Wireless device and signal processing method

Abstract

Provided are a wireless device and a signal processing method, relating to the technical field of communication. The wireless device comprises coupling circuitry, radio frequency circuitry, and baseband circuitry. The coupling circuitry is configured to extract a portion of a first transmit signal to obtain a feedback signal. The radio frequency circuitry comprises a transmit circuit and a feedback circuit. The transmit circuit is configured to up-convert based on a first local oscillator signal to transmit the first transmit signal to the coupling circuitry on a first channel. The feedback circuit is configured to down-convert based on the first local oscillator signal to receive the feedback signal from the coupling circuitry, or down-convert based on a second local oscillator signal to receive a second receive signal of a second channel. The baseband circuitry is configured to receive the feedback signal or the second receive signal from the feedback circuit, and perform a channel availability check on the second channel based on the second receive signal.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and in particular to a wireless device and a signal processing method. BACKGROUND

[0002] A wireless local area network (WLAN) can communicate using a 5Ghz frequency band, but the working frequency band of the global radar system can overlap. Therefore, the wireless device performs a channel availability check (CAC) on a dynamic frequency selection (DFS) channel that can include a radar signal before communicating based on a 5Ghz channel. When the DFS channel does not include a radar signal, the wireless device communicates based on the 5Ghz channel or switches to the DFS channel that has been detected by CAC.

[0003] However, the above-mentioned CAC detection takes a long time, resulting in interruption of wireless device service transmission. SUMMARY

[0004] The present application provides a wireless device and a signal processing method, which can reduce the possibility of CAC causing WLAN service interruption.

[0005] In a first aspect, a wireless device is provided, which includes a coupling circuit, a radio frequency circuit, and a baseband circuit. The coupling circuit is configured to extract a portion of a first transmission signal to obtain a feedback signal. The radio frequency circuit includes a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit, and a feedback circuit. The first local oscillator driving circuit is configured to provide a first local oscillator signal, and a frequency of the first local oscillator signal is a frequency of a first channel. The second local oscillator driving circuit is configured to provide a second local oscillator signal, and a frequency of the second local oscillator signal is a frequency of a second channel, wherein the second channel is different from the first channel. The transmitting circuit is configured to up-convert based on the first local oscillator signal to transmit the first transmission signal to the coupling circuit on the first channel. The feedback circuit is configured to down-convert based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-convert based on the second local oscillator signal to receive a second reception signal of the second channel. The baseband circuit is configured to receive the feedback signal or the second reception signal from the feedback circuit, and perform CAC on the second channel according to the second reception signal.

[0006] In this way, the wireless device uses the feedback circuit to implement time-division multiplexing, to implement time-division transmission of the feedback signal and the second received signal. When the feedback circuit transmits the second received signal, the wireless device uses the feedback circuit to implement CAC of the second channel, so that the wireless device can complete CAC of the second channel before switching to the second channel. If the wireless device switches from the first channel to the second channel to transmit WLAN service, the wireless device does not need to perform CAC on the second channel again, and after switching to the second channel, the wireless device can use the second channel to transmit WLAN service, thereby reducing the possibility of WLAN service interruption caused by CAC. Moreover, compared with adding a set of special circuit for processing the second received signal, the above scheme can reuse the processing capability of the feedback circuit, and reduce the complexity of the device.

[0007] In a possible design, the first local oscillator driving circuit and the second local oscillator driving circuit have overlapping working frequency bands. The overlapping working frequency bands can be completely overlapping working frequency bands (i.e., the same working frequency band) or partially overlapping working frequency bands.

[0008] In a possible design, the wireless device further includes a first antenna, a second antenna, and a first switch. The first antenna is connected to the transmitting circuit via the coupling circuit, and is configured to transmit the first transmitted signal after the extraction processing. The second antenna is connected to the feedback circuit via the first switch, and is configured to receive the second received signal. The first switch is configured to select the feedback signal or the second received signal, to transmit the selected signal to the feedback circuit, where the feedback circuit is connected to the coupling circuit via the first switch.

[0009] That is, the first antenna is configured to transmit WLAN service of the first channel, to enable normal transmission of the WLAN service of the first channel. The wireless device additionally includes a second antenna, and the second antenna is configured to receive the second received signal of the second channel. Since the first antenna and the second antenna are independent antennas, the transmission of the WLAN service of the first channel and the reception of the second received signal are independent and do not affect each other. Moreover, the first switch is configured to select one of the feedback signal and the second received signal, to enable time-division multiplexing of the feedback circuit.

[0010] In a possible design, the number of feedback circuits is at least two, and the number of second antennas is one. The wireless device further includes a second switch. The second switch is configured to select one feedback circuit from the at least two feedback circuits, to enable the second antenna to transmit the second received signal to the selected feedback circuit.

[0011] The switching control signal of the second switch can be transmitted through a lead of a general input-output (GPIO) interface. In a case where the lead of the GPIO interface is connected to the radio frequency circuit and the second switch, the radio frequency circuit can transmit the switching control signal through the lead of the GPIO interface to control the second switch to switch the working state, so as to select a relatively idle feedback circuit from the at least two feedback circuits, and transmit the second receiving signal to the selected feedback circuit, thereby improving the signal transmission flexibility.

[0012] In a possible design, the radio frequency circuit further includes a receiving circuit. The receiving circuit is configured to perform frequency down conversion based on the first local oscillation signal, so as to receive a part of the radio frequency signal coupled by the first antenna and belonging to the first channel.

[0013] That is, the receiving circuit and the feedback circuit are independent of each other, and the signal reception of the first channel and the CAC of the second channel do not affect each other, that is, the wireless device can normally receive the WLAN service of the first channel without affecting the CAC of the second channel.

[0014] In a possible design, the wireless device further includes a third antenna and a third switch, and the radio frequency circuit further includes a receiving circuit. The receiving circuit is configured to perform frequency down conversion based on the first local oscillation signal, so as to receive a part of the radio frequency signal coupled by the third antenna and belonging to the first channel. The coupling circuit is further connected to the feedback circuit via the third switch, and the coupling circuit is further configured to extract a part of the radio frequency signal coupled by the third antenna to obtain an extracted signal. The third switch is configured to select the feedback signal or the extracted signal to transmit the selected signal to the feedback circuit. The feedback circuit is configured to perform frequency down conversion based on the second local oscillation signal, so as to receive the second receiving signal from the extracted signal.

[0015] That is, the wireless device performs the CAC based on a part of the radio frequency signal coupled by the third antenna, so as to simplify the circuit structure and help reduce the device cost. The third switch controls which of the feedback signal and the extracted signal is selected, so that the feedback circuit realizes time-division multiplexing. Even if the wireless device can perform the CAC on the second channel, the normal reception of the signal of the first channel is not affected, and the WLAN service of the first channel is normally received.

[0016] In a possible design, the wireless device further includes a fourth switch. The fourth switch is configured to control the coupling circuit to be connected to the terminal matching circuit to achieve good isolation when the third switch selects the feedback signal. Alternatively, the fourth switch controls the coupling circuit to be disconnected from the terminal matching circuit when the third switch selects the extracted signal. In this way, the coupling circuit can feed back the extracted signal through the third switch when the coupling circuit is in the Rx state.

[0017] In one possible design, the feedback circuit is configured to down-convert based on the first local signal when receiving the feedback signal from the coupling circuit, and is configured to down-convert based on the second local signal when receiving the second receive signal of the second channel.

[0018] That is, the feedback circuit is time-division multiplexed.

[0019] In one possible design, the baseband circuitry is further configured to perform digital pre-distortion detection or channel correction based on the feedback signal.

[0020] In one possible design, the baseband circuitry includes a sample rate converter (SRC). The SRC is configured to perform interface adaptation processing on the signal from the feedback circuit, the interface adaptation processing including at least one of: sample rate processing, bandwidth processing, signal-to-noise ratio processing, to enable the signal from the feedback circuit to be adapted for an interface.

[0021] In one possible design, the baseband circuitry includes a sample rate converter (SRC). The SRC is configured to perform interface adaptation processing on the signal from the feedback circuit, the interface adaptation processing including at least one of: sample rate processing, bandwidth processing, signal-to-noise ratio processing, to enable the signal from the feedback circuit to be adapted for an interface.

[0022] In one possible design, the first local driving circuit and the second local driving circuit operate in overlapping frequency bands.

[0023] In one possible design, the method further includes transmitting the first transmit signal after the extraction processing by a first antenna, where the first antenna is connected to the transmit circuitry via the coupling circuit. The second receive signal is received by a second antenna, where the second antenna is connected to the feedback circuit via a first switch. The first switch selects the feedback signal or the second receive signal for transmission to the feedback circuit, where the coupling circuit is connected to the feedback circuit via the first switch. In this case, the wireless device further includes the first antenna, the second antenna, and the first switch.

[0024] In one possible design, the number of feedback circuits is at least two, and the number of second antennas is one. The method further includes selecting, by a second switch, one of the at least two feedback circuits for the second antenna to transmit the second receive signal to the selected feedback circuit, where the wireless device further includes the second switch.

[0025] In one possible design, the method further includes downconverting, by a receive circuit, based on the first local oscillation signal, to receive the portion of the radio frequency signal coupled by the first antenna that belongs to the first channel, where the radio frequency circuit further includes the receive circuit.

[0026] In one possible design, the method further includes downconverting, by a receive circuit, based on the first local oscillation signal, to receive the portion of the radio frequency signal coupled by the third antenna that belongs to the first channel, and extracting, by a coupling circuit, a portion of the radio frequency signal coupled by the third antenna to obtain an extracted signal, where the coupling circuit is further coupled to the feedback circuit via a third switch, the third switch selects the feedback signal or the extracted signal to transmit the selected signal to the feedback circuit, and the feedback circuit downconverts based on the second local oscillation signal to receive the second receive signal from the extracted signal, where the wireless device further includes the third antenna and the third switch, and the radio frequency circuit further includes the receive circuit.

[0027] In one possible design, the method further includes, when the third switch selects the feedback signal, controlling, by a fourth switch, the coupling circuit to be coupled to a termination matching circuit, or when the third switch selects the extracted signal, controlling, by the fourth switch, the coupling circuit to be decoupled from the termination matching circuit, where the wireless device further includes the fourth switch.

[0028] In one possible design, the method further includes, when the feedback circuit downconverts based on the first local oscillation signal to receive the feedback signal from the coupling circuit, the feedback circuit does not receive the second receive signal, or when the feedback circuit downconverts based on the second local oscillation signal to receive the second receive signal of the second channel, the feedback circuit does not receive the feedback signal.

[0029] In one possible design, the method further includes performing, by the baseband circuit, digital pre-distortion detection or channel correction based on the feedback signal.

[0030] In one possible design, the method further includes performing, by a sample rate converter (SRC), interface adaptation processing on a signal from the feedback circuit, where the interface adaptation processing includes at least one of the following: sample rate processing, bandwidth processing, signal-to-noise ratio processing, and the baseband circuit includes the SRC.

[0031] In a third aspect, a computer-readable storage medium is provided, which stores a program. When the program is invoked by a processor, the method of the second aspect or any one of the second aspect is executed.

[0032] For example, when the program is invoked by the processor, the circuit in the wireless device performs the following steps: the transmitting circuit up-converts based on the first local oscillator signal to send the first transmitting signal to the coupling circuit on the first channel, wherein the first local oscillator driving circuit provides the first local oscillator signal, and the frequency of the first local oscillator signal is the frequency of the first channel. The coupling circuit extracts a part of the first transmitting signal to obtain a feedback signal. The feedback circuit down-converts based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-converts based on the second local oscillator signal to receive the second receiving signal of the second channel, wherein the second local oscillator driving circuit provides the second local oscillator signal, and the frequency of the second local oscillator signal is the frequency of the second channel, and the second channel is different from the first channel. The baseband circuit receives the feedback signal or the second receiving signal from the feedback circuit, and performs the channel availability check on the second channel according to the second receiving signal. Wherein the wireless device comprises: a processor, a coupling circuit, a radio frequency circuit and a baseband circuit. The radio frequency circuit comprises a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit and a feedback circuit.

[0033] In a fourth aspect, a computer program product comprising instructions which, when the computer program product is invoked by a processor, causes the method of the second aspect or any one of the second aspects to be performed.

[0034] For example, when the program is invoked by the processor, the circuit in the wireless device performs the following steps: the transmitting circuit up-converts based on the first local oscillator signal to send the first transmitting signal to the coupling circuit on the first channel, wherein the first local oscillator driving circuit provides the first local oscillator signal, and the frequency of the first local oscillator signal is the frequency of the first channel. The coupling circuit extracts a part of the first transmitting signal to obtain a feedback signal. The feedback circuit down-converts based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-converts based on the second local oscillator signal to receive the second receiving signal of the second channel, wherein the second local oscillator driving circuit provides the second local oscillator signal, and the frequency of the second local oscillator signal is the frequency of the second channel, and the second channel is different from the first channel. The baseband circuit receives the feedback signal or the second receiving signal from the feedback circuit, and performs the channel availability check on the second channel according to the second receiving signal. Wherein the wireless device comprises: a processor, a coupling circuit, a radio frequency circuit and a baseband circuit. The radio frequency circuit comprises a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit and a feedback circuit.

[0035] The technical effects brought by any one of the second to fourth aspects can refer to the beneficial effects provided in the corresponding method above, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1a A communication system architecture diagram is provided for the embodiments of the present application.

[0037] Figure 1b Another communication system architecture diagram provided for embodiments of the application;

[0038] Figure 2 A working principle diagram provided for embodiments of the application;

[0039] Figure 3 A circuit structure diagram of a wireless device provided for embodiments of the application;

[0040] Figure 4a An interface schematic diagram of a coupler provided for embodiments of the application;

[0041] Figure 4b An interface schematic diagram of a coupler in a transmitting state provided for embodiments of the application;

[0042] Figure 4c An interface schematic diagram of a coupler in a receiving state provided for embodiments of the application;

[0043] Figure 5a A circuit structure diagram of another wireless device provided for embodiments of the application;

[0044] Figure 5b A circuit structure diagram of yet another wireless device provided for embodiments of the application;

[0045] Figure 6a A circuit structure diagram of yet another wireless device provided for embodiments of the application;

[0046] Figure 6b An interface schematic diagram of another coupler in a transmitting state provided for embodiments of the application;

[0047] Figure 6c An interface schematic diagram of another coupler in a receiving state provided for embodiments of the application;

[0048] Figure 6d An interface schematic diagram of yet another coupler in a transmitting state provided for embodiments of the application;

[0049] Figure 6e An interface schematic diagram of yet another coupler in a receiving state provided for embodiments of the application;

[0050] Figure 7 A circuit structure diagram of yet another wireless device provided for embodiments of the application;

[0051] Figure 8 A circuit structure diagram of yet another wireless device provided for embodiments of the application;

[0052] Figure 9aA flowchart of a communication method provided by an embodiment of the present application is shown in FIG. 1;

[0053] Figure 9b A flowchart of another communication method provided by an embodiment of the present application is shown in FIG. 2;

[0054] Figure 10a A flowchart of yet another communication method provided by an embodiment of the present application is shown in FIG. 3;

[0055] Figure 10b A flowchart of still another communication method provided by an embodiment of the present application is shown in FIG. 4;

[0056] Figure 10c A flowchart of yet another communication method provided by an embodiment of the present application is shown in FIG. 5;

[0057] Figure 10d A working state diagram provided by an embodiment of the present application is shown in FIG. 6;

[0058] Figure 11a A flowchart of yet another communication method provided by an embodiment of the present application is shown in FIG. 7;

[0059] Figure 11b A working state diagram provided by another embodiment of the present application is shown in FIG. 8. DETAILED DESCRIPTION

[0060] The terms "first" and "second" and the like in the specification of the present application and in the accompanying drawings are used to distinguish different objects, or to distinguish different treatments of the same object, and are not used to describe a specific order of the objects. In the embodiments of the present application, "a plurality of" includes two or more.

[0061] Figure 1a An architecture diagram of a communication system provided by an embodiment of the present application is shown in FIG. 9. As shown in FIG. 9, the communication system includes a first network and a second network. Figure 1aAs shown, the communication system 1000 includes at least two wireless devices. Taking two wireless devices as an example, the first wireless device 110 and the second wireless device 120 are denoted respectively. Among them, the first wireless device 110 and the second wireless device 120 are in communication connection and can perform data interaction. The wireless device can be a device or a chip supporting wireless communication, such as a device or a chip supporting WLAN. For example, the first wireless device 110 can be a communication entity such as a router, a switch, a bridge, etc. supporting WLAN, and the first wireless device 110 can also be a wireless local area network access point (AP) device, etc. The second wireless device 120 can be a mobile phone, a tablet computer, a smart home device, an Internet of Things node, a vehicle Internet of Things device, or an augmented reality (AR) / virtual reality (VR) device, a station (STA) device in a wireless local area network communication system, etc.

[0062] For example, taking a wireless local area network communication system as an example, Figure 1b For example, taking a wireless local area network communication system as an example, Figure 1b A wireless local area network communication system suitable for the signal processing method of the embodiments of the present application is shown. The first wireless device 110 can be an AP device, and the second wireless device 120 can be a STA device. The wireless local area network communication system includes at least one AP device and at least one STA device, Figure 1b Taking only one AP device and two STA devices as an example in the wireless local area network communication system, the network architecture of the wireless local area network communication system is shown. The AP device is a network element that provides services for stations, which can be an access point supporting the 802.11 series of protocols, and the STA device can be a station supporting the 802.11 series of protocols. With the evolution of technology, the AP device and the STA device can have other names, or other devices capable of implementing the functions of the AP and the STA, and the embodiments of the present application do not limit the names of the AP device and the STA device. Similarly, the first wireless device 110 and the second wireless device 120 can also have other names, and the embodiments of the present application do not limit this.

[0063] For example, for the AP device, the AP device can be configured with 2 service channels supporting the 2G frequency band and 2 service channels supporting the 5G frequency band. In addition, this type of AP device can also be described as a 2+2 type wireless device. The embodiments of the present application only take this type of wireless device as an example for introduction.

[0064] The network architecture and service scenarios described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0065] In order to facilitate understanding of the embodiments of the present application, the following first describes the terms involved in the embodiments of the present application. These descriptions are only for facilitating understanding of the embodiments of the present application, and should not constitute any limitation on the present application.

[0066] 1. Dynamic frequency selection (DFS)

[0067] WLAN starts to use 5GHz frequency from 802.11a standard. However, in some areas, such as Europe, strong resistance is encountered. Because the radar system in the area widely uses this frequency. In order to solve this safety concern, the WLAN products sold in the area support transmit power control (TPC) and DFS functions. Among them, TPC is to prevent the WLAN product from emitting too large power to interfere with the radar signal. DFS is the spectrum management mechanism introduced by 802.11h, which is to make the WLAN product actively detect the radar frequency, and actively select another frequency to avoid the radar frequency. In this way, the frequency used by other WLAN products can also be avoided, and the wavelength can be most efficiently utilized.

[0068] For example, taking the AP device in the WLAN product as an example, the principle of DFS backoff is introduced:

[0069] After the AP device detects the radar signal, it immediately backs off, that is, sets the channel on which the radar signal is detected as an unusable channel. The duration of which the channel is unusable can be 30 minutes (min). For the AP device, as a possible implementation manner, the AP device autonomously selects a channel from the idle available channels and switches to the channel. As another possible implementation manner, a controller can manage one or more AP devices. Among them, for a certain AP device, the AP device performs the following steps:

[0070] Step 1, determine whether there is an idle available channel, and in the case of an idle available channel, the AP device switches to one of the available channels.

[0071] Step 2, the AP device sends first information to the controller. Correspondingly, the controller receives the first information from the AP device.

[0072] Among them, the first information includes the channel information after the AP device switches.

[0073] For the controller, in a case that one controller can manage multiple AP devices, the controller can learn more transmission conditions of the channels, and the controller re-adjusts the channel to which the AP device switches based on the first information, so as to make the AP device switch to a channel with less interference.

[0074] For example, the controller obtains the interference values of multiple channels, and the controller determines a channel with the minimum interference value based on the learned interference values and the first information, so as to make the AP device switch to the channel.

[0075] Of course, in a case that there are two or more channels with the minimum interference value, the controller selects a channel based on a preset channel selection order, so as to make the AP device switch to the channel.

[0076] For example, the channel selection order includes: non-DFS channel > general DFS channel > weather DFS channel. Wherein, the non-DFS channel > general DFS channel means that in a case that the interference values of the non-DFS channel and the general DFS channel are the same, the non-DFS channel is selected preferentially. The general DFS channel > weather DFS channel means that in a case that the interference values of the general DFS channel and the weather DFS channel are the same, the general DFS channel is selected preferentially.

[0077] Wherein, the non-DFS channel refers to a channel that is not used for transmitting radar signals. The DFS channel refers to a channel that is used for transmitting radar signals. The DFS channel can also be referred to as a radar channel, and the DFS channel and the radar channel have the same meaning in the embodiments of the present application, and can be replaced with each other. In the embodiments of the present application, only the DFS channel is taken as an example for description. The DFS channel includes a weather DFS channel and a general DFS channel. The weather DFS channel refers to a DFS channel used for weather detection. The general DFS channel refers to a DFS channel except for the DFS channel used for weather detection and military use.

[0078] Which channels are DFS channels depends on the regulations of different regions. For example, the DFS channels in some countries include: 52-64, 100-116, 132-140. The weather DFS channel includes: 120-128. Other channels belong to non-DFS channels. The above channel numbers adopt the channel numbers specified by the institute of electrical and electronics engineers (IEEE).

[0079] For AP device, after AP device switches to new DFS channel, AP device needs to receive packet on new DFS channel first, and observe whether there is radar signal. If there is no radar signal, AP device will send packet normally after quiet period. For example, quiet period of general DFS channel is 60s, and quiet period of weather DFS channel is 600s. The detection performed in quiet period can be called CAC.

[0080] On the contrary, if there is radar signal, AP device switches to another channel, and restarts CAC. After original channel reaches unavailable duration, such as 30 minutes, if there is no other AP device connected, current AP device will try to switch back to original channel. Before switching back to original channel, AP device will do CAC again, and test for certain duration, such as 1 to 10 minutes, to ensure that original channel has no radar signal. Quiet duration refers to the time length set by AP device after switching to new channel, because whether the channel has radar signal is uncertain, and the time length is set to effectively avoid possible radar signal.

[0081] However, quiet causes business interruption.

[0082] 2、Zero-wait dynamic frequency selection (ZW-DFS)

[0083] In order to shorten quiet time, AP device detects non-working channel by using independent radio frequency chain. After working channel detects radar signal, because AP device has obtained information about whether non-working channel is available in advance, AP device can quickly switch to the channel which has been detected, and can perform normal WLAN business without CAC. The above process can be called ZW-DFS, which can reduce WLAN business interruption caused by CAC. The above radio frequency chain can be understood as transmission channel composed of antenna, coupling circuit, transmitting circuit and receiving circuit in radio frequency circuit, and baseband circuit, etc., to receive and transmit signal.

[0084] 3、Third radio

[0085] Third radio refers to radio frequency which can be used for independent scanning in WLAN business, in addition to two business radio frequencies, 2.4GHz radio 0 and 5 / 6GHz radio 1. In embodiments of the present application, if an AP device only includes one independent business radio frequency, another radio frequency which can be used for independent scanning of the AP device can also be called third radio.

[0086] The third radio requires to support at least one of the following: DFS, or ZW-DFS.

[0087] Next, four examples of supporting the third radio frequency are given (Examples 1 to 4 described below):

[0088] Example 1, third radio frequency of external radio-on-a-chip (RoC)

[0089] The wireless device uses two independent channels outside the four service channels to do the third radio frequency, and the number of service streams of the four service channels remains unchanged. In addition, this implementation is also called 4+2 mode. In the embodiments of the present application, the meanings of service channel and radio frequency channel are the same, and the two can be replaced with each other.

[0090] However, the implementation of Example 1 has high cost and complex structure. In addition, for the wireless device with four service channels, there are no two additional independent radio frequency channels, so it cannot support DFS, and it cannot reduce the possibility of CAC causing WLAN service interruption.

[0091] Example 2, using service channels for background services

[0092] The wireless device reconfigures the cell for the four service channels to make one of the four service channels used for background services, and the remaining three service channels still used for WLAN services. Among them, the service channel used for background services can be understood as receiving radar signals to make the wireless device perform CAC. The background service has only a receiving mode, and there are two states of receiving and closing, which are controlled by a control signal to switch the receiving state and the closing state. For example, see Figure 2 , the high level represents valid, and the low level represents invalid. The state of the three service channels used for WLAN services can be recorded as 3*3TX or 3*3RX. The state of the service channel used for background services can be recorded as DFS TX or DFS RX. It can be known from Figure 2 that before t1, the three service channels used for WLAN services are in a receiving state, and the service channel used for background services is also in a receiving state. Between t1 and t2, the three service channels used for WLAN services are in a transmitting state, and the service channel used for background services is in a closing state. Between t2 and t3, the three service channels used for WLAN services are in a receiving state, and the service channel used for background services is also in a receiving state. Between t3 and t4, the three service channels used for WLAN services are in a transmitting state, and the service channel used for background services is also in a closing state. In addition, in Figure 2 , the level of DFS TX is always low, that is, the service channel used for background services is always not in a transmitting mode. In addition, the implementation of Example 2 is also called 3+1 mode.

[0093] For the wireless device, ZW-DFS can be achieved by using one traffic channel for background traffic. However, the number of traffic channels for WLAN traffic is reduced. In this case, the number of traffic streams for the wireless device is reduced. And, when the three traffic channels for WLAN traffic are in a non-transmit state, the traffic channel for background traffic can only collect signals to achieve CAC. The DFS RX control signal is consistent with the 3*3 RX control signal, resulting in DFS performance being affected by WLAN traffic. When WLAN traffic is busy, the spectrum identification efficiency decreases, and the DFS false alarm probability increases. When the data transmission amount of WLAN traffic is large, the wireless device may not be able to perform background traffic, and ZW-DFS cannot be achieved.

[0094] Example 3, Time Division Multiplexing of Traffic Channels

[0095] The four traffic channels of the wireless device are used for WLAN traffic transmission at time 1 and for third radio traffic transmission at time 2. In example 3, the four traffic channels can be switched between different frequency points, such as receiving and transmitting WLAN traffic on different frequency points, or receiving and transmitting third radio traffic on different frequency points, to determine whether the current working channel or non-working channel has radar signals.

[0096] However, the implementation of example 3 is time division multiplexing of traffic channels, so it is not possible to reduce the possibility of CAC causing WLAN traffic interruption.

[0097] Example 4, Traffic Radio Online DFS

[0098] Traffic radio online DFS can be understood as time division multiplexing of traffic channels without frequency switching. For example, the four traffic channels of the wireless device are used for WLAN traffic transmission at time 1 and for third radio traffic transmission at time 2. In example 4, the four traffic channels only perform receiving and transmitting processing on the frequency point of the current working channel without switching frequency points.

[0099] However, the implementation of example 4 does not switch frequency points, so it is not possible to obtain the state of the non-working channel, and it is not possible to reduce the possibility of CAC causing WLAN traffic interruption.

[0100] In view of this, the embodiment of the present application provides a wireless device which can be used as the first wireless device 110 in the communication system 1000. The first wireless device 110 includes coupling circuitry, radio frequency circuitry and baseband circuitry. The coupling circuitry is configured to extract a part of the first transmission signal to obtain the feedback signal. The radio frequency circuitry includes a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit and a feedback circuit. The first local oscillator driving circuit is configured to provide a first local oscillator signal, and the frequency of the first local oscillator signal is the frequency of the first channel. The second local oscillator driving circuit is configured to provide a second local oscillator signal, and the frequency of the second local oscillator signal is the frequency of the second channel, wherein the second channel is different from the first channel. The transmitting circuit is configured to up-convert based on the first local oscillator signal to transmit the first transmission signal to the coupling circuitry on the first channel. The feedback circuit is configured to down-convert based on the first local oscillator signal to receive the feedback signal from the coupling circuitry, or down-convert based on the second local oscillator signal to receive a second reception signal of the second channel. The baseband circuitry is configured to receive the feedback signal or the second reception signal from the feedback circuit, and perform CAC on the second channel according to the second reception signal. In this way, the first wireless device 110 uses the feedback circuit to realize time-division multiplexing of the feedback signal and the second reception signal. When the feedback circuit transmits the second reception signal, the first wireless device 110 uses the feedback circuit to realize CAC on the second channel, so that the first wireless device 110 can complete CAC on the second channel before switching to the second channel. If the first wireless device 110 switches from the first channel to the second channel to transmit WLAN services, the first wireless device 110 does not need to perform CAC on the second channel again, and after switching to the second channel, the first wireless device 110 can use the second channel to transmit WLAN services, thereby reducing the possibility of WLAN service interruption caused by CAC. Moreover, compared with adding a set of special circuit for processing the second reception signal, the above scheme can reuse the processing capability of the feedback circuit, thereby reducing the complexity of the device.

[0101] In the following, the first wireless device 110 provided by the embodiment of the present application is introduced: Figure 3

[0102] ​The first wireless device 110 includes a coupling circuit 111, a radio frequency circuit 112, and a baseband circuit 113. The radio frequency circuit 112 includes at least a transmitting circuit 1121, a feedback circuit 1122, a first local oscillator (LO) driving circuit 1123, and a second LO driving circuit 1124. The baseband circuit 113 can be integrated into a system on a chip (SoC). The radio frequency circuit 112 can be integrated into a SoC or a radio frequency integrated circuit (RFIC). In the embodiments of the present application, only the radio frequency circuit 112 is integrated into the RFIC.

[0103] The connection relationship between each device or circuit is introduced as follows.

[0104] The coupling circuit 111 is connected with the transmitting circuit 1121. For example, in combination with Figures 4a to 4c The coupling circuit 111 is introduced as follows: the coupling circuit 111 can be a coupler or a coupling component. The coupler is a 4-port device. The 4 ports of the coupler are respectively denoted as a first port, a second port, a third port, and a fourth port. As shown in Figure 4a , the first port of the coupler is identified by ① in Figure 4a , the second port of the coupler is identified by ② in Figure 4a , the third port of the coupler is identified by ③ in Figure 4a , and the fourth port of the coupler is identified by ④ in Figure 4a . The working state of the coupling circuit 111 includes a Tx state and an Rx state. When the coupling circuit 111 is in the Tx state, it can be understood that the coupler is in the Tx state, as shown in Figure 4b . The first port (the port identified by ①) of the coupler is an input port, the second port (the port identified by ②) of the coupler is a through port relative to the first port as the input port, the third port (the port identified by ③) of the coupler is a coupled port relative to the first port as the input port, and the fourth port (the port identified by ④) of the coupler is an isolated port relative to the first port as the input port. When the coupling circuit 111 is in the Rx state, it can be understood that the coupler is in the Rx state, as shown in Figure 4cThe second port of the coupler (the port marked with ②) is the input port, the first port of the coupler (the port marked with ①) is the through port relative to the second port as the input port, the fourth port of the coupler (the port marked with ④) is the coupling port relative to the second port as the input port, and the third port of the coupler (the port marked with ③) is the isolation port relative to the second port as the input port.

[0105] It should be noted that the input port, the through port, the coupling port and the isolation port of the coupler are as follows: the input port can be understood as the port of the coupler receiving the input signal. The through port can be understood as the port of the coupler sending a part of the output signal. Among them, the signal energy output by the coupler through the through port accounts for most of the energy in the input signal, such as about 99% of the energy. The coupling port can be understood as the port of the coupler sending another part of the output signal. Among them, the signal energy output by the coupler through the coupling port accounts for a small part of the energy in the input signal, such as about 1% of the energy. The isolation port can be understood as the port of the coupler almost without signal output. Among them, the signal energy output by the coupler through the isolation port accounts for a very small part of the energy in the input signal, such as about 0.01% of the energy.

[0106] Figure 4b Only the case that the port marked with ① of the coupler is the input port is shown, Figure 4c Only the case that the port marked with ② of the coupler is the input port is shown. Of course, the third port (the port marked with ③) of the coupler can also be the input port, and correspondingly, the fourth port (the port marked with ④) of the coupler is the through port relative to the third port as the input port, the first port (the port marked with ①) of the coupler is the coupling port relative to the third port as the input port, and the second port (the port marked with ②) of the coupler is the isolation port relative to the third port as the input port. Or, of course, the fourth port (the port marked with ④) of the coupler can also be the input port, and correspondingly, the third port (the port marked with ③) of the coupler is the through port relative to the fourth port as the input port, the second port (the port marked with ②) of the coupler is the coupling port relative to the fourth port as the input port, and the first port (the port marked with ①) of the coupler is the isolation port relative to the fourth port as the input port.

[0107] For example, the coupling circuit 111 can be the coupler 2 or the coupler 3. Figure 7 (or Figure 8 ) as an example, the coupling circuit 111 can be the coupler 2 or the coupler 3.

[0108] For example, the introduction of the transmitting circuit 1121 is as follows: with Figure 7 or Figure 8For example, the transmitting circuit 1121 is integrated into the RFIC, and the transmitting circuit 1121 includes a channel 2 transmitting circuit or a channel 3 transmitting circuit in the RFIC. The channel 2 transmitting circuit in the RFIC is identified by a CH2 Tx block, and is denoted as a CH2 Tx circuit. The channel 3 transmitting circuit in the RFIC is identified by a CH3 Tx block, and is denoted as a CH3 Tx circuit.

[0109] For example, the first port (the port identified by ①) of the coupler 2 is connected to the CH2 Tx circuit in the RFIC via a radio frequency front-end module (FEM), and the first port (the port identified by ①) of the coupler 3 is connected to the CH3 Tx circuit in the RFIC via the FEM. Figure 7 Or Figure 8 For example, the first port (the port identified by ①) of the coupler 2 is connected to the CH2 Tx circuit in the RFIC via a radio frequency front-end module (FEM), and the first port (the port identified by ①) of the coupler 3 is connected to the CH3 Tx circuit in the RFIC via the FEM. Figure 7 And Figure 8 For example, only the 5GHz FEM is introduced as an example, and should not be understood as a limitation on the embodiments of the present application.

[0110] The coupling circuit 111 is also connected to a feedback circuit 1122. For example, the feedback circuit 1122 is introduced as follows: still taking Figure 7 And Figure 8 For example, the feedback circuit 1122 can include a channel 2 feedback circuit or a channel 3 feedback circuit in the RFIC. The channel 2 feedback circuit in the RFIC is identified by a CH2 FB block, and is denoted as a CH2 FB circuit. The channel 3 feedback circuit in the RFIC is identified by a CH3 FB block, and is denoted as a CH3 FB circuit. In the case where the coupling circuit 111 is the coupler 2, the third port (the port identified by ③) of the coupler 2 is connected to the CH2 FB circuit in the RFIC, and the third port (the port identified by ③) of the coupler 3 is connected to the CH3 FB circuit in the RFIC.

[0111] The transmitting circuit 1121 is also connected to a baseband circuit 113. For example, the baseband circuit 113 is introduced as follows: still taking Figure 7 And Figure 8For example, the baseband circuit 113 includes a digital front end channel 2 transmission (DFE CH2 Tx) circuit and an analog front end channel 2 transmission (AFE CH2 Tx) circuit. Alternatively, the baseband circuit 113 includes a DFE CH3 Tx circuit and an AFE CH3 Tx circuit. Among them, in the SoC, the DFE CH2 Tx circuit is identified by the box where the DFE CH2 Tx circuit is located, and the DFE CH3 Tx circuit is identified by the box where the DFE CH3 Tx circuit is located. The AFE CH2 Tx circuit is identified by the box where the AFE CH2 Tx circuit is located, and the AFE CH3 Tx circuit is identified by the box where the AFE CH3 Tx circuit is located. In the SoC, the circuit structure for transmitting WLAN service is as follows: the DFE CH2 Tx circuit and the AFE CH2 Tx circuit are connected, and the DFE CH3 Tx circuit and the AFE CH3 Tx circuit are connected. For example, taking the example that the transmitting circuit 1121 includes a CH2 Tx circuit in the RFIC, the CH2 Tx circuit in the RFIC (that is, the transmitting circuit 1121) is connected to the AFE CH2 Tx circuit through the MUX. For another example, taking the example that the transmitting circuit 1121 includes a CH3 Tx circuit in the RFIC, the CH3 Tx circuit in the RFIC (that is, the transmitting circuit 1121) is connected to the AFE CH3 Tx circuit through the MUX.

[0112] The feedback circuit 1122 is also connected to the baseband circuit 113. For example, the baseband circuit 113 is introduced as follows: still taking the example that the baseband circuit 113 includes a CH2 FB circuit in the RFIC, the CH2 FB circuit in the RFIC (that is, the feedback circuit 1122) is connected to the AFE FB circuit in the SoC through the MUX. For another example, taking the example that the transmitting circuit 1121 includes a CH3 FB circuit in the RFIC, the CH3 FB circuit in the RFIC (that is, the feedback circuit 1122) is connected to the AFE CH3 FB circuit in the SoC through the MUX. Figure 7 and Figure 8 For example, the baseband circuit 113 includes a digital pre-distortion feedback (DPD FB) circuit and an AFE FB circuit. Among them, in the SoC, the DPD FB circuit is identified by the box where the DPD FB circuit is located, and the AFE FB circuit is identified by the box where the AFE FB circuit is located. The circuit structure for CAC or DPD detection is as follows: the DPD FB circuit is connected to the AFE FB circuit. For example, taking the example that the feedback circuit 1122 includes a CH2 FB circuit in the RFIC, the CH2 FB circuit in the RFIC (that is, the feedback circuit 1122) is connected to the AFE FB circuit in the SoC through the MUX. For another example, taking the example that the transmitting circuit 1121 includes a CH3 FB circuit in the RFIC, the CH3 FB circuit in the RFIC (that is, the feedback circuit 1122) is connected to the AFE CH3 FB circuit in the SoC through the MUX.

[0113] Among them, the functions of each device or circuit are introduced as follows:

[0114] The coupling circuit 111 can have one or more functions. Among them, the coupling circuit 111 at least has function 1. The function 1 of the coupler is introduced as follows: the coupling circuit 111 is configured to extract a part of the first transmission signal to obtain a feedback signal. The first transmission signal is the transmission signal of the first channel. The first channel is configured to transmit WLAN services. The first transmission signal can be a signal obtained by processing service data of the WLAN service. The WLAN service can include voice service or video service, etc. For example, taking Figure 7 (or Figure 8 ) as an example, in the case where the coupling circuit 111 includes the coupler 2, the first transmission signal can be a signal received by the coupler 2 from the 5GHz FEM through the first port (the port marked with ①). The coupling circuit 111 (i.e. the coupler 2 in Figure 7 or Figure 8 ) extracts the first transmission signal to obtain the feedback signal. The ratio used when performing the extraction can be preset, for example, the extraction ratio can be 99:1. That is, 1% of the energy of the first transmission signal is separated as the feedback signal. The extraction ratio can also be other values, which are not limited by the embodiments of the present application.

[0115] The first local oscillator driving circuit 1123 is configured to provide a first local oscillator signal. The frequency of the first local oscillator signal is the frequency of the first channel. For example, still taking Figure 7 or Figure 8 as an example, the first local oscillator driving circuit 1123 can be the circuit in the solid line box where LO5 is located, to provide the first local oscillator signal. In other words, the working frequency band of the first local oscillator driving circuit 1123 includes the 5G frequency band, such as 5180MHz to 5885MHz. The frequency of the first local oscillator signal can receive the signal transmitted on the first channel. The first channel can refer to the introduction of function 1 of the coupling circuit 111, which will not be described here.

[0116] The second local oscillator driving circuit 1124 is configured to provide a second local oscillator signal. The frequency of the second local oscillator signal is the frequency of the second channel. For example, still taking Figure 7 or Figure 8 as an example, the second local oscillator driving circuit 1124 can be the circuit in the dashed line box where LO5 is located, to provide the second local oscillator signal. In other words, the working frequency band of the second local oscillator driving circuit 1124 at least includes the frequency band corresponding to the DFS channel, such as 5250MHz to 5730MHz. The frequency of the second local oscillator signal is different from the frequency of the first local oscillator signal. The frequency of the second local oscillator signal can receive the signal transmitted on the second channel. The second channel is different from the first channel. The second channel can be a DFS channel, which can be used to transmit radar DFS signals at a certain time.

[0117] It should be noted that the operating frequency bands of the first local oscillator driving circuit 1123 and the second local oscillator driving circuit 1124 overlap. The operating frequency bands overlap can be understood as any one of the following four cases:

[0118] Case 1, the operating frequency bands of the first local oscillator driving circuit 1123 and the second local oscillator driving circuit 1124 completely overlap.

[0119] Case 2, all operating frequency bands of the first local oscillator driving circuit 1123 belong to a part of the operating frequency bands of the second local oscillator driving circuit 1124.

[0120] Case 3, all operating frequency bands of the second local oscillator driving circuit 1124 belong to a part of the operating frequency bands of the first local oscillator driving circuit 1123.

[0121] Case 4, a part of the operating frequency bands of the first local oscillator driving circuit 1123 and a part of the operating frequency bands of the second local oscillator driving circuit 1124 overlap.

[0122] The transmitting circuit 1121 is configured to up-convert based on the first local oscillator signal provided by the first local oscillator driving circuit 1123 to transmit a first transmitting signal on a first channel to the coupling circuit 111. For example, still taking Figure 7 or Figure 8 as an example, when the transmitting circuit 1121 includes the CH2 Tx circuit in the RFIC, the coupling circuit 111 includes the coupler 2. After the transmitting circuit 1121 (such as the CH2 Tx circuit in the RFIC) receives the analog transmitting signal from the baseband circuit (such as the AFE CH2 Tx circuit in the SoC), the up-conversion processing is performed to obtain the first transmitting signal. The first transmitting signal belongs to a frequency band signal and is transmitted through the first channel. The transmitting circuit 1121 (such as the CH2 Tx circuit in the RFIC) transmits the first transmitting signal on the first channel to the first port (the port marked with ①) of the coupler 2. When the transmitting circuit 1121 includes the CH3 Tx circuit in the RFIC, the coupling circuit 111 includes the coupler 3. After the transmitting circuit 1121 (such as the CH3 Tx circuit in the RFIC) receives the analog transmitting signal from the baseband circuit (such as the AFE CH3 Tx circuit in the SoC), the up-conversion processing is performed to obtain the first transmitting signal, and the first transmitting signal is transmitted on the first channel to the first port (the port marked with ①) of the coupler 3.

[0123] The feedback circuit 1122 has two functions (i.e., function 1 and function 2 described below). The functions 1 and 2 are described as follows:

[0124] Action 1, the feedback circuit 1122 is configured to down-convert a first local oscillator signal provided by the first local oscillator driving circuit 1123 to receive a feedback signal from the coupling circuit 111. For example, still taking the case of the feedback circuit 1122 comprising the RFIC in CH2 FB circuit as an example, the coupling circuit 111 comprises the coupler 2, after the feedback circuit 1122 (e.g., the RFIC in CH2 FB circuit) receives the feedback signal from the third port (the port marked with ③) of the coupler 2, the feedback circuit 1122 performs down-conversion processing on the feedback signal to obtain a baseband signal corresponding to the feedback signal. In the case where the feedback circuit 1122 comprises the RFIC in CH3 FB circuit, the coupling circuit 111 comprises the coupler 3, after the feedback circuit 1122 (e.g., the RFIC in CH3 FB circuit) receives the feedback signal from the third port (the port marked with ③) of the coupler 3, the feedback circuit 1122 performs down-conversion processing on the feedback signal to obtain a baseband signal corresponding to the feedback signal. Figure 7 or Figure 8 For example, still taking the case of the feedback circuit 1122 comprising the RFIC in CH2 FB circuit as an example, the coupling circuit 111 comprises the coupler 2, after the feedback circuit 1122 (e.g., the RFIC in CH2 FB circuit) receives the feedback signal from the third port (the port marked with ③) of the coupler 2, the feedback circuit 1122 performs down-conversion processing on the feedback signal to obtain a baseband signal corresponding to the feedback signal. In the case where the feedback circuit 1122 comprises the RFIC in CH3 FB circuit, the coupling circuit 111 comprises the coupler 3, after the feedback circuit 1122 (e.g., the RFIC in CH3 FB circuit) receives the feedback signal from the third port (the port marked with ③) of the coupler 3, the feedback circuit 1122 performs down-conversion processing on the feedback signal to obtain a baseband signal corresponding to the feedback signal.

[0125] It should be noted that after the feedback circuit 1122 receives the feedback signal, the feedback circuit 1122 can transmit the feedback signal to the baseband circuit 113, so that the baseband circuit 113 performs DPD detection or channel correction according to the feedback signal. For details, please refer to the description of Action 2 and Action 3 of the baseband circuit 113, which will not be repeated here. That is, based on Action 1 of the feedback circuit 1122, the first wireless device 110 can perform DPD detection or channel correction to ensure normal transmission of WLAN services on the first channel. It is easy to understand that Action 1 of the feedback circuit 1122 is a function originally possessed by the feedback circuit 1122 itself.

[0126] When the transmit circuit 1121 is in the working state, the feedback circuit 1122 also does not need to always receive the feedback signal from the coupling circuit 111, that is, the feedback circuit 1122 can intermittently receive the feedback signal from the coupling circuit 111. For example, taking the case where the time period 1 comprises three consecutive sub-periods as an example, the transmit circuit 1121 is always in the working state in the time period 1. In the first and third sub-periods of the time period 1, the feedback circuit 1122 is configured to receive the feedback signal from the coupling circuit 111, that is, the feedback circuit 1122 is configured to implement Action 1 described above. In the second sub-period of the time period 1, the feedback circuit 1122 can not be configured to receive the feedback signal from the coupling circuit 111, that is, the feedback circuit 1122 is not configured to implement Action 1 described above.

[0127] When the transmit circuit 1121 is in the non-working state, the feedback circuit 1122 also does not need to receive the feedback signal from the coupling circuit 111. For example, taking the time period 2 as an example, the transmit circuit 1121 is always in the working state in the time period 2. Correspondingly, the feedback circuit 1122 also always does not receive the feedback signal from the coupling circuit 111 in the time period 2, that is, the feedback circuit 1122 does not implement Action 1 described above.

[0128] From the above, in some time period, the feedback circuit 1122 is used to implement the above-mentioned function 1, i.e., the feedback circuit 1122 is in the working state. In another time period, the feedback circuit 1122 is no longer used to implement the above-mentioned function 1. In this time period, if the feedback circuit 1122 is also not used to implement other functions, it is considered that the feedback circuit 1122 is in the idle state.

[0129] Function 2, the feedback circuit 1122 is used to down-convert based on the second local oscillator signal provided by the second local oscillator driving circuit 1124 to receive the second received signal of the second channel. For example, in the case where the feedback circuit 1122 includes the CH2 FB circuit or the CH3 FB circuit in the RFIC, after the feedback circuit 1122 (such as the CH2 FB circuit or the CH3 FB circuit in the RFIC) receives the radio frequency signal coupled by the antenna (antenna, Ant) 4, down-conversion processing is performed to obtain the part belonging to the second channel from the radio frequency signal coupled by the Ant 4, i.e., the above-mentioned second received signal. For another example, in the case where the feedback circuit 1122 includes the CH2 FB circuit in the RFIC, after the feedback circuit 1122 (such as the CH2 FB circuit in the RFIC) receives the radio frequency signal from the Ant 2, down-conversion processing is performed to obtain the part belonging to the second channel from the radio frequency signal coupled by the Ant 2, i.e., the above-mentioned second received signal. Figure 7 Figure 8 For another example, in the case where the feedback circuit 1122 includes the CH2 FB circuit in the RFIC, after the feedback circuit 1122 (such as the CH2 FB circuit in the RFIC) receives the radio frequency signal from the Ant 2, down-conversion processing is performed to obtain the part belonging to the second channel from the radio frequency signal coupled by the Ant 2, i.e., the above-mentioned second received signal.

[0130] It should be noted that after the feedback circuit 1122 receives the second received signal, the second received signal can be transmitted to the baseband circuit 113 to enable the baseband circuit 113 to perform CAC on the second channel according to the second received signal. For details, please refer to the introduction of function 1 of the baseband circuit 113, which will not be described here. That is, based on the function 2 of the feedback circuit 1122, the first wireless device 110 can implement CAC on the second channel. It is easy to understand that in order to enable the first wireless device 110 to perform CAC on the second channel in time, the function 2 of the feedback circuit 1122 is an additional function under the premise of not affecting the function 1, so that the transmission of the WLAN service of the first channel is not affected, and the CAC on the second channel can be performed in time.

[0131] From the above analysis, in some time period, the feedback circuit 1122 is no longer used to implement the above-mentioned function 1. In this case, the feedback circuit 1122 can be used to implement the above-mentioned function 2 to improve the utilization rate of the feedback circuit 1122. For example, still taking the case where the time period 1 includes three consecutive sub-time periods as an example, in the second sub-time period of the time period 1, the feedback circuit 1122 can be used to implement the above-mentioned function 2. For another example, still taking the time period 2 as an example, the feedback circuit 1122 can be used to implement the above-mentioned function 2 in the time period 2. ​

[0132] Therefore, for the feedback circuit 1122, the feedback circuit 2111 is used to implement function 1, and is not used to implement function 2. Alternatively, the feedback circuit 2111 is used to implement function 2, and does not need to implement function 1. In other words, the feedback circuit 1122 is used to down-convert based on the first local oscillator signal provided by the first local oscillator driving circuit 1123 to receive the feedback signal from the coupling circuit 111, and is not used to receive the second received signal. Alternatively, the feedback circuit 1122 is used to down-convert based on the second local oscillator signal provided by the second local oscillator driving circuit 1124 to receive the second received signal of the second channel, and does not need to receive the feedback signal.

[0133] The baseband circuit 113 has at least two functions (i.e., function 1 and function 2 described below). The functions 1 and 2 are described as follows.

[0134] Function 1: The baseband circuit 113 is configured to receive the second received signal from the feedback circuit 1122, and perform CAC on the second channel according to the second received signal. For example, still taking the case of Figure 7 or Figure 8 , the DFS module also belongs to the baseband circuit 113, and the DFS module is connected with the DPDFB circuit, and the DPDFB circuit is connected with the AFE FB circuit. In the case where the feedback circuit 1122 includes the RFIC CH2 FB circuit, the AFE FB circuit in the baseband circuit 113 receives the second received signal from the RFIC CH2 FB circuit (i.e., the feedback circuit 1122). Alternatively, in the case where the feedback circuit 1122 includes the RFIC CH3 FB circuit, the AFE FB circuit in the baseband circuit 113 receives the second received signal from the RFIC CH3 FB circuit (i.e., the feedback circuit 1122). In the baseband circuit 113, the second received signal is transmitted to the DFS module via the AFE FB circuit and the DPDFB circuit in the SoC, and the DFS module performs CAC on the second channel according to the second received signal.

[0135] It should be noted that the first wireless device 110 performs CAC on the second channel to detect whether the radar signal exists in the second channel, and the detection accuracy meets the requirements, for example, the radar signal detection accuracy is greater than a certain threshold. Compared with the silence duration, the first wireless device 110 can complete the CAC on the second channel in a few milliseconds, so that the feedback circuit 1122 can transmit the second received signal in the non-transmission period of the WLAN service, which realizes the CAC on the second channel and does not affect the normal transmission of the WLAN service of the first channel.

[0136] Function 2: The baseband circuit 113 is configured to receive the feedback signal from the feedback circuit 1122. For example, still taking the case of Figure 7 or Figure 8For example, in the case that the feedback circuit 1122 includes the CH2 FB circuit in the RFIC, the AFE FB circuit in the baseband circuit 113 receives the feedback signal from the CH2 FB circuit in the RFIC (i.e., the feedback circuit 1122). Alternatively, in the case that the feedback circuit 1122 includes the CH3 FB circuit in the RFIC, the AFE FB circuit in the baseband circuit 113 receives the feedback signal from the CH3 FB circuit in the RFIC (i.e., the feedback circuit 1122).

[0137] Optionally, the baseband circuit 113 further supports Action 3, which is described as follows.

[0138] Action 3, the baseband circuit 113 is further configured to perform DPD detection or channel correction according to the feedback signal. For example, in the baseband circuit 113, the second received signal is transmitted to the DFS module via the AFE FB circuit and the DPD FB circuit in the SoC, and the DFS module performs DPD detection or channel correction according to the feedback signal. The specific processing process can be referred to related technologies, and will not be described here.

[0139] Optionally, the baseband circuit 113 further includes a sample rate convertor (SRC). The SRC is connected with the feedback circuit 1122 and is configured to perform interface adaptation processing on the signal from the feedback circuit 1122. The interface adaptation processing includes at least one of sampling rate processing, bandwidth processing, and signal-to-noise ratio (SNR) processing. For example, still taking the case that the feedback circuit 1122 includes the CH2 FB circuit in the RFIC as an example, the second received signal is transmitted to the DFS module via the DPD FB circuit in the SoC, and the feedback signal is transmitted to the DFS module via the DPD FB circuit in the SoC. Figure 7 or Figure 8 For example, in the SoC, the DFS module is connected with the DPD FB circuit through the SRC. In the case that the feedback circuit 1122 includes the CH2 FB circuit in the RFIC, the second received signal is transmitted to the DFS module after being processed by the SRC after passing through the DPD FB circuit, or the feedback signal is transmitted to the DFS module after being processed by the SRC after passing through the DPD FB circuit, so that the signal processed by the SRC matches the interface of the DFS module, thereby ensuring that the DFS module successfully receives the signal.

[0140] Optionally, as shown in Figure 3 The radio frequency circuit 112 further includes a receiving circuit 1125.

[0141] The circuit connection structure of the receiving circuit 1125 is described as follows.

[0142] The receiving circuit 1125 is connected with the coupling circuit 111. For example, the receiving circuit 1125 is described as follows: still taking the case that the feedback circuit 1122 includes the CH2 FB circuit in the RFIC as an example. Figure 7 and Figure 8For example, the receiving circuit 1125 can include a channel 2 receiving circuit or a channel 3 receiving circuit in the RFIC. Among them, the channel 2 receiving circuit in the RFIC is identified by the CH2 Rx block, and is recorded as CH2 Rx circuit. The channel 3 receiving circuit in the RFIC is identified by the CH3 Rx block, and is recorded as CH3 Rx circuit. In the case where the coupling circuit 111 includes a coupler 2, the third port (the port marked with ③) of the coupler 2 is connected with the CH2 Rx circuit in the RFIC, and the third port (the port marked with ③) of the coupler 3 is connected with the CH3 Rx circuit in the RFIC.

[0143] The receiving circuit 1125 is also connected with the baseband circuit 113. For example, the baseband circuit 113 is introduced as follows: still taking the case where the receiving circuit 1125 includes the CH2 Rx circuit in the RFIC as an example, the CH2 Rx circuit in the RFIC (i.e. the feedback circuit 1122) is connected with the AFE CH2 Rx circuit in the SoC through the MUX. Figure 7 and Figure 8 For example, the baseband circuit 113 includes a digital front end channel 2 receiving (DFE CH2 Rx) circuit and a DFE CH3 Rx circuit. Alternatively, the baseband circuit 113 includes an analog front end channel 2 receiving (AFE CH2 Rx) circuit and an AFE CH3 Rx circuit. Among them, in the SoC, the DFE CH2 Rx circuit is identified by the DFE CH2 Rx block, and the DFE CH3 Rx circuit is identified by the DFE CH3 Rx block. The AFE CH2 Rx circuit is identified by the AFE CH2 Rx block, and the AFE CH3 Rx circuit is identified by the AFE CH3 Rx block. In the SoC, the circuit structure for receiving WLAN service is as follows: the DFE CH2 Rx circuit is connected with the AFE CH2 Rx circuit, and the DFE CH3 Rx circuit is connected with the AFE CH3 Rx circuit. For example, taking the case where the receiving circuit 1125 includes the CH2 Rx circuit in the RFIC as an example, the CH2 Rx circuit in the RFIC (i.e. the feedback circuit 1122) is connected with the AFE CH2 Rx circuit in the SoC through the MUX. For another example, taking the case where the receiving circuit 1125 includes the CH3 Rx circuit in the RFIC as an example, the CH3 Rx circuit in the RFIC (i.e. the feedback circuit 1122) is connected with the AFE CH3 Rx circuit in the SoC through the MUX.

[0144] Among them, the role of the receiving circuit 1125 is introduced as follows: the receiving circuit 1125 is used to down-convert based on the first local oscillator signal provided by the first local oscillator driving circuit 1123, so as to receive the part belonging to the first channel in the antenna-coupled radio frequency signal. For example, taking the case where the receiving circuit 1125 includes the CH2 Rx circuit in the RFIC as an example, the CH2 Rx circuit in the RFIC (i.e. the feedback circuit 1122) is connected with the AFE CH2 Rx circuit in the SoC through the MUX. Figure 7 or Figure 8For example, in the case that the receiving circuit 1125 includes the CH2 Rx circuit in the RFIC, after the receiving circuit 1125 (such as the CH2 Rx circuit in the RFIC) receives the radio frequency signal coupled by the Ant2, the down-conversion processing is performed to obtain the part belonging to the first channel from the radio frequency signal coupled by the Ant2, i.e., the first received signal of the first channel. In the case that the receiving circuit 1125 includes the CH3 Rx circuit in the RFIC, after the receiving circuit 1125 (such as the CH3 Rx circuit in the RFIC) receives the radio frequency signal coupled by the Ant3, the down-conversion processing is performed to obtain the part belonging to the first channel from the radio frequency signal coupled by the Ant3, i.e., the first received signal of the first channel.

[0145] It should be noted that the Ant2 and the Ant3 are described as the first antenna 1141 in the following mode 1, and the Ant2 and the Ant3 are described as the third antenna 1151 in the following mode 2, which will be described in detail in the modes 1 and 2, and will not be described here.

[0146] Optionally, for the second received signal received by the feedback circuit 1122, the following describes the acquisition process of the second received signal in combination with the modes 1 and 2:

[0147] The mode 1, as shown in Figure 5a , on the basis of Figure 3 , the first wireless device 110 further includes a first antenna 1141, a second antenna 1142, and a first switch 1143.

[0148] The first antenna 1141, the second antenna 1142, and the first switch 1143 are introduced as follows in terms of circuit structure:

[0149] The first antenna 1141 is connected with the transmitting circuit 1121 via the coupling circuit 111. For example, Figure 7 For example, the first antenna 1141 can include the Ant2 or the Ant3. In the case that the first antenna 1141 includes the Ant2, the coupling circuit 111 includes the coupler 2, and the transmitting circuit 1121 includes the CH2 Tx circuit in the RFIC. As shown in Figure 7 , the Ant2 is connected with the CH2 Tx circuit in the RFIC via the diplexer 2 and the coupler 2. The first port (the port marked with ①) of the coupler 2 is connected with the CH2 Tx circuit in the RFIC, and the second port (the port marked with ②) of the coupler 2 is connected with the diplexer 2. In the case that the first antenna 1141 includes the Ant3, the coupling circuit 111 includes the coupler 3, and the transmitting circuit 1121 includes the CH3 Tx circuit in the RFIC. As shown in Figure 7As shown, Ant3 is connected with the CH3 Tx circuit in the RFIC via the duplexer 3 and the coupler 3. The first port (the port marked with ①) of the coupler 3 is connected with the CH3 Tx circuit in the RFIC, and the second port (the port marked with ②) of the coupler 3 is connected with the duplexer 3.

[0150] The second antenna 1142 is connected with the feedback circuit 1122 via the first switch 1143. For example, still taking Figure 7 as an example, the second antenna 1142 can include Ant4. The first switch 1143 can implement the function of a single-pole multiple-throw switch, and the first switch 1143 can include the switch 20 or the switch 30. In the case where the first switch 1143 includes the switch 20, the feedback circuit 1122 includes the CH2 FB circuit in the RFIC. As shown, Figure 7 the CH2 FB circuit in the RFIC is connected with the CH2 Tx circuit in the RFIC via the switch 20. In the case where the first switch 1143 includes the switch 30, the feedback circuit 1122 includes the CH3 FB circuit in the RFIC. As shown, Figure 7 the CH3 FB circuit in the RFIC is connected with the CH3 Tx circuit in the RFIC via the switch 30.

[0151] In Figure 5a , the feedback circuit 1122 is connected with the coupling circuit 111 via the first switch 1143. For example, still taking Figure 7 as an example, in the case where the feedback circuit 1122 includes the CH2 FB circuit in the RFIC, the first switch 1143 includes the switch 20 in Figure 7 , and the coupling circuit 111 includes the coupler 2 in Figure 7 . As shown, Figure 7 the CH2 FB circuit in the RFIC is connected with the third port (the port marked with ③) of the coupler 2 via the switch 20. In the case where the feedback circuit 1122 includes the CH3 FB circuit in the RFIC, the first switch 1143 includes the switch 30 in Figure 7 , and the coupling circuit 111 includes the coupler 3 in Figure 7 . As shown, Figure 7 the CH3 FB circuit in the RFIC is connected with the third port (the port marked with ③) of the coupler 3 via the switch 30.

[0152] The roles of the first antenna 1141, the second antenna 1142 and the first switch 1143 are introduced as follows:

[0153] The first antenna 1141 is used to send the first sending signal after the extraction processing. For example, still taking Figure 7For example, in the case that the first antenna 1141 includes Ant2, the coupling circuit 111 includes a coupler 2. A first port (the port marked with ①) of the coupler 2 is used to receive the first transmission signal from the transmitting circuit 1121, and the coupler 2 is used to extract a part of the first transmission signal. Among them, the coupler 2 extracts the first transmission signal before processing, which can be recorded as signal A1, and the coupler 2 extracts the first transmission signal after processing, which can be recorded as signal A2. As shown in Figure 7 , a second port (the port marked with ②) of the coupler 2 sends the signal A2 to Ant2 through the duplexer 2, and Ant2 sends the signal A2 to the second wireless device 120. In the case that the first antenna 1141 includes Ant3, the coupling circuit 111 includes a coupler 3. A first port (the port marked with ①) of the coupler 3 is used to receive the first transmission signal from the transmitting circuit 1121, and the coupler 3 is used to extract a part of the first transmission signal. Among them, the coupler 3 extracts the first transmission signal before processing, which can be recorded as signal B1, and the coupler 3 extracts the first transmission signal after processing, which can be recorded as signal B2. As shown in Figure 7 , a second port (the port marked with ②) of the coupler 3 sends the signal B2 to Ant3 through the duplexer 3, and Ant3 sends the signal B2 to the second wireless device 120.

[0154] The second antenna 1142 is used to receive the second reception signal. For example, still taking Figure 7 as an example, the second antenna 1142 includes Ant4. Ant4 is used to couple radio frequency signals. Among them, the radio frequency signals coupled by Ant4 include the second reception signal.

[0155] The first switch 1143 is used to select the feedback signal or the second reception signal to transmit the selected signal to the feedback circuit 1122.

[0156] For example, still taking Figure 7 as an example, in the case that the first switch 1143 includes the switch 20 in Figure 7 , if the switch 20 is connected with the third port (the port marked with ③) of the coupler 2 and disconnected with the second antenna 1142 (i.e. Ant4), it means that the switch 20 selects the feedback signal extracted by the coupler 2 (i.e. the coupling circuit 111). In this way, the coupler 2 sends the feedback signal to the feedback circuit 1122 through the third port (the port marked with ③) of itself. If the switch 20 is disconnected with the third port (the port marked with ③) of the coupler 2 and connected with the second antenna 1142 (i.e. Ant4), it means that the switch 20 selects the second reception signal received by the second antenna (i.e. Ant4). In this way, the second antenna (i.e. Ant4) sends the second reception signal to the feedback circuit 1122.

[0157] For example, still taking Figure 7 as an example, in the case that the first switch 1143 includesFigure 7 In the case of the switch 30 in the coupling circuit 111, if the switch 30 is connected with the third port (the port marked with ③) of the coupler 3 and disconnected with the second antenna 1142 (i.e., Ant4), it indicates that the switch 30 selects the feedback signal extracted by the coupler 3 (i.e., the coupling circuit 111). In this way, the coupler 3 sends the feedback signal to the feedback circuit 1122 through the third port (the port marked with ③) of the coupler 3. If the switch 30 is disconnected with the third port (the port marked with ③) of the coupler 3 and connected with the second antenna 1142 (i.e., Ant4), it indicates that the switch 30 selects the second received signal received by the second antenna (i.e., Ant4). In this way, the second antenna (i.e., Ant4) sends the second received signal to the feedback circuit 1122.

[0158] It should be noted that the first switch 1143 is connected with the third port (the port marked with ③) of the coupling circuit 111 in the first time period and disconnected with the second antenna 1142 (i.e., Ant4) in the coupling circuit 111 to select the feedback signal. The first switch 1143 is disconnected with the third port (the port marked with ③) of the coupling circuit 111 in the second time period and connected with the second antenna 1142 (i.e., Ant4) in the coupling circuit 111 to select the second received signal. The first time period and the second time period are different. Figure 7 Figure 7 In the first time period, if the transmitting circuit 1121 is always in the working state, the coupling circuit 111 is always in the Tx state, and the first antenna 1141 sends the first transmitted signal after the extraction processing. Since the first switch 1143 is connected with the third port (the port marked with ③) of the coupling circuit 111 in the first time period, the feedback circuit 1122 can receive the feedback signal from the coupling circuit 111 in different sub-periods of the first time period, i.e., the feedback circuit 1122 is used to realize the role 1 of itself.

[0159] In the first time period, if the transmitting circuit 1121 is always in the non-working state, the coupling circuit 111 is always in the non-Tx state. Even if the first switch 1143 is connected with the third port (the port marked with ③) of the coupling circuit 111 in the first time period, the feedback circuit 1122 cannot receive the feedback signal from the coupling circuit 111, i.e., the feedback circuit 1122 is not used to realize the role 1 of itself. Of course, during this period, the coupling circuit 111 can be in the Rx state, which can be referred to the description of the receiving circuit 1125 in the working state in the second time period, i.e., the feedback circuit 1122 can be used to realize the role 2 of itself, which will not be described here.

[0160] In the first time period, the feedback circuit 1122 can be used to realize the role 1 of itself. Since the first switch 1143 is connected with the second antenna 1142 (i.e., Ant4) in the first time period, the feedback circuit 1122 can receive the second received signal from the second antenna (i.e., Ant4) in different sub-periods of the first time period, i.e., the feedback circuit 1122 is used to realize the role 2 of itself.

[0161] In the first time period, the feedback circuit 1122 can be used to realize the role 1 of itself. Since the first switch 1143 is connected with the second antenna 1142 (i.e., Ant4) in the first time period, the feedback circuit 1122 can receive the second received signal from the second antenna (i.e., Ant4) in different sub-periods of the first time period, i.e., the feedback circuit 1122 is used to realize the role 2 of itself. Figure 5b ​When Ant4 is disconnected, the first switch 1143 is not used to transmit the signal coupled to the second antenna 1142 to the feedback circuit 1122. Therefore, the feedback circuit 1122 cannot obtain the second received signal of the second channel, that is, the feedback circuit 1122 is not used to realize its own function 2.

[0162] During the second time period, if the transmitting circuit 1121 is always in the active state, the coupling circuit 111 is always in the Tx state, and the first antenna 1141 transmits the first transmitted signal after extraction and processing. Conversely, if the transmitting circuit 1121 is always in the inactive state, the coupling circuit 111 is always in the non-Tx state, and the first antenna 1141 does not transmit the first transmitted signal after extraction and processing. Of course, during this period, the coupling circuit 111 can be in the Rx state; for details, please refer to the description of the receiving circuit 1125 being in the active state during the second time period, which will not be repeated here.

[0163] During the second time period, because the first switch 1143 is disconnected from the third port (port marked ③) of the coupling circuit 111, the feedback circuit 1122 cannot receive signals from the coupling circuit 111, that is, the feedback circuit 1122 cannot perform its function 1, and the first wireless device 110 cannot perform DPD detection and channel correction. However, because the first switch 1143 is disconnected from the second antenna 1142 (e.g., ...) during the second time period, the feedback circuit 1122 cannot receive signals from the coupling circuit 111, that is, the feedback circuit 1122 cannot perform its function 1, and the first wireless device 110 cannot perform DPD detection and channel correction. Figure 5a The second antenna 1142 can also couple radio frequency signals, so the first switch 1143 is used to transmit the signal coupled to the second antenna 1142 to the feedback circuit 1122, so that the feedback circuit 1122 can perform down-conversion based on the second local oscillator signal provided by the second local oscillator drive circuit 1124, and obtain the second received signal of the second channel from the signal coupled to the second antenna 1142. That is, the feedback circuit 1122 realizes its own function 2, and the first wireless device 110 can also perform CAC on the second signal.

[0164] Therefore, the feedback circuit 1122 can be time-division multiplexed. Since the first antenna 1141 and the second antenna 1142 are different antennas, the transmitting circuit 1121 and the feedback circuit 1122 can not share the same coupling circuit during certain time periods, as described above in the second time period when the transmitting circuit 1121 is in the working state. During this period, the transmission of WLAN services on the first channel and the CAC on the second channel do not affect each other. That is to say, in mode 1, the first wireless device 110 can ensure the normal transmission of WLAN services on the first channel while also performing CAC on the second channel.

[0165] During the first time period, if the receiving circuit 1125 is always in the working state, the coupling circuit 111 is always in the Rx state. The radio frequency signal coupled to the first antenna 1141 can be transmitted to the receiving circuit 1125 through the first port (port marked ①) of the coupling circuit 111, so that the receiving circuit 1125 performs down-conversion based on the first local oscillator signal provided by the first local oscillator driving circuit 1123 to receive the portion of the radio frequency signal coupled to the first antenna 1141 that belongs to the first channel. Since the coupling circuit 111 is always in the Rx state, the third port (port marked ③) of the coupling circuit 111 acts as an isolation port, and the output signal energy is extremely weak. Even if the first switch 1143 is connected to the third port (port marked ③) of the coupling circuit 111 during the first time period, it can be considered that the feedback circuit 1122 does not receive a feedback signal from the coupling circuit 111, that is, the feedback circuit 1122 cannot perform its function 1. However, during this period, the feedback circuit 1122 can perform its function 2, as detailed in the description of the receiving circuit 1125 being always in the working state during the second time period, which will not be repeated here.

[0166] During the second time period, if the receiving circuit 1125 is always in the working state, the coupling circuit 111 is always in the Rx state. The radio frequency signal coupled to the first antenna 1141 can be transmitted to the receiving circuit 1125 through the first port (the port marked ①) of the coupling circuit 111, so that the receiving circuit 1125 performs down-conversion based on the first local oscillator signal provided by the first local oscillator driving circuit 1123, so as to receive the part of the radio frequency signal coupled to the first antenna 1141 that belongs to the first channel.

[0167] During the second time period, since the first switch 1143 is always connected to the second antenna 1142 (e.g. Figure 7 The first switch 1143 is used to transmit the signal coupled to the second antenna 1142 to the feedback circuit 1122, so that the feedback circuit 1122 performs down-conversion based on the second local oscillator signal provided by the second local oscillator drive circuit 1124, and obtains the second received signal of the second channel from the signal coupled to the second antenna 1142. That is, the feedback circuit 1122 realizes its own function 2, and the first wireless device 110 can also perform CAC on the second signal.

[0168] Therefore, when the receiving circuit 1125 is always in operation, the feedback circuit 1122 cannot perform its function 1, but it can perform its function 2. Since the first antenna 1141 and the second antenna 1142 are different antennas, the receiving circuit 1125 and the feedback circuit 1122 can not share the same coupling circuit during certain periods, as described above in the second period when the receiving circuit 1125 is in operation. Therefore, the reception of WLAN services on the first channel and the CAC on the second channel do not affect each other. That is to say, in mode 1, the first wireless device 110 can ensure normal reception of WLAN services on the first channel while also performing CAC on the second channel.

[0169] In other words, the first wireless device 110 receives the second received signal from the second channel by adding a second antenna 1142, without affecting the signal transmission and reception processing of the first channel. Furthermore, the first switch 1143 controls which signal between the feedback signal and the second received signal to select, thereby enabling the feedback circuit 1122 to achieve time-division multiplexing.

[0170] Furthermore, in method 1, the number of feedback circuits 1122 is at least two, and the number of second antennas 1142 is one. For example... Figure 7 As shown, in Figure 7 Based on this, the first wireless device 110 also includes a second switch 1144, which is connected to the second antenna 1142. For example, still using... Figure 6a For example, the number of feedback circuits 1122 is two, that is... Figure 3 The RFIC contains CH2FB and CH3FB circuits. The second switch 1144 includes a 2-to-1 multiplexer (MUX), such as... Figure 8 Switch 40 is used in the RFIC. If switch 40 controls the second antenna 1142 (Ant4) to be connected to switch 20 and disconnected from switch 30, then when switch 20 is closed, the second antenna 1142 is connected to the CH2 FB circuit in the RFIC through switch 20. Thus, after receiving the second receive signal, the second antenna (Ant4) sends the second receive signal to the CH2 FB circuit in the RFIC. If switch 40 controls the second antenna 1142 (Ant4) to be disconnected from switch 20 and connected to switch 30, then when switch 30 is closed, the second antenna 1142 is connected to the CH3 FB circuit in the RFIC through switch 30. Thus, after receiving the second receive signal, the second antenna (Ant4) sends the second receive signal to the CH3 FB circuit in the RFIC.

[0171] It should be noted that the input / output (IO) interface of the RFIC is connected with the second switch 1144 through a general-purpose input / output (GPIO) interface. The switching control signal of the second switch 1144 can be transmitted through a lead line of the GPIO interface to control the second switch 1144 to switch the working state, so as to select a relatively idle feedback circuit 1122 from the at least two feedback circuits 1122, and transmit the second receiving signal to the selected feedback circuit 1122, thereby improving the signal transmission flexibility.

[0172] Mode 2, as shown in Figure 6a , on the basis of Figure 6a , the first wireless device 110 further includes a third antenna 1151 and a third switch 1152.

[0173] Among them, the third antenna 1151 and the third switch 1152 are introduced as follows in terms of circuit structure:

[0174] The third antenna 1151 is connected with the coupling circuit 111. For example, taking Figure 4a as an example, the third antenna 1151 can include Ant2 or Ant3. In the case where the third antenna 1151 includes Ant2, the coupling circuit 111 includes a coupler 2. Ant2 (i.e. the third antenna 1151 in Figure 6a ) is connected with the second port (the port marked with ② in Figure 6a ) of the coupler 2 (i.e. the coupling circuit 111 in Figure 4a ) through the duplexer 2. In the case where the third antenna 1151 includes Ant3, the coupling circuit 111 includes a coupler 3. Ant3 (i.e. the third antenna 1151 in Figure 6b ) is connected with the second port (the port marked with ② in Figure 6c ) of the coupler 3 (i.e. the coupling circuit 111 in Figure 6b ) through the duplexer 3.

[0175] The coupling circuit 111 is connected with the feedback circuit 1122 via the third switch 1152. For example, first introduce the third switch 1152 in combination with Figure 6c and Figure 8 : The third switch 1152 includes a two-way MUX. The third switch 1152 includes three ports, which are respectively marked as A port, B port and C port. Among them, the A port of the third switch 1152 is connected with the feedback circuit 1122 through the 5GHz FEM, the B port of the third switch 1152 is connected with the third port (i.e. the port marked with ③) of the coupling circuit 111, and the C port of the third switch 1152 is used to be connected with the fourth port (i.e. the port marked with ④) of the coupling circuit 111. Figure 8In the Tx state, the B port of the third switch 1152 is connected with the third port (i.e., the port marked with ③) of the coupling circuit 111, for transmitting the feedback signal, and the C port of the third switch 1152 is disconnected with the fourth port (i.e., the port marked with ④) of the coupling circuit 111, and no longer transmits the signal. Figure 6b In the Rx state, the B port of the third switch 1152 is connected with the third port (i.e., the port marked with ③) of the coupling circuit 111, but the third port of the coupling circuit 111 is an isolation port, and the output signal energy is extremely weak. The C port of the third switch 1152 is connected with the fourth port (i.e., the port marked with ④) of the coupling circuit 111, for transmitting the extracted signal.

[0176] It should be noted that in the mode 2, the coupling circuit 111 also supports the function 2. In the function 2, the coupling circuit 111 is used to extract a part of the radio frequency signal coupled by the third antenna 1152 to obtain an extracted signal. For example, still taking the example of the coupling circuit 111 including the coupler 2, in the case of the coupler 2, after the coupler 2 (i.e., the coupling circuit 111) receives the radio frequency signal coupled by Ant2 through the second port (i.e., the port marked with ②), the coupler 2 (i.e., the coupling circuit 111) extracts the radio frequency signal coupled by Ant2 to obtain the extracted signal.

[0177] In the function 2, the coupling circuit 111 is used to extract a part of the radio frequency signal coupled by the third antenna 1152 to obtain an extracted signal. For example, still taking the example of the coupling circuit 111 including the coupler 2, in the case of the coupler 2, after the coupler 2 (i.e., the coupling circuit 111) receives the radio frequency signal coupled by Ant2 through the second port (i.e., the port marked with ②), the coupler 2 (i.e., the coupling circuit 111) extracts the radio frequency signal coupled by Ant2 to obtain the extracted signal. Figure 8 Figure 6b In the case of the coupler 3, after the coupler 3 (i.e., the coupling circuit 111) receives the radio frequency signal coupled by Ant3 through the second port (i.e., the port marked with ②), the coupler 3 (i.e., the coupling circuit 111) extracts the radio frequency signal coupled by Ant3 to obtain the extracted signal. Figure 8 Figure 6b In the case of the coupler 3, after the coupler 3 (i.e., the coupling circuit 111) receives the radio frequency signal coupled by Ant3 through the second port (i.e., the port marked with ②), the coupler 3 (i.e., the coupling circuit 111) extracts the radio frequency signal coupled by Ant3 to obtain the extracted signal. Figure 6b

[0178] In the case of the coupler 3, after the coupler 3 (i.e., the coupling circuit 111) receives the radio frequency signal coupled by Ant3 through the second port (i.e., the port marked with ②), the coupler 3 (i.e., the coupling circuit 111) extracts the radio frequency signal coupled by Ant3 to obtain the extracted signal. Figure 6c Figure 6c In the case of the coupler 3, after the coupler 3 (i.e., the coupling circuit 111) receives the radio frequency signal coupled by Ant3 through the second port (i.e., the port marked with ②), the coupler 3 (i.e., the coupling circuit 111) extracts the radio frequency signal coupled by Ant3 to obtain the extracted signal. Figure 8 In the case of the coupler 3, after the coupler 3 (i.e., the coupling circuit 111) receives the radio frequency signal coupled by Ant3 through the second port (i.e., the port marked with ②), the coupler 3 (i.e., the coupling circuit 111) extracts the radio frequency signal coupled by Ant3 to obtain the extracted signal. Figure 6d ​​​​In the circuit, port B of the third switch 1152 is connected to the third port (i.e., port marked ③) of the coupling circuit 111, and port C of the third switch 1152 is connected to the fourth port (i.e., port marked ④) of the coupling circuit 111. Figure 6e The connection state of the third switch 1152 can be understood as the third switch 1152 selecting to extract a signal. Since port A of the third switch 1152 is also connected to the feedback circuit 1122, the selected signal can be transmitted to the feedback circuit 1122.

[0179] In mode 2, the function 2 of the feedback circuit 1122 specifically includes: the feedback circuit 1122 is used to down-convert the second local oscillator signal provided by the second local oscillator drive circuit 1124 to receive the second received signal of the second channel from the extracted signal.

[0180] It should be noted that the third switch 1152 is connected to the third port (port marked ③) of the coupling circuit 111 in the third time period, and disconnected from the fourth port (port marked ④) of the coupling circuit 111 to select the feedback signal. The third switch 1152 is disconnected from the third port (port marked ③) of the coupling circuit 111 in the fourth time period, and connected to the fourth port (port marked ④) of the coupling circuit 111 to select the extracted signal. The third and fourth time periods are different.

[0181] During the third time period, if the transmitting circuit 1121 is always in the working state, the coupling circuit 111 is always in the Tx state, and the third antenna 1141 transmits the first transmitted signal after extraction and processing. Since the third switch 1152 is connected to the third port (the port marked ③) of the coupling circuit 111 during the third time period, the feedback circuit 1122 can receive feedback signals from the coupling circuit 111 in different sub-time periods of the third time period, that is, the feedback circuit 1122 is used to realize its own function 1.

[0182] During the third time period, if the transmitting circuit 1121 remains in a non-operating state, the coupling circuit 111 remains in a non-Tx state. Even if the third switch 1152 is connected to the third port (the port marked ③) of the coupling circuit 111 during the third time period, the feedback circuit 1122 cannot receive a feedback signal from the coupling circuit 111, meaning the feedback circuit 1122 is not used to perform its function 1. Of course, during this period, the coupling circuit 111 can be in the Rx state, as detailed in the description of the receiving circuit 1125 being in an operating state during the fourth time period, meaning the feedback circuit 1122 can be used to perform its function 2, which will not be elaborated here.

[0183] In the third time period, the feedback circuit 1122 can be used to implement its own function 1. Since the third switch 1152 is disconnected from the fourth port (the port marked with ④) of the coupling circuit 111, i.e., the third switch 1152 is not used to transmit the extracted signal to the feedback circuit 1122, the feedback circuit 1122 cannot obtain the second received signal of the second channel, i.e., the feedback circuit 1122 is not used to implement its own function 2.

[0184] In the fourth time period, if the transmitting circuit 1121 is in the non-working state, the coupling circuit 111 is always in the non-Tx state. Since the third switch 1152 is disconnected from the third port (the port marked with ③) of the coupling circuit 111 in the fourth time period, the feedback circuit 1122 cannot receive the feedback signal from the coupling circuit 111, i.e., the feedback circuit 1122 cannot implement its own function 1, and the first wireless device 110 cannot implement the DPD detection and channel correction. Of course, during this period, the coupling circuit 111 can be in the Rx state, which can be seen from the description of the receiving circuit 1125 in the working state in the fourth time period, i.e., the feedback circuit 1122 can be used to implement its own function 2, which will not be described herein again.

[0185] Therefore, in the mode 2, the first wireless device 110 does not increase an additional antenna, since the transmitting circuit 1121 and the feedback circuit 1122 always share the same coupling circuit, when the WLAN service of the first channel needs to be transmitted, the first wireless device 110 preferentially transmits the first transmitting signal through the transmitting circuit 1121 and the coupling circuit 111. During this period, the feedback circuit 1122 is used to implement its own function 1 to ensure the normal transmission of the WLAN service of the first channel. In other time periods, the first wireless device 110 receives the second received signal through the feedback circuit 1122 and the coupling circuit 111. During this period, the first wireless device 110 is used to couple the radio frequency signal, and the feedback circuit 1122 is used to implement its own function 2 to perform the CAC on the second channel. That is, in the mode 2, the first wireless device 110 preferentially ensures the normal transmission of the WLAN service of the first channel, and can perform the CAC on the second channel without affecting the transmission of the WLAN service of the first channel.

[0186] In the case where the radio frequency circuit 112 includes the receiving circuit 1125, the receiving circuit 1125 is used to perform frequency down-conversion based on the first local oscillator signal provided by the first local oscillator driving circuit 1123, to receive the part of the radio frequency signal coupled by the third antenna 1151 (such as Ant2 or Ant3 in FIG. 11B) belonging to the first channel, i.e., the first received signal. Figure 6e

[0187] ​In the third time period, if the receiving circuit 1125 is always in the working state, the coupling circuit 111 is always in the Rx state, and the radio frequency signal coupled to the third antenna 1151 can be transmitted to the receiving circuit 1125 through the first port (the port marked with ①) of the coupling circuit 111, so that the receiving circuit 1125 performs frequency down conversion based on the first local oscillator signal provided by the first local oscillator driving circuit 1123, to receive the part of the radio frequency signal coupled to the third antenna 1151 that belongs to the first channel. Since the coupling circuit 111 is always in the Rx state, the third port (the port marked with ③) of the coupling circuit 111 serves as an isolation port, and the output signal energy is extremely weak. Even if the third switch 1152 is connected to the third port (the port marked with ③) of the coupling circuit 111 in the third time period, it can be considered that the feedback circuit 1122 does not receive the feedback signal from the coupling circuit 111, that is, the feedback circuit 1122 cannot realize its function 1. The feedback circuit 1122 can realize its function 2, which can be referred to the introduction of the receiving circuit 1125 always in the working state in the fourth time period, and details are not described herein again.

[0188] In the fourth time period, if the receiving circuit 1125 is always in the working state, the coupling circuit 111 is always in the Rx state, and the radio frequency signal coupled to the third antenna 1151 can be transmitted to the receiving circuit 1125 through the first port (the port marked with ①) of the coupling circuit 111, so that the receiving circuit 1125 performs frequency down conversion based on the first local oscillator signal provided by the first local oscillator driving circuit 1123, to receive the part of the radio frequency signal coupled to the third antenna 1151 that belongs to the first channel. Since the third switch 1152 is connected to the fourth port (the port marked with ④) in the fourth time period, the third switch 1152 is used to transmit the extracted signal of the coupling circuit 111 to the feedback circuit 1122, so that the feedback circuit 1122 performs frequency down conversion based on the second local oscillator signal provided by the second local oscillator driving circuit 1124, to obtain the second receiving signal of the second channel from the extracted signal, that is, the feedback circuit 1122 realizes its function 2, and the first wireless device 110 can perform CAC on the second signal.

[0189] Therefore, since the receiving circuit 1125 and the feedback circuit 1122 always share the same coupling circuit, but the third switch 1152 can be connected to different ports of the coupling circuit 111 in different time periods, to select which one of the feedback signal and the extracted signal, so that the feedback circuit 1122 can be time-division multiplexed, the WLAN service reception of the first channel and the CAC of the second channel do not affect each other. That is to say, in mode 2, the first wireless device 110 can perform CAC on the second channel while ensuring normal reception of the WLAN service of the first channel.

[0190] That is, the first wireless device 110 performs CAC based on a portion of the radio frequency signal coupled by the third antenna 1151 to simplify the circuit structure and help reduce the cost of the device. Moreover, the third switch 1152 controls which of the feedback signal and the extracted signal is selected, thereby enabling time-division multiplexing of the feedback circuit 1122.

[0191] Further, in Mode 2, the first wireless device 110 further includes a fourth switch.

[0192] The fourth switch is connected with the coupler. For example, as shown in Figure 6d and Figure 6e For example, the first port of the fourth switch is connected with the fourth port (the port marked with ④ in Figure 6e ) of the coupler, the second port of the fourth switch is connected with the terminal matching circuit, and the third port of the fourth switch is connected with the C port of the third switch 1152.

[0193] The function of the fourth switch is introduced as follows:

[0194] When the third switch 1152 selects the feedback signal, the fourth switch controls the coupler 111 to be further connected with the terminal matching circuit, and the fourth switch controls the coupler 111 to be disconnected with the C port of the third switch 1152. For example, as shown in Figure 6e , the fourth switch controls the fourth port (the port marked with ④ in Figure 6e ) of the coupler 111 to be connected with the terminal matching circuit, and the fourth switch controls the fourth port (the port marked with ④ in Figure 6e ) of the coupler 111 to be disconnected with the C port of the third switch 1152. In this way, when the coupler 111 is in the Tx state, the terminal matching circuit can consume a portion of the energy to avoid the influence of the fourth port of the coupler 111 on other signals, so as to achieve good isolation.

[0195] When the third switch 1152 selects the extracted signal, the fourth switch controls the coupler 111 to be disconnected with the terminal matching circuit, and the fourth switch controls the coupler 111 to be connected with the C port of the third switch 1152. For example, as shown in Figure 1a , the fourth switch controls the fourth port (the port marked with ④ in Figure 1b ) of the coupler 111 to be disconnected with the terminal matching circuit, and the fourth switch controls the fourth port (the port marked with ④ in Figure 3 ) of the coupler 111 to be connected with the C port of the third switch 1152. In this way, when the coupler 111 is in the Rx state, the coupler 111 can feed back the extracted signal through the third switch 1152.

[0196] It should be noted that in the embodiments of the present application, only the mode 1 and mode 2 are taken as examples to introduce the acquisition process of the second received signal, of course, the second received signal can also be acquired based on other circuit structures, and the embodiments of the present application do not limit this.

[0197] The embodiments of the present application further provide a signal processing method 900. The method is applicable to the first wireless device as shown in Figure 9a 、 Figure 3 、 Figure 4a . As shown in Figure 3 , the signal processing method 900 includes the following steps:

[0198] S901, the transmitting circuit performs frequency up-conversion based on the first local oscillation signal to send the first sending signal to the coupling circuit on the first channel. Correspondingly, the coupling circuit receives the first sending signal from the transmitting circuit on the first channel.

[0199] Wherein, the first local oscillation driving circuit provides the first local oscillation signal, and the frequency of the first local oscillation signal is the frequency of the first channel. The first channel is used for transmitting WLAN service.

[0200] Wherein, the transmitting circuit, the coupling circuit and the first local oscillation driving circuit are described in the introduction of Figure 3 , which will not be repeated here.

[0201] For example, the coupling circuit is in the Tx state, and the transmitting circuit sends the first sending signal to the coupling circuit. Correspondingly, the coupling circuit receives the first sending signal from the transmitting circuit through its own first interface (such as the port marked ① in Figure 3 , and the specific implementation can be referred to the introduction of Figure 4a , which will not be repeated here.

[0202] S902, the coupling circuit extracts a part of the first sending signal to obtain the feedback signal.

[0203] For example, the coupling circuit extracts a part of the first sending signal according to a certain extraction ratio to obtain the feedback signal, and the specific implementation can be referred to the introduction of Figure 3 , which will not be repeated here.

[0204] S903, the coupling circuit sends the feedback signal to the feedback circuit. Correspondingly, the feedback circuit performs frequency down-conversion based on the first local oscillation signal to receive the feedback signal from the coupling circuit.

[0205] Wherein, the feedback circuit can be referred to the introduction of Figure 3 , which will not be repeated here.

[0206] For example, the coupling circuit is in the Tx state, and the coupling circuit receives the feedback signal from the feedback circuit through its own third interface (such as the port marked ③ in Figure 3The feedback circuit sends a feedback signal to the baseband circuit. Correspondingly, the baseband circuit receives the feedback signal from the feedback circuit. Details can be seen in the introduction of Figure 3 , which will not be repeated here.

[0207] The feedback circuit sends a feedback signal to the baseband circuit. Correspondingly, the baseband circuit receives the feedback signal from the feedback circuit. Details can be seen in the introduction of , which will not be repeated here.

[0208] The baseband circuit can be seen in the introduction of Figure 3 , which will not be repeated here.

[0209] For example, the feedback circuit sends a feedback signal to the baseband circuit at time 1. Correspondingly, the baseband circuit receives the feedback signal from the feedback circuit at time 1. Details can be seen in the introduction of Figure 3 , which will not be repeated here.

[0210] The feedback circuit performs frequency down conversion based on the second local oscillator signal to receive a second received signal of the second channel.

[0211] The second local oscillator driving circuit provides the second local oscillator signal, and the frequency of the second local oscillator signal is the frequency of the second channel, which is different from the first channel. The working frequency bands of the first local oscillator driving circuit and the second local oscillator driving circuit overlap. Details can be seen in the introduction of Figure 3 , which will not be repeated here.

[0212] For example, after the feedback circuit receives the radio frequency signal coupled to the antenna, it performs frequency down conversion processing to obtain the part belonging to the second channel from the radio frequency signal coupled to the antenna, i.e. the above-mentioned second received signal.

[0213] The feedback circuit sends a second received signal to the baseband circuit. Correspondingly, the baseband circuit receives the second received signal from the feedback circuit.

[0214] The baseband circuit can be seen in the introduction of Figure 3 , which will not be repeated here.

[0215] For example, the feedback circuit sends a second received signal to the baseband circuit at time 2. Correspondingly, the baseband circuit receives the second received signal from the feedback circuit at time 2, wherein time 1 is different from time 2, i.e. the feedback circuit does not perform S906 when it performs S904, or the feedback circuit does not perform S904 when it performs S906, and the feedback circuit is time-multiplexed. Details can be seen in the introduction of Figure 9b , which will not be repeated here.

[0216] For the feedback circuit, the feedback circuit performs S906 to enable the first wireless device to perform CAC on the second channel without affecting the normal transmission of WLAN service during the idle period of S904.

[0217] S907, the baseband circuit performs CAC on the second channel according to the second received signal.

[0218] For example, the baseband circuit includes a DFS module, and the DFS module in the baseband circuit performs CAC on the second channel according to the second received signal. For details, refer to the description of Figure 3 , which will not be repeated here.

[0219] In the signal processing method 900 of the embodiments of the present application, the feedback circuit is used to realize time-division multiplexing of the feedback signal and the second received signal. When the feedback circuit transmits the second received signal, the feedback circuit is used to perform CAC on the second channel, so that the first wireless device can complete CAC on the second channel before switching to the second channel. If the first wireless device switches from the first channel to the second channel to transmit WLAN service, the first wireless device does not need to perform CAC on the second channel again, and after switching to the second channel, the second channel is used to transmit WLAN service, thereby reducing the possibility of WLAN service interruption caused by CAC. Moreover, compared with adding a set of circuit for processing the second received signal, the above scheme can reuse the processing capability of the feedback circuit, thereby reducing the complexity of the device.

[0220] Optionally, after S904 is performed, the signal processing method 900 of the embodiments of the present application further includes:

[0221] S908, the baseband circuit performs DPD detection or channel correction according to the feedback signal.

[0222] For example, the baseband circuit further includes a DFS module, and the DFS module performs DPD detection or channel correction according to the feedback signal. For details, refer to the description of Figure 10a , which will not be repeated here.

[0223] Optionally, as shown in Figure 9a , the signal processing method 900 of the embodiments of the present application further includes:

[0224] S909, the SRC performs interface adaptation processing on the signal from the feedback circuit.

[0225] The interface adaptation processing includes at least one of sampling rate processing, bandwidth processing, and signal-to-noise ratio processing, and the baseband circuit includes an SRC. For details, refer to the description of Figure 9b , which will not be repeated here.

[0226] For example, the SRC performs interface adaptation processing on the feedback signal from the feedback circuit, and then sends the feedback signal after the interface adaptation processing to the DFS module, so that the DFS module performs DPD detection or channel correction according to the feedback signal after the interface adaptation processing. Alternatively, the SRC performs interface adaptation processing on the second received signal from the feedback circuit, and then sends the second received signal after the interface adaptation processing to the DFS module, so that the DFS module performs CAC on the second channel according to the second received signal after the interface adaptation processing.

[0227] In this way, the signal after the SRC processing is matched with the interface of the DFS module, so that the DFS module successfully receives the signal.

[0228] In the embodiment of the present application, the baseband circuit performs S909 after S906 and before S907.

[0229] In some embodiments, as shown in Figure 5a based on Figure 5a or Figure 5a , the signal processing method 900 of the embodiment of the present application further includes:

[0230] S911, the first antenna transmits the first transmitted signal after the extraction processing.

[0231] The first antenna is connected to the transmitting circuit via the coupling circuit, and details can be referred to the description of Figure 10b , which will not be repeated here.

[0232] For example, the coupling circuit extracts a part of the first transmitted signal according to a certain extraction ratio to obtain the feedback signal and the first transmitted signal after the extraction processing. Then, the coupling circuit sends the first transmitted signal after the extraction processing to the first antenna for transmission through the first antenna.

[0233] S912, the second antenna receives the second received signal.

[0234] The second antenna is connected to the feedback circuit via the first switch, and details can be referred to the description of Figure 10a , which will not be repeated here. For example, the second antenna can couple the radio frequency signal, and the radio frequency signal coupled to the second antenna can be described as the second received signal.

[0235] In the embodiment of the present application, the execution time of S911 and S912 can be the same or different, which is not limited in the embodiment of the present application.

[0236] S913, the first switch selects the feedback signal or the second received signal to transmit the selected signal to the feedback circuit. Correspondingly, the feedback circuit receives the signal selected by the first switch.

[0237] The coupling circuit is connected to the feedback circuit via a first switch. The first wireless device also includes a first antenna, a second antenna, and a first switch. For details, please refer to [link to relevant documentation]. Figure 5b The details of that will not be repeated here.

[0238] For example, when the first switch is connected to the first antenna via a coupling circuit, it indicates that the first switch has selected the feedback signal. When the first switch is connected to the second antenna, it indicates that the first switch has selected the second received signal.

[0239] In other words, the first wireless device receives the second received signal from the second channel by adding a second antenna, without affecting the signal transmission and reception processing of the first channel. Furthermore, the first switch controls which signal—the feedback signal or the second received signal—is selected, thus enabling the feedback circuit to achieve time-division multiplexing.

[0240] Furthermore, such as Figure 10c As shown, in Figure 10a Based on the method shown, the signal processing method 900 of this application embodiment further includes:

[0241] S921, the second switch selects one of at least two feedback circuits to enable the second antenna to transmit a second received signal to the selected feedback circuit.

[0242] The first wireless device also includes a second switch, at least two feedback circuits, and one second antenna. See details for further information. Figure 3 The details of the previous section will not be repeated here. The second switch can select a relatively idle feedback circuit from at least two feedback circuits and transmit a second received signal to the selected feedback circuit, thereby improving the flexibility of signal transmission.

[0243] Furthermore, such as Figure 10d As shown, in Figure 10d Based on the method shown, the signal processing method 900 of this application embodiment further includes:

[0244] S931, The receiving circuit performs down-conversion based on the first local oscillator signal to receive the portion of the radio frequency signal coupled by the first antenna that belongs to the first channel.

[0245] The radio frequency circuit also includes a receiving circuit, which can be found in [reference needed]. Figure 10d The details of that will not be repeated here.

[0246] It should be noted that, in the embodiments of this application, even if the first wireless device receives the signal of the first channel, it does not affect the reception of the second received signal and the CAC of the second channel.

[0247] For example, such as Figure 10dAs shown, between time t0 and time t1, the 5G channel of the first wireless device (such as the channel formed by the baseband circuit 113, the transmitting circuit 1121, the coupling circuit 111, and the first antenna 1141) is used for CAC, such as Figure 11a As shown, between time t0 and time t1, the 5G channel of the first wireless device (such as the channel formed by the baseband circuit 113, the transmitting circuit 1121, the coupling circuit 111, and the first antenna 1141) is used for CAC, such as Figure 9a As shown, between time t0 and time t1, the 5G channel of the first wireless device (such as the channel formed by the baseband circuit 113, the transmitting circuit 1121, the coupling circuit 111, and the first antenna 1141) is used for CAC, such as

[0248] In some embodiments, as shown in Figure 9b The 5G channel and the feedback channel share the same antenna.

[0249] In some embodiments, as shown in Figure 6a In addition to Figure 6a or Figure 6b , the signal processing method 900 of the embodiments of the present application further includes:

[0250] S941, the coupling circuit extracts a part of the radio frequency signal coupled by the third antenna to obtain an extracted signal.

[0251] The coupling circuit is further connected to the feedback circuit via a third switch, which can be referred to in Figure 6c .

[0252] For example, the coupling circuit extracts a part of the radio frequency signal coupled by the third antenna according to a certain extraction ratio to obtain an extracted signal, which can be referred to in Figure 6a .

[0253] S942, the third switch selects the feedback signal or the extracted signal to transmit the selected signal to the feedback circuit. Correspondingly, the feedback circuit receives the signal selected by the third switch.

[0254] The first wireless device further includes a third switch, which can be referred to in Figure 6a and Figure 6a , and the feedback signal can be referred to in the introduction of S902, which will not be repeated here.

[0255] Correspondingly, in the case that S941 and S942 are performed, S905 is implemented as S9051:

[0256] S9051, the feedback circuit down-converts based on the second local oscillation signal to receive the second receiving signal from the extracted signal.

[0257] Wherein, the wireless device further comprises a third antenna and a third switch, and the radio frequency circuit further comprises a receiving circuit, which can be seen from Figure 11a , and details are not described here.

[0258] For example, the third switch is connected with the fourth port (the port marked with (IV)) of the coupling circuit in some period to select the extracted signal. Correspondingly, the feedback circuit receives the extracted signal through the third switch, and then down-converts based on the second local oscillation signal to receive the second receiving signal from the extracted signal.

[0259] S943, the receiving circuit down-converts based on the first local oscillation signal to receive the part of the radio frequency signal coupled by the third antenna and belonging to the first channel.

[0260] Wherein, the first wireless device further comprises a third antenna, which can be seen from Figure 6d , and details are not described here.

[0261] For example, the third antenna couples the radio frequency signal, and sends the radio frequency signal coupled by itself to the receiving circuit through the diplexer and the coupling circuit. Correspondingly, the receiving circuit receives the radio frequency signal coupled by the third antenna through the coupling circuit and the diplexer, so that the receiving circuit obtains the receiving signal of the first channel, thereby realizing the reception of the WLAN service of the first channel. Details can be seen from Figure 6e , and details are not described here. The radio frequency signal in S943 is the radio frequency signal processed by the coupling circuit, that is, the signal processed after S941.

[0262] Further, based on the method shown in Figure 11b , the signal processing method 900 of the embodiments of the present application further comprises:

[0263] Step 1, when the third switch selects the feedback signal, the fourth switch controls the coupling circuit to be connected with the terminal matching circuit to consume part of the energy.

[0264] Wherein, the first wireless device further comprises a fourth switch, which can be seen from Figure 11b , and details are not described here.

[0265] Step 2, when the third switch selects the extracted signal, the fourth switch controls the coupling circuit to be disconnected with the terminal matching circuit and connected with the third switch.

[0266] Wherein, the fourth switch can be seen fromFigure 11b The details of that will not be repeated here.

[0267] For example, such as Figure 11b As shown, between time t0 and time t1, the 5G channel of the first wireless device (such as the channel composed of baseband circuit 113, transmitting circuit 1121, coupling circuit and third antenna 1151) is used for CAC, as... ​ In the diagram, the solid-line box between time t0 and time t1 is filled with CAC. Between time t1 and time t2, the 5G channel of the first wireless device is used to transmit service data for the WLAN service.

[0268] Between time t1 and time t2, the feedback channel (such as the channel composed of baseband circuit 113, feedback circuit 1122 and coupling circuit) first transmits the feedback signal for Tx service, then transmits the signal used for CAC to realize ZW-DFS, and then transmits the feedback signal for Tx service.

[0269] At time t2, the first wireless device detects a radar signal and needs to switch to another channel. Since the first wireless device has already performed CAC on other channels, it does not need to perform CAC again and can directly switch to the already CACed channel. ​ In the diagram, the dashed box filled with CAC is shown after time t2.

[0270] exist ​ In this system, the 5G channel and the feedback channel do not share the same antenna.

[0271] Optionally, embodiments of this application also provide a computer program product carrying computer instructions. When the computer instructions are executed on a processor, they cause the circuitry in the wireless device to perform the following steps: A transmitting circuit up-converts a first local oscillator signal to transmit a first transmit signal to a coupling circuit on a first channel, wherein a first local oscillator driving circuit provides the first local oscillator signal, and the frequency of the first local oscillator signal is the frequency of the first channel. The coupling circuit extracts a portion of the first transmit signal to obtain a feedback signal. The feedback circuit down-converts the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-converts the first local oscillator signal to receive a second receive signal on a second channel, wherein a second local oscillator driving circuit provides a second local oscillator signal, and the frequency of the second local oscillator signal is the frequency of the second channel, which is different from the first channel. The baseband circuit receives the feedback signal or the second receive signal from the feedback circuit and performs CAC on the second channel according to the second receive signal. The wireless device includes a processor, a coupling circuit, a radio frequency (RF) circuit, and a baseband circuit. The RF circuit includes a first RF driving circuit, a second RF driving circuit, a transmitting circuit, and a feedback circuit.

[0272] Optionally, the embodiment of the present application further provides a computer readable storage medium, which stores computer instructions, when the computer instructions run on a processor, to make a circuit in a wireless device execute the following steps: a transmitting circuit up-converts based on a first local oscillator signal to send a first transmitting signal to a coupling circuit on a first channel, wherein a first local oscillator driving circuit provides the first local oscillator signal, and a frequency of the first local oscillator signal is a frequency of the first channel; the coupling circuit extracts a part of the first transmitting signal to obtain a feedback signal; a feedback circuit down-converts based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-converts based on a second local oscillator signal to receive a second receiving signal of a second channel, wherein a second local oscillator driving circuit provides the second local oscillator signal, and a frequency of the second local oscillator signal is a frequency of the second channel, and the second channel is different from the first channel; and a baseband circuit receives the feedback signal or the second receiving signal from the feedback circuit, and performs CAC on the second channel according to the second receiving signal. The wireless device comprises the processor, the coupling circuit, the radio frequency circuit and the baseband circuit. The radio frequency circuit comprises the first local oscillator driving circuit, the second local oscillator driving circuit, the transmitting circuit and the feedback circuit.

[0273] Optionally, the embodiment of the present application further provides a chip, which comprises a radio frequency circuit and a baseband circuit. The radio frequency circuit comprises a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit and a feedback circuit. The first local oscillator driving circuit is configured to provide a first local oscillator signal, and a frequency of the first local oscillator signal is a frequency of a first channel. The second local oscillator driving circuit is configured to provide a second local oscillator signal, and a frequency of the second local oscillator signal is a frequency of a second channel, and the second channel is different from the first channel. The transmitting circuit is configured to up-convert based on the first local oscillator signal to send a first transmitting signal to a coupling circuit on the first channel. The feedback circuit is configured to down-convert based on the first local oscillator signal to receive a feedback signal from the coupling circuit, or down-convert based on the second local oscillator signal to receive a second receiving signal of the second channel. The baseband circuit is configured to receive the feedback signal or the second receiving signal from the feedback circuit, and perform CAC on the second channel according to the second receiving signal. The coupling circuit is configured to extract a part of the first transmitting signal to obtain the feedback signal. The wireless device comprises the chip and the coupling circuit.

[0274] Optionally, the chip is also provided in the embodiments of the present application, which comprises a coupling circuit, a radio frequency circuit and a baseband circuit. The coupling circuit is configured to extract a part of the first sending signal to obtain the feedback signal. The radio frequency circuit comprises a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit and a feedback circuit. The first local oscillator driving circuit is configured to provide a first local oscillator signal, and the frequency of the first local oscillator signal is the frequency of the first channel. The second local oscillator driving circuit is configured to provide a second local oscillator signal, and the frequency of the second local oscillator signal is the frequency of the second channel, wherein the second channel is different from the first channel. The transmitting circuit is configured to up-convert based on the first local oscillator signal to send the first sending signal to the coupling circuit on the first channel. The feedback circuit is configured to down-convert based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-convert based on the second local oscillator signal to receive a second receiving signal of the second channel. The baseband circuit is configured to receive the feedback signal or the second receiving signal from the feedback circuit, and perform CAC on the second channel according to the second receiving signal.

[0275] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented 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, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. 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 one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as digital video disc (DVD)), or semiconductor media (such as solid state drive (SSD)) and the like.

[0276] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the embodiments of the device described above are merely schematic, and the division of the circuit is merely a logical function division. For further division, for example, multiple circuits or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or modules, and can be in electrical, mechanical or other forms.

[0277] Those skilled in the art can clearly understand that the present application can be implemented by means of software and the necessary universal hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk, a hard disk or an optical disk of a computer, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0278] The above describes only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and the changes or replacements within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wireless device, comprising: The device comprises: a coupling circuit, a radio frequency circuit and a baseband circuit; wherein the coupling circuit is configured to extract a part of a first transmission signal to obtain a feedback signal; the radio frequency circuit comprises a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit and a feedback circuit; the first local oscillator driving circuit is configured to provide a first local oscillator signal, the frequency of the first local oscillator signal being the frequency of a first channel; the second local oscillator driving circuit is configured to provide a second local oscillator signal, the frequency of the second local oscillator signal being the frequency of a second channel, wherein the second channel is different from the first channel; the transmitting circuit is configured to up-convert based on the first local oscillator signal to transmit the first transmission signal to the coupling circuit on the first channel; the feedback circuit is configured to down-convert based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-convert based on the second local oscillator signal to receive a second reception signal of the second channel; the baseband circuit is configured to receive the feedback signal or the second reception signal from the feedback circuit, and perform channel availability checking on the second channel according to the second reception signal.

2. The apparatus of claim 1, wherein, The operating frequency bands of the first local oscillator driving circuit and the second local oscillator driving circuit overlap.

3. The apparatus of claim 1 or 2, wherein, The wireless device further comprises a first antenna, a second antenna and a first switch; wherein the first antenna is connected to the transmitting circuit via the coupling circuit, and is configured to transmit the first transmission signal after the extraction processing; the second antenna is connected to the feedback circuit via the first switch, and is configured to receive the second reception signal; the first switch is configured to select the feedback signal or the second reception signal to transmit the selected signal to the feedback circuit, wherein the feedback circuit is connected to the coupling circuit via the first switch.

4. The apparatus of claim 3, wherein, The number of the feedback circuits is at least two, and the number of the second antennas is one; the wireless device further comprises a second switch; the second switch is configured to select one feedback circuit from the at least two feedback circuits to make the second antenna transmit the second reception signal to the selected feedback circuit.

5. The device of claim 3, wherein the radio frequency circuit further comprises a receiving circuit; the receiving circuit is configured to down-convert based on the first local oscillator signal to receive a part of a radio frequency signal coupled by the first antenna, the part belonging to the first channel.

6. The device of claim 1 or 2, wherein the wireless device further comprises a third antenna and a third switch; the radio frequency circuit further comprises a receiving circuit; the receiving circuit is configured to down-convert based on the first local oscillator signal to receive a part of a radio frequency signal coupled by the third antenna, the part belonging to the first channel; the coupling circuit is further connected to the feedback circuit via the third switch, and the coupling circuit is further configured to extract a part of the radio frequency signal coupled by the third antenna to obtain an extraction signal; The third switch is configured to select the feedback signal or the extracted signal to transmit the selected signal to the feedback circuit; The feedback circuit is configured to down-convert based on the second local signal to receive the second receive signal from the extracted signal.

7. The apparatus of claim 6, wherein, The wireless device further includes: The fourth switch is configured to control the coupling circuit to be connected with a terminal matching circuit when the third switch selects the feedback signal, or to control the coupling circuit to be disconnected from the terminal matching circuit when the third switch selects the extracted signal.

8. The device of any of claims 1-2, 4-5, and 7, wherein: The feedback circuit is configured to down-convert based on the first local signal to receive the feedback signal from the coupling circuit without receiving the second receive signal, and to down-convert based on the second local signal to receive the second receive signal of the second channel without receiving the feedback signal.

9. The device of any of claims 1-2, 4-5, and 7, wherein: The baseband circuit is further configured to perform digital pre-distortion detection or channel correction based on the feedback signal.

10. The apparatus of any of claims 1-2, 4-5, and 7, wherein, The baseband circuit includes: The sampling rate converter is configured to perform interface adaptation processing on the signal from the feedback circuit, the interface adaptation processing including at least one of sampling rate processing, bandwidth processing, and signal-to-noise ratio processing.

11. A signal processing method, characterized by, The wireless device includes a coupling circuit, a radio frequency circuit, and a baseband circuit; the radio frequency circuit includes a first local oscillator driving circuit, a second local oscillator driving circuit, a transmitting circuit, and a feedback circuit; the method includes: The transmitting circuit up-converts based on a first local signal to transmit a first transmit signal to the coupling circuit on a first channel, wherein the first local oscillator driving circuit provides the first local signal, and a frequency of the first local signal is a frequency of the first channel; The coupling circuit extracts a portion of the first transmit signal to obtain a feedback signal; The feedback circuit down-converts based on the first local signal to receive the feedback signal from the coupling circuit, or down-converts based on a second local signal to receive a second receive signal of a second channel, wherein the second local oscillator driving circuit provides the second local signal, a frequency of the second local signal is a frequency of the second channel, and the second channel is different from the first channel; The baseband circuit receives the feedback signal or the second receive signal from the feedback circuit, and performs channel availability checking on the second channel based on the second receive signal.

12. The method of claim 11, wherein, The first local oscillator driving circuit and the second local oscillator driving circuit have overlapping frequency bands.

13. The method according to claim 11 or 12, characterized in that, The method further includes: A first antenna transmits the first transmit signal after the extraction processing, wherein the first antenna is connected with the transmitting circuit via the coupling circuit; A second antenna receives the second receive signal, wherein the second antenna is connected with the feedback circuit via a first switch; and A fourth switch is configured to control the coupling circuit to be connected with a terminal matching circuit when the third switch selects the feedback signal, or to control the coupling circuit to be disconnected from the terminal matching circuit when the third switch selects the extracted signal. The first switch selects the feedback signal or the second received signal to transmit the selected signal to the feedback circuit, wherein the coupling circuit is connected to the feedback circuit via the first switch; The wireless device further comprises the first antenna, the second antenna and the first switch.

14. The method of claim 13, wherein, The number of the feedback circuits is at least two, and the number of the second antennas is one; The method further comprises: A second switch selects one feedback circuit from the at least two feedback circuits to make the second antenna transmit the second received signal to the selected feedback circuit, wherein the wireless device further comprises the second switch.

15. The method of claim 13, wherein, The method further comprises: A receiving circuit down-converts based on the first local oscillator signal to receive a part of a radio frequency signal coupled by the first antenna belonging to the first channel; wherein the radio frequency circuit further comprises the receiving circuit.

16. The method of claim 11 or 12, wherein, The method further comprises: A receiving circuit down-converts based on the first local oscillator signal to receive a part of a radio frequency signal coupled by the third antenna belonging to the first channel; The coupling circuit extracts a part of the radio frequency signal coupled by the third antenna to obtain an extracted signal, wherein the coupling circuit is further connected to the feedback circuit via a third switch; The third switch selects the feedback signal or the extracted signal to transmit the selected signal to the feedback circuit; The feedback circuit down-converts based on the second local oscillator signal to receive the second received signal from the extracted signal; The wireless device further comprises the third antenna and the third switch; and the radio frequency circuit further comprises a receiving circuit.

17. The method of claim 16, wherein, The method further comprises: When the third switch selects the feedback signal, a fourth switch controls the coupling circuit to be connected to a terminal matching circuit; or When the third switch selects the extracted signal, the fourth switch controls the coupling circuit to be disconnected from the terminal matching circuit; The wireless device further comprises the fourth switch.

18. The method of any one of claims 11-12, 14-15, and 17, wherein, The method further comprises: When the feedback circuit down-converts based on the first local oscillator signal to receive the feedback signal from the coupling circuit, the feedback circuit does not receive the second received signal; or When the feedback circuit down-converts based on the second local oscillator signal to receive a second received signal of the second channel, the feedback circuit does not receive the feedback signal.

19. The method of any one of claims 11-12, 14-15, and 17, wherein, The method further comprises: The baseband circuit performs digital pre-distortion detection or channel correction according to the feedback signal.

20. The method of any one of claims 11-12, 14-15, and 17, wherein, The method further comprises: A sample rate converter (SRC) interfaces the signal from the feedback circuit, wherein the interface processing comprises at least one of the following: sample rate processing, bandwidth processing, signal-to-noise ratio processing; and the baseband circuit comprises the SRC.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a program, which is invoked by a processor to make the circuit in the wireless device perform the following steps: The transmitting circuit up-converts based on a first local oscillator signal to transmit a first transmit signal to the coupling circuit on a first channel, wherein the first local oscillator driving circuit provides the first local oscillator signal, and a frequency of the first local oscillator signal is a frequency of the first channel; The coupling circuit extracts a portion of the first transmit signal to obtain a feedback signal; The feedback circuit down-converts based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-converts based on a second local oscillator signal to receive a second receive signal of a second channel, wherein the second local oscillator driving circuit provides the second local oscillator signal, and a frequency of the second local oscillator signal is a frequency of the second channel, the second channel being different from the first channel; The baseband circuit receives the feedback signal or the second receive signal from the feedback circuit, and performs a channel availability check on the second channel according to the second receive signal; The wireless device includes the processor, the coupling circuit, a radio frequency circuit, and the baseband circuit; the radio frequency circuit includes the first local oscillator driving circuit, the second local oscillator driving circuit, the transmitting circuit, and the feedback circuit.

22. A computer program product comprising instructions, wherein: When the computer program product is invoked by the processor, the circuit in the wireless device performs the following steps: The transmitting circuit up-converts based on a first local oscillator signal to transmit a first transmit signal to the coupling circuit on a first channel, wherein the first local oscillator driving circuit provides the first local oscillator signal, and a frequency of the first local oscillator signal is a frequency of the first channel; The coupling circuit extracts a portion of the first transmit signal to obtain a feedback signal; The feedback circuit down-converts based on the first local oscillator signal to receive the feedback signal from the coupling circuit, or down-converts based on a second local oscillator signal to receive a second receive signal of a second channel, wherein the second local oscillator driving circuit provides the second local oscillator signal, and a frequency of the second local oscillator signal is a frequency of the second channel, the second channel being different from the first channel; The baseband circuit receives the feedback signal or the second receive signal from the feedback circuit, and performs a channel availability check on the second channel according to the second receive signal; The wireless device includes the processor, the coupling circuit, a radio frequency circuit, and the baseband circuit; the radio frequency circuit includes the first local oscillator driving circuit, the second local oscillator driving circuit, the transmitting circuit, and the feedback circuit.

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