CN114759963B

CN114759963B - SRS polling method, radio frequency circuit and electronic equipment

Info

Publication number: CN114759963B
Application number: CN202210677050.8A
Authority: CN
Inventors: 何杏波; 程黎辉; 关亚东
Original assignee: Longcheer Electronics Huizhou Co Ltd
Current assignee: Longcheer Electronics Huizhou Co Ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-09-09
Anticipated expiration: 2042-06-16
Also published as: CN114759963A

Abstract

The application provides an SRS polling method, a radio frequency circuit and an electronic device, wherein the radio frequency circuit comprises: the radio frequency transceiver, the filter circuit, the LPAMID integrated circuit, the 2 LFEM integrated circuits, the 4 antennas and the 4 radio frequency test seats can improve the sensitivity of each SRS channel when the radio frequency circuit carries out SRS polling by optimizing the circuit structure of the radio frequency circuit, so that the area/cost/performance of the radio frequency circuit and the electronic equipment where the radio frequency circuit is located are more excellent in synthesis.

Description

SRS polling method, radio frequency circuit and electronic equipment

Technical Field

The present invention relates to communications technologies, and in particular, to a Sounding Reference Signal (SRS) polling method, a radio frequency circuit, and an electronic device.

Background

With the rapid development of mobile communication technology, electronic devices such as mobile phones, notebooks, tablet computers and the like have more and more functions, and higher requirements are put forward on hardware of the electronic devices. For example, a terminal adopting 5G (5 th-Generation) communication technology is simultaneously provided with 4 antennas, and 4 antenna terminal devices can poll and transmit SRS signals on multiple antennas, so that the terminal device can determine the communication rate on each antenna, thereby improving the downlink data throughput capability of the terminal.

More discrete devices are arranged in the existing radio frequency circuit, for example, more SPDT and LFEM switches need to be matched in the radio frequency circuit. The insertion loss of the SRS link of the radio frequency circuit is larger, and the sensitivity of each SRS link when the radio frequency circuit carries out SRS polling is reduced. In addition, the swing area of the radio frequency circuit is large when the radio frequency circuit is implemented on the PCB, so that the cost of the PCB is high, the cost performance of the radio frequency circuit and the electronic equipment where the radio frequency circuit is located is finally reduced, and the product competitiveness of the electronic equipment produced by a manufacturer is low.

Disclosure of Invention

The application provides an SRS polling method, a radio frequency circuit and electronic equipment, and the embodiment of the application can improve the sensitivity of each SRS channel when the radio frequency circuit carries out SRS polling by optimizing the structure of the radio frequency circuit, so that the area/cost/performance of the radio frequency circuit and the electronic equipment where the radio frequency circuit is located are comprehensive and better.

A first aspect of the present application provides a radio frequency circuit, comprising: the device comprises a radio frequency transceiver, a filter circuit, an LPAMID integrated circuit, 2 LFEM integrated circuits, 4 antennas and 4 radio frequency test seats; the 4 antennas are used for polling and sending Sounding Reference Signals (SRS); the filter circuit is connected with the LPAMID integrated circuit, and the 4 antennas are respectively connected with the LPAMID integrated circuit through the 4 radio frequency test seats; the LPAMID integrated circuit is respectively connected with the 2 LFEM integrated circuits; the LPAMID integrated circuit and the 2 LFEM integrated circuits are respectively connected with the radio frequency transceiver; the radio frequency transceiver polls the LPAMID integrated circuit to send a transmission signal, and the LPAMID integrated circuit polls the transmission signal to be sent to the 4 antennas; when the LPAMID integrated circuit receives a received signal through one of the 4 antennas, the LPAMID integrated circuit transmits the received signal to the rf transceiver, or transmits the received signal to the LFEM integrated circuit, so that the LFEM integrated circuit transmits the received signal to the rf transceiver.

In an embodiment of the first aspect of the present application, the LPAMID integrated circuit includes: the power amplifier comprises a first switch, a power amplifier, a first filter, a second switch, a first low noise amplifier and a second low noise amplifier; the second switch includes: the first contact, the second contact, the third contact and the fourth contact are arranged at the first end, and the fifth contact, the sixth contact, the seventh contact and the eighth contact are arranged at the second end; the first contact is connected with a first end of the first switch through the first filter, a second end of the first switch is connected with an output end of the power amplifier, an input end of the power amplifier is connected with the radio frequency transceiver, a third end of the first switch is connected with an input end of the first low noise amplifier, and an output end of the first low noise amplifier is connected with the radio frequency transceiver; the first end and the second end of the first switch are conducted, or the first end and the third end of the first switch are conducted; the second contact and the third contact are respectively connected with the LFEM integrated circuit; the fourth contact is connected with a first end of the filter circuit, a second end of the filter circuit is connected with an input end of the second low-noise amplifier, and an output end of the second low-noise amplifier is connected with the radio frequency transceiver; the fifth contact, the sixth contact, the seventh contact and the eighth contact are respectively connected with the 4 antennas through the radio frequency test socket.

In an embodiment of the first aspect of the present application, the LFEM integrated circuit includes: a third low noise amplifier and a second filter; the first end of the second filter is connected with the LPAMID integrated circuit, the second end of the second filter is connected with the input end of the third low-noise amplifier, and the output end of the third low-noise amplifier is connected with the radio frequency transceiver.

In an embodiment of the first aspect of the present application, the method further includes: the fifth contact is connected with a first antenna in the 4 antennas through the first diplexer and a first radio frequency test seat; and the sixth contact is connected with a second antenna in the 4 antennas through the second diplexer and the second radio frequency test socket.

In an embodiment of the first aspect of the present application, the method further includes: a first DP4T switch, a first end of which is connected to the first antenna through the first rf test socket, a second end of which is connected to the second antenna through the second rf test socket, a third end of which is connected to the first diplexer, and a fourth end of which is connected to the second diplexer; and a second DP4T switch, wherein a first end is connected to a third antenna of the 4 antennas through a third RF test socket, a second end is connected to a fourth antenna of the 4 antennas through a fourth RF test socket, and a third end and a fourth end of the second RF test socket are connected to the LPAMIDD integrated circuit.

In an embodiment of the first aspect of the present application, the method further includes: a baseband processor for controlling a conduction state between the contact of the first end and the contact of the second end of the second switch.

In an embodiment of the first aspect of the present application, the baseband processor is configured to, when a received signal is received through the third antenna or the fourth antenna and the received signal is not received through the first antenna and the second antenna at the same time, send the received signal of the third antenna or the fourth antenna to the radio frequency transceiver through the filter circuit and the second low noise amplifier, or send the received signal of the third antenna or the fourth antenna to the radio frequency transceiver through the first filter, the first switch, and the first low noise amplifier.

In an embodiment of the first aspect of the present application, the antenna includes: a 5G PRX antenna, a 5G MOMI antenna, a 5G DRX antenna, or a 5G DRX MIMO antenna; the antennas include a transmit antenna and a receive antenna.

A second aspect of the application provides an electronic device comprising a radio frequency circuit as claimed in any one of the first aspects of the application.

A third aspect of the present application provides an SRS polling method for controlling a radio frequency circuit according to any of the first aspects of the present application, including: the radio frequency transceiver simultaneously sends one or two transmit signals to the LPAMID integrated circuit; the LPAMID integrated circuit polls and sends the transmitting signals through the antennas corresponding to the transmitting signals in the 4 antennas; the LPAMID integrated circuit obtains received signals through the antennas corresponding to the transmitting signals in the 4 antennas respectively, polls the received signals to be sent to the radio frequency transceiver, and sends the received signals to the processor through the radio frequency transceiver, so that the processor judges the antennas to be used in the 4 antennas according to the strength of all the received signals obtained after the 4 antennas send the transmitting signals.

In summary, according to the SRS polling method, the radio frequency circuit and the electronic device, by optimizing the circuit structure of the radio frequency circuit, the sensitivity of each SRS channel in SRS polling of the radio frequency circuit is improved, so that the area, cost and performance of the radio frequency circuit and the electronic device in which the radio frequency circuit is located are integrated and better.

Drawings

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

Fig. 1 is a schematic structural diagram of an embodiment of an electronic device applied in the present application;

FIG. 2 is a schematic diagram of a prior art RF circuit;

fig. 3 is a schematic structural diagram of an embodiment of a radio frequency circuit provided in the present application;

fig. 4 is a schematic structural diagram of an LPAMID integrated circuit provided in the present application;

fig. 5 is a schematic structural diagram of an LFEM integrated circuit provided in the present application;

fig. 6 is a schematic structural diagram of another embodiment of a radio frequency circuit provided in the present application;

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

fig. 8 is a schematic diagram of a communication mode of the radio frequency circuit according to the present application to implement 1T 4R;

fig. 9 is a schematic diagram of a communication mode of the radio frequency circuit according to the present application to implement 2T 4R.

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 making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The application provides a Radio Frequency (RF) circuit, an electronic device and a Sounding Reference Signal (SRS) polling method, which can be applied to electronic devices such as mobile phones, electronic devices, tablet computers or 5G modules. Before formally introducing the embodiments of the present application, an electronic device such as a mobile phone, an electronic device, a tablet computer, or a 5G module applied in the present application will be described with reference to a structure of an electronic device disclosed in the prior art shown in fig. 1.

Fig. 1 is a schematic structural diagram of an embodiment of an electronic device applied in the present application. Taking the electronic device as a mobile phone as an example, the mobile phone 11 includes: radio frequency circuit 110, power supply 120, processor 130, memory 140, input unit 150, display unit 160, sensor 170, audio circuit 180, and wireless fidelity (WiFi) module 190. It will be appreciated that the handset configuration shown in fig. 1 is not intended to be limiting, and may include more or fewer components than shown, or some of the components may be combined, or a different arrangement of components. The main components involved in this application include the radio frequency circuitry 110, the processor 130, the WiFi module 190 and a software design running on an operating system on the processor 130. The respective constituent elements of the cellular phone 11 will be specifically described below with reference to fig. 1.

The rf circuit 110 may be configured to receive and transmit information or receive and transmit signals during a call, for example, after the rf circuit 110 receives downlink information of a base station, the downlink information is transmitted to the processor 130, and the processor 130 processes the downlink information; in addition, the radio frequency circuit 110 may also communicate with networks and other devices via wireless communication. The memory 140 can be used for storing software programs and modules, and the processor 130 executes various functional applications and data processing of the mobile phone 11 by running the software programs, modules, operating system firmware codes, and the like stored in the memory 140, such as the execution of functions of the receiving module, the sending module, the processing module, and the like in the communication device according to the above embodiment. The memory 140 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a network access function, a shared data exposure function, and the like), and the like; the storage data area may store data (such as shared data, shared key, etc.) created according to the use of the cellular phone 11, and the like. Further, the memory 140 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. The input unit 150 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone 11. The display unit 160 may be used to display information input by the user or information provided to the user, and various menus of the cellular phone 11. The display unit 160 may include a display panel 161, and the display panel 161 may be alternatively configured in the form of an LCD, an OLED, or the like. Further, the touch panel 151 may cover the display panel 161, and when the touch panel 151 detects a touch operation thereon or nearby, the touch panel transmits the touch operation to the processor 130 to determine the type of the touch event, and then the processor 130 provides a corresponding visual output on the display panel 161 according to the type of the touch event. The processor 130 is a control center of the mobile phone 11, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone 11 and processes data by operating or executing software programs and/or modules stored in the memory 140 and calling data stored in the memory 140, thereby implementing various services based on the mobile phone. WiFi belongs to short-distance wireless transmission technology, and the mobile phone 11 can help the user to receive and send e-mail, browse web pages, access streaming media, etc. through the WiFi module 190, it provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 190, it is understood that it does not belong to the essential constitution of the handset 11, and may be omitted entirely as needed within the scope not changing the essence of the invention. The handset 11 also includes a power supply 120 (e.g., a battery) for powering the various components, which may be logically coupled to the processor 130 via a power management system that may be used to manage charging, discharging, and power consumption. Although not shown, the mobile phone 11 may further include a camera, a bluetooth module, and the like, which will not be described herein.

It should be noted that the electronic device shown in fig. 1 is only an example, and the radio frequency circuit provided in this application may also be applied to other radio frequency devices with 5G, electronic devices or mobile terminal devices, such as a 5G communication module, a 5G mobile phone, a 5G tablet computer, a 5G base station, a 5G notebook computer, a wearable device, and the like.

With the rapid development of mobile communication technology, electronic devices such as mobile phones, electronic devices, tablet computers or 5G modules have more and more functions, and higher requirements are put forward on hardware of the electronic devices. For example, 5G (5 th-Generation) communication technology requires 4 antennas to be installed on a terminal device at the same time, so as to increase the downlink communication rate of a mobile phone through more antennas.

In a specific communication scenario, a mobile phone needs to detect a Sounding Reference Signal (SRS), which may be called polling. The SRS can be understood as a polling switch, and when the mobile phone carries the SRS polling technology, the terminal device can report Received Signal Strength (RSSI) in turn on a plurality of antennas arranged therein. Then, the terminal equipment is judged which antenna environment is good, and the transmitting antenna is switched to the antenna. That is, the terminal device may determine which antenna environment is good according to the RSSI value of the received signal by polling and transmitting the SRS probe signal through the plurality of antennas. If the RSSI signal of the first antenna is good, the transmitting antenna is cut to the first antenna; if the RSSI signal of the second antenna is good, the transmitting antenna is cut to the second antenna, and the third antenna and the fourth antenna are the same. If the RSSI signal of the original transmitting antenna is not degraded, the transmitting antenna can be maintained in a non-switching state. In a specific implementation scenario, for example, when the environment of the antenna of the mobile phone is changed, if the original antenna with good performance is blocked by hand, the transmitting antenna may be switched again, so that more accurate data transmission may be performed. After the terminal equipment introduces the SRS antenna polling function, under the SRS mode, more antennas participate in detection, more accurate signals are obtained, and therefore the downlink data throughput capacity is improved.

In the prior art, the radio frequency circuit in the terminal device also needs to be configured accordingly to implement SRS polling, for example, fig. 2 is a schematic diagram of a circuit structure of a radio frequency circuit in the prior art, and the radio frequency circuit shown in fig. 2 can be applied to electronic devices such as the terminal device shown in fig. 1. Specifically, the radio frequency circuit shown in fig. 2 includes: a radio frequency Transceiver (Transceiver), an LPAMID integrated circuit (specifically, an integrated chip integrated with a radio frequency Switch, a low noise amplifier, a filter, and a multi-mode multi-band PA), 2 LFEM integrated circuits (specifically, an integrated chip integrated with a radio frequency Switch, a low noise amplifier, and a filter), 2 Single-Pole Double-Throw (SPDT) switches, 2 diplexers (diplexers), 4 radio frequency test sockets (RF switches), and 4 antennas. The signal sent by the radio frequency transceiver through the LPAMID integrated circuit is marked as TX; recording a signal which is received by the first antenna and transmitted to the radio frequency transceiver through the first radio frequency test seat, the first diplexer and the LPAMID integrated circuit as RX 1; recording a signal which is received by the second antenna and transmitted to the radio frequency transceiver through the second radio frequency test seat, the second diplexer and the LPAMID integrated circuit as RX 2; the signal which is received by the third antenna and transmitted to the radio frequency transceiver through the third radio frequency test seat, the first SPDT and the first LFEM integrated circuit is recorded as RX 3; the signal received by the fourth antenna and transmitted to the rf transceiver through the fourth rf test socket, the second SPDT and the second LFEM ic is denoted as RX 4.

However, as shown in fig. 2, the radio frequency circuit has only two output interfaces due to the limitation of the internal structure of the LPAMID, and a filter is not yet provided on a path of one of the output interfaces, so that more SPDT switches (specifically, the first SPDT and the second SPDT in fig. 2) and LFEM switches need to be provided between the LPAMID integrated circuit and the antennas (specifically, the third antenna and the fourth antenna in fig. 2), which brings larger insertion loss to the SRS link of the radio frequency circuit, thereby reducing the sensitivity of each SRS link when the radio frequency circuit performs SRS polling. In addition, the swing area of the radio frequency circuit is large when the radio frequency circuit is implemented on the PCB, so that the cost of the PSB is high, the cost performance of the radio frequency circuit and the electronic equipment where the radio frequency circuit is located is finally reduced, and the product competitiveness of the electronic equipment produced by a manufacturer is low

Therefore, in order to solve the problem existing in the radio frequency circuit shown in fig. 2, the present application provides a radio frequency circuit, which can reduce the number of SPDT switches and LFEMs arranged in the structure of the radio frequency circuit by optimizing the structure of the radio frequency circuit, and improve the sensitivity of each SRS channel when the radio frequency circuit performs SRS polling, so that the area/cost/performance of the radio frequency circuit and the electronic device where the radio frequency circuit is located are more excellent. The technical solution of the present application will be described in detail below with specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 3 is a schematic structural diagram of an embodiment of a radio frequency circuit provided in the present application, and the radio frequency circuit shown in fig. 3 may be applied to the electronic device shown in fig. 1. The radio frequency circuit shown in fig. 3 includes: the test system comprises a radio frequency transceiver, a filter circuit, an LPAMID integrated circuit, 2 LFEM integrated circuits, 4 antennas and 4 radio frequency test seats. The 4 antennas are used for polling and transmitting sounding reference signals SRS, and the filter circuit is connected with the LPAMID integrated circuit.

In the example shown in fig. 3, 4 antennas are denoted as a first antenna, a second antenna, a third antenna, and a fourth antenna. When the handset is a handset supporting 5G communication, the 4 antennas may include: one or more of a 5G PRX (Primary Receive) antenna, a 5G PRX MIMO (Primary Receive Multiple Input Multiple Output) antenna, a 5G DRX (Diversity Receive) antenna, or a 5G DRX MIMO (Diversity Receive Multiple Output) antenna, where the 4 antennas may be the same, partially the same, or different. Wherein PRX antenna represents a main set antenna, PRX MIMO antenna represents a main set MIMO antenna, DRX antenna represents a diversity antenna, and DRX MIMO represents a diversity MIMO antenna. The antennas include a transmit antenna and a receive antenna. The MIMO antenna technology refers to a transmission technology that transmits signals using multiple antennas and receives signals using multiple antennas, so as to transmit different information on the same carrier within the same frequency band. This technique is also known as spatial multiplexing, with separate feeds for each antenna. A 5G technology handset will add more MIMO antennas, and downlink 4 x4 MIMO technology will be a strong requirement for a 5G technology handset.

The 4 antennas are respectively connected with the LPAMID integrated circuit through 4 radio frequency test seats. In some embodiments, the first antenna and the second antenna may also be connected to the LPAMID through a Diplexer (Diplexer). For example, in the example shown in fig. 3, the first antenna is connected to the d-interface of the LPAMID integrated circuit through the first rf test socket and the first diplexer; the second antenna is connected with an e interface of the LPMID integrated circuit through a second radio frequency test seat and a second diplexer through the second radio frequency test seat and the second diplexer; the third antenna is connected with an f interface of the LPMID integrated circuit through a third radio frequency test seat; and the fourth antenna is connected with the g interface of the LPMID integrated circuit through a fourth radio frequency test seat.

The h interface of the LPAMID integrated circuit is connected to the first LFEM integrated circuit, and the i interface of the LPAMID integrated circuit is connected to the second LFEM integrated circuit. The interface a, the interface b and the interface c of the LPAMID integrated circuit are connected with a radio frequency transceiver, and the first LFEM integrated circuit and the second LFEM integrated circuit are also respectively connected with the radio frequency transceiver.

Fig. 4 is a schematic structural diagram of an LPAMID integrated circuit according to the present invention, where the LPAMID integrated circuit shown in fig. 4 can be applied to the radio frequency circuit shown in fig. 3. As shown in fig. 4, the LPAMID integrated circuit includes: a first switch, a Power Amplifier (PA), a first filter, a second switch, a first Low Noise Amplifier (LNA) 1, and a second LNA 2.

In some embodiments, the rf circuit shown in fig. 4 further includes a filter circuit, both ends of which are connected to the second switch in the LPAMID integrated circuit and the second low noise amplifier LNA 2.

In some embodiments, the second switch typically includes, but is not limited to, 8 contacts. In the embodiment of the present application, the second switch includes 8 contacts as an example. Wherein the first contact t1, the second contact t2, the third contact t3 and the fourth contact t4 are arranged at a first end of the second switch, and the fifth contact t5, the sixth contact t6, the seventh contact t7 and the eighth contact t8 are arranged at a second end of the second switch. The second switch may control one or more contacts of the first end and one or more contacts of the second end to be turned on, a specific implementation of the second switch is not limited in this embodiment, and a specific structure of the second switch may refer to a structure of a switch capable of turning on the first end contact and the second end contact in the prior art.

The first contact t1 is connected to the first terminal k of the first switch through the first filter, the second terminal j of the first switch is connected to the output terminal of the power amplifier PA, and the input terminal of the power amplifier PA is connected to the a interface of the LPAMID integrated circuit, so as to be connected to the radio frequency transceiver. The third terminal l of the first switch is connected to the input terminal of the first low noise amplifier LNA1, and the output terminal of the first low noise amplifier LNA1 is connected to the b interface of the LPAMID integrated circuit, thereby being connected to the radio frequency transceiver. The first switch is a selection switch, and can select the first terminal k and the second terminal j to be conducted or select the first terminal k and the third terminal l to be conducted. The second contact t2 is connected to the h-interface of the LPAMID integrated circuit and the third contact t3 is connected to the i-interface of the LPAMID integrated circuit. The fourth contact t4 is connected to a first terminal of the filter circuit, a second terminal of the filter circuit is connected to an input terminal of the second low noise amplifier LNA2, and an output terminal of the second low noise amplifier is connected to the c-interface of the LPAMID integrated circuit, so as to be connected to the radio frequency transceiver. The fifth contact t5 is connected with the d interface of the LPAMID integrated circuit, so that the first antenna is connected with the first radio frequency test socket through the first diplexer; the sixth contact t6 is connected with the e interface of the LPAMID integrated circuit, so that the second antenna is connected with the second radio frequency test socket through the second diplexer; the seventh contact t7 is connected with the f interface of the LPAMID integrated circuit, so that the third antenna is connected through the third radio frequency test socket; the eighth contact t8 connects to the g interface of the LPAMID integrated circuit and thus to the fourth antenna through the fourth rf test socket.

Fig. 5 is a schematic structural diagram of an LFEM integrated circuit provided in the present application, and the LFEM integrated circuit shown in fig. 5 may be applied to the rf circuit shown in fig. 3, and is used as a first LFEM integrated circuit or a second LFEM integrated circuit. As shown in fig. 5, the LFEM integrated circuit includes: a third low noise amplifier LNA3 and a second filter. The first end of the second filter is connected with the LPAMID integrated circuit, the second end of the second filter is connected with the input end of a third low noise amplifier LNA3, and the output end of the third low noise amplifier LNA3 is connected with the radio frequency transceiver. For example, in a first LFEM integrated circuit, the first end of the second filter is connected to the h-interface of the LPAMID integrated circuit, in a second LFEM integrated circuit, the first end of the second filter is connected to the i-interface of the LPAMID integrated circuit, and so on.

Based on the radio frequency circuit provided in the foregoing embodiment of the present application, the present application further provides an SRS polling method, which can be applied to an electronic device shown in fig. 1, where the electronic device can perform the SRS polling method, the electronic device can use the radio frequency circuit provided in fig. 3 to perform SRS polling, and the radio frequency circuit specifically includes an LPAMID integrated circuit shown in fig. 4 and an LFEM integrated circuit shown in fig. 5. Specifically, the SRS polling method includes: the radio frequency transceiver simultaneously sends one or two transmit signals TX to the LPAMID integrated circuit. Then, the LPAMID integrated circuit polls the transmit signal through the antenna of the 4 antennas corresponding to the transmit signal. Finally, the LPAMIDD integrated circuit obtains received signals through the antenna corresponding to the transmitted signals in the 4 antennas, polls the received signals to be sent to the radio frequency transceiver, and sends the received signals to the processor through the radio frequency transceiver, so that the processor sends all the received signals obtained after the transmitted signals are sent through the 4 antennas, and then judges the antenna to be used in the 4 antennas according to the strength of all the received signals.

In some embodiments, when performing SRS polling, the SRS polling transmission order of the transmission antennas may be adjusted according to actual situations, for example, a first transmission antenna transmits a first SRS sounding signal, then a second transmission antenna transmits a second SRS sounding signal, a third transmission antenna transmits a third SRS sounding signal, and finally a fourth transmission antenna transmits a fourth SRS sounding signal. For another example, the first transmitting antenna transmits the second SRS sounding signal, the second transmitting antenna transmits the first SRS sounding signal, the third transmitting antenna transmits the third SRS sounding signal, and the fourth transmitting antenna transmits the fourth SRS sounding signal; or the combination of first transmitting antenna transmitting the first SRS sounding signal, then the second transmitting antenna transmitting the third SRS sounding signal, the third transmitting antenna transmitting the second SRS sounding signal, and finally the fourth transmitting antenna transmitting the fourth SRS sounding signal.

The following describes the procedure of the transmission signal TX transmitted by the rf circuit, and the reception signals RX1, RX2, RX3 and RX4 received by the 4 antennas, with reference to the rf circuit provided in fig. 3, the LPAMID integrated circuit provided in fig. 4 and the LFEM integrated circuit provided in fig. 5.

For the transmit signal TX, the radio frequency transceiver first sends the transmit signal TX to the a-interface of the LPAMID integrated circuit. At this time, the first terminal k and the second terminal j of the first switch of the LPAMID integrated circuit are turned on, and any one of the first t1 contact and the second terminal of the second switch is turned on. The transmission signal TX is output from any one of the d interface, the e interface, the f interface, and the g interface of the LPAMID integrated circuit through the second switch after being processed by the power amplifier PA, the first switch, and the first filter.

In some embodiments, the rf circuit may further include a baseband processor for controlling the conduction state of the second switch according to a control signal sent by the rf transceiver to the LPAMID integrated circuit. The baseband processor may be located external to the LPAMID integrated circuit (such as the example shown in fig. 4), or internal to the LPAMID integrated circuit. The baseband processor may control the first contact t1 and the fifth contact t5 of the second switch to be turned on, so that the LPAMID integrated circuit outputs the transmission signal TX, and the transmission signal TX is transmitted from the first antenna after being processed by the first diplexer and the first rf test socket. The baseband processor may control the first contact t1 and the sixth contact t6 of the second switch to be turned on, so that the LPAMID integrated circuit outputs the transmission signal TX, and the transmission signal TX is transmitted from the second antenna after being processed by the second diplexer and the second rf test socket. The baseband processor may control the first contact t1 and the seventh contact t7 of the second switch to be turned on, so that the LPAMID integrated circuit outputs the transmission signal TX, and the transmission signal TX is processed by the third rf test socket and then transmitted from the third antenna. The baseband processor may control the first contact t1 and the eighth contact t8 of the second switch to be turned on, so that the LPAMID integrated circuit outputs the transmission signal TX, and the transmission signal TX is processed by the fourth rf test socket and then transmitted from the fourth antenna.

For the received signal RX, when the LPAMID integrated circuit receives the received signal via the first antenna or the second antenna, the LPAMID integrated circuit transmits the received signal RX to the rf transceiver. When the LPAMID integrated circuit receives a received signal through the third antenna or the fourth antenna, the LPAMID integrated circuit transmits the received signal RX to the corresponding LFEM integrated circuit, so that the LFEM integrated circuit transmits the received signal RX to the radio frequency transceiver.

For example, a received signal RX1 received by the first antenna is sent to the LPAMID integrated circuit through the first rf test socket and the first diplexer, at this time, the baseband processor controls the first contact t1 and the fifth contact t5 of the second switch of the LPAMID integrated circuit to be turned on, the first terminal k and the third terminal l of the first switch are turned on, and the received signal RX1 is output from the b interface to the rf transceiver for subsequent processing after being processed by the first filter and the first switch and the first LNA 1. The received signal RX2 received by the second antenna is sent to the LPAMID integrated circuit through the second rf test socket and the second diplexer, at this time, the baseband processor controls the fourth contact t4 and the sixth contact t6 of the second switch of the LPAMID integrated circuit to be turned on, and the received signal RX2 is output from the c interface to the rf transceiver for subsequent processing after being processed by the filter circuit and the second low noise amplifier LNA 2. The receiving signal RX3 received by the third antenna is sent to the LPAMID integrated circuit through the third rf test socket, at this time, the baseband processor controls the second contact t2 and the seventh contact t7 of the second switch of the LPAMID integrated circuit to be turned on, and the receiving signal RX3 is input to the first LFEM integrated circuit through the second switch, processed by the first LFEM integrated circuit, and then output to the rf transceiver for subsequent processing. A receiving signal RX4 received by the fourth antenna is sent to the LPAMID integrated circuit through the fourth rf test socket, at this time, the baseband processor controls the third contact t3 and the eighth contact t8 of the second switch of the LPAMID integrated circuit to be turned on, and the receiving signal RX4 is input to the second LFEM through the second switch, processed by the second LFEM, and output to the rf transceiver for subsequent processing.

In summary, on the basis of implementing the SRS polling function, compared with the radio frequency circuit in the prior art in fig. 2, the radio frequency circuit provided in the embodiment of the present application omits an SPDT switch separately arranged in the radio frequency circuit, and reduces the number of more separate devices arranged in the radio frequency circuit. Therefore, the radio frequency circuit provided by the embodiment of the application can improve the sensitivity of each SRS channel when the radio frequency circuit carries out SRS polling by optimizing the structure of the radio frequency circuit, so that the area/cost/performance of the radio frequency circuit and the electronic equipment where the radio frequency circuit is located are comprehensively better.

Meanwhile, when the radio frequency circuit provided by the embodiment of the application is realized on a Printed circuit board (PCB for short), because a discrete SPDT switch and an LFEM device are omitted, only one filter circuit is added, and other devices are not changed, the swing area of the radio frequency circuit on the PCB can be reduced, the production and design cost is reduced, and the radio frequency circuit is easy to use, improve and popularize on the existing radio frequency circuit. (the PCB area of the added filter is smaller, compared with the original 2 SPDT switches, the whole PCB ornament area of the radio frequency circuit is greatly reduced) and, the radio frequency circuit provided by the embodiment of the application is more flexible in design, lower in price, fewer in required devices and higher in integration level, compared with the design of discrete devices, the receiving sensitivity performance of each SRS channel is better, so that more accurate data transmission experience is brought, and the filter also has more remarkable economic value in the environment of intense price competition of electronic equipment.

It should be noted that, as in the example of the radio frequency circuit provided in fig. 3, the electronic device includes 4 antennas as an example, it can be understood that a greater number of antennas may be included in the radio frequency circuit, and in this case, only the corresponding LFEM integrated circuit needs to be added. For example, fig. 6 is a schematic structural diagram of another embodiment of the rf circuit provided in the present application, and a more general model of the rf circuit shown in fig. 6 includes: n antennas, a radio frequency transceiver, a LPAMID integrated circuit, N-2 LFEM integrated circuits and a radio frequency connection circuit. The radio frequency connection circuit can comprise a radio frequency test socket, a diplexer, a radio frequency switch and the like.

Fig. 7 is a schematic structural diagram of another embodiment of the radio frequency circuit provided in the present application, and the radio frequency circuit shown in fig. 7 further includes, based on fig. 3: a first DP4T switch and a second DP4T switch. The first end of the first DP4T switch is connected to the first antenna through the first rf test socket, the second end is connected to the second antenna through the second rf test socket, the third end is connected to the d interface of the LPAMID integrated circuit through the first diplexer, and the fourth end is connected to the e interface of the LPAMID integrated circuit through the second diplexer. The first end of the second DP4T switch is connected to the third antenna through the third rf test socket, the second end is connected to the fourth antenna through the fourth rf test socket, the third end is connected to the f-interface of the LPAMID integrated circuit, and the fourth end is connected to the g-interface of the LPAMID integrated circuit. In some embodiments, the DP4T (Double-polar Four-thread Switch) Switch shown in FIG. 7 may also be replaced with a 3P3T (Three-polar Three-thread Switch) Switch, an XPXT Switch such as an SPDT RF Switch, or the like.

Fig. 8 is a schematic view of a communication mode of the radio frequency circuit implementing 1T4R, where as shown in fig. 8, a 1T4R specifically indicates that in an SA (standard: independent networking) mode, the electronic device only supports uplink single transmission, that is, one of 4 antennas can be selected as a transmitting antenna at the same time, 4 antennas are all used as receiving antennas, and SRS detection signals are sent in turn, so as to implement a 1-transmit-4-receive operating mode, and a radio frequency transceiver can send one transmitting signal and receive four receiving signals at the same time; in the NSA (Non-standard: Non-independent networking) mode, the electronic device can also support 1T4R for 4-day wire routing. For example, in the state shown in fig. 8, the received signal RX4 received by the fourth antenna may be transmitted through the second DP4T switch, the received signal RX3 received by the third antenna may be transmitted through the second DP4T switch, the received signal RX2 received by the second antenna may be transmitted through the first DP4T switch, the received signal RX1 received by the first antenna may be transmitted through the first DP4T switch, the transmit signal TX1 may be transmitted to the first antenna or the second antenna through the first DP4T switch, and so on.

Fig. 9 is a schematic view of a communication mode of the radio frequency circuit implementing 2T4R, where as shown in fig. 9, a 2T4R indicates that, in an SA (standard: independent networking) mode, the electronic device can support uplink dual transmission, that is, two antennas can be selected as transmitting antennas on 4 antennas at the same time, 4 antennas are all used as receiving antennas, and send SRS detection signals in turn, so as to implement a 2-transmit-4-receive operating mode, and a radio frequency transceiver can send two transmitting signals at the same time and receive four receiving signals at the same time; in the NSA (Non-standard: Non-independent networking) mode, the electronic device can also support 2T4R for 4 days of wire routing. For example, in the state shown in fig. 8, the received signal RX4 received by the fourth antenna may be transmitted through the second DP4T switch, the received signal RX3 received by the third antenna may be transmitted through the second DP4T switch, the received signal RX2 received by the second antenna may be transmitted through the first DP4T switch, the received signal RX1 received by the first antenna may be transmitted through the first DP4T switch, the transmit signal TX1 may be transmitted through the first DP4T switch to the first antenna or the second antenna, the transmit signal TX2 may be transmitted through the second DP4T switch to the third antenna or the fourth antenna, and so on.

In some embodiments, the LPAMID integrated chips, DPDT switches, 3P3T switches, and DP4T switches or other switches provided herein, require less than 2us (for 30K _ SCS) switching time for their 5G radio frequency front end SRS polling scheme, and both the LPAMID and LFEM are integrated chips. Where SCS is the subcarrier spacing, with SCS =30Khz in 5G, the maximum supported bandwidth is 100M. The 5G radio frequency front end SRS polling signal in the SRS polling is usually referred to as n77/n78/n79 and other frequency bands in design, where the frequency band range of n77 is: 3300~4200MHz, the frequency range of n78 is 3300~3800MHz, the frequency range of n79 is: 4400 to 5000 MHz.

In some embodiments, based on the radio frequency circuit provided in this embodiment of the present application, when performing SRS polling, if the received signal RX3 is received through the third antenna or the received signal RX4 is received through the fourth antenna, and meanwhile the received signal is not received through the first antenna and the second antenna, the baseband processor of the radio frequency circuit may send the received signal RX3 or the received signal RX4 to the filter and the low noise amplifier inside the LPAMID integrated circuit for processing by controlling the second switch, and finally send the processed signal to the interface corresponding to the received signal RX3 or the received signal RX4 in the radio frequency transceiver. In this process, the rf circuit does not process the RX signal RX3 or RX signal RX4 using the LFEM integrated circuit. Therefore, the energy consumption of the radio frequency circuit is saved, and in some cases, the first LFEM integrated circuit and the second LFEM integrated circuit do not need to be powered, so that the energy consumption is further reduced. And the received signal is processed using fewer integrated devices, the stability of the received signal processing can be enhanced compared to using more discrete devices, etc. In some embodiments, the baseband processor may determine that the received signal RX3 can be received through the third antenna or the received signal RX4 can be received through the fourth antenna without receiving the received signal through the first antenna and the second antenna at the same time according to the current communication environment (only the signal of the third antenna or the fourth antenna exists, but not the signal of the first antenna and the second antenna, etc.) or the communication time (only the signal of the third antenna or the fourth antenna exists, but not the signal of the first antenna and the second antenna, etc.).

Illustratively, taking the rf circuit shown in fig. 3 as an example, when the baseband processor determines that the received signal RX3 is received via the third antenna of the rf circuit and at the same time the received signals RX1 and RX2 are not received via the first antenna and the second antenna, the baseband processor may control the rf circuit to process the received signal RX3 by processing the received signal RX1 or the received signal RX 2. For example, the baseband processor of the radio frequency circuit may control the first contact t1 and the seventh contact t7 of the second switch to be conductive, and control the first terminal k and the third terminal l of the first switch to be conductive. The reception signal RX3 is output from the b interface after being processed by the first filter, the first switch, and the first low noise amplifier LNA 1. A switch may be further disposed between the b interface of the LPAMID integrated circuit and the output terminal of the first LFEM integrated circuit, when the switch is turned on, a received signal RX3 output by the b interface is sent to the output terminal of the first LFEM integrated circuit and is sent to the radio frequency transceiver, and the radio frequency transceiver can perform subsequent processing according to the received signal RX 3. Or, the baseband processor of the radio frequency circuit may further control the fourth contact t4 and the seventh contact t7 of the second switch to be turned on, and the received signal RX3 is output from the c interface after being processed by the filter circuit and the second low noise amplifier LNA 2. A switch may also be disposed between the c interface of the LPAMID integrated circuit and the output terminal of the first LFEM integrated circuit, and when the switch is turned on, a receiving signal RX3 output by the c interface is sent to the output terminal of the first LFEM integrated circuit and sent to the radio frequency transceiver, and the radio frequency transceiver can perform subsequent processing according to the received receiving signal RX 3. The processing principle of the received signal RX4 of the fourth antenna is the same here and will not be described again. In this embodiment, the method can be applied to a situation that only the third antenna/the fourth antenna is used for communication, but the second antenna/the first antenna is not used for communication when only 1 or 2 antennas are used for communication in a communication scene in which the radio frequency circuit is normal. That is to say, in the embodiment of the present application, the baseband processor may control the radio frequency circuit to process the received signal RX3 or RX4 in a processing manner of the received signal RX1 or RX2, and may more intelligently select a manner with lower power consumption to process the received signal, so that power consumption of the radio frequency circuit and the electronic device where the radio frequency circuit is located may be reduced, and meanwhile, the baseband processor may also control the second switch to be turned on in different manners, which may also improve flexibility of configuration of the radio frequency circuit, and enrich an application scenario of the radio frequency circuit.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A radio frequency circuit, comprising:

the device comprises a radio frequency transceiver, a filter circuit, an LPAMID integrated circuit, 2 LFEM integrated circuits, 4 antennas and 4 radio frequency test seats; the 4 antennas are used for polling and sending Sounding Reference Signals (SRS); the filter circuit is connected with the LPAMID integrated circuit;

the 4 antennas are respectively connected with the LPAMID integrated circuit through the 4 radio frequency test seats; the LPAMID integrated circuit is respectively connected with the 2 LFEM integrated circuits; the LPAMID integrated circuit and the 2 LFEM integrated circuits are respectively connected with the radio frequency transceiver;

the radio frequency transceiver polls the LPAMID integrated circuit to send a transmission signal, and the LPAMID integrated circuit polls the transmission signal to be sent to the 4 antennas;

the LPAMID integrated circuit includes: the power amplifier comprises a first switch, a power amplifier, a first filter, a second switch, a first low-noise amplifier and a second low-noise amplifier;

the second switch includes: the first contact, the second contact, the third contact and the fourth contact are arranged at the first end, and the fifth contact, the sixth contact, the seventh contact and the eighth contact are arranged at the second end;

the first contact is connected with a first end of the first switch through the first filter, a second end of the first switch is connected with an output end of the power amplifier, an input end of the power amplifier is connected with the radio frequency transceiver, a third end of the first switch is connected with an input end of the first low noise amplifier, and an output end of the first low noise amplifier is connected with the radio frequency transceiver; the first end and the second end of the first switch are conducted, or the first end and the third end of the first switch are conducted;

the second contact is connected to a first LFEM integrated circuit of the 2 LFEM integrated circuits; the third contact is connected to a second LFEM integrated circuit of the 2 LFEM integrated circuits;

the fourth contact is connected with a first end of the filter circuit, a second end of the filter circuit is connected with an input end of the second low noise amplifier, and an output end of the second low noise amplifier is connected with the radio frequency transceiver;

the fifth contact, the sixth contact, the seventh contact and the eighth contact are respectively connected with the 4 antennas through the radio frequency test seat;

the LPAMID integrated circuit transmits a first receiving signal received by a first antenna in the 4 antennas to the first contact of the second switch through the fifth contact of the second switch, and transmits the first receiving signal to the radio-frequency transceiver from the first contact of the second switch through the third end of the first switch;

the LPAMID integrated circuit transmits a second receiving signal received by a second antenna in the 4 antennas to a fourth contact of the second switch through a sixth contact of the second switch, and transmits the second receiving signal to the radio frequency transceiver from the fourth contact of the second switch through a filter circuit;

the LPAMID integrated circuit transmitting a third receive signal received by a third antenna of the 4 antennas to a second contact of the second switch via a seventh contact of the second switch and transmitting the third receive signal from the second contact to the first LFEM integrated circuit, such that the first LFEM integrated circuit transmits the third receive signal to the radio frequency transceiver;

the LPAMID integrated circuit transmits a fourth receive signal received by a fourth antenna of the 4 antennas to the third contact of the second switch via the eighth contact of the second switch and transmits the fourth receive signal from the third contact to the second LFEM integrated circuit, such that the second LFEM integrated circuit transmits the fourth receive signal to the radio frequency transceiver.

2. The rf circuit of claim 1, wherein the first LFEM integrated circuit comprises: a third low noise amplifier and a second filter; the second LFEM integrated circuit includes: a third low noise amplifier and a second filter;

the first end of the second filter is connected with the LPAMID integrated circuit, the second end of the second filter is connected with the input end of the third low-noise amplifier, and the output end of the third low-noise amplifier is connected with the radio frequency transceiver.

3. The radio frequency circuit of claim 2, further comprising:

the fifth contact is connected with the first antenna through the first diplexer and a first radio frequency test seat;

and the sixth contact is connected with the second antenna through the second diplexer and the second radio frequency test seat.

4. The radio frequency circuit of claim 3, further comprising:

a first DP4T switch, a first end of which is connected to the first antenna through the first rf test socket, a second end of which is connected to the second antenna through the second rf test socket, a third end of which is connected to the first diplexer, and a fourth end of which is connected to the second diplexer;

and a second DP4T switch, wherein a first end is connected to the third antenna through a third RF test socket, a second end is connected to the fourth antenna through a fourth RF test socket, and the third end and the fourth end are connected to the LPAMIDD IC.

5. The radio frequency circuit of claim 4, further comprising:

a baseband processor for controlling a conduction state between the contact of the first end and the contact of the second end of the second switch.

6. The radio frequency circuit of claim 5,

the baseband processor is configured to send a received signal of the third antenna or the fourth antenna to the radio frequency transceiver through the filter circuit and the second low noise amplifier, or send the received signal of the third antenna or the fourth antenna to the radio frequency transceiver through the first filter, the first switch, and the first low noise amplifier, when the received signal is received through the third antenna or the fourth antenna and the received signal is not received through the first antenna and the second antenna at the same time.

7. The radio frequency circuit according to any one of claims 1 to 6,

the antenna includes: a 5G PRX antenna, a 5G MOMI antenna, a 5G DRX antenna, or a 5G DRX MIMO antenna;

the antenna includes: a transmit antenna and a receive antenna.

8. An electronic device comprising a radio frequency circuit as claimed in any one of claims 1 to 7.

9. A SRS polling method for controlling the radio frequency circuit according to any one of claims 1 to 7, comprising:

the radio frequency transceiver simultaneously sends one or two transmit signals to the LPAMID integrated circuit;

the LPAMID integrated circuit polls and sends the transmitting signals through the antennas corresponding to the transmitting signals in the 4 antennas;

the LPAMID integrated circuit obtains received signals through the antennas corresponding to the transmitting signals in the 4 antennas respectively, polls the received signals to be sent to the radio frequency transceiver, and sends the received signals to the processor through the radio frequency transceiver, so that the processor judges the antennas to be used in the 4 antennas according to the strength of all the received signals obtained after the 4 antennas send the transmitting signals.