CN111404576A

CN111404576A - Radio frequency system and electronic equipment

Info

Publication number: CN111404576A
Application number: CN202010213179.4A
Authority: CN
Inventors: 宋志强
Original assignee: Realme Chongqing Mobile Communications Co Ltd
Current assignee: Realme Chongqing Mobile Communications Co Ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-07-10
Anticipated expiration: 2040-03-24
Also published as: CN111404576B

Abstract

The embodiment of the application discloses a radio frequency system and electronic equipment, wherein the radio frequency system comprises a radio frequency transceiver, a transmitting module, N receiving modules, N antennas, a single-pole N-throw SPNT switch and N single-pole double-throw SP2T switches; the N antennas are connected with the N SP2T switches in a one-to-one correspondence manner, the N SP2T switches are connected with the N receiving modules in a one-to-one correspondence manner, and N receiving ends of the radio frequency transceiver are connected with first ends of the N receiving modules in a one-to-one correspondence manner; the transmitting end of the radio frequency transceiver is connected with the first end of the transmitting module, and the second end of the transmitting module is connected with the first antenna through the SPNT switch and the first SP2T switch; the first end of the first receiving module is connected with the first receiving end of the radio frequency transceiver, and the second end of the first receiving module is connected with the first SP2T switch. The embodiment of the application can improve the receiving sensitivity of the radio frequency transceiver.

Description

Radio frequency system and electronic equipment

Technical Field

The application relates to the technical field of mobile terminals, in particular to a radio frequency system and electronic equipment.

Background

With the widespread use of a large number of electronic devices such as smart phones, smart phones have more and more applications and more powerful functions, and smart phones are developed towards diversification and personalization directions and become indispensable electronic products in user life. With the development of communication technology, in a mobile communication system, an electronic device adopts a multi-antenna radio frequency system architecture.

For N antennas, when the transmission signal is switched between N antennas, the NPNT switch is needed to implement the switching, and the received signal passes through the NPNT switch and then enters the radio frequency transceiver. The NPNT switch has a complicated internal structure and large loss, which results in poor receiving sensitivity of the rf transceiver.

Disclosure of Invention

The embodiment of the application provides a radio frequency system and electronic equipment, which can improve the receiving sensitivity of a radio frequency transceiver.

In a first aspect, an embodiment of the present application provides a radio frequency system, including a radio frequency transceiver, a transmitting module, N receiving modules, N antennas, a single-pole N-throw SPNT switch, and N single-pole double-throw SP2T switches; the N antennas are connected with the N SP2T switches in a one-to-one correspondence manner, the N SP2T switches are connected with the N receiving modules in a one-to-one correspondence manner, and N receiving ends of the radio frequency transceiver are connected with first ends of the N receiving modules in a one-to-one correspondence manner; n is a positive integer greater than or equal to 2;

the transmitting end of the radio frequency transceiver is connected with the first end of the transmitting module, and the second end of the transmitting module is connected with the first antenna through the SPNT switch and the first SP2T switch; the first SP2T switch is any one of the N SP2T switches, and the first antenna is one of the N antennas corresponding to the first SP2T switch;

the first end of the first receiving module is connected with the first receiving end of the radio frequency transceiver, and the second end of the first receiving module is connected with the first SP2T switch; the first receiving module is any one of the N receiving modules, and the first receiving end of the radio frequency transceiver is one of the N receiving ends of the radio frequency transceiver corresponding to the first receiving module; the first SP2T switch is one of the N SP2T switches corresponding to the first receiving module.

In a second aspect, an embodiment of the present application provides an electronic device, including a baseband chip and the radio frequency system of any one of the first aspect, where the baseband chip is configured to transmit a baseband signal to the radio frequency system, and the radio frequency system modulates the baseband signal and then sends the modulated baseband signal; the baseband chip is also used for receiving and processing the demodulated baseband signal from the radio frequency system.

It can be seen that, in the embodiment of the present application, one SPNT switch and N SP2T switches are used, and an NPNT switch is not required, so that insertion loss of a receiving end of a radio frequency system can be reduced, and receiving sensitivity of a radio frequency transceiver can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a radio frequency system provided in the prior art;

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 another radio frequency system provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of another radio frequency system provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, system, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The electronic device according to the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, which have wireless communication functions, and various forms of User Equipment (UE) (e.g., Mobile phones), Mobile Stations (MSs), terminal devices (terminal devices), and so on. For convenience of description, the above-mentioned devices are collectively referred to as electronic devices.

For convenience of understanding the embodiment of the present application, a radio frequency system of a terminal device such as a current mobile phone is described below.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a radio frequency system provided in the prior art. As shown in fig. 1, the radio frequency system includes a radio frequency transceiver, a transmitting module, N receiving modules, and N antennas, where the transmitting module and the N receiving modules are connected to the N antennas through N single-pole double-throw SP2T switches and an N-pole N-throw NPNT switch, when the radio frequency system transmits a signal, the transmitting signal can be realized by the NPNT switch when the N antennas are switched, and the receiving signal passes through the NPNT switch and the receiving module to the radio frequency transceiver. The NPNT switch has a complicated internal structure and large loss, which results in poor receiving sensitivity of the rf transceiver. N is a positive integer greater than or equal to 2.

Based on this, the embodiment of the present application provides a new radio frequency system, and an SPNT switch and N SP2T switches are used instead of an NPNT switch, so that an NPNT switch is not required, which can reduce insertion loss at a receiving end of the radio frequency system and improve receiving sensitivity of a radio frequency transceiver.

The radio frequency system in the embodiment of the present application is applied to Time Division Duplex (TDD). The uplink and downlink conversion time can be flexibly set, so that asymmetric uplink and downlink service bandwidths can be realized, and the realization of the internet service (for example, the downlink bandwidth is far larger than the uplink bandwidth) with obvious uplink and downlink asymmetry can be facilitated. TDD also eliminates the need for transmit-receive isolators.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a radio frequency system according to an embodiment of the present disclosure, as shown in fig. 2, the radio frequency system 100 includes a radio frequency transceiver 11, a transmitting module 12, N receiving modules (e.g., the

receiving modules

131, 132, … 13N shown in fig. 2), N antennas 14 (e.g., the

antennas

141, 142, … 14N shown in fig. 2), a single-pole N-throw SPNT switch 15, and N single-pole double-throw SP2T switches (e.g., the

SP2T switches

161, 162, … 16N shown in fig. 2); the N antennas are connected to the N SP2T switches in a one-to-one correspondence (as shown in fig. 2, the antenna 141 is connected to the SP2T switch 161, the antenna 142 is connected to the SP2T switch 162, the … antenna 14N is connected to the SP2T switch 16N), the N SP2T switches are connected to the N receiving modules in a one-to-one correspondence (as shown in fig. 2, the receiving module 131 is connected to the SP2T switch 161, the receiving module 132 is connected to the SP2T switch 162, the … receiving module 13N is connected to the SP2T switch 16N), the N receiving ends of the rf transceiver 11 are connected to the first ends of the N receiving modules in a one-to-one correspondence (the receiving

ends

111, 112, 11N of the rf transceiver 11, the first end 1311 of the receiving module 131, the first end 1321 of the receiving module 132, the first end 13N1 of the receiving module 13N; the receiving end 111 of the rf transceiver 11 is connected to the first end 1311 of the receiving module 131, The receiving end 112 of the rf transceiver 11 is connected to the first end 1321 of the receiving module 132, and the receiving end 11N of the … rf transceiver 11 is connected to the first end 13N1 of the receiving module 13N); n is a positive integer greater than or equal to 2;

the transmitting end 110 of the rf transceiver 11 is connected to the first end 121 of the transmitting module 12, and the second end 122 of the transmitting module 12 is connected to the first antenna 141 through the SPNT switch 15 and the first SP2T switch 161; the first SP2T switch 161 is any one of the N SP2T switches, and the first antenna 141 is one of the N antennas correspondingly connected to the first SP2T switch 161;

a first end 1311 of the first receiving module 131 is connected to the first receiving end 111 of the rf transceiver 11, and a second end 1312 of the first receiving module 131 is connected to the first SP2T switch 161; the first receiving module 131 is any one of the N receiving modules, and the first receiving terminal 1311 of the rf transceiver 11 is one of the N receiving terminals of the rf transceiver 11, which is correspondingly connected to the first receiving module 131; the first SP2T switch 161 is one of the N SP2T switches corresponding to the first receiving module 131.

In this embodiment, the rf transceiver 11 may include a transmitting end 110 and N receiving ends (111, 112,. 11N), and the rf transceiver 11 may transmit the modulated rf signal through the transmitting end 110 and may receive the rf signal to be demodulated through the N receiving ends.

When transmitting a signal, the transmitting end 110 of the radio frequency transceiver 11 may be connected to the first end 121 of the transmitting module 12, and the transmitting module 12 may amplify and filter the signal transmitted by the transmitting end 110 and then transmit the amplified signal through the first antenna 141;

when receiving a signal, after the first antenna 141 receives the signal, the first receiving module 131 may amplify and filter the signal received by the first antenna 141 and send the amplified signal to the first receiving end 111 of the radio frequency transceiver 11 through the first end 1311.

The SPNT switch 15 may be a full-connection switch or a non-full-connection switch. A fully connected switch refers to a switch in which each P port and all T ports can be connected. A non-fully connected switch refers to a switch where there is a P port that is not connected to all T ports.

If the SPNT switch 15 is a fully connected switch, the P port of the SPNT switch 15 can be connected to all of the N T ports. If the SPNT switch 15 is a non-fully connected switch, the P-port of the SPNT switch 15 is connected to only a portion of the N T-ports.

In the case where SPNT switch 15 is a fully connected switch, SPNT switch 15 may implement N-way signal simultaneous transmission with N SP2T switches.

The SP2T switch may be a full-connection switch or a non-full-connection switch. When the SPNT switch 15 is a full-connection switch, the SPNT switch 15 can transmit and receive N signals to and from N antennas.

The rf system 100 in the embodiment of the present application uses one SPNT switch and N SP2T switches, and does not need to use an NPNT switch, which can reduce the insertion loss of the receiving end of the rf system and improve the receiving sensitivity of the rf transceiver.

Optionally, referring to fig. 3, fig. 3 is a schematic structural diagram of another radio frequency system provided in an embodiment of the present application, and fig. 3 is obtained by further optimizing on the basis of fig. 2. As shown in fig. 3, the transmission module 12 includes a Power Amplifier (PA) 123 and a transmission filter 124, a first end of the PA 123 is a first end 121 of the transmission module 12, a second end of the PA 123 is connected to a first end of the transmission filter 124, and a second end of the transmission filter 124 is a second end 122 of the transmission module 12.

The second end of the transmit filter 124 is connected to the P port P1 of the SPNT switch 15, the first T port T1 of the SPNT switch 15 is connected to the first T port T1 of the first SP2T switch 161, the P port P1 of the first SP2T switch 161 is connected to the first antenna 141, and the first T port T1 of the SPNT switch 15 is one of the N T ports (T1, T2, … TN) of the SPNT switch 15 connected to the first T port T1 of the first SP2T switch 161.

The transmit filter 124 may be a Surface Acoustic Wave (SAW) filter.

Optionally, as shown in fig. 3, the first receiving module 131 includes a first low noise amplifier (L NA)1313 and a first receiving filter 1314, a first end of the first receiving filter 1313 is a second end 1312 of the first receiving module 131, a second end of the first receiving filter 1313 is connected to the first end of the first low noise amplifier 1313, and a second end of the first low noise amplifier 1313 is a first end 1311 of the first receiving module.

Similarly, the second receiving module 132 includes a second low noise amplifier 1323 and a second receiving filter 1324, a first end of the second receiving filter 1323 is a second end 1322 of the second receiving module 132, a second end of the second receiving filter 1323 is connected to a first end of the second low noise amplifier 1323, and a second end of the second low noise amplifier 1323 is a second end 1321 of the second receiving module.

Similarly, the nth receiving module 13N includes an nth low noise amplifier 13N3 and an nth receiving filter 13N4, the first end of the nth receiving filter 13N3 is the second end 13N2 of the nth receiving module 13N, the second end of the nth receiving filter 13N3 is connected to the first end of the nth low noise amplifier 13N3, and the second end of the nth low noise amplifier 13N3 is the nth end 13N1 of the nth receiving module.

The first receiving filter 1313, the second receiving filter 1324, and the nth receiving filter 13N3 may be Surface Acoustic Wave (SAW) filters.

Optionally, as shown in fig. 3, the first receiving module 131 includes a first low noise amplifier 1313 and a first receiving filter 1314, a first end of the first receiving filter 1314 is a second end 1312 of the first receiving module 131, a second end of the first receiving filter 1314 is connected to a first end of the first low noise amplifier 1313, and a second end of the first low noise amplifier 1313 is a first end 1311 of the first receiving module 131. Wherein a first end of the first receive filter 1314 is connected to the second T-port T2 of the first SP2T switch 161.

Similarly, the second receiving module 132 includes a second low noise amplifier 1323 and a second receiving filter 1324, a first end of the second receiving filter 1324 is a second end 1322 of the second receiving module 132, a second end of the second receiving filter 1324 is connected to a first end of the second low noise amplifier 1323, and a second end of the second low noise amplifier 1323 is a first end 1321 of the second receiving module 132. Wherein a first terminal of the second receiving filter 1324 is connected to the second T-port T2 of the second SP2T switch 162.

Similarly, the nth receiving module 13N includes an nth low noise amplifier 13N3 and an nth receiving filter 13N4, the first end of the nth receiving filter 13N4 is the second end 13N2 of the nth receiving module 13N, the second end of the nth receiving filter 13N4 is connected to the first end of the nth low noise amplifier 13N3, and the second end of the nth low noise amplifier 13N3 is the first end 13N1 of the nth receiving module 13N. Wherein the first terminal of the Nth receiving filter 13N4 is connected to the second T port T2 of the second SP2T switch 162.

The second T port T2 of the SPNT switch 15 is connected to the first T port T1 of the second SP2T switch 162, and the nth T port TN of the SPNT switch 15 is connected to the first T port T1 of the nth SP2T switch 16N.

The radio frequency system 100 shown in fig. 3 is configured to control, through the N SP2T switches, at least one of N receiving paths between N receiving ends of the radio frequency transceiver and the N antennas to be turned on, and receive a signal through at least one of the N antennas, so as to implement a receiving function of the radio frequency system.

In this embodiment, the radio frequency system 100 may control a connection relationship of the N SP2T switches through a Mobile Industry Processor Interface (MIPI) and/or a General Purpose Input/Output (GPIO) control unit, and the MIPI control unit and/or the GPIO control unit may control whether at least one of N receiving paths between the N receiving terminals of the radio frequency transceiver and the N antennas is turned on or not by controlling the connection relationship of the N SP2T switches. For example, the MIPI control unit and/or the GPIO control unit may control connection and disconnection between the P-port and the T-port of the above-mentioned N SP2T switches.

In the embodiment of the application, the receiving function of the radio frequency system can be realized by conducting at least one receiving path of the N receiving paths. When the N receiving paths are conducted simultaneously, the function of simultaneously receiving N signals can be realized.

Optionally, the radio frequency system shown in fig. 3 is configured to control, through the N SP2T switches, conduction of N receiving paths between the N receiving ends of the radio frequency transceiver and the N antennas, and receive signals through the N antennas, so as to implement a downlink carrier aggregation function of the radio frequency system.

In this embodiment, the radio frequency system 100 may control the connection relationship of the N SP2T switches through an MIPI control unit and/or a GPIO control unit to control all the N receiving paths between the N receiving ends of the radio frequency transceiver and the N antennas to be on. For example, the MIPI control unit and/or the GPIO control unit may control the connection between the P port P1 of each SP2T switch and the corresponding second T port T2 among the N SP2T switches, so as to implement that N receiving paths are all turned on.

Optionally, the radio frequency system shown in fig. 3 is further configured to control, through the SPNT switch and the N SP2T switches, a transmitting end of the radio frequency transceiver to be electrically connected to the first antenna, and transmit a signal through the first antenna, so as to implement a transmitting function of the radio frequency system.

In this embodiment, the radio frequency system 100 may control a connection relationship between the SPNT switch 15 and the N SP2T switches through an MIPI control unit and/or a GPIO control unit to control the transmitting end of the radio frequency transceiver to be conducted with the first antenna. For example, the MIPI control unit and/or the GPIO control unit may control the connection between the P port P1 of each SP2T switch and the corresponding first T port T1 among the N SP2T switches, and control the connection between the P port P1 of the SPNT15 and the corresponding first T port T1, second T port T2, and … and the NT port TN, so as to implement an N-way transmission function of the radio frequency system.

The first antenna 141, the second antenna 142, and the … may be antennas having a transmitting/receiving capability, as the nth antenna 14N.

Referring to fig. 4, fig. 4 is a schematic structural diagram of another radio frequency system according to an embodiment of the present application, and as shown in fig. 4, fig. 4 is further optimized based on fig. 3. As shown in fig. 4, the radio frequency system 100 is applied to an electronic device, the electronic device includes a main board, the main board includes a first area 201 and a second area 202 which are adjacent to each other, the radio frequency transceiver 11, the transmitting module 12 and the single-pole N-throw SPNT switch 15 are disposed in the first area 201, and the N receiving modules (such as the receiving

modules

131, 132 and … 13N shown in fig. 4), the N antennas (such as the

antennas

141, 142 and … 14N shown in fig. 4) and the N single-pole double-throw SP2T switches (such as the SP2T switches 161, 162 and … 16N shown in fig. 4) are disposed in the second area 202.

The overall arrangement of the radio frequency system of this application embodiment puts N receiving module and N antenna in same region for N receiving module is close to N antenna and puts, can shorten the length of the connecting wire between N receiving module and the N antenna, reduces the line insertion loss of walking between N receiving module and the N antenna, has greatly optimized the sensitivity of reception.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, as shown in fig. 5, the electronic device 300 may include a radio frequency system 100 and a baseband chip 400, where the baseband chip 400 is configured to transmit a baseband signal to the radio frequency system 100, and the radio frequency system 100 modulates and then transmits the baseband signal, and is configured to receive and process the demodulated baseband signal from the radio frequency system 100.

In the embodiment of the present application, the baseband chip 400 may have a channel coding and decoding function, a source coding and decoding function, and a signaling processing function. In some embodiments, the baseband chip 400 may also be equipped with modem functionality.

In transmitting a signal, the baseband chip 400 may convert information to be transmitted into a baseband signal. The radio frequency transceiver 11 may receive a baseband signal transmitted by the baseband chip 400, and the radio frequency transceiver 11 may convert the baseband signal into a modulated signal whose frequency band is suitable for transmission in a channel. The transmitting end 110 of the radio frequency transceiver 11 may be connected to the first end 121 of the transmitting module 12, and the transmitting module 12 may amplify and filter the modulated signal transmitted by the transmitting end 110 and then transmit the amplified signal through the first antenna 141;

when receiving a signal, after the first antenna 141 receives the signal, the first receiving module 131 may amplify and filter the signal received by the first antenna 141 and send the amplified signal to the first receiving end 111 of the radio frequency transceiver 11 through the first end 1311. The rf transceiver 11 may demodulate the amplified and filtered signal to obtain a baseband signal, and send the baseband signal to the baseband chip 400 for processing.

It should be noted that the baseband chip 400 and the radio frequency transceiver 11 may be integrated together or separated, and the embodiment of the present application is described by taking separation as an example. When the baseband chip 400 is integrated in the rf transceiver 11, the rf transceiver 11 may also have the function of the baseband chip 400.

In the embodiment of the application, one SPNT switch and N SP2T switches are adopted, and an NPNT switch is not required, so that the insertion loss of a receiving end of a radio frequency system can be reduced, and the receiving sensitivity of a radio frequency transceiver is improved.

The foregoing is an implementation of the embodiments of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the embodiments of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A radio frequency system is characterized by comprising a radio frequency transceiver, a transmitting module, N receiving modules, N antennas, a single-pole N-throw SPNT switch and N single-pole double-throw SP2T switches; the N antennas are connected with the N SP2T switches in a one-to-one correspondence manner, the N SP2T switches are connected with the N receiving modules in a one-to-one correspondence manner, and N receiving ends of the radio frequency transceiver are connected with first ends of the N receiving modules in a one-to-one correspondence manner; n is a positive integer greater than or equal to 2;

2. The radio frequency system according to claim 1, wherein the transmission module comprises a power amplifier and a transmission filter, the first end of the power amplifier is the first end of the transmission module, the second end of the power amplifier is connected to the first end of the transmission filter, and the second end of the transmission filter is the second end of the transmission module.

3. The radio frequency system of claim 2, wherein the second terminal of the transmit filter is connected to a P-port of the SPNT switch, a first T-port of the SPNT switch is connected to a first T-port of the first SP2T switch, a P-port of the first SP2T switch is connected to the first antenna, and the first T-port of the SPNT switch is one of the N T-ports of the SPNT switch connected to the first T-port of the first SP2T switch.

4. The RF system of claim 3, wherein the first receiving module comprises a first low noise amplifier and a first receiving filter, the first end of the first receiving filter is the second end of the first receiving module, the second end of the first receiving filter is connected to the first end of the first low noise amplifier, and the second end of the first low noise amplifier is the first end of the first receiving module.

5. The radio frequency system according to claim 4, wherein the first end of the first receive filter is connected to the second T port of the first SP2T switch.

6. The RF system according to any one of claims 1 to 5, applied to an electronic device, wherein the electronic device comprises a main board, the main board comprises a first area and a second area which are adjacent to each other, the RF transceiver, the transmitting module and the SPNT switch are disposed in the first area, and the N receiving modules, the N antennas and the N SP2T switches are disposed in the second area.

7. The RF system according to any of claims 1 to 6, wherein the RF system is configured to control at least one of N receiving paths between N receiving ends of the RF transceiver and the N antennas to be conducted through the N SP2T switches, and receive a signal through at least one of the N antennas, so as to implement a receiving function of the RF system.

8. The radio frequency system according to any of claims 1 to 6, wherein the radio frequency system is configured to control, through the N SP2T switches, conduction of N receiving paths between N receiving ends of the radio frequency transceiver and the N antennas, and receive signals through the N antennas, so as to implement a downlink carrier aggregation function of the radio frequency system.

9. The RF system according to any of claims 1 to 7, further configured to control the transmitting end of the RF transceiver to conduct with the first antenna through the SPNT switch and the N SP2T switches, and transmit a signal through the first antenna to implement a transmitting function of the RF system.

10. An electronic device, comprising a baseband chip and the radio frequency system according to any one of claims 1 to 9, wherein the baseband chip is configured to transmit a baseband signal to the radio frequency system, and the radio frequency system modulates the baseband signal and then transmits the modulated baseband signal; the baseband chip is also used for receiving and processing the demodulated baseband signal from the radio frequency system.