of the first mixer 201 may be the input 20A of the first transmission circuit 20, and the third input 205a of the second mixer 205 may be the input 21A of the second transmission circuit 21.

In one example, in a scenario of transmitting a 5G signal, since the number of antennas that the terminal can participate in transmitting an SRS signal is larger, the channel quality estimation is more accurate, and the downlink data transmission rate is higher. The first transceiver circuitry 203 or the second transceiver circuitry 207 may also comprise a plurality of antennas. For example, in case that the second transceiver circuit 207 includes a plurality of antennas, the second transceiver circuit 207 may further include a switch, such as a single-pole-multiple-throw switch, a fixed contact of the single-pole-multiple-throw switch may be connected to the output terminal of the second power amplifying unit 206, and contact terminals of the single-pole-multiple-throw switch are respectively connected to the plurality of antennas. The control circuit can realize that the control signal is sent from one of the plurality of antennas by controlling the on-off state of the fixed end of the single-pole multi-throw switch and the plurality of contact ends. In a practical application scenario, the control circuit may control the second transceiver circuit 207 to transmit the SRS from different antennas in turn. The control circuit controls the switch to enable the SRS to be transmitted from different antennas in turn according to the switching method or the control method, which is not specifically limited in this application. For example, an existing round SRS control method or an antenna switching method may be employed.

Fig. 3 shows only an exemplary connection manner of the switch and the plurality of antennas in the second transceiver circuit 207. In practical application scenarios, the multiple antennas and the switch may also be connected by using other connection manners to implement SRS forwarding, which is not listed here. The second transceiver circuitry 207 may also include any suitable configuration, structure, and/or arrangement that enables the radio frequency circuitry to have SRS transmitting or receiving capabilities. Illustratively, the second transceiver circuit 207 further includes a demodulator, a baseband filter, an analog-to-digital converter, and the like. The second transceiver circuitry 207 may also be used to receive signals.

In one example, an antenna in the first transceiver circuit 203 may be used to receive signals, and the first transceiver circuit 203 may further include a demodulator, a baseband filter, an analog-to-digital converter, and other elements.

In one possible embodiment, the frequency band of the first signal input from the modulation Jie Diaodian to the input terminal 20A of the first transmission circuit 20 is the first frequency band, the frequency band of the second signal input from the input terminal 21A of the second transmission circuit 21 is also the first frequency band, and the first signal and the second signal are signals of the same frequency band.

In yet another possible embodiment, the modulation Jie Diaodian is used to input the first signal to the input terminal 20A of the first transmission circuit 20 in a first frequency band, the second signal input to the input terminal 21A of the second transmission circuit 21 in a second frequency band, and the first signal and the second signal are signals in different frequency bands. Illustratively, the first frequency band and the second frequency band may both be 5G NR frequency bands. The first frequency band and the second frequency band may be a frequency band of 5G NR and a frequency band of LTE, respectively.

The control circuit may control the first phase-locked loop 204 to generate an analog signal. For example, the control circuit changes the voltage by adjusting a power supply device that provides a voltage to the input terminal of the first phase-locked loop 204, so as to control the first phase-locked loop 204 to generate analog signals corresponding to signals of different frequency bands. The control circuit may further control the power supply device to stop supplying power to the first phase-locked loop 204, so as to control the first phase-locked loop 204 to stop generating the analog signal. Similarly, the control circuit may also control the second phase locked loop 205 to generate an analog signal.

In one example, the control circuit may control the first phase-locked loop 204 to generate the first analog signal according to a frequency band of the first signal input to the first transmission circuit 20. For example, if the first signal is in the first frequency band, the control circuit controls the analog signal generated by the first phase-locked loop to have a corresponding relationship with the first frequency band. If the first signal is in the second frequency band, the control circuit controls the analog signal generated by the first phase-locked loop 204 to have a corresponding relationship with the second frequency band. The control circuit may control the first phase-locked loop 204 to generate an analog signal corresponding to the frequency band of the first signal according to the frequency band of the first signal. Similarly, the control circuit may control the analog signal of the second phase-locked loop corresponding to the frequency band of the second signal according to the frequency band of the second signal input to the second transmission circuit 21.

In one example, the second power amplifying unit 206 may be a power amplifier module, and includes a plurality of power amplifiers and a switch. The control circuit may switch the second power amplifying unit 206 to be in the working states corresponding to different frequency bands by switching the switch in the second power amplifying unit 206.

If the first signal input from the modem circuit to the input terminal 20A of the first transmission circuit 20 and the second signal input from the input terminal 21A of the second transmission circuit 21 are in the same frequency band, the rf system may transmit two paths of signals in the same frequency band. For convenience of description, a radio frequency system transmitting two signals of the same frequency band is referred to as that the radio frequency system is in a same-frequency-band dual-transmission state. The radio frequency system may be applied in a Multiple Input Multiple Output (MIMO) scenario.

If the first signal input by the modem circuit to the input terminal 20A of the first transmission circuit 20 and the second signal input by the modem circuit to the input terminal 21A of the second transmission circuit 21 are in different frequency bands, the radio frequency system may transmit two different frequency band signals. For convenience of description, the transmission of two signals of different frequency bands by the rf system is referred to as the dual transmission of different frequency bands by the rf system.

The control circuit in the radio frequency system provided by the embodiment of the application can switch the radio frequency system to be in a same-frequency-band dual-transmission state or a different-frequency-band dual-transmission state according to whether the frequency band of the first signal and the frequency band of the second signal provided by the modulation and demodulation circuit are the same frequency band. If the frequency band of the first signal and the frequency band of the second signal are the same frequency band, the control circuit switches the radio frequency system to be in a same-frequency-band dual-transmission state, so that the radio frequency system can transmit two paths of signals with the same frequency band. If the frequency band of the first signal and the frequency band of the second signal are different frequency bands, the control circuit switches the radio frequency system to be in a different frequency band dual-transmission state, so that the radio frequency system transmits two paths of signals with different frequency bands.

When the radio frequency system provided by the embodiment of the application is in the dual-transmission state in different frequency bands, the control circuit controls the first phase-locked loop 204 to generate a first analog signal, and the first analog signal corresponds to the frequency band of the first signal, so that the first mixer 201 can perform correct frequency mixing processing on the first signal. First power amplification section 202 amplifies the signal output from first mixer 201, and first transmission/reception circuit 203 transmits the amplified signal, thereby transmitting the first signal through first transmission line 20.

The control circuit controls the second phase-locked loop 208 to generate a second analog signal corresponding to the frequency band of the first signal, so that the second mixer 205 can perform correct mixing processing on the second signal. The second power amplifier 206 amplifies the signal output from the second mixer 205, and then the second transceiver circuit 207 transmits the amplified signal, thereby transmitting the second signal from the second transmission circuit 21.

When the radio frequency system provided by the embodiment of the application is in the same-frequency-band double-transmission state, the control circuit can control one of the two phase-locked loops to be in a working state and generate an analog signal. The control circuit may also control the other phase locked loop to be in a non-operational state. For example, the phase-locked loop is controlled to stop generating the analog signal, or the analog signal generated by the phase-locked loop is controlled not to be input into any mixer.

For example, the control circuit may control the first phase-locked loop 204 to be in an active state and the second phase-locked loop 208 to be in an inactive state. The control circuit controls the first phase-locked loop 204 to generate an analog signal, such as a third analog signal, corresponding to the frequency band of the first signal.

In one example, when the radio frequency system is in a same-frequency-band dual-transmission state, both the frequency band of the first signal and the frequency band of the second signal are the first frequency band. When the radio frequency system is in a pilot frequency band dual-transmission state, the frequency band of the first signal is a first frequency band, and the frequency band of the second signal is a second frequency band.

In one illustration, the radio frequency system of fig. 2 may be applied in an NR SUL scenario. Taking as an example that when the radio frequency system is in the same-frequency band dual-transmission state, the first signal and the second signal are both signals of n80 frequency bands, and when the radio frequency system is in the different-frequency band dual-transmission state, the first signal is a signal of n80 frequency bands, and the second signal is a signal of n41 frequency bands, the work flow of the radio frequency system is introduced.

When the radio frequency system is in a same-frequency band dual-transmission state, the control circuit controls the first phase-locked loop 204 to be in a working state, and enables the first phase-locked loop 204 to generate a first analog signal corresponding to an n80 frequency band. The first mixer 201 may perform mixing processing on the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted via the first power amplifying unit 202 and the first transceiving circuit 203, so that the first transmission circuit 20 transmits the first signal. The control circuitry may also control the second phase locked loop 208 to be in an operational state and cause the second phase locked loop 208 to generate a first analog signal corresponding to the n80 frequency band. The second mixer 205 may perform frequency mixing processing on the second signal based on the first analog signal provided by the second phase-locked loop 208, and the signal after the frequency mixing processing is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two paths of signals with the same frequency band.

When the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band. The control circuit controls the operating state of the second phase-locked loop 208 to generate the second analog signal corresponding to the n41 frequency band.

When the radio frequency system is in the dual-transmission state of the pilot frequency band, the control circuit may not change the operating state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band. The control circuit controls the second phase-locked loop 208 to generate a second analog signal corresponding to the n41 frequency band. The first mixer 201 may perform mixing processing on the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted via the first power amplifying unit 202 and the first transceiver circuit 203, so that the first transmission circuit 20 completes transmitting the first signal. The second mixer 205 performs frequency mixing processing on the second signal based on the second analog signal provided by the second phase-locked loop 208, and the signal after the frequency mixing processing is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 finishes sending the second signal, and the radio frequency system realizes sending two paths of signals with different frequency bands.

When the radio frequency system is switched from the different-frequency-band dual-transmission state to the same-frequency-band dual-transmission state, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band. The control circuit may control the operating state of the second phase-locked loop 208 to generate the first analog signal corresponding to the n80 frequency band.

In yet another possible implementation, when the radio frequency system is in the same-frequency band dual-transmission state or the different-frequency band dual-transmission state, the control circuit may control the first phase-locked loop 204 to keep outputting the first analog signal corresponding to the n80 frequency band, or does not change the operating state of the first phase-locked loop 204 generating the first analog signal corresponding to the n80 frequency band. When the radio frequency system is in the dual-transmission state of the pilot frequency band, the control circuit controls the second phase-locked loop 208 to be in a working state, and generates a second analog signal corresponding to the n41 frequency band. When the radio frequency system is in the same frequency band dual-transmission state, the control circuit controls the second phase-locked loop 208 to be in the non-working state, for example, controls the second phase-locked loop 208 to stop generating the second analog signal. Specifically, the control circuit may stop supplying power to the second phase-locked loop 208 by controlling the power supply device that supplies the driving voltage to the second phase-locked loop 208, so that the second phase-locked loop 208 stops generating the second analog signal because there is no driving voltage.

For example, when the radio frequency system is in a dual-transmission state in the same frequency band, the control circuit may control the first phase-locked loop 204 to generate a first analog signal corresponding to the n80 frequency band, and provide the first analog signal to the first mixer 201 and the second mixer 205. The first mixer 201 may perform mixing processing on the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted through the first power amplifying unit 202 and the first transceiver circuit 203, so that the first transmission circuit 20 transmits the first signal. The second mixer 205 may perform mixing processing on the second signal based on the first analog signal provided by the first phase-locked loop 201, where the mixed signal is transmitted through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 transmits the second signal, and the radio frequency system transmits two channels of signals with the same frequency band.

When the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band. The control circuit controls the second phase-locked loop 208 to be in an operating state and generates a second analog signal corresponding to the n41 frequency band. The control circuit may also control the first analog signal generated by the first phase locked loop 204 to stop being provided to the second mixer 205.

When the radio frequency system is in a dual-transmission state in a different frequency band, the control circuit may control the first phase-locked loop 204 to generate a first analog signal corresponding to the n80 frequency band. The first mixer 201 may perform mixing processing on the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted through the first power amplifying unit 202 and the first transceiving circuit 203, so that the first transmission circuit 20 transmits the first signal. The control circuit controls the second phase-locked loop 208 to generate a second analog signal corresponding to the n41 frequency band. The control circuit may further control the analog signal generated by the first phase-locked loop 204 to stop being provided to the second mixer 205, the second mixer 205 may perform mixing processing on the second signal based on the second analog signal provided by the second phase-locked loop 208, and the mixed signal is sent via the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system implements sending two channels of signals with different frequency bands.

When the radio frequency system is switched from the different-frequency-band dual-transmission state to the same-frequency-band dual-transmission state, the control circuit may not change the working state of the first phase-locked loop 204, so that the first phase-locked loop 204 continues to generate the first analog signal corresponding to the n80 frequency band. The control circuit controls the second phase locked loop 208 to be in a non-operational state. The control circuit may also control the first analog signal generated by the first phase locked loop 204 to be provided to the second mixer 205. The control circuit controls the second phase-locked loop 208 to be in a non-operational state, for example, controls the second phase-locked loop 208 to stop generating the second analog signal, and specifically, the control circuit may stop supplying power to the second phase-locked loop 208 by controlling the power supply device that supplies the driving voltage to the second phase-locked loop 208, and the second phase-locked loop 208 stops generating the second analog signal because there is no driving voltage.

In another example, when the radio frequency system is in a same-frequency-band dual-transmission state, both the frequency band of the first signal and the frequency band of the second signal are the first frequency band. When the radio frequency system is in a pilot frequency band dual-transmission state, the frequency band of the first signal is a third frequency band, and the frequency band of the second signal is a second frequency band.

When the radio frequency system is in a same-frequency band dual-transmission state, the control circuit controls the first phase-locked loop 204 to be in a working state, and enables the first phase-locked loop 204 to generate a first analog signal corresponding to a first frequency band. The first mixer 201 may perform mixing processing on the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted via the first power amplifying unit 202 and the first transceiving circuit 203, so that the first transmission circuit 20 transmits the first signal. The control circuitry may also control the second phase-locked loop 208 to be in an operational state and cause the second phase-locked loop 208 to generate a first analog signal corresponding to the first frequency band. The second mixer 205 may perform mixing processing on the second signal based on the first analog signal provided by the second phase-locked loop 208, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two paths of signals in the first frequency band.

When the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the control circuit controls the working state of the first phase-locked loop 204 to generate a third analog signal corresponding to a third frequency band. The control circuit controls the operating state of the second phase-locked loop 208 to generate a second analog signal corresponding to the second frequency band.

When the radio frequency system is in the dual-transmission state of the different frequency band, the control circuit may control the first phase-locked loop 204 to generate a third analog signal corresponding to the third frequency band, and control the second phase-locked loop 208 to generate a second analog signal corresponding to the second frequency band. The first mixer 201 may perform mixing processing on the first signal based on the third analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted via the first power amplifying unit 202 and the first transceiver circuit 203, so that the first transmission circuit 20 transmits the first signal. The second mixer 205 performs frequency mixing processing on the second signal based on the second analog signal provided by the second phase-locked loop 208, and the signal after the frequency mixing processing is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes synchronous sending of signals in the second frequency band and the third frequency band.

When the radio frequency system is switched from the dual-transmission state of the different frequency band to the dual-transmission state of the same frequency band, the control circuit controls the working state of the first phase-locked loop 204 to generate a first analog signal corresponding to the first frequency band. The control circuit may control an operating state of the second phase-locked loop 208 to generate a first analog signal corresponding to the first frequency band.

In another possible implementation, when the radio frequency system is in the same-frequency band dual-transmission state, the control circuit controls the second phase-locked loop 208 to be in the non-operating state, for example, controls the second phase-locked loop 208 to stop generating the second analog signal. The control circuit may also control the first phase locked loop 204 to provide the first analog signal to the second mixer 205. The control circuit may control the first phase locked loop 204 to generate a first analog signal corresponding to the first frequency band and provide it to the first mixer 201 and the second mixer 205. The first mixer 201 may perform mixing processing on the first signal based on the first analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted via the first power amplifying unit 202 and the first transceiving circuit 203, so that the first transmission circuit 20 transmits the first signal. The second mixer 205 may perform mixing processing on the second signal based on the first analog signal provided by the first phase-locked loop 201, and the mixed signal is sent through the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system realizes sending two signals with the same frequency band.

When the rf system switches from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the control circuit controls the working state of the first phase-locked loop 204 to generate a third analog signal corresponding to a third frequency band. The control circuit controls the second phase-locked loop 208 to be in a working state and generates a second analog signal corresponding to the second frequency band. The control circuit may also control the third analog signal generated by the first phase locked loop 204 to stop being provided to the second mixer 205.

When the radio frequency system is in the dual-transmission state of the different frequency band, the control circuit may control the first phase-locked loop 204 to generate a third analog signal corresponding to the third frequency band. The first mixer 201 may perform mixing processing on the first signal based on the third analog signal provided by the first phase-locked loop 204, and the mixed signal is transmitted via the first power amplifying unit 202 and the first transceiver circuit 203, so that the first transmission circuit 20 transmits the first signal. The control circuit controls the second phase locked loop 208 to generate a second analog signal corresponding to the second frequency band. The control circuit may further control the analog signal generated by the first phase-locked loop 204 to stop being provided to the second mixer 205, so that the second mixer 205 can perform mixing processing on the second signal based on the second analog signal provided by the second phase-locked loop 208, and the mixed signal is sent via the second power amplifying unit 206 and the second transceiver circuit 207, so that the second transmission circuit 21 sends the second signal, and the radio frequency system implements sending two channels of signals with different frequency bands.

When the radio frequency system is switched from the dual-transmission state of the different frequency band to the dual-transmission state of the same frequency band, the control circuit controls the working state of the first phase-locked loop 204 to generate a first analog signal corresponding to the first frequency band. The control circuit controls the second phase locked loop 208 to be in a non-operational state. The control circuit may also control the first analog signal generated by the first phase locked loop 204 to be provided to the second mixer 205. The control circuit controls the second phase-locked loop 208 to be in a non-operating state, for example, controls the second phase-locked loop 208 to stop generating the second analog signal, and specifically, the control circuit may stop supplying power to the second phase-locked loop 208 by controlling a power supply device that supplies a driving voltage to the second phase-locked loop 208, so that the second phase-locked loop 208 stops generating the second analog signal because there is no driving voltage.

Since the phase locked loop cannot generate an analog signal immediately after power up. The phase-locked loop needs to be stable to generate the analog signal continuously. Therefore, when the control circuit controls the second phase-locked loop 208 to switch from the state in which the generation of the analog signal is stopped to the state in which the second phase-locked loop 208 generates the analog signal, and the second transmission circuit 21 needs to wait for the second phase-locked loop 208 to be stable, the second mixer 205 performs mixing processing on the second signal according to the analog signal generated by the second phase-locked loop. Because the second phase-locked loop needs to be stable, the radio frequency system delays to send the second signal, and the time length of the radio frequency system in the pilot frequency band double-sending state is also increased.

In order to shorten the time length of the radio frequency system in the dual-transmission state of the different frequency bands, the control circuit may control the second phase-locked loop 208 to generate the second analog signal according to the frequency band of the second signal at a first time before the second signal is input to the input end 21A of the second transmission circuit 21 when the first signal and the second signal are signals of different frequency bands, where a second time length between the first time and the time when the second signal is input to the input end 21A of the second transmission circuit 21 is not less than the stabilization time of the second phase-locked loop 208.

Similarly, the operating states of the power amplification units for amplifying signals of different frequency bands are different. After the working state of the power amplification unit is switched, the signal cannot be immediately amplified. The power amplification unit also needs to amplify the signal after stabilization. If the rf system changes from the same-frequency band dual-transmission state to the different-frequency band dual-transmission state, the control circuit also needs to switch the operating state of the second power amplifying unit 206 according to the frequency band of the second signal, and can amplify the signal output by the second mixer 205 after the second power amplifying unit 206 is stabilized. The radio frequency system delays sending the second signal, and the time length of the radio frequency system in the pilot frequency band double-sending state is also increased. Since the second power amplifying unit 206 needs to be stable, the rf system may delay sending the second signal, and the duration of the rf system being in the dual-transmission state of the different frequency band is also increased.

The control circuit may further control the second power amplifying unit 206 to be in the working state of amplifying the second signal at a second time before the second signal is input to the input end 21A of the second transmission circuit 21 when the first signal and the second signal are signals of different frequency bands (the radio frequency system is in the dual-transmission state of different frequency bands), where a first time length between the second time and a time when the second signal is input to the input end 21A of the second transmission circuit 21 is not less than the settling time of the second power amplifying unit 206.

For the sake of convenience, the stabilization time required for the second phase-locked loop 208 to switch from the operating state in which the output of the analog signal is stopped to the operating state in which the analog signal is output is TW1 (typically, more than 100 microseconds), and the stabilization time required for the second power amplifying unit 206 to switch from the operating state corresponding to the first frequency band to the operating state corresponding to the second frequency band is TW2 (typically, more than 200 microseconds).

The control circuit may switch the working states of the second phase-locked loop 208 and/or the second power amplifying unit 206 according to a preset switching manner, so as to shorten the time length of the radio frequency system in the dual-transmission state in the different frequency band, and also shorten the switching time of the radio frequency system from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band.

In one illustration, the radio frequency system is applied in the NR SUL scenario. Taking the example that when the radio frequency system is in the same-frequency band dual-transmission state, the first signal and the second signal are both n80 frequency band signals, and when the radio frequency system is in the different-frequency band dual-transmission state, the first signal is an n80 frequency band signal, and the second signal is an n41 frequency band signal, the control or switching process of the control circuit is described.

Under the condition that the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the control circuit can control the second phase-locked loop 208 to generate a second analog signal at a first time T1. The control circuit may further control the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band at the second time T2. The modulation and demodulation circuit supplies the second signal of the n41 band to the input terminal 21A of the second transmission circuit 21 at the third timing T3.

The first time T1 and the second time T2 are both before the third time T3, a first time Δ T1 between the first time T1 and the third time T3 is not less than a stabilization time TW1 of the second phase-locked loop 208, and a second time Δ T2 between the second time T2 and the third time T3 is not less than a stabilization time TW2 required for the second power amplification unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band. The control circuit controls the first switch 209 to be in the open state before the third time T3.

In practical applications, the settling time for switching the operating state of the second transceiver circuit 207 from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band is short, and the settling time required after the second transceiver circuit 207 switches the operating state is usually less than the settling time TW1 of the second phase-locked loop 208 and the settling time TW2 of the second power amplifying unit 206. The control circuit may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band before the third time T3.

When the radio frequency system is switched from the dual transmission state in the different frequency band to the dual transmission state in the same frequency band, the control circuit may control the second power amplifying unit 206 to switch from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band at a fourth time T4. The modem circuit supplies the second signal of the n80 band to the input terminal 21A of the second transmission circuit 21 at the fifth timing T5. The fourth time T4 is before the fifth time T5, and a third time duration Δ T3 between the fourth time T4 and the fifth time T5 is not less than a stabilization time TW2 required for the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band. The control circuit may control the first analog signal generated by the first phase locked loop 204 to be provided to the second mixer 205 at a fifth time T5.

The settling time for switching the second transceiver circuit 207 from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band is usually short and is less than the settling time TW1 of the second phase-locked loop 208 and the settling time TW2 of the second power amplification unit 206. The control circuit may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band at the fifth time T5.

It should be understood that, controlling the switching timing sequence for switching the operating states of the second phase-locked loop 208 and the second power amplifying unit 206 according to the settling time of the second phase-locked loop 208 and the settling time of the second power amplifying unit 206 can shorten the time length of the radio frequency system in the dual-transmission state of the different frequency band, and shorten the switching time length of the radio frequency system for switching from the dual-transmission state of the different frequency band to the dual-transmission state of the same frequency band. In the implementation process, the control circuit can further set the switching timing of the working states of other elements according to the performance or the stable time of other elements in the radio frequency system.

In a possible implementation manner, the control circuit in the radio frequency system provided in this embodiment of the present application may include a controller and a first switch 209, and fig. 4 shows a schematic connection relationship between the first switch 209 and the first transmission circuit 20 and the second transmission circuit 21. A first terminal of the first switch 209 is connected to the second input terminal 201b of the first mixer 201 and the first phase-locked loop 204, respectively, and a second terminal of the first switch 209 is connected to the second input terminal 205b of the second mixer 205 and the second phase-locked loop 208, respectively. The control circuit may control the first switch 209 to be in a conducting state when the analog signal generated by the first phase-locked loop 204 is provided to the first mixer 201 and the second mixer 205. The controller controls the first switch 209 to be in an open state, which may be a state where the analog signal generated by the first phase locked loop 204 stops being provided to the second mixer 205.

The modem circuit in the radio frequency system may be connected to a controller in the control circuit. In one example, the controller may know that the first signal and the second signal are signals of different frequency bands or signals of the same frequency band by modulating a feedback signal sent to the controller by the demodulation circuit. In still another example, the controller may control the modulation and demodulation circuit to generate the first signal and the second signal, and input the first signal to the first transmission circuit 20 and the second signal to the second transmission circuit 21.

The controller may control the first switch 209 to be in an off state when the first signal and the second signal are signals of different frequency bands (that is, the radio frequency system is in a dual-transmission state of a different frequency band), and control the first phase-locked loop 204 to generate a first analog signal according to the frequency band of the first signal, where the first analog signal generated by the first phase-locked loop 204 may be input to the first mixer 201 through a wire or a transmission line connected to the second input end 201b of the first mixer 201, and the first mixer 201 may perform mixing processing on the first signal based on the first analog signal. Since the first switch 209 is in an open state, which opens the first phase-locked loop 204 and the second mixer 205, the first analog signal generated by the first phase-locked loop 204 cannot be input to the second input terminal 205b of the second mixer 205.

The controller further controls the second phase-locked loop 208 to generate a second analog signal according to the frequency band of the second signal, the second analog signal generated by the second phase-locked loop 208 may be input to the second mixer 205 through a wire or a transmission line connected to the second input terminal 205b of the second mixer 205, and the second mixer 205 may perform mixing processing on the second signal based on the second analog signal. Since the first switch 209 is in an off state, which causes the second phase-locked loop 208 and the first mixer 201 to be disconnected from each other, the second analog signal generated by the second phase-locked loop 208 cannot be input to the second input terminal 201b of the first mixer 201.

The controller controls the first switch 209 to be in an off state, so that the first mixer 201 can independently perform mixing processing on the first signal according to the first analog signal generated by the first phase-locked loop 204, and also the second mixer 205 can independently perform mixing processing on the second signal according to the second analog signal generated by the second phase-locked loop 208. The signal mixed by the first mixer 201 is transmitted via the first power amplification unit 202 and the first transceiver circuit 203. The signal mixed by the second mixer 205 is transmitted via the second power amplifier 206 and the second transceiver circuit 207. The synchronous transmission of signals of different frequency bands by a radio frequency system is realized.

The controller may further control the first switch 209 to be in a conducting state (or a closed state) when the first signal and the second signal are signals of the same frequency band (that is, the radio frequency system is in a same-frequency-band dual-transmission state), so that the first phase-locked loop 204 is conducted with the second input terminal 205b of the second mixer 205, and the second phase-locked loop 208 is conducted with the second input terminal 201b of the first mixer 201. The controller may select one of the two phase-locked loops to provide an analog third analog signal to the first mixer 201 and the second mixer 205, where the third analog signal has a corresponding relationship with the frequency bands of the first signal and the second signal.

For example, the controller selects the first phase-locked loop 204 from the two phase-locked loops and makes it in an operating state, and controls the first phase-locked loop 204 to generate a third analog signal according to the frequency bands of the first signal and the second signal, and provides the third analog signal to the first mixer 201 and the second mixer 205. The controller controls the second phase locked loop 205 to be in a non-operational state such that the second phase locked loop 205 cannot provide analog signals for the first mixer 201 and the second mixer 205.

The first mixer 201 may perform mixing processing on the first signal according to the third analog signal generated by the first phase-locked loop 204, and the second mixer 205 may perform mixing processing on the second signal according to the third analog signal generated by the first phase-locked loop 204. The signal mixed by the first mixer 201 is transmitted via the first power amplifier 202 and the first transceiver circuit 203. The signals mixed by the second mixer 205 are transmitted through the second power amplifying unit 206 and the second transceiver circuit 207, so that the rf system can synchronously transmit signals in the same frequency band.

For another example, the controller selects the second phase-locked loop 208 from the two phase-locked loops and makes the second phase-locked loop 208 in an operating state, and controls the second phase-locked loop 208 to generate a third analog signal according to the frequency bands of the first signal and the second signal, and provides the third analog signal to the first mixer 201 and the second mixer 205. The controller controls the first phase locked loop 204 to be in a non-operational state such that the first phase locked loop 204 is unable to provide the analog signals for the first mixer 201 and the second mixer 205.

The first mixer 201 may perform a mixing process on the first signal according to the third analog signal generated by the second phase-locked loop 208, and the second mixer 205 may perform a mixing process on the second signal according to the third analog signal generated by the second phase-locked loop 208. The signal mixed by the first mixer 201 is transmitted via the first power amplifier 202 and the first transceiver circuit 203. The signals mixed by the second mixer 205 are transmitted through the second power amplifying unit 206 and the second transceiver circuit 207, so that the rf system can synchronously transmit signals in the same frequency band.

If the radio frequency system is in the same frequency band dual-transmission state, the controller controls one of the first phase-locked loop 204 and the second phase-locked loop 208 to be in the working state, and the other phase-locked loop is in the non-working state, for example, the controller controls the first phase-locked loop 204 to be in the working state and controls the second phase-locked loop 208 to be in the non-working state. When the controller controls the second phase-locked loop 208 to be in the non-operating state, the power supply device for providing the driving voltage for the second phase-locked loop 208 is controlled to stop supplying power to the second phase-locked loop 208, so that the second phase-locked loop 208 stops generating the second analog signal, which can also be understood as turning off the second phase-locked loop 208, and the power consumption of the radio frequency system can be reduced.

In one illustration, the radio frequency system of fig. 3 may be applied in the NR SUL scenario. Taking as an example that when the radio frequency system is in the same-frequency band dual-transmission state, the first signal and the second signal are both signals of n80 frequency bands, and when the radio frequency system is in the different-frequency band dual-transmission state, the first signal is a signal of n80 frequency bands, and the second signal is a signal of n41 frequency bands, the work flow of the radio frequency system is introduced.

When the radio frequency system is in the same frequency band dual-transmission state, the controller controls the first switch 209 to be in the conducting state, so that the first phase-locked loop 204 is conducted with the second input end 205b of the second mixer 205. The controller controls the first phase-locked loop 204 to output the first analog signal, controls the second phase-locked loop 208 to stop generating the second analog signal, or controls the second phase-locked loop 208 to generate the second analog signal without supplying the second analog signal to the second mixer 205. The controller controls the operating state of the first power amplifying unit 202 to be the operating state corresponding to the n80 frequency band, and controls the operating state of the first transceiver circuit 203 to be the operating state corresponding to the n80 frequency band. The controller controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n80 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n80 frequency band.

When the rf system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller controls the first switch 209 to be in the off state, controls the second phase-locked loop 208 to output the second analog signal, or controls the second phase-locked loop 208 to be in the working state, controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n41 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n41 frequency band.

In one example, when the radio frequency system is in the dual-transmission state in the different frequency band, the second analog signal output by the second phase-locked loop 208 serves as a local oscillation source of a signal transmission path formed by the second mixer 205, the second power amplifying unit 206, and the second transceiver circuit 207. The first analog signal output by the first phase locked loop 204 serves as a local oscillation source of a signal transmission path formed by the first mixer 201, the first power amplifying unit 202, and the first transceiver circuit 203.

It should be noted that the controller may not switch the operating states of the first phase-locked loop 204, the first power amplification unit 202, and the first transceiver circuit 203. The first phase-locked loop 204 can keep outputting the first analog signal, the operating state of the first power amplifying unit 202 keeps the operating state corresponding to the n80 frequency band, and the operating state of the first transceiver circuit 203 keeps the operating state corresponding to the n80 frequency band. In the process that the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, so that the situation that the transmission of the first signal is interrupted due to the switching to the different-frequency-band dual-transmission state in the conventional radio frequency system is avoided.

When the radio frequency system is switched from the different-frequency-band dual-transmission state to the same-frequency-band dual-transmission state, the controller controls the second phase-locked loop 208 to stop generating the second analog signal or controls the second phase-locked loop 208 to be in the non-working state, controls the first switch 209 to be in the closed state, controls the working state of the second power amplification unit 206 to be the working state corresponding to the n80 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n80 frequency band.

In an example, when the radio frequency system is in a same-frequency band dual-transmission state, the first analog signal output by the first phase-locked loop 204 serves as a local oscillation source of a signal transmission path formed by the first mixer 201, the first power amplifying unit 202, and the first transceiver circuit 203. The first analog signal output by the first phase-locked loop 204 also serves as a local oscillation source of a signal transmission path formed by the second mixer 205, the second power amplification unit 206, and the second transceiver circuit 207.

In one possible embodiment, the second phase-locked loop 208 needs some settling time TW1 (typically greater than 100 microseconds) from the operating state in which the output of the second analog signal is stopped, and the second power amplification unit 206 needs settling time TW2 (typically greater than 200 microseconds) from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band.

The controller may switch the operating state of the second phase-locked loop 208 and/or the second power amplifying unit 206 according to a preset switching manner, so as to shorten the time length of the radio frequency system in the dual-transmission state in the different frequency band, and also shorten the switching time of the radio frequency system from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band.

Under the condition that the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller may control the second phase-locked loop 208 to generate the second analog signal at a sixth time T6. The controller may further control the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band at a seventh time T7. The modem circuit supplies the second signal of the n41 band to the input terminal 21A of the second transmission circuit 21 at the eighth timing T8.

The sixth time T6 and the seventh time T7 are both before the eighth time T8, and the fourth time Δ T4 between the sixth time T6 and the eighth time T8 is not less than the stabilization time TW1 of the second phase-locked loop 208, and the fifth time Δ T5 between the seventh time T7 and the eighth time T8 is not less than the stabilization time TW2 required for the second power amplification unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band. The controller controls the first switch 209 to be in the off state before the eighth time T8.

In practical applications, the settling time for switching the operating state of the second transceiver circuit 207 from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band is short, and usually the settling time required after the second transceiver circuit 207 switches the operating state is less than the settling time TW1 of the second phase-locked loop 208 and the settling time TW2 of the second power amplifying unit 206. The controller may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band before the eighth time T8.

When the radio frequency system is switched from the dual transmission state in the different frequency band to the dual transmission state in the same frequency band, the controller may control the second power amplifying unit 206 to switch from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band at a ninth time T9. The modem circuit supplies the second signal of the n80 band to the input terminal 21A of the second transmission circuit 21 at the tenth timing T10. Wherein the ninth time T9 is before the tenth time T10, and a sixth time Δ T6 between the ninth time T9 and the tenth time T10 is not less than a stabilization time TW2 required for the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band. The controller may control the first switch 209 to be in the on state before the fifth time.

The settling time for switching the second transceiver circuit 207 from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band is usually short and is less than the settling time TW1 of the second phase-locked loop 208 and the settling time TW2 of the second power amplification unit 206. The controller may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band before the tenth time T10.

It should be understood that, by controlling the switching timing sequence for switching the operating states of the second phase-locked loop 208 and the second power amplifying unit 206 according to the settling time of the second phase-locked loop 208 and the settling time of the second power amplifying unit 206, the time length of the radio frequency system in the dual-transmission state in the different frequency band can be shortened, and the switching time length of the radio frequency system from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band can be shortened. In the implementation process, the controller can further set the switching sequence of the working states of other elements according to the performance or the stable time of other elements in the radio frequency system.

The control circuit in the radio frequency system provided in the embodiment of the present application may further include a second switch 501, and as shown in fig. 5, a schematic connection relationship between the second switch 501 and the first transmission circuit 20 and the second transmission circuit 21 is shown. A first terminal of the second switch 501 is connected to the second phase-locked loop 208, and a second terminal of the second switch 501 is connected to the second input terminal 205b of the second mixer 205 and the second terminal of the first switch 209, respectively.

The controller may control the second switch 501 to be in an off state, so that the analog signal generated by the second phase-locked loop 208 cannot be provided to any mixer, thereby controlling the second phase-locked loop 208 to be in a non-operating state. If the rf system is in the dual-transmission state in the different frequency band, the controller may control the second switch 501 to be in the conducting state, so that the second pll 208 and the second input terminal 205b of the second mixer 205 form a path in front of each other, and the analog signal generated by the second pll 208 may be provided to the second mixer 205. The controller may not control the second phase-locked loop 208 to stop the second analog signal, or close the second phase-locked loop 208, and the second phase-locked loop 208 may keep the working state of generating the second analog signal, and does not switch the working state of the second phase-locked loop 208, and also does not need to wait for the second phase-locked loop 208 to be stable, thereby avoiding the radio frequency system from delaying to transmit the second signal, and shortening the time length of the radio frequency system in the different-frequency-band dual-transmission state.

In one illustration, the radio frequency system of fig. 5 may be applied to the NR SUL scenario. Taking as an example that when the radio frequency system is in the same-frequency band dual-transmission state, the first signal and the second signal are both signals of n80 frequency bands, and when the radio frequency system is in the different-frequency band dual-transmission state, the first signal is a signal of n80 frequency bands, and the second signal is a signal of n41 frequency bands, the work flow of the radio frequency system is introduced.

When the radio frequency system is in the same frequency band dual-transmission state, the controller controls the first switch 209 to be in the on state, and the second switch 501 to be in the off state, so that the first phase-locked loop 204 is connected to the second input end 205b of the second mixer 205. The controller controls the first phase-locked loop 204 to output a first analog signal and controls the second phase-locked loop 208 to output a second analog signal. The controller controls the operating state of the first power amplifying unit 202 to be the operating state corresponding to the n80 frequency band and controls the operating state of the first transceiver circuit 203 to be the operating state corresponding to the n80 frequency band. The controller controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n80 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n80 frequency band.

In a possible embodiment, when the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller controls the first switch 209 to be in the off state, and controls the second switch 501 to be in the on state, so that the second phase-locked loop 208 is connected to the second input end 205b of the second mixer 205. The controller controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n41 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n41 frequency band.

It should be understood that the controller may not switch the operation state or the operation state of the first phase-locked loop 204, the first power amplifying unit 202, and the first transceiving circuit 203. The first phase-locked loop 204 can maintain the operating state of generating the first analog signal, the operating state of the first power amplifying unit 202 maintains the operating state corresponding to the n80 frequency band, and the operating state of the first transceiver circuit 203 maintains the operating state corresponding to the n80 frequency band. In the process that the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, so that the first signal is prevented from being transmitted in the existing radio frequency system due to the switching to the different-frequency-band dual-transmission state.

In yet another possible implementation, when the radio frequency system is switched from the same-frequency band dual transmission state to the different-frequency band dual transmission state, the controller controls the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band at an eleventh time T11. The modulation and demodulation circuit supplies the n 41-band second signal to the input terminal 21A of the second transmission circuit 21 at the twelfth time T12. The eleventh time T11 is before the twelfth time T12, and the seventh time Δ T7 between the eleventh time T11 and the twelfth time T12 is not less than the stabilization time TW2 required for the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band. The controller controls the first switch 209 to be in the off state before the twelfth time T12 and controls the second switch 501 to be in the on state before the twelfth time T12.

Since the settling time for switching the operating state of the second transceiver circuit 207 from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band is short, and the settling time is usually shorter than the settling time TW2 of the second power amplifying unit 206, the controller may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band before the twelfth time T12.

When the rf system is switched from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band, the controller controls the second power amplifying unit 206 to switch from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band at a thirteenth time T13. The modem circuit supplies the second signal of the n80 band to the input terminal 21A of the second transmission circuit 21 at the fourteenth timing T14. Wherein, the thirteenth time T13 is before the fourteenth time T14, and the eighth time Δ T8 between the thirteenth time T13 and the fourteenth time T14 is not less than the stabilization time TW3 required for the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band. The controller controls the first switch 209 to be in the on state before the fourteenth time T14 and controls the second switch 501 to be in the off state before the fourteenth time T14.

The settling time for switching the operating state of the second transceiver circuit 207 from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band is short, and is usually shorter than the settling time TW2 of the second power amplification unit 206. The controller may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band before the fourteenth time T14.

In a practical application scenario, the function of the second switch 501 may also be implemented by a switch circuit. As shown in fig. 6, a switching circuit includes a single pole double throw switch 502 and a ground terminal. The fixed end 502c of the single-pole double-throw switch 502 is connected to the second phase-locked loop 208, the first contact end 502a is connected to the ground, and the second contact end 502b is connected to any node between the first switch 209 and the second mixer 205. A load, such as a resistor, may be connected between the first contact terminal 502a and the ground terminal.

When the controller controls the switch circuit, the controller controls the fixed end 502c and the second contact end 502b of the single-pole double-throw switch to be in the conducting state, which is the same as the effect or contribution of the controller controlling the second switch 501 to be in the conducting state to the radio frequency system in the above embodiment. The controller controls the fixed end 502c of the single-pole double-throw switch and the first contact end 502a to be in a conducting state, which is the same as the effect or contribution of the controller controlling the second switch 501 to be in a disconnected state to the radio frequency system in the above embodiment. The controller controls the fixed end 502c of the single-pole double-throw switch and the first contact end 502a to be in a conducting state, and if the second phase-locked loop 208 is in a working state of generating an analog signal, the analog signal generated by the second phase-locked loop 208 can flow to the ground end through a path formed by the fixed end 502c of the single-pole double-throw switch and the first contact end 502 a.

In yet another possible embodiment, the second signal may be transmitted via a different power amplification unit or transceiver circuit. As shown in fig. 7, the second transmission circuit 20 in the radio frequency system provided in the embodiment of the present application may further include a third switch 601, a third power amplification unit 602, and a third transceiver circuit 603, where the third power amplification unit 602 is connected to the third transceiver circuit 603.

The third switch 601 is a single-pole double-throw switch, a fixed end 601c of the third switch 601 is connected to the output end 205c of the second mixer 205, a first contact end 601a of the third switch 601 is connected to the second power amplifying unit 206, and a second contact end 601b of the third switch 601 is connected to the third power amplifying unit 602.

The control circuit may control the fixed end 601c of the third switch 601 and the first contact end 601a to be in a conducting state when the first signal and the second signal are signals of different frequency bands, so that the signal output by the second mixer 205 is provided to the second power amplifying unit 206. The control circuit may further control the fixed end 601c and the second contact end 601b of the third switch 601 to be in a conducting state when the first signal and the second signal are signals of the same frequency band, so that the signal output by the second mixer 205 is provided to the third power amplifying unit 602.

Illustratively, the third power amplifying unit 602 may include a register, a front-end switch, at least one power amplifier, at least one filter. The third power amplifying unit 602 is connected to a third transceiver circuit 603 including at least one antenna.

In one illustration, the radio frequency system of fig. 7 may be applied in an NR CA scenario. Taking as an example that when the radio frequency system is in the same-frequency band dual-transmission state, the first signal and the second signal are both signals of an n1 frequency band, and when the radio frequency system is in the different-frequency band dual-transmission state, the first signal is a signal of an n1 frequency band, and the second signal is a signal of an n78 frequency band, the work flow of the radio frequency system is introduced.

When the radio frequency system is in the same frequency band dual-transmission state, the controller controls the first switch 209 to be in the closed state, so that the first phase-locked loop 204 and the second input end 205b of the second mixer 205 are conducted. The controller controls the fixed end 601c of the third switch 601 to be conducted with the second contact end 601b, so that the circuit between the output end 205c of the second mixer 205 and the third power amplifying unit 602 is conducted. The controller controls the first phase-locked loop 204 to generate a fourth analog signal corresponding to the n1 frequency band, and controls the second phase-locked loop 208 to stop generating a fifth analog signal corresponding to the n78 frequency band. The controller controls the operating state of the first power amplifying unit 202 to be the operating state corresponding to the n1 frequency band, and controls the operating state of the first transceiver circuit 203 to be the operating state corresponding to the n1 frequency band. The controller controls the operating state of the third power amplifying unit 602 to be the operating state corresponding to the n1 frequency band, and controls the operating state of the third transceiving circuit 603 to be the operating state corresponding to the n1 frequency band.

When the rf system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller controls the first switch 209 to be in the off state. The controller controls the conduction between the fixed end 601c of the third switch 601 and the first contact end 601a, so that the circuit between the output end 205c of the second mixer 205 and the second power amplifying unit 206 is conducted. The controller controls the second phase-locked loop 208 to output the fifth analog signal, controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n78 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n78 frequency band.

It should be understood that the controller may not switch the operation state or the operation state of the first phase-locked loop 204, the first power amplifying unit 202, and the first transceiving circuit 203. The first phase-locked loop 204 may maintain an operating state of outputting the fourth analog signal, the first power amplifying unit 202 maintains an operating state corresponding to the n1 frequency band, and the first transceiver circuit 203 maintains an operating state corresponding to the n1 frequency band. In the process that the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, so that the first signal is prevented from being transmitted in the existing radio frequency system due to the switching to the different-frequency-band dual-transmission state.

Under the condition that the radio frequency system is switched from the different-frequency-band double-transmission state to the same-frequency-band double-transmission state, the controller controls the second phase-locked loop 208 to stop generating the fifth analog signal, or controls the second phase-locked loop 208 to stop working, and controls the first switch 209 to be in the closed state. The controller controls the fixed end 601c of the third switch 601 to be conducted with the second contact point 601b, so that the circuit between the output end 205c of the second mixer 205 and the third power amplifying unit 602 is conducted. The control circuit switches the on/off state of the fixed end 601c of the third switch 601 in the second transmission circuit 21 and each contact end, so as to switch the signal after the mixing processing of the second mixer 205 to be input to the power amplification unit and the transceiver circuit corresponding to the frequency band of the second signal. In addition, the control circuit does not need to switch the operating state of the second power amplifying unit 206, and does not need to wait for the stabilization time after the operating state of the power amplifying unit is changed, so as to shorten the time length of the radio frequency system in the dual-transmission state of the different frequency band, and shorten the switching time length of the radio frequency system from the dual-transmission state of the different frequency band to the dual-transmission state of the same frequency band.

In one possible embodiment, the second phase-locked loop 208 needs the settling time TW1 to switch from the operating state in which the output of the fifth analog signal is stopped to the operating state in which the fifth analog signal is generated. The controller switches the state of the second phase-locked loop 208 according to a preset switching mode, shortens the time for waiting for the second phase-locked loop 208 to be stable, shortens the time length of the radio frequency system in the different-frequency-band dual-transmission state, and shortens the switching time length of the radio frequency system from the different-frequency-band dual-transmission state to the same-frequency-band dual-transmission state.

Under the condition that the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller may control the second phase-locked loop 208 to generate the fifth analog signal at a fifteenth time T15. The modem circuit supplies the second signal of the n78 frequency band to the input terminal 21A of the second transmission circuit 21 at the sixteenth timing T16. Wherein the fifteenth time T15 is before the sixteenth time T16, and a ninth duration Δ T9 between the fifteenth time T15 and the sixteenth time T16 is not less than the settling time TW1 of the second phase locked loop 208. The controller controls the first switch 209 to be in the open state before the sixteenth time T16. The controller controls the fixed end 601c of the third switch 601 to be conducted with the first contact 601a before the sixteenth time T16, so that the output end 205c of the second mixer 205 is conducted with the second power amplifying unit 206.

When the rf system is switched from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band, the modem circuit provides the second signal in the n1 frequency band to the input terminal 21A of the second transmission circuit 21 at the seventeenth time T17. The controller may control the fixed end 601c of the third switch 601 to be conducted with the second contact end 601b before the seventeenth time T17, so that the output end 205c of the second mixer 205 is conducted with the third power amplifying unit 602. The controller controls the first switch 209 to be in a conducting state before the seventeenth time T17, controls the second phase-locked loop 208 to stop generating the fifth analog signal, or controls the second phase-locked loop 208 to be inactive.

In an example, when the radio frequency system is switched from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band, the controller may control the second power amplifying unit 206 to be in the non-operating state, or turn off the second power amplifying unit 206, so as to reduce the power consumption of the radio frequency circuit.

For example, when the rf system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller may control the second phase-locked loop 208 to generate the fifth analog signal at an eighteenth time T18, and control the second power amplifying unit 206 to be in the working state corresponding to the n78 frequency band at a nineteenth time T19. The modem circuit supplies the second signal of the n78 frequency band to the input terminal 21A of the second transmission circuit 21 at the twentieth time T20. Wherein the eighteenth time T18 and the nineteenth time T19 are both before the twentieth time T20, and the tenth time duration Δ T10 between the eighteenth time T18 and the twentieth time T20 is not less than the settling time TW1 of the second phase-locked loop 208, and the eleventh time duration Δ T11 between the nineteenth time T19 and the twentieth time T20 is not less than the settling time TW2 of the second power amplifying unit 206. The controller controls the first switch 209 to be in the off state before the twentieth time T20. The controller controls the fixed end 601c of the third switch 601 to be conducted with the first contact end 601a before the twentieth time T20, so that the output end 205c of the second mixer 205 is conducted with the second power amplifying unit 206.

When the radio frequency system is switched from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band, the modulation and demodulation circuit provides a second signal in the n1 frequency band to the input terminal 21A of the second transmission circuit 21 at a twenty-first time T21. The controller controls the fixed end 601c of the third switch 601 and the second contact end 601b to be conducted before the twenty-first time T21, so that a path is formed between the output end 205c of the second mixer 205 and the third power amplifying unit 602. The controller controls the first switch 209 to be in a conducting state before the twenty-first time T21, controls the second phase-locked loop 208 to stop generating the fifth analog signal, or controls the second phase-locked loop 208 to be inactive. The controller may not turn off the second power amplifying unit 206 and avoid waiting for the time period required for the second power amplifying unit 206 to stabilize.

The controller may also turn off the second power amplifying unit 206, so that the second power amplifying unit 206 does not operate, thereby reducing power consumption of the radio frequency system. For example, the controller may control the second power amplifying unit 206 not to operate, and may be implemented to control the component supplying power to the second power amplifying unit 206 to stop supplying power to the second power amplifying unit 206.

In one example, the control circuit in the radio frequency system may further include a second switch 501, as shown in fig. 8, the second switch 501 is disposed between the second input terminal 201b of the second mixer 205 and the second phase-locked loop 208 in the second transmission circuit 21.

In one illustration, the radio frequency system of fig. 8 may be applied in an NR CA scenario. Taking the example that when the radio frequency system is in the same-frequency-band dual-transmission state, the first signal and the second signal are both n 1-band signals, and when the radio frequency system is in the different-frequency-band dual-transmission state, the first signal is an n 1-band signal, and the second signal is an n 78-band signal, the work flow of the radio frequency system is introduced.

When the radio frequency system is in a same-frequency band dual-transmission state, the controller controls the first switch 209 to be in a closed state, and the first phase-locked loop 204 is conducted with the second input end 205b of the second mixer 205. The controller controls the second switch 501 to be in an open state, and the second phase locked loop 208 is disconnected from the second input 205b of the second mixer 205. The controller controls the conduction between the fixed end 601c and the second contact point 601b of the third switch 601, and a path is formed between the output end 205c of the second mixer 205 and the third power amplifying unit 602. The controller controls the first phase-locked loop 204 to generate the fourth analog signal. The controller controls the operating state of the first power amplifying unit 202 to be the operating state corresponding to the n1 frequency band, and controls the operating state of the first transceiver circuit 203 to be the operating state corresponding to the n1 frequency band. The controller controls the operating state of the third power amplifying unit 602 to be the operating state corresponding to the n1 frequency band, and controls the operating state of the third transceiving circuit 603 to be the operating state corresponding to the n1 frequency band. The controller may adjust the analog signal received by the second input terminal 205b of the second mixer 205 by controlling the on/off states of the second switch 501 and the first switch 209 without changing the operating state of the second phase-locked loop 208 after controlling the second phase-locked loop 208 to generate the fifth analog signal.

Under the condition that the radio frequency system is switched from the same-frequency band dual-transmission state to the different-frequency band dual-transmission state, the modulation Jie Diaodian provides a second signal of an n78 frequency band to the input end 21A of the second transmission circuit 21. The controller controls the first switch 209 to be in the off state. The controller controls the second switch 501 to be in a conducting state, and the fifth analog signal generated by the second phase-locked loop 208 is input to the second input terminal 205b of the second mixer 205. The controller controls the fixed end 601c of the third switch 601 to be conducted with the first contact 601a, so that the output end 205c of the second mixer 205 is conducted with the second power amplifying unit 206. The controller controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n78 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n78 frequency band.

When the radio frequency system is switched from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band, the modulation Jie Diaodian provides a second signal in the n1 frequency band to the input terminal 21A of the second transmission circuit 21. The controller controls the second switch 501 to be in an off state, controls the first switch 209 to be in an on state, and inputs the fourth analog signal generated by the first phase-locked loop 204 to the second input terminal 205b of the second mixer 205. The controller controls the fixed end 601c of the third switch 601 to be conducted with the second contact end 601b, so that the circuit between the output end 205c of the second mixer 205 and the third power amplifying unit 602 is conducted.

In a possible implementation manner, the controller may control the operating state of the first power amplifying unit 202 to be an operating state corresponding to an n1 frequency band, and control the operating state of the first transceiver circuit 203 to be an operating state corresponding to an n1 frequency band. The controller may control the operating state of the third power amplifying unit 602 to be the operating state corresponding to the n1 frequency band, and control the operating state of the third transceiving circuit 603 to be the operating state corresponding to the n1 frequency band. The controller may control the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n78 frequency band, and control the operating state of the third transceiving circuit 603 to be the operating state corresponding to the n78 frequency band. After controlling the working states of each power amplification unit and the transceiver circuit, the controller controls the first switch 209, the second switch 501 and the third switch 601 to realize the switching of the radio frequency system between the different-frequency-band dual-transmission state and the same-frequency-band dual-transmission state.

Illustratively, in a case where the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the modem circuit provides the second signal of the n78 frequency band to the input terminal 21A of the second transmission circuit 21 at the twenty-second time T22. Before the twenty-second time T22, the controller controls the first switch 209 to be in the off state, controls the second switch 501 to be in the on state, and controls the fixed end 601c of the third switch 601 to be in conduction with the first contact end 601a, so that the output end 205c of the second mixer 205 is in conduction with the second power amplifying unit 206.

When the radio frequency system is switched from the dual transmission state in the different frequency band to the dual transmission state in the same frequency band, the modem circuit provides the second signal in the n1 frequency band to the input terminal 21A of the second transmission circuit 21 at a twenty-third time T23. The controller controls the first switch 209 to be in a conducting state, controls the second switch 501 to be in a disconnecting state, and controls the fixed end 601c of the third switch 601 to be in conduction with the second contact end 601b before the twenty-third time T23, so that the output end 205c of the second mixer 205 is in conduction with the third power amplifying unit 602.

As shown in fig. 9, the control circuit in the radio frequency system provided in the embodiment of the present application may include a fourth switch 801, a fifth switch 802, a sixth switch 803, a third mixer 804, and a controller. The radio frequency system provided by the embodiment of the application can also be applied to a radio frequency system in a 3Tx transmission scene.

A first terminal of the fourth switch 801 is connected to the input terminal 21A of the second transmission circuit 21 and a first terminal of the fifth switch 802, respectively, a second terminal of the fourth switch 801 is connected to the first input terminal 804a of the third mixer 804, a second terminal of the fifth switch 802 is connected to the first input terminal 804a of the second mixer 205, and a second input terminal 804b of the third mixer 804 is connected to the first phase-locked loop 204 and the second input terminal 201b of the first mixer 201, respectively.

The sixth switch 803 is a single-pole double-throw switch, a fixed end 803c of the sixth switch 803 is connected to the second power amplifying unit 206, a first contact end 803a of the sixth switch 803 is connected to the output end of the third mixer 804, and a second contact end 803b of the sixth switch 803 is connected to the output end 205c of the second mixer 205.

The controller may further control the fourth switch 801 to be in an off state, the fifth switch 802 to be in an on state, and the fixed end 803c of the sixth switch 803 and the second contact end 803b of the sixth switch 803 to be in an on state when the first signal and the second signal are signals of different frequency bands, so that the signal output by the second mixer 205 is provided to the second power amplifying unit 206.

The controller may further control the fourth switch 801 to be in a conducting state, the fifth switch 802 to be in a disconnecting state, and the fixed end 803c of the sixth switch 803 and the first contact end 803a of the sixth switch 803 to be in a conducting state when the first signal and the second signal are signals of the same frequency band, so that the signal output by the third mixer 804 is provided to the second power amplifying unit 206.

The input and output of the third mixer 804 are respectively denoted as a first input 804a, a second input 804b, an output 804c of the third mixer 804. The first input 804a of the third mixer 804 is connected to the fourth switch 801. A second input 804b of the third mixer 804 is connected to the output of the first phase-locked loop 204. The output 804c of the third mixer 804 is connected to a first contact terminal 803a of a sixth switch 803. The third mixer 804 is configured to mix the second signal received by the first input end 804a with the analog signal output by the first phase-locked loop 204 received by the second input end 804b, and input the processed signal to the second power amplifying unit 206 through the sixth switch 803 via the output end 804c.

The second input 205b of the second mixer 205 is connected to a fifth switch 802. The fifth output terminal 205c of the second mixer 205 is connected to the second contact terminal 803b of the sixth switch 803. The second mixer 205 is configured to mix the analog signal received by the first input terminal 205a and output by the second phase-locked loop 208 with the input signal received by the second input terminal 205b, and input the processed signal to the second power amplifying unit 206 through the sixth switch 803 via the output terminal 205c of the second mixer 205.

In one illustration, the radio frequency system of fig. 9 may be applied to an NR SUL scenario. Taking as an example that when the radio frequency system is in the same-frequency band dual-transmission state, the first signal and the second signal are both signals of n80 frequency bands, and when the radio frequency system is in the different-frequency band dual-transmission state, the first signal is a signal of n80 frequency bands, and the second signal is a signal of n41 frequency bands, the work flow of the radio frequency system is introduced.

When the radio frequency system is in the same frequency band dual-transmission state, the controller controls the first switch 209 to be in the conducting state, so that the first phase-locked loop 204 is conducted with the second input end 205b of the second mixer 205. The controller controls the first phase-locked loop 204 to output the first analog signal, controls the second phase-locked loop 208 to stop generating the second analog signal, or controls the second phase-locked loop 208 to be inactive. The controller controls the operating state of the first power amplifying unit 202 to be the operating state corresponding to the n80 frequency band, and controls the operating state of the first transceiver circuit 203 to be the operating state corresponding to the n80 frequency band. The controller controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n80 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n80 frequency band.

The first analog signal generated by the first phase-locked loop 204 serves as a local oscillation source of a signal transmission path formed by the third mixer 804, the second power amplification unit 206 and the second transceiver circuit 207, and a local oscillation source of a signal transmission path formed by the first mixer 201, the first power amplification unit 202 and the first transceiver circuit 203.

When the rf system is switched from the same-frequency band dual-transmission state to the different-frequency band dual-transmission state, the controller controls the fixed end of the sixth switch 803 to be connected to the second contact end 803b, and a path is formed between the fifth output end 205c of the second mixer 205 and the second power amplifying unit 206. The controller controls the fourth switch 801 to be in an off state and controls the fifth switch 802 to be in an on state, so that the second signal provided by the modem circuit to the input terminal 21A of the second transmission circuit 21 is input to the second mixer 205, while the third mixer 804 has no signal input. The controller controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n41 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n41 frequency band.

In one example, when the radio frequency system is in the dual-transmission state in the different frequency band, the second analog signal generated by the second phase-locked loop 208 serves as a local oscillation source of a signal transmission path formed by the second mixer 205, the second power amplifying unit 206 and the second transceiver circuit 207. The first analog signal output by the first phase locked loop 204 serves as a local oscillation source of a signal transmission path formed by the first mixer 201, the first power amplification unit 202, and the first transceiver circuit 203.

When the radio frequency system is switched from the different-frequency-band dual-transmission state to the same-frequency-band dual-transmission state, the controller controls the fixed end 803c of the sixth switch 803 and the first contact end 803a to be in a conducting state, and a path is formed between the output end 804c of the third mixer 804 and the second power amplifying unit 206. The controller controls the fourth switch 801 to be in a turned-on state and controls the fifth switch 802 to be in a turned-off state, so that the second signal supplied from the modem circuit to the input terminal 21A of the second transmission circuit 21 is input to the third mixer 804, while the second mixer 205 has no signal input. The controller controls the operating state of the second power amplifying unit 206 to be the operating state corresponding to the n80 frequency band, and controls the operating state of the second transceiver circuit 207 to be the operating state corresponding to the n80 frequency band.

It should be understood that the controller may not switch the operation state or the operation state of the first phase-locked loop 204, the first power amplifying unit 202, and the first transceiving circuit 203. The first phase-locked loop 204 may maintain an operating state of generating the first analog signal, the first power amplification unit 202 may maintain an operating state corresponding to the n80 frequency band, and the first transceiver circuit 203 may maintain an operating state corresponding to the n80 frequency band. The modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, so that the first signal is prevented from being interrupted due to the switching to the different-frequency-band dual-transmission state in the conventional radio frequency system.

In another possible implementation, when the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller controls the second phase-locked loop 208 to generate the second analog signal at the twenty-fourth time T24. The controller controls the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band at a twenty-fifth time T25. The modem circuit supplies the second signal of the n41 band to the input terminal 21A of the second transmission circuit 21 at the twenty-sixth time T26.

The twenty-fourth time T24 and the twenty-fifth time T25 are both before the twenty-sixth time T26, a twelfth time length Δ T12 between the twenty-fourth time T24 and the twenty-sixth time T26 is not less than the stabilization time TW1 of the second phase-locked loop 208, and a thirteenth time length Δ T13 between the twenty-fifth time T25 and the twenty-sixth time T26 is not less than the stabilization time TW2 required for the second power amplification unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band.

The controller controls the fourth switch 801 to be in an off state, the fifth switch 802 to be in an on state, and the fixed end 803c of the sixth switch 803 to be in conduction with the second contact end 803c of the sixth switch 803 before the twenty-sixth time T26.

The settling time for switching the operating state of the second transceiver circuit 207 from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band is short, and is usually shorter than the settling time TW1 of the second phase-locked loop 208 and the settling time TW2 of the second power amplification unit 206. The controller may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band before the twenty-sixth time T26.

In one example, a certain settling time is also required for the on/off state of the sixth switch 803 to change, and the settling time of the sixth switch 803 is assumed to be TW3. The controller may control the fixed end of the sixth switch 803 to be conducted with the second contact end 803c of the sixth switch 803 at a twenty-seventh time T27. The twenty-seventh time T27 is before the twenty-sixth time T26, and the fourteenth time duration Δ T14 between the twenty-seventh time T27 and the 19 th time is not less than the settling time TW3 of the sixth switch 803.

When the rf system is switched from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band, the controller controls the second power amplifying unit 206 to switch from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band at the twenty-eighth time T28. The modem circuit supplies the second signal of the n80 band to the input terminal 21A of the second transmission circuit 21 at a twenty-ninth timing T29. Wherein the twenty-eighth time T28 is before the twenty-ninth time T29, and a fifteenth time duration Δ T15 between the twenty-eighth time T28 and the twenty-ninth time T29 is not less than a stable time TW2 for the second power amplifying unit 206 to switch from the operating state corresponding to the n80 frequency band to the operating state corresponding to the n41 frequency band. The controller controls the fourth switch 801 to be in a closed state, the fifth switch 802 to be in an open state, and the fixed end 803c of the sixth switch 803 to be in a conductive state with respect to the first contact end 803a of the sixth switch 803 before a twenty-ninth time T29.

The settling time for switching the operating state of the second transceiver circuit 207 from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band is short, and is usually shorter than the settling time TW1 of the second phase-locked loop 208 and the settling time TW2 of the second power amplification unit 206. The controller may control the operating state of the second transceiver circuit 207 to be switched from the operating state corresponding to the n41 frequency band to the operating state corresponding to the n80 frequency band before the twenty-ninth time T29.

As shown in fig. 10, the second transmission circuit in the radio frequency system according to the embodiment of the present application may further include a seventh switch 901, an eighth switch 902, a fourth mixer 903, a fourth power amplifying unit 904, and a fourth transceiver circuit 905, where the fourth power amplifying unit 904 is connected to the fourth transceiver circuit 905. The radio frequency system provided by the embodiment of the application can also be applied to a radio frequency system in a 3Tx transmission scene.

A first end of the seventh switch 901 is connected to the input end 21A of the second transmission circuit 21 and a first end of the eighth switch 902, a second end of the seventh switch 901 is connected to the first input end 903a of the fourth mixer 903, a second end of the eighth switch 902 is connected to the first input end 205a of the second mixer 205, a second input end 903b of the fourth mixer 903 is connected to the first phase-locked loop 204 and the second input end 201b of the first mixer 201, and an output end of the fourth mixer 903 is connected to the fourth power amplifying unit 904.

The control circuit may further control the seventh switch 901 to be in an off state and the eighth switch 902 to be in an on state when the first signal and the second signal are signals of different frequency bands, so that the second signal is input to the second mixer 205 through the eighth switch 902. The control circuit may further control the seventh switch 901 to be in an on state and the eighth switch 902 to be in an off state when the first signal and the second signal are signals of the same frequency band, so that the second signal is input to the fourth mixer 903 through the seventh switch 901. In a practical application scenario, the control circuit may be implemented as a controller.

In one illustration, the radio frequency system of fig. 10 may be applied in an NR CA scenario. Taking as an example that when the radio frequency system is in the same-frequency band dual-transmission state, the first signal and the second signal are both signals of an n1 frequency band, and when the radio frequency system is in the different-frequency band dual-transmission state, the first signal is a signal of an n1 frequency band, and the second signal is a signal of an n78 frequency band, the work flow of the radio frequency system is introduced.

When the radio frequency system is in the same frequency band dual-transmission state, the modulation Jie Diaodian provides a second signal of the n1 frequency band to the input terminal 21A of the second transmission circuit 21. The controller controls the seventh switch 901 to be in an on state, the eighth switch 902 to be in an off state, the modulation Jie Diaodian inputs the second signal of the n1 band to the input terminal 21A of the second transmission circuit 21, which may be input to the fourth mixer 903 via the seventh switch 901, and the eighth switch 902 to be in an off state, so that the second mixer 205 fails to receive the second signal of the n1 band.

The control circuit controls the first phase locked loop 204 to generate a third analog signal, which the first phase locked loop 204 may provide to the first mixer 201 and the fourth mixer 903. The control circuit controls the operating state of the fourth power amplifying unit 904 to be the operating state corresponding to the n1 frequency band, and controls the operating state of the fourth transceiving circuit 905 to be the operating state corresponding to the n1 frequency band. The fourth power amplifier 904 amplifies the signal output from the fourth mixer 903, and then the fourth transceiver circuit 905 transmits the amplified signal, thereby completing transmission of the second signal in the n1 frequency band.

When the rf system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller controls the seventh switch 901 to be in the off state, and the input end 21A of the second transmission circuit 21 and the first input end 903a of the fourth mixer 903 are disconnected, so that the fourth mixer 903 receives the second signal. The controller controls the eighth switch 902 to be in a conducting state, and the second transmission circuit 21 conducts between the input terminal 21A and the first input terminal 205a of the second mixer 205, so that the second mixer 205 receives the second signal.

It should be understood that the controller may not switch the operation states of the first phase-locked loop 204, the first power amplifying unit 202, and the first transceiving circuit 203. The first phase-locked loop 204 may keep outputting the third analog signal, the operating state of the first power amplifying unit 202 keeps the operating state corresponding to the n1 frequency band, and the operating state of the first transceiver circuit 203 keeps the operating state corresponding to the n1 frequency band. In the process that the radio frequency system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the modulation and demodulation circuit can continuously provide the first signal to the first transmission circuit 20, and the first transmission circuit 20 can continuously transmit the first signal, so that the first signal is prevented from being transmitted in the existing radio frequency system due to the switching to the different-frequency-band dual-transmission state.

When the radio frequency system is in the dual-transmission state of the different frequency band, the controller controls the working state of the second power amplifying unit 206 to be the working state corresponding to the n78 frequency band, and controls the working state of the second transceiver circuit 207 to be the working state corresponding to the n78 frequency band. To reduce the power consumption of the rf system, the controller may control to turn off the fourth power amplifying unit 904, and may also control to turn off the fourth transceiver circuit 905.

When the radio frequency system is switched from the dual-transmission state of the different frequency band to the dual-transmission state of the same frequency band, the controller controls the seventh switch 901 to be in the on state, and a path is formed between the input end 21A of the second transmission circuit 21 and the first input end 903a of the fourth mixer 903, so that the fourth mixer 903 receives the second signal. The controller controls the eighth switch 902 to be in an off state, and the input terminal 21A of the second transmission circuit 21 is disconnected from the first input terminal 205a of the second mixer 205, so that the second mixer 205 cannot receive the second signal. The controller may further control the operating state of the fourth power amplifying unit 904 to be an operating state corresponding to an n1 frequency band, and control the operating state of the fourth transceiver circuit 905 to be an operating state corresponding to the n1 frequency band.

In another possible implementation, when the rf system is switched from the same-frequency-band dual-transmission state to the different-frequency-band dual-transmission state, the controller controls the second phase-locked loop 208 to generate the fourth analog signal at a thirtieth time T30. The modem circuit supplies the second signal of the n78 band to the input terminal 21A of the second transmission circuit 21 at the thirty-first timing T31. Wherein the thirtieth time T30 is before the thirtieth time T30, and a sixteenth time duration Δ T16 between the thirtieth time T30 and the thirty-first time T31 is not less than the settling time TW1 of the second phase locked loop 208. The controller controls the seventh switch 901 to be in the open state and controls the eighth switch 902 to be in the closed state before the thirty-first time T31.

When the radio frequency system is switched from the dual-transmission state in the different frequency band to the dual-transmission state in the same frequency band, the modem circuit provides the second signal in the n1 frequency band to the input terminal 21A of the second transmission circuit 21 at a thirty-second time T32. The controller may control the eighth switch 902 to be in the open state and the seventh switch 901 to be in the closed state before the thirty-second time T32. The controller may further control the operating state of the fourth power amplifying unit 904 at a thirty-third time T33 to be an operating state corresponding to the n1 frequency band, where the thirty-third time T33 is before a thirty-second time T32, and a seventeenth time length Δ T17 between the thirty-third time T33 and the thirty-second time T32 is not less than the stabilization time of the fourth power amplifying unit 904.

The embodiment of the present application further provides a communication device 1000, and as shown in fig. 11, the communication device 1000 may include the foregoing radio frequency system. The communication apparatus 1000 may be implemented as a terminal, such as a smart phone, a tablet computer, a notebook computer, or the like, and certainly may also be a network device, such as a base station, an Access Point (AP), or the like.

In one example, as shown in fig. 12, a terminal 1100 includes a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identity Module (SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

The first transmission circuit 20 and the second transmission circuit 21 in the radio frequency system provided by the embodiment of the present application may be integrated in the mobile communication module 150. The mobile communication module 150 may provide a solution including wireless communication of 2G/3G/4G/5G, etc. applied on the terminal 1100. The first transmission circuit 20 and the second transmission circuit 21 in the radio frequency system provided in the embodiment of the present application may also be integrated in the wireless communication module 160. The wireless communication module 160 may provide a solution for wireless communication applied to the electronic device 100, including Wireless Local Area Networks (WLANs), such as Wi-Fi networks, bluetooth (BT), global Navigation Satellite Systems (GNSS), frequency Modulation (FM), near Field Communication (NFC), infrared (infrared, IR), and the like. The control circuit in the radio frequency system provided in the embodiment of the present application may be disposed in the processor 110.

In another example, fig. 13 shows a schematic structure diagram of a communication apparatus 1300. The communication apparatus 1300 may be a chip, a network device (e.g., a base station), or other network devices.

The communications apparatus 1300 includes one or more processors 1301, a transceiver 1302, and an antenna 1303. The processor 1301 may be a general purpose processor, a special purpose processor, or the like. For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a communication device (e.g., a base station, a terminal, or a chip), execute a software program, and process data of the software program.

The transceiving unit 1302 may include all or part of a circuit structure of any one of the foregoing radio frequency systems, and is configured to implement a signal transceiving function, such as a function of transmitting signals in different frequency bands, through the antenna 1303. The radio frequency system provided by the embodiment of the present application may also be referred to as a transceiver or a transceiver.

In one possible design, one or more memories 1304 may be included in communications device 1300. Optionally, the memory may further store data therein. Optionally, instructions and/or data may also be stored in the processor. Such as instructions to control the radio frequency system. The processor and the memory may be provided separately or may be integrated together.

Based on the same technical concept, the present application further provides a radio frequency system control method, which is applied to a radio frequency system, where the radio frequency system includes a first transmission circuit 20 and a second transmission circuit 21, the first transmission circuit includes a first phase-locked loop 204, and the second transmission circuit 20 includes a second phase-locked loop 208. In one example, the controller may perform a control method to control the radio frequency system. As shown in fig. 14, the control method may include the steps of:

in step S1401, if it is determined that the first signal input to the first transmission circuit and the second signal input to the second transmission circuit are signals of different frequency bands.

Step S1402, controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, so that the first transmission circuit performs mixing processing on the first signal using the first analog signal.

Step S1403, the second phase-locked loop is controlled to generate a second analog signal according to the frequency band of the second signal, so that the second transmission circuit performs frequency mixing processing on the second signal by using the second analog signal.

In one possible embodiment, if the controller determines that the first signal and the second signal are signals of the same frequency band, the controller controls any one of the first phase-locked loop 204 and the second phase-locked loop 208 to generate the third analog signal according to the same frequency band. The controller supplies the third analog signal to the first transmission circuit 20 and the second transmission circuit 21, causes the first transmission circuit 20 to perform mixing processing of the first signal using the third analog signal, and causes the second transmission circuit 21 to perform mixing processing of the second signal using the third analog signal.

In a possible implementation, the second transmission circuit 21 in the radio frequency system may further include a second power amplifying unit 206. If the controller determines that the first signal and the second signal are signals of the same frequency band, the controller controls the second power amplifying unit 206 to be in a working state of amplifying the signals of the same frequency band according to the same frequency band.

If the controller determines that the first signal and the second signal are signals of different frequency bands, the controller controls the second power amplifying unit 206 to be in the working state of amplifying the second signal according to the frequency band of the second signal at a first time before the second signal is input to the input end 21A of the second transmission circuit 21, wherein a first time length between the first time and the time when the second signal is input is not less than the stabilization time of the second power amplifying unit 206.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the controller may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.

Based on the above embodiments, the present application further provides a computer storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer executes the radio frequency system control method provided by the above embodiments.

The embodiment of the present application also provides a computer program product, which includes instructions, when the computer program product runs on a computer, the computer is caused to execute the radio frequency control method provided by the above embodiment.

This application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A radio frequency system is characterized by comprising a first transmission circuit, a second transmission circuit and a control circuit;

the first transmission circuit comprises a first frequency mixer, a first power amplification unit and a first transceiving circuit which are sequentially connected, wherein a first input end of the first frequency mixer is connected with an input end of the first transmission circuit, and a second input end of the first frequency mixer is connected with a first phase-locked loop;

the second transmission circuit comprises a second frequency mixer, a second power amplification unit and a second transceiving circuit which are sequentially connected, wherein a first input end of the second frequency mixer is connected with an input end of the second transmission circuit, and a second input end of the second frequency mixer is connected with a second phase-locked loop;

the control circuit is used for controlling the first phase-locked loop to generate a first analog signal to be provided to the first frequency mixer according to the frequency band of the first signal and controlling the second phase-locked loop to generate a second analog signal to be provided to the second frequency mixer according to the frequency band of the second signal when the first signal input by the input end of the first transmission circuit and the second signal input by the input end of the second transmission circuit are signals of different frequency bands.

2. The radio frequency system of claim 1, wherein the control circuit is further to:

when the first signal and the second signal are signals of the same frequency band, controlling one phase-locked loop of the first phase-locked loop and the second phase-locked loop to be in a working state, and controlling the other phase-locked loop to be in a non-working state;

and controlling the phase-locked loop in a working state according to the same frequency band to generate third analog signals which are respectively provided for the first frequency mixer and the second frequency mixer.

3. The radio frequency system of claim 2, wherein the control circuit comprises a controller and a first switch;

a first end of the first switch is connected with a second input end of the first mixer and the first phase-locked loop respectively, and a second end of the first switch is connected with a second input end of the second mixer and the second phase-locked loop respectively;

the controller is configured to control the first switch to be in an off state when the first signal and the second signal are signals of different frequency bands, control the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, and input the first analog signal to the first mixer; controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal, and inputting the second analog signal into the second mixer; and when the first signal and the second signal are signals of the same frequency band, controlling the first switch to be in a conducting state, controlling the phase-locked loop in a working state to generate a third analog signal according to the same frequency band, and enabling the third analog signal to be respectively supplied to a frequency mixer connected with the phase-locked loop in a non-working state through the first switch.

4. The radio frequency system of claim 3, wherein the active phase-locked loop is the first phase-locked loop, the control circuit further comprising a second switch;

a first end of the second switch is connected to the second phase-locked loop, and a second end of the second switch is respectively connected to a second input end of the second mixer and a second end of the first switch;

the controller is specifically configured to control the second switch to be in a conducting state when the first signal and the second signal are signals of different frequency bands; and when the first signal and the second signal are signals of the same frequency band, controlling the second switch to be in an off state.

5. The radio frequency system according to any of claims 1 to 4, wherein the second transmission circuit further comprises a third switch, a third power amplification unit, and a third transceiver circuit, the third power amplification unit being connected to the third transceiver circuit;

the third switch is a single-pole double-throw switch, a fixed end of the third switch is connected with an output end of the second mixer, a first contact end of the third switch is connected with the second power amplification unit, and a second contact end of the third switch is connected with the third power amplification unit;

the control circuit is further configured to control a fixed end of the third switch and the first contact end to be in a conducting state when the first signal and the second signal are signals of different frequency bands, so that a signal output by the second mixer is provided to the second power amplifying unit; and when the first signal and the second signal are signals of the same frequency band, controlling the fixed end of the third switch and the second contact end to be in a conducting state, so that the signal output by the second mixer is provided for the third power amplification unit.

6. The radio frequency system of claim 1, wherein the control circuit comprises a fourth switch, a fifth switch, a sixth switch, and a third mixer, a controller;

a first end of a fourth switch is connected with the input end of the second transmission circuit and a first end of the fifth switch respectively, a second end of the fourth switch is connected with a first input end of the third mixer, a second end of the fifth switch is connected with a first input end of the second mixer, and a second input end of the third mixer is connected with the first phase-locked loop and the first mixer respectively;

the sixth switch is a single-pole double-throw switch, a fixed end of the sixth switch is connected with the second power amplification unit, a first contact end of the sixth switch is connected with an output end of the third mixer, and a second contact end of the sixth switch is connected with an output end of the second mixer;

the controller is specifically configured to control the fourth switch to be in an off state, control the fifth switch to be in an on state, control a fixed end of the sixth switch and a second contact end of the sixth switch to be in an on state, and enable a signal output by the second mixer to be provided to the second power amplifying unit when the first signal and the second signal are signals of different frequency bands; when the first signal and the second signal are signals of the same frequency band, the fourth switch is controlled to be in a conducting state, the fifth switch is controlled to be in a disconnecting state, the fixed end of the sixth switch and the first contact end of the sixth switch are controlled to be in a conducting state, and the signal output by the third mixer is provided for the second power amplification unit.

7. The radio frequency system according to claim 1, wherein the second transmission circuit further includes a seventh switch, an eighth switch, a fourth mixer, a fourth power amplification unit, and a fourth transceiver circuit, the fourth power amplification unit being connected to the fourth transceiver circuit;

a first end of a seventh switch is connected to the input end of the second transmission circuit and the first end of the eighth switch, a second end of the seventh switch is connected to the first input end of the fourth mixer, a second end of the eighth switch is connected to the first input end of the second mixer, a second input end of the fourth mixer is connected to the first phase-locked loop and the first mixer, and an output end of the fourth mixer is connected to the fourth power amplification unit;

the control circuit is further configured to control the seventh switch to be in an off state and control the eighth switch to be in an on state when the first signal and the second signal are signals of different frequency bands, so that the second signal is input to the second mixer through the eighth switch; and when the first signal and the second signal are signals of the same frequency band, controlling the seventh switch to be in a conducting state, and controlling the eighth switch to be in a disconnecting state, so that the second signal is input to the fourth mixer through the seventh switch.

8. The radio frequency system of any of claims 1-4, 6, and 7, wherein the control circuit is specifically configured to:

when the first signal and the second signal are signals of different frequency bands, the second phase-locked loop is controlled to generate the second analog signal according to the frequency band of the second signal at a first moment before the second signal is input to the input end of the second transmission circuit, wherein a second duration between the first moment and the moment when the second signal is input to the input end of the second transmission circuit is not less than the stabilization time of the second phase-locked loop.

9. The radio frequency system of any of claims 1-4, 6, and 7, wherein the control circuit is further configured to:

when the first signal and the second signal are signals of different frequency bands, the second power amplification unit is controlled to be in a working state of amplifying the second signal at a second moment before the second signal is input to the input end of the second transmission circuit, wherein a first duration between the second moment and the moment when the second signal is input to the input end of the second transmission circuit is not less than the stabilization time of the second power amplification unit.

10. A radio frequency system control method, applied to a radio frequency system including a first transmission circuit and a second transmission circuit, the first transmission circuit including a first phase-locked loop, the second transmission circuit including a second phase-locked loop, the method comprising:

if the first signal input into the first transmission circuit and the second signal input into the second transmission circuit are determined to be signals of different frequency bands;

controlling the first phase-locked loop to generate a first analog signal according to the frequency band of the first signal, so that the first transmission circuit performs frequency mixing processing on the first signal by using the first analog signal;

and controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal, so that the second transmission circuit performs frequency mixing processing on the second signal by using the second analog signal.

11. The method of claim 10, wherein the method further comprises:

if the first signal and the second signal are determined to be signals of the same frequency band, controlling any phase-locked loop of the first phase-locked loop and the second phase-locked loop to generate a third analog signal according to the same frequency band;

the third analog signal is supplied to the first transmission circuit and the second transmission circuit, the first transmission circuit is caused to perform mixing processing on the first signal using the third analog signal, and the second transmission circuit is caused to perform mixing processing on the second signal using the third analog signal.

12. The method of claim 10 or 11, wherein the second transmission circuit further comprises a second power amplification unit, the method further comprising:

if the first signal and the second signal are determined to be signals of the same frequency band, controlling the second power amplification unit to be in a working state of amplifying the signals of the same frequency band according to the same frequency band;

and if the first signal and the second signal are determined to be signals of different frequency bands, controlling the second power amplification unit to be in a working state for amplifying the second signal according to the frequency band of the second signal at a first moment before the second signal is input to the input end of the second transmission circuit, wherein a first time length between the first moment and the moment when the second signal is input is not less than the stabilization time of the second power amplification unit.

13. The method of claim 10 or 11, wherein said controlling the second phase locked loop to generate a second analog signal according to the frequency band of the second signal comprises:

and controlling the second phase-locked loop to generate a second analog signal according to the frequency band of the second signal at a second moment before the second signal is input into the input end of the second transmission circuit, wherein a second duration between the second moment and the moment when the second signal is input is not less than the stabilization time of the second phase-locked loop.

14. A communication device comprising a radio frequency system according to any of claims 1-9.