Radio frequency system, control method thereof and terminal equipment

Abstract

The invention provides a radio frequency system, a control method thereof and terminal equipment, which are beneficial to saving the occupied area of devices and reducing power consumption. The radio frequency system comprises a first receiving path connected between a first antenna and a first radio frequency transceiver, the first receiving path is used for receiving a radio frequency signal of a first frequency band, and the first frequency band corresponds to a first network; the second receiving path is connected between a second antenna and a second radio frequency transceiver, the second receiving path is used for receiving a radio frequency signal of a second frequency band, and the second frequency band corresponds to a second network; wherein the first receiving path and the second receiving path share a low-noise amplifier in a time division multiplexing mode.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless communication technology, and more specifically, to a radio frequency system and a control method thereof, and a terminal device. Background Art

[0002] With the rapid development of mobile terminals, users have higher and higher requirements for the ability of terminal devices to support communication with multiple networks at the same time. For example, a user's mobile phone can communicate with a cellular network and wireless fidelity (Wifi) at the same time. Therefore, the RF system in the terminal device needs to meet the transmission requirements of different communication networks in different scenarios.

[0003] In order to meet the communication requirements of different networks, the RF system will design corresponding circuits for different networks, which will cause problems such as large occupied area and high power consumption. In actual operation, the communication requirements of different networks are different in different scenarios, and the circuits in the RF system working at the same time may also lead to performance redundancy. Summary of the invention

[0004] The embodiments of the present application provide a radio frequency system and a control method thereof, and a terminal device. The following introduces various aspects involved in the embodiments of the present application.

[0005] In a first aspect, a radio frequency system is provided, comprising: a first receiving path connected between a first antenna and a first radio frequency transceiver, the first receiving path being used to receive radio frequency signals in a first frequency band, the first frequency band corresponding to a first network; a second receiving path connected between a second antenna and a second radio frequency transceiver, the second receiving path being used to receive radio frequency signals in a second frequency band, the second frequency band corresponding to a second network; wherein the first receiving path and the second receiving path share a low noise amplifier in a time division multiplexing manner.

[0006] In a second aspect, a control method for a radio frequency system is provided, the radio frequency system comprising: a first receiving path connected between a first antenna and a first radio frequency transceiver; a second receiving path connected between a second antenna and a second radio frequency transceiver; the control method comprising: implementing a sharing of a low noise amplifier by the first receiving path and the second receiving path through time division multiplexing; wherein the first receiving path uses the first receiving path to receive a radio frequency signal of a first frequency band, the first frequency band corresponding to a first network; and uses the second receiving path to receive a radio frequency signal of a second frequency band, the second frequency band corresponding to a second network.

[0007] According to a third aspect, a terminal device is provided, comprising the radio frequency system as described in the first aspect.

[0008] According to a fourth aspect, a device is provided, comprising a processor, configured to call a program from a memory to execute the method according to the second aspect.

[0009] In a fifth aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the second aspect.

[0010] According to a sixth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method described in the second aspect.

[0011] The radio frequency system in the embodiment of the present application includes a first receiving path for receiving radio frequency signals of a first frequency band and a second receiving path for receiving radio frequency signals of a second frequency band. The first frequency band and the second frequency band correspond to different networks. The first receiving path and the second receiving path can share a low noise amplifier (LNA) by time division multiplexing. It can be seen that the two receiving paths working in different networks do not need to be respectively provided with LNA, which helps to reduce the area and power consumption occupied by circuit devices. Furthermore, when the communication demand of the first receiving path is reduced, LNA is used in the second receiving path, which can reduce the performance redundancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure shows a wireless communication system applied in an embodiment of the present application.

[0013] Figure 2 The figure shows a schematic diagram of the structure of a radio frequency system in the related art.

[0014] Figure 3 Shown is a schematic structural diagram of a radio frequency system provided in an embodiment of the present application.

[0015] Figure 4 Shown Figure 3 A schematic structural diagram of a possible implementation of a radio frequency system is shown.

[0016] Figure 5 Shown Figure 3 A schematic structural diagram of another possible implementation of the radio frequency system is shown.

[0017] Figure 6 Shown Figure 3 A schematic structural diagram of another possible implementation of the radio frequency system is shown.

[0018] Figure 7 Shown is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application.

[0019] Figure 8The figure is a flow chart of a control method of a radio frequency system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0021] First, the application scenarios involved in the embodiments of the present application are introduced.

[0022] Figure 1 1 is a schematic diagram of a wireless communication system used in an embodiment of the present application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographical area, and may communicate with the terminal device 120 located in the coverage area.

[0023] For example, Figure 1 A network device and two terminal devices are shown. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0024] It should be understood that the embodiments of the present application can be applied to various communication systems. For example: the embodiments of the present application can be applied to global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, advanced long term evolution (LTE-A) system, new radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, NTN system, universal mobile telecommunication system (UMTS), wireless local area networks (WLAN), WiFi, fifth generation communication (5th-generation, 5G) system. The embodiments of the present application can also be applied to other communication systems, such as future communication systems. The future communication system may be, for example, a sixth-generation (6G) mobile communication system or a satellite communication system.

[0025] Traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, communication systems can not only support traditional cellular communications, but also support one or more other types of communications. For example, a communication system can support one or more of the following communications: device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), vehicle to vehicle (V2V) communication, and vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to communication systems that support the above communication methods.

[0026] The terminal device mentioned in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.

[0027] In some embodiments, the terminal device may be a station (STATION, ST) in a WLAN. In some embodiments, the terminal device may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, or a terminal device in a future-evolved public land mobile network (PLMN) network, etc.

[0028] In some embodiments, the terminal device may be a device that provides voice and / or data connectivity to a user. For example, the terminal device may be a handheld device, a vehicle-mounted device, etc. with a wireless connection function. As some specific examples, the terminal device may be a mobile phone, a tablet computer, a laptop, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

[0029] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip used to be arranged in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs the base station function in a future communication system. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network device.

[0030] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0031] With the rapid development of mobile terminals, users have higher and higher requirements for the ability of terminal devices to support communication with multiple networks at the same time. The network can be any of the communication systems mentioned above. For example, the current wireless communication of user mobile phones mainly includes communication with cellular networks, Wifi, etc.

[0032] In order to meet the transmission requirements of different communication networks, the RF system of the terminal equipment needs to be designed accordingly for different communication networks. For example, cellular networks basically support downlink 4×4 multiple-input multiple-output (MIMO), and Wi-Fi supports 2×2 MIMO.

[0033] The radio frequency system of the terminal device needs to send and receive signals in different working frequency bands corresponding to different communication networks. In some embodiments, two or more communication networks simultaneously supported by the terminal device may have similar working frequency bands. For example, the B40 frequency band of the cellular network is similar to the 2.4G frequency band of the Wifi network. For another example, the N79 frequency band of the cellular network is similar to the 5G frequency band of the Wifi network.

[0034] For ease of understanding, the following uses a radio frequency system that supports both the B40 band and the 2.4G band as an example to illustrate the simplified architecture of the radio frequency system of the terminal device. Figure 2 As shown, the RF system 200 is mainly composed of RF transceivers 211-212, power amplifiers (AP) 221-223, low noise amplifiers 231-236, switches 241-246, filters 251-256 and antennas 261-266.

[0035] See also Figure 2 The two radio frequency transceivers (transceivers) included in the radio frequency system 200 can meet the communication requirements of different networks. The two radio frequency transceivers are a cellular radio frequency transceiver 211 and a Wifi radio frequency transceiver 212. The Wifi radio frequency transceiver can be located on a WLAN integrated circuit (IC).

[0036] like Figure 2 As shown, the cellular RF transceiver 211 is connected to the power amplifier 221, the low noise amplifier 231-234, the switch 241-244, the filter 251-254 and the antenna 261-264 respectively, forming one transmission path and four reception paths. The Wifi RF transceiver 212 is connected to the power amplifier 222-223, the low noise amplifier 235-236, the switch 245-246, the filter 255-256 and the antenna 265-266 respectively, forming two transmission paths and two reception paths. Figure 2 The receiving path and transmitting path in the apparatus can receive and transmit radio frequency signals through the receiving module and the transmitting module respectively.

[0037] Figure 2The various antennas in the B40 can meet different signal transmission and reception requirements. Antenna 261 is the B40 primary receive (PRX) antenna, and antenna 262 is the diversity receive (DRX) antenna. Antenna 263 is the primary MIMO (PMIMO) antenna, and antenna 264 is the diversity MIMO (DMIMO) antenna. Antenna 265 is the link 0 (CHAIN0) antenna, and antenna 266 is the link 1 (CHAIN1) antenna.

[0038] exist Figure 2 In the illustrated architecture, after the cellular portion 264 antenna receives the signal, it passes through the filter 254 and the switch 244, and then the RF signal of the receiving channel is amplified by the low noise amplifier 234. The amplified RF signal enters the cellular RF transceiver 211 for analysis and conversion into a baseband signal.

[0039] After the Wifi part 265 antenna receives the signal, it will pass through the filter 255 and the switch 245, and then the receiving channel RF signal will be amplified by the low noise amplifier 235. After amplification, the RF signal enters the Wifi RF transceiver 212 for analysis and conversion into a baseband signal. The signal flow can be referred to the dotted arrow mark.

[0040] Depend on Figure 2 It can be seen that the RF circuits of Wi-Fi networks and cellular networks are basically designed independently. Therefore, the RF system in the terminal device can meet the transmission requirements of different communication networks in different scenarios.

[0041] In actual operation, the communication requirements of different networks in different scenarios are different, and some performance in the RF system may be redundant. In this case, the circuit components not only occupy a large area, but also increase the system power consumption. Figure 2 Taking the RF system shown in the figure as an example, cellular and Wifi can work at the same time. Wifi is more used indoors, while cellular is used both outdoors and indoors. When using Wifi indoors, it can basically meet the needs of data upload and download, and the demand for cellular data communication is not so strong, so the cellular downlink performance is redundant. When the cellular and Wifi circuits work at the same time, there will also be problems such as high power consumption and large device footprint.

[0042] It should be noted that the above-mentioned problem of performance redundancy and large device area occupied when the RF system works simultaneously in the cellular B40 band and the Wifi 2.4G band is only an example. The embodiments of the present application can be applied to any type of scenario where the RF system works simultaneously at multiple frequencies and different networks have different transmission requirements in different scenarios.

[0043] To solve the above problems, the present application provides a radio frequency system that utilizes the similar operating frequency bands of terminal devices in different networks to achieve the sharing of low noise amplifiers by multiple receiving paths, which not only saves the area occupied by the device, but also reduces performance redundancy.

[0044] by Figure 2 Taking the RF system shown as an example for analysis, the cellular part antenna 264 works in the B40 frequency band, and the Wifi part antenna 265 works in the 2.4G frequency band. As can be seen from the previous text, the operating frequencies of the cellular B40 LNA and the Wifi 2.4G LNA are similar. If the working bandwidth of the LNA is designed to be wider, the amplification of the 2.3~2.4G received signals can be achieved at the same time. Therefore, the Wifi and B40 MIMO parts can time-division multiplex the same LNA circuit for different scenarios. Similarly, when different receiving paths of the RF system work in the Wifi 5G frequency band and the cellular N79 frequency band respectively, these receiving paths can also reuse the low-noise amplifier function based on similar frequencies.

[0045] It should be noted that the method shown in the embodiment of the present application is based on the above Figure 2 The analysis suggests that the analysis process is also within the scope of protection of this application.

[0046] In order to better understand this application, Figure 3 , the radio frequency system proposed in the embodiment of the present application is described in detail. Figure 3 It is a schematic diagram of a radio frequency system provided in an embodiment of the present application.

[0047] like Figure 3 As shown, the RF system 300 includes a first RF transceiver 310 , a second RF transceiver 320 , a low noise amplifier 330 , a first antenna 340 , a second antenna 350 , a first receiving path 301 , and a second receiving path 302 .

[0048] The first RF transceiver 310 and the second RF transceiver 320 can both transmit and receive RF signals. When the two RF transceivers receive RF signals, they can perform processing such as analyzing the signals.

[0049] The first RF transceiver 310 can realize signal transmission and reception under any of the communication systems (networks) described above, without limitation here. For example, the first RF transceiver 310 is used to transmit, receive and process cellular network RF signals. For another example, the first RF transceiver 310 can be used to transmit, receive and process Wifi network RF signals. For another example, the first RF transceiver 310 can be used to transmit, receive and process WLAN RF signals.

[0050] The second RF transceiver 320 can support signal transmission and reception under a communication system different from that of the first RF transceiver 310. For example, when the first RF transceiver 310 is used to transmit, receive and process RF signals of a cellular network, the second RF transceiver 310 can be used to transmit, receive and process RF signals of a Wifi network. For another example, when the first RF transceiver 310 is used to transmit, receive and process RF signals of a Wifi network, the second RF transceiver 310 can be used to transmit, receive and process RF signals of a cellular network.

[0051] The first RF transceiver 310 is connected to the first antenna 340 via the first receiving path 301. Between the first RF transceiver 310 and the first antenna 340, the low noise amplifier 330 can amplify the signal received by the first antenna 340 and send the amplified signal to the first RF transceiver 310.

[0052] The second RF transceiver 320 is connected to the second antenna 350 through the second receiving path 302. A low noise amplifier 330 also passes between the second RF transceiver 320 and the second antenna 350. The low noise amplifier 330 can also amplify the signal received by the second antenna 350 and send the amplified signal to the second RF transceiver 320.

[0053] Depend on Figure 3 It can be seen that the first receiving path 301 and the second receiving path 302 share the low noise amplifier 330. Compared with providing low noise amplifiers in the first receiving path 301 and the second receiving path 302 respectively, sharing the low noise amplifier 330 can reduce the area occupied by circuit components.

[0054] A low noise amplifier is an amplifier with a low noise figure. It can shape very weak signals from the antenna to enhance the signal and facilitate subsequent device processing.

[0055] In some embodiments, the low noise amplifier 330 can directly process the signal from the antenna, such as Figure 3 In some embodiments, the signal received by the low noise amplifier 330 may be a signal processed by a filter or a filtering unit.

[0056] Low noise amplifiers usually have a certain frequency operating range, which refers to the operating frequency bandwidth under the specified distortion and rated output power conditions, that is, the operating bandwidth. The operating bandwidth can be expressed as the range between the lowest operating frequency of the low noise amplifier and the low noise operating frequency.

[0057] When the first receiving channel 301 and the second receiving channel 302 share the low noise amplifier 330, the working bandwidth of the low noise amplifier 330 should cover the working frequency bands of the first receiving channel 301 and the second receiving channel 302. Exemplarily, when the first receiving channel 301 is used to receive radio frequency signals in a first frequency band and the second receiving channel 302 is used to receive radio frequency signals in a second frequency band, the working bandwidth of the low noise amplifier 330 should cover the first frequency band and the second frequency band, thereby achieving amplification of the received signals in the first frequency band and the second frequency band.

[0058] The first frequency band and the second frequency band may correspond to networks supported by the first RF transceiver 310 and the second RF transceiver 320, respectively. Exemplarily, the first frequency band corresponds to the first network, and the second frequency band corresponds to the second network. The first network and the second network are different networks, so that the RF system 300 can work in different networks.

[0059] In some embodiments, the low noise amplifier 330 can be used for more than two receiving paths to share. For example, when the radio frequency system is also used for a third network, the receiving paths corresponding to the third network can also share the low noise amplifier 330. The following will take two receiving paths sharing the low noise amplifier as an example for introduction. It should be understood that the paths sharing the low noise amplifier are not limited to two.

[0060] In some embodiments, the low noise amplifier 330 may be one or more low noise amplifiers. In order to meet the signal reception of the radio frequency system, the number of low noise amplifiers is related to the signal amplification requirements of the receiving path of the radio frequency system. For example, when the receiving path in the radio frequency system can meet the signal amplification requirements through one low noise amplifier, the low noise amplifier 330 may be one. For another example, when the receiving path in the radio frequency system needs to pass through two low noise amplifiers to meet the signal amplification requirements, the low noise amplifier 330 may be two.

[0061] The first receiving path 301 and the second receiving path 302 can share the low noise amplifier 330 in a time division multiplexing manner. That is, when the first receiving path 301 uses the low noise amplifier 330, the second receiving path 302 does not use the low noise amplifier 330. Correspondingly, when the second receiving path 302 uses the low noise amplifier 330, the first receiving path 301 does not use the low noise amplifier 330. It should be understood that the first receiving path 301 and the second receiving path 302 can not use the low noise amplifier 330 at the same time, which helps the RF system save power consumption when performance is redundant. It should be noted that the first receiving path 301 and the second receiving path 302 cannot use the low noise amplifier 330 at the same time.

[0062] In some embodiments, when the transmission demand of the first network corresponding to the first RF transceiver 310 is high, the first receiving path 301 uses a low noise amplifier 330 to meet the signal reception efficiency of the first network. In this case, the second receiving path 302 cannot use the low noise amplifier 330. For example, the first network is a cellular network, and the second network is a Wifi network. When the terminal device to which the RF system 300 belongs is outdoors, the terminal device may download a large amount of data through the cellular network. The first receiving path 301 uses a low noise amplifier 330 to meet the data communication demand in the cellular network. Usually when outdoors, the demand for the Wifi network is low. When the low noise amplifier 330 is used in the first receiving path 301, it means that the second receiving path 302 is disconnected, and other devices on the second receiving path 302 can save power consumption when not in use.

[0063] In some embodiments, when the second network transmission demand corresponding to the second RF transceiver 320 is high, the second receiving path 302 uses a low noise amplifier 330 to meet the signal reception efficiency of the second network. In this case, the first receiving path 301 cannot use the low noise amplifier 330. For example, the first network is a cellular network, and the second network is a Wifi network. When the terminal device to which the RF system 300 belongs is indoors, the Wifi network transmission demand is large, and the low noise amplifier 330 is used in the second receiving path 302 to meet the data communication demand in the Wifi network. Usually when indoors, the Wifi network can meet the communication needs of the terminal device to upload and download data, and the first receiving path 301 itself does not need to receive signals, so it is also helpful to save power consumption when it is in a disconnected state, and can avoid cellular network downlink performance redundancy.

[0064] The radio frequency system 300 can realize that the first receiving path 301 and the second receiving path 302 share the low noise amplifier 330 in different application scenarios. In some embodiments, the first receiving path 301 turns off the signal receiving function in the first scenario, and the low noise amplifier 330 is used for the second receiving path 302 in the first scenario. In some embodiments, the second receiving path 302 turns off the signal receiving function in the first scenario, and the low noise amplifier 330 is used for the first receiving path 301 in this scenario.

[0065] The first scenario can be determined based on the communication network supported by the radio frequency system 300. Exemplarily, when the radio frequency system 300 supports cellular networks and Wifi networks, the first scenario can be indoor or outdoor as described above. For example, when the first scenario is indoors, if the first receiving path 301 corresponds to a cellular network, the signal receiving function can be turned off, and the low noise amplifier 330 is used for the second receiving path 302 corresponding to the Wifi network. Exemplarily, when the radio frequency system 300 supports cellular 4G and 5G networks, the first scenario can be determined based on the communication environment of the 4G and 5G networks.

[0066] The radio frequency system 300 can realize time division multiplexing of the low noise amplifier 330 by the first receiving path 301 and the second receiving path 302 in a variety of ways. Exemplarily, the radio frequency system 300 can realize that the first receiving path 301 and the second receiving path 302 are in different states at the same time through a control system. For example, the control system can realize that when the first receiving path 301 is in a connected state, the second receiving path 302 is in a disconnected state. Exemplarily, the radio frequency system 300 can realize the switching of the low noise amplifier 330 between the first receiving path 301 and the second receiving path 302 through a switching system.

[0067] As a possible implementation, the RF system 300 can use a switch circuit to realize that the first receiving path 301 and the second receiving path 302 share the low noise amplifier 330. For example, when the switch circuit is a single pole multiple throw (SPNT), the first receiving path 301 and the second receiving path 302 can be time-division multiplexed using the low noise amplifier 330 through switch switching. For another example, the switch circuit can use multiple switch devices to realize that the first receiving path 301 and the second receiving path 302 use the low noise amplifier 330 at different times.

[0068] Exemplarily, the RF system may include a first switch circuit connected between the first RF transceiver, the second RF transceiver and the low noise amplifier. When the first switch circuit is in the first state, the first RF transceiver and the low noise amplifier are in a connected state. When the first switch circuit is in the second state, the second RF transceiver and the low noise amplifier are in a connected state. As an example, when the first switch circuit is in the first state, the second RF transceiver and the low noise amplifier are in a disconnected state; when the first switch circuit is in the second state, the first RF transceiver and the low noise amplifier are in a disconnected state. As an example, when the first switch circuit is in the third state, the first RF transceiver and the low noise amplifier are in a disconnected state, and the second RF transceiver and the low noise amplifier are also in a disconnected state.

[0069] For ease of understanding, the following Figure 4 An exemplary introduction is given to a radio frequency system including a first switching circuit. Figure 3 compared to, Figure 4 The RF system in the main part is to add the first switch circuit. For simplicity, Figure 3 Terms that have been explained in will not be repeated here.

[0070] Figure 4 The RF system 400 includes a first RF transceiver 410, a second RF transceiver 420, a low noise amplifier 430, a first antenna 440, a second antenna 450, a first receiving path 401, a second receiving path 402, and a first switch circuit 460. The first RF transceiver 410, the second RF transceiver 420, the low noise amplifier 430, the first antenna 440, the second antenna 450, the first receiving path 401, and the second receiving path 402 correspond to the first RF transceiver 310, the second RF transceiver 320, the low noise amplifier 330, the first antenna 340, the second antenna 350, the first receiving path 301, and the second receiving path 302 in the RF system 300, respectively.

[0071] like Figure 4 As shown, the first switch circuit 460 is used to connect the first RF transceiver 410, the second RF transceiver 420 and the low noise amplifier 430. Exemplarily, the first switch circuit 460 may be a single-pole double-throw switch.

[0072] When the first switch circuit 460 is in the first state, the first RF transceiver 410 and the low noise amplifier 430 can be connected, and the first receiving path 401 is in a connected state. Accordingly, the second RF transceiver 420 and the low noise amplifier 430 cannot be connected through the first switch circuit 460, so the second receiving path 402 is in a disconnected state.

[0073] When the first switch circuit 460 is in the second state, the second RF transceiver 420 and the low noise amplifier 430 can be connected, and the second receiving path 402 is in a connected state. Accordingly, the first RF transceiver 410 and the low noise amplifier 430 cannot be connected through the first switch circuit 460, so the first receiving path 401 is in a disconnected state.

[0074] Depend on Figure 4 It can be seen that, through the first switch circuit 460, it can be controlled whether a part of the circuit of the first receiving path 401 is in a connected state or a part of the circuit of the second receiving path 402 is in a connected state, so as to realize the time division multiplexing of the low noise amplifier 430 of the first receiving path 401 and the second receiving path 402. In this structure, whether the first antenna 440 and the second antenna 450 receive signals or transmit signals to the low noise amplifier 430 can be controlled by other methods to avoid the low noise amplifier 430 receiving signals from the first antenna 440 and the second antenna 450 at the same time.

[0075] For example, Figure 4 The first switch circuit 460 in the embodiment can also be used to connect the low noise amplifier 430, the first antenna 440 and the second antenna 450, which will be described below in conjunction with Figure 5 Describe. Figure 4 When the first switch circuit 460 is located between the low noise amplifier 430 and the antenna, the low noise amplifier 430 can receive the signal of the first antenna 440 and the signal of the second antenna 450 at different times. In this structure, the low noise amplifier 430 can determine whether to send a signal to the first RF transceiver 410 or the second RF transceiver 420 by other means.

[0076] Exemplarily, the radio frequency system may include a second switch circuit in addition to the first switch circuit. The second switch circuit may be used to connect the first antenna, the second antenna, and the low noise amplifier. When the second switch circuit is in the first state, the first antenna is in a connected state with the low noise amplifier; when the second switch circuit is in the second state, the second antenna is in a connected state with the low noise amplifier. The radio frequency system may control the first receiving path and the second receiving path to not be in a connected state at the same time through the two switch circuits.

[0077] As an example, when the second switch circuit is in the first state, the second antenna and the low noise amplifier are in a disconnected state; when the second switch circuit is in the second state, the first antenna and the low noise amplifier are in a disconnected state.

[0078] As an example, when the second switch circuit is in the third state, the first antenna and the low noise amplifier are in a disconnected state, and the second antenna and the low noise amplifier are also in a disconnected state.

[0079] For ease of understanding, the following Figure 5 An exemplary introduction is given to a radio frequency system including a first switching circuit and a second switching circuit. Figure 4 compared to, Figure 5 The RF system in the main adds a second switch circuit after the low noise amplifier. For simplicity, Figure 3 and Figure 4 The terms that have been explained in will not be repeated.

[0080] Figure 5The RF system 500 includes a first RF transceiver 510, a second RF transceiver 520, a low noise amplifier 530, a first antenna 540, a second antenna 550, a first receiving path 501, a second receiving path 502, a first switch circuit 560, and a first switch circuit 570. The first RF transceiver 510, the second RF transceiver 520, the low noise amplifier 530, the first antenna 540, the second antenna 550, the first receiving path 501, the second receiving path 502, and the first switch circuit 560 correspond to the first RF transceiver 410, the second RF transceiver 420, the low noise amplifier 430, the first antenna 440, the second antenna 450, the first receiving path 401, the second receiving path 402, and the first switch circuit 460 in the RF system 400, respectively.

[0081] like Figure 5 As shown, the second switch circuit 570 connects the first antenna 540, the second antenna 550 and the low noise amplifier 530. Exemplarily, the second switch circuit 570 may also be a single-pole double-throw switch.

[0082] When the second switch circuit 570 is in the first state, the first antenna 540 and the low noise amplifier 530 can be connected. At this time, if the first switch circuit 560 is also in the first state, the first receiving path 501 is in a connected state; if the first switch circuit 560 is in the second state, the first receiving path 501 is in a disconnected state. Accordingly, the second antenna 550 and the low noise amplifier 530 cannot be connected through the second switch circuit 570, so the second receiving path 502 is in a disconnected state.

[0083] When the second switch circuit 570 is in the second state, the second antenna 550 and the low noise amplifier 530 can be connected. At this time, if the first switch circuit 560 is also in the second state, the second receiving path 502 is in a connected state; if the first switch circuit 560 is in the first state, the second receiving path 502 is in a disconnected state. Accordingly, the first antenna 540 and the low noise amplifier 530 cannot be connected through the second switch circuit 570, so the first receiving path 501 is in a disconnected state.

[0084] Depend on Figure 5 It can be seen that the first switch circuit 560 and the second switch circuit 570 can control whether the first receiving path 501 is in a connected state or the second receiving path 502 is in a connected state, thereby realizing the time division multiplexing of the low noise amplifier 430 of the first receiving path 501 and the second receiving path 502.

[0085] Combined with the previous article Figures 3 to 5 The following describes the structure diagram of various implementation methods of the radio frequency system provided in the embodiments of the present application. Figure 2 and Figure 6 The radio frequency system in the embodiment of the present application is compared and explained for practical application. Figure 6 Only Figure 2 Taking a group of antennas in the example, the structure of the embodiment of the present application is used to improve the radio frequency system. In practical applications, the radio frequency system can have multiple groups of receiving paths sharing multiple low noise amplifiers. For simplicity, Figure 2 The terms that have been explained in will not be repeated.

[0086] See also Figure 6 The RF system 600 is mainly composed of RF transceivers 611-612, power amplifiers 621-623, low noise amplifiers 631-635, switches 641-646, filters 651-656 and antennas 661-666.

[0087] like Figure 6 As shown, the cellular RF transceiver 611 is connected to the power amplifier 621, the low noise amplifier 631-633, the switch 641-643, the filter 651-653 and the antenna 661-663 respectively, forming a transmission path and three reception paths. The Wifi RF transceiver 612 is connected to the power amplifier 622-223, the low noise amplifier 635, the switch 644 and the switch 646, the filter 655-656 and the antenna 665-666 respectively, forming two transmission paths and one reception path.

[0088] However, with Figure 2 The difference is that the cellular RF transceiver 611 and the Wifi RF transceiver 612 are respectively connected to the low noise amplifier 634 through the switch 645, and the low noise amplifier 634 is respectively connected to the filters 654~655 and the first antenna 664~665 through the switch 644, forming two receiving paths that will not be in a connected state at the same time.

[0089] When the radio frequency system 600 is connected to Wifi indoors, the working process is as follows:

[0090] S1: The Wifi receiving module works, and the Wifi signal received by the antenna 665 passes through the filter 655, the switch 644, the low noise amplifier 634, the switch 645 in sequence, and then enters the Wifi RF transceiver 612. The signal flow can be referred to the dotted arrow mark.

[0091] S2: The Wifi transmitting module works. The modulated signal of the Wifi RF transceiver 612 is amplified by the power amplifier 622 , passes through the switch 644 and the filter 655 in sequence, and is sent out by the antenna 665 .

[0092] S3: When the Wifi receiving module is working, the signal of the cellular antenna 664 is set to the off state in the switch 644, that is, the cellular RF transceiver 611 does not receive the signal from the antenna 664. The MIMO function is turned off.

[0093] S4: When the Wifi module is not working, the antenna 665 receives the Wifi signal and passes through the filter 655, switch 644, low noise amplifier 634, switch 645 to the Wifi RF transceiver 612 in sequence. However, since the switch 644 and switch 645 are set to the closed state, the path is disconnected. At this time, the cellular part MIMO function is turned on, and the signal of the antenna 664 passes through the filter 654 and the switch 644. The low noise amplifier 634 amplifies the RF signal of the receiving channel. After amplification, the RF signal enters the switch 645, and finally reaches the cellular RF transceiver 611 for analysis and conversion into a baseband signal.

[0094] and Figure 2 compared to, Figure 6 The RF system in the embodiment uses five low noise amplifiers, thus saving the cost of one low noise amplifier and also saving the area occupied by the low noise amplifier.

[0095] In actual applications, when connecting to Wifi communication scenarios indoors, the requirements for cellular reception performance are not strong. In this scenario, the downlink 4×4 MIMO function of the frequency band close to the cellular and Wifi frequencies is turned off and falls back to downlink 2×2 MIMO. At this time, the 2×2 MIMO of Wifi can reuse the disabled low-noise amplifier circuit, thereby saving the cost of two low-noise amplifiers, reducing the area occupied by two low-noise amplifier devices, and saving power consumption after the cellular MIMO is turned off.

[0096] exist Figure 6 In the present invention, the Wi-Fi receiving path can reuse the cellular low-noise amplifier circuit by switching the switch, thereby saving the low-noise amplifier cost, reducing the device area and saving power consumption.

[0097] Figure 7 Schematic diagram of the structure of a terminal device provided in an embodiment of the present application. Figure 7 As shown, the terminal device 700 may include a radio frequency system 710 as described above.

[0098] Combination of the above Figures 1 to 7 The device embodiment of the present application is described in detail. Figure 8 The method embodiment of the present application is described in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so the parts not described in detail can refer to the previous device embodiment.

[0099] Figure 8The RF system may include: a first receiving path connected between a first antenna and a first RF transceiver; and a second receiving path connected between a second antenna and a second RF transceiver.

[0100] like Figure 8 As shown, the control method may mainly include step S810, which will be described in detail below.

[0101] In step S810, the first receiving path and the second receiving path share a low noise amplifier by time division multiplexing; wherein the first receiving path receives a radio frequency signal of a first frequency band by using the first receiving path, and the first frequency band corresponds to the first network; and the second receiving path receives a radio frequency signal of a second frequency band by using the second receiving path, and the second frequency band corresponds to the second network.

[0102] Optionally, the control method further includes turning off a signal receiving function of the first receiving path in the first scenario, and the low noise amplifier is used for the second receiving path.

[0103] Optionally, the RF system also includes: a first switching circuit, connected between the first RF transceiver, the second RF transceiver and the low noise amplifier, when the first switching circuit is in a first state, the first RF transceiver and the low noise amplifier are in a connected state, when the first switching circuit is in a second state, the second RF transceiver and the low noise amplifier are in a connected state.

[0104] Optionally, the radio frequency system also includes: a second switching circuit, connected between the first antenna, the second antenna and the low noise amplifier, when the second switching circuit is in a first state, the first antenna and the low noise amplifier are in a connected state, when the second switching circuit is in a second state, the second antenna and the low noise amplifier are in a connected state.

[0105] Optionally, the low noise amplifier is used to amplify received signals in the first frequency band and the second frequency band.

[0106] Optionally, the first network is a cellular network, and the second network is a wireless fidelity network.

[0107] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the terminal device provided in the present application, and the program enables the computer to execute the method executed by the terminal device in each embodiment of the present application.

[0108] It should be understood that the computer-readable storage medium mentioned in the embodiments of the present application can be any available medium that can be read by a computer or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a digital video disc (DVD)) or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0109] The embodiment of the present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device provided in the embodiment of the present application, and the program enables the computer to execute the method executed by the terminal device in each embodiment of the present application.

[0110] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.

[0111] The embodiment of the present application also provides a computer program. The computer program can be applied to the terminal or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal or network device in each embodiment of the present application.

[0112] In this application, the terms "system" and "network" can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application, and are not intended to limit this application.

[0113] It should be understood that in the various embodiments of the present application, "first", "second", etc. are used to distinguish different objects rather than to describe a specific order. The size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0114] In the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.

[0115] In the embodiments of the present application, determining B based on A does not mean determining B only based on A. B can also be determined based on A and / or other information.

[0116] In the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0117] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0118] In several embodiments provided in the present application, it should be understood that when a certain part is said to be "connected" or "connected" to another part, it means that the part can not only be "directly connected" but also "electrically connected" with another element intervening therebetween. In addition, the term "connected" also means that the part is "physically connected" and "wirelessly connected". In addition, when a certain part is said to "include" a certain element, unless otherwise stated, it means that the certain part can include another element, rather than excluding the other element.

[0119] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0120] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0121] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A radio frequency system, characterized in that: include: A first receiving path, connected between the first antenna and the first RF transceiver, the first receiving path being used to receive RF signals of a first frequency band, the first frequency band corresponding to a first network; a second receiving path connected between the second antenna and the second RF transceiver, the second receiving path being used to receive RF signals of a second frequency band, the second frequency band corresponding to a second network; The first receiving path and the second receiving path share a low noise amplifier in a time division multiplexing manner.

2. The radio frequency system according to claim 1, characterized in that: The first receiving path turns off the signal receiving function in a first scenario, and in the first scenario, the low noise amplifier is used in the second receiving path.

3. The radio frequency system according to claim 1, characterized in that: The radio frequency system also includes: The first switch circuit is connected between the first RF transceiver, the second RF transceiver and the low noise amplifier. When the first switch circuit is in a first state, the first RF transceiver and the low noise amplifier are in a connected state. When the first switch circuit is in a second state, the second RF transceiver and the low noise amplifier are in a connected state.

4. The radio frequency system according to claim 3, characterized in that: The radio frequency system also includes: The second switch circuit is connected between the first antenna, the second antenna and the low noise amplifier. When the second switch circuit is in a first state, the first antenna and the low noise amplifier are in a connected state. When the second switch circuit is in a second state, the second antenna and the low noise amplifier are in a connected state.

5. The radio frequency system according to any one of claims 1 to 4, characterized in that: The low noise amplifier is used to amplify received signals in the first frequency band and the second frequency band.

6. The radio frequency system according to any one of claims 1 to 4, characterized in that: The first network is a cellular network, and the second network is a Wi-Fi network.

7. A control method for a radio frequency system, characterized in that: The radio frequency system comprises: A first receiving path connected between the first antenna and the first RF transceiver; A second receiving path connected between the second antenna and the second RF transceiver; The control method comprises: The first receiving path and the second receiving path share a low noise amplifier by time division multiplexing; The first receiving path receives a radio frequency signal of a first frequency band by using the first receiving path, and the first frequency band corresponds to a first network; and the second receiving path receives a radio frequency signal of a second frequency band by using the second receiving path, and the second frequency band corresponds to a second network.

8. The control method according to claim 7, characterized in that: Also includes: In the first scenario, the signal receiving function of the first receiving path is turned off, and the low noise amplifier is used for the second receiving path.

9. A terminal device, characterized in that: Comprising the radio frequency system as claimed in any one of claims 1-6.

10. A computer-readable storage medium, characterized in that: A program is stored thereon, the program causing a computer to execute the method according to claim 7 or 8.

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