Wireless device, signal processing method and chip

Abstract

The invention discloses wireless equipment, a signal processing method and a chip, and belongs to the technical field of communication. In the invention, when a radio frequency receiving channel in a signal receiving and transmitting unit receives a signal through an antenna, a radio frequency transmitting channel in the signal receiving and transmitting unit outputs a cancellation signal corresponding to an interference signal, and a signal coupling module is newly added in the signal receiving and transmitting unit of the wireless equipment; and the signal coupling module is used for coupling the cancellation signal output by the radio frequency transmitting channel with the signal received by the antenna so as to eliminate the interference signal in the signal received by the antenna, namely, the self-interference elimination is realized. Therefore, the wireless equipment provided by the invention utilizes the idle radio frequency transmitting channel in the signal receiving and transmitting unit to output the cancellation signal of the interference signal, and compared with the mode that a hardware circuit is newly added to output the cancellation signal, the wireless equipment provided by the invention is relatively low in hardware cost.

Description

Wireless devices, signal processing methods and chips Technical Field

[0001] This application relates to the field of communication technology, and in particular to a wireless device, a signal processing method, and a chip. Background Technology

[0002] Wireless local area networks (WLANs) are wireless communication networks built based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series of standards. A WLAN typically includes access points (APs) and stations (STAs). APs provide wireless access services to STAs and can exchange messages with them; APs can also exchange messages with each other.

[0003] However, signals transmitted between wireless devices (e.g., AP, STA, etc.) may be intercepted by third parties, resulting in low security and reliability of signal transmission. Summary of the Invention

[0004] This application provides a wireless device, a signal processing method, and a chip, which can reduce the hardware cost of the wireless device while implementing self-interference cancellation technology. The technical solution is as follows:

[0005] In a first aspect, a wireless device is provided, which includes a signal transceiver unit and an interference signal generating unit. The signal transceiver unit includes a first radio frequency transmitting channel, a first radio frequency receiving channel, a first radio frequency front-end module (FEM), a first antenna, and a signal coupling module. The interference signal generating unit includes an interference signal output module and a second antenna.

[0006] The first radio frequency transmitting channel and the first radio frequency receiving channel are respectively connected to the first FEM, the first FEM is also connected to the first antenna, the signal coupling module is respectively connected to the first radio frequency transmitting channel and the target position, the target position is located between the first radio frequency receiving channel and the first antenna, and the interference signal output module is connected to the second antenna.

[0007] The interference signal output module is used to output an interference signal to the second antenna when the first antenna receives a signal; the first radio frequency transmission channel is used to output a cancellation signal corresponding to the interference signal when the first antenna receives a signal; the signal coupling module is used to couple the cancellation signal and the first signal at the target location, the first signal being the signal received by the first antenna; the first radio frequency receiving channel is used to receive a second signal, the second signal being the signal after coupling the first signal and the cancellation signal.

[0008] In this embodiment, considering the half-duplex operation of the signal transceiver unit in the wireless device—that is, when the RF receiving channel in the signal transceiver unit receives a signal through the antenna, the RF transmitting channel in the signal transceiver unit is idle—the RF receiving channel outputs a cancellation signal corresponding to the interference signal when it receives a signal through the antenna. A signal coupling module is added to the signal transceiver unit of the wireless device to couple the cancellation signal output by the RF transmitting channel with the signal received by the antenna, thereby eliminating the interference signal in the received signal, i.e., achieving self-interference cancellation. Therefore, the wireless device provided in this embodiment utilizes the idle RF transmitting channel in the signal transceiver unit to output a cancellation signal for the interference signal. Compared to adding a new hardware circuit to output the cancellation signal, the hardware cost of the wireless device provided in this embodiment is lower.

[0009] Furthermore, in scenarios where multiple signal transceiver units in a wireless device simultaneously receive signals, since the radio frequency transmission channels in each signal transceiver unit are in an idle state, each signal transceiver unit can achieve interference self-cancellation through its own idle radio frequency transmission channels, further reducing the hardware cost of the wireless device.

[0010] Furthermore, in this embodiment, the wireless device outputs the cancellation signal through the first radio frequency (RF) transmission channel in the signal transceiver unit. This first RF transmission channel converts the digital domain signal into an RF domain signal. Therefore, in this embodiment, the RF domain cancellation signal and the first RF domain signal are coupled together. Compared to eliminating interference signals in the first signal in the digital domain using algorithms, the interference self-cancellation scheme of the wireless device in this embodiment is more effective.

[0011] Based on the wireless device provided in the first aspect, in one possible implementation, the target location is located between the first FEM and the first antenna.

[0012] In this scenario, interference signals in the first signal received by the first antenna are eliminated by a cancellation signal before entering the first FEM. This prevents the energy of the signal entering the first FEM from being too high, thereby avoiding oversaturation of the first FEM due to excessive energy.

[0013] Based on the wireless device provided in the first aspect, in one possible implementation, the signal coupling module includes a first switch and a coupler; a first end of the first switch is connected to the output end of a first radio frequency transmission channel, a second end of the first switch is connected to the input end of a first FEM, a third end of the first switch is connected to the first end of the coupler, a second end of the coupler is connected to the signal transceiver end of the first FEM, and a third end of the coupler is connected to a first antenna.

[0014] In this embodiment, the signal coupling module can be implemented with a switch and a coupler, further reducing the hardware cost of the wireless device.

[0015] In this scenario, when the first antenna transmits a signal, the first terminal of the first switch is closed to the second terminal of the first switch; when the first antenna receives a signal, the first terminal of the first switch is closed to the third terminal of the first switch.

[0016] By controlling the on / off state of the first switch, the following can be achieved: when the first antenna transmits a signal, the first radio frequency transmission channel, the first FEM, and the signal transmission link formed by the first antenna work normally to send signals to other wireless devices; when the first antenna receives signals from other wireless devices, the first radio frequency reception channel, the first FEM, and the signal reception link formed by the first antenna work normally to receive signals from other wireless devices, and the originally idle first radio frequency transmission channel is used to output a cancellation signal, and the cancellation signal is transmitted to the target location through the first switch and coupler, so that the cancellation signal and the first signal are coupled at the target location, thereby achieving self-interference cancellation.

[0017] Based on the wireless device provided in the first aspect, in one possible implementation, the signal coupling module further includes a power amplifier PA; the input of PA is connected to the third terminal of the first switch, and the output of PA is connected to the first terminal of the coupler.

[0018] PA corresponds to a gain. PA increases the amplitude of the received cancellation signal according to this gain, thereby increasing the energy of the cancellation signal.

[0019] Based on the wireless device provided in the first aspect, in one possible implementation, the signal coupling module further includes a second switch; the first end of the second switch is connected to the first end of the coupler, the second end of the second switch is used for grounding, and the third end of the second switch is connected to the third end of the first switch.

[0020] In this scenario, when the first antenna transmits a signal, the first terminal of the second switch is closed to the second terminal of the second switch; when the first antenna receives a signal, the first terminal of the second switch is closed to the third terminal of the second switch.

[0021] When the first antenna transmits a signal, considering that a small amount of signal from the first FEM output signal may enter the first end of the coupler, the first end of the coupler is grounded by the second switch when the first antenna transmits a signal, so as to avoid this small amount of signal being transmitted in the signal coupling module, thereby causing power consumption waste of other devices in the signal coupling module.

[0022] Based on the wireless device provided in the first aspect, in one possible implementation, the signal coupling module further includes a resistor; the second terminal of the second switch is connected to the first terminal of the resistor, and the second terminal of the resistor is used for grounding.

[0023] A resistor can be used to prevent excessive voltage at the first end of the coupler when the first antenna transmits a signal.

[0024] Based on the wireless device provided in the first aspect, in one possible implementation, the signal transceiver unit further includes a first digital front-end (DFE) transmitting module, a first DFE receiving module, and a cancellation coefficient training module. The first DFE transmitting module is connected to a first radio frequency (RF) transmitting channel, and the first DFE receiving module is connected to the first RF receiving channel. The cancellation coefficient training module is connected to the interference signal output module, the first DFE receiving module, and the first DFE transmitting module, respectively. The first DFE transmitting module is also connected to the interference signal output module. The cancellation coefficient training module is used to train cancellation coefficients based on the interference signal received by the first DFE receiving module and the interference signal output by the interference signal output module when the first antenna is not transmitting or receiving service signals. The first DFE transmitting module is used to generate a cancellation signal based on the cancellation coefficients and the interference signal output by the interference signal output module when the first antenna receives signals.

[0025] For example, during the system initialization of the wireless device provided in this application embodiment, the wireless device has not yet communicated with other wireless devices. At this time, the second antenna in the interference signal generation unit can be controlled to transmit interference signals, and the interference signals can be received through the first DFE receiving module, the first radio frequency receiving channel, the first FEM, and the first antenna in the signal transceiver unit. When the first DEF receiving module receives the interference signal, it sends the interference signal to the cancellation coefficient training module. At the same time, when the interference signal output module outputs the interference signal to the second antenna, it also sends the output interference signal to the cancellation coefficient training module, so that the cancellation coefficient training module can train and obtain cancellation coefficients based on the interference signal sent by the first DFE receiving module and the interference signal sent by the interference signal output module. After obtaining the cancellation coefficients, the cancellation coefficient training module sends the cancellation coefficients to the first DEF transmitting module, and the first DEF transmitting module buffers the cancellation coefficients. Subsequently, when the first antenna receives signals from other wireless devices, the first DEF transmitting module can output the corresponding cancellation signal based on the cancellation coefficients and the interference signal output by the current time interference signal output module 21.

[0026] Based on the wireless device provided in the first aspect, in one possible implementation, the bandwidth of the interfering signal is less than the bandwidth of the service signal received by the first antenna. This eliminates the need to interfere with the entire frequency band of the service signal; interference is only required on a portion of the frequency band, thereby reducing the difficulty for the wireless device to achieve self-cancellation of interference.

[0027] Based on the wireless device provided in the first aspect, in one possible implementation, the frequency distribution of the interference signal includes multiple discontinuous frequency intervals, the sum of the interval sizes of the multiple frequency intervals being less than the bandwidth of the service signal.

[0028] In this embodiment, the frequency distribution of the interference signal can be a continuous frequency range. Optionally, the frequency distribution of the interference signal can also include multiple discontinuous frequency ranges, where the sum of the sizes of the multiple frequency ranges is less than the bandwidth of the service signal received by the first antenna. This allows for flexible interference of the service signal received by the first antenna in different frequency ranges, improving the flexibility of the interference signal.

[0029] Based on the wireless device provided in the first aspect, in one possible implementation, the duration of the interfering signal is shorter than the duration of the service signal received by the first antenna. This eliminates the need to interfere with all information of the service signal; interference with only a portion of the service signal is sufficient, thereby reducing the difficulty for the wireless device to achieve self-cancellation of interference.

[0030] Based on the wireless device provided in the first aspect, in one possible implementation, the interference signal includes a plurality of interference sub-signals transmitted sequentially; the sum of the durations of the plurality of interference sub-signals is less than the duration of the service signal.

[0031] In the embodiments of this application, the service signal can be flexibly interfered with at multiple different time periods, thereby improving the flexibility of the interference signal.

[0032] Based on the wireless device provided in the first aspect, in one possible implementation, the wireless device is an access point (AP), and the first signal includes an uplink signal from a station (STA). Thus, the solution provided by the embodiments of this application can reduce the hardware cost of the AP while simultaneously canceling self-interference in the uplink signal.

[0033] Secondly, a signal processing method for a wireless device is provided. The wireless device includes a signal transceiver unit and an interference signal generation unit. The signal transceiver unit includes a first radio frequency transmitting channel, a first radio frequency receiving channel, a first radio frequency front-end module (FEM), a first antenna, and a signal coupling module. The interference signal generation unit includes an interference signal output module and a second antenna.

[0034] In this method, when the first antenna receives a signal, the interference signal output module outputs an interference signal to the second antenna, and the first radio frequency transmission channel outputs a cancellation signal corresponding to the interference signal. The signal coupling module couples the cancellation signal with the first signal at the target location. The first signal is the signal received by the first antenna, and the target location is located between the first radio frequency receiving channel and the first antenna.

[0035] Based on the method provided in the second aspect, in one possible implementation, the signal coupling module includes a first switch and a coupler. A first end of the first switch is connected to the output of a first radio frequency transmission channel, a second end of the first switch is connected to the input of a first FEM, a third end of the first switch is connected to the first end of the coupler, a second end of the coupler is connected to the signal transceiver of the first FEM, and a third end of the coupler is connected to a first antenna.

[0036] In this scenario, when the first antenna transmits a service signal, the first terminal of the first switch is closed to the second terminal of the first switch; when the first antenna receives a service signal, the first terminal of the first switch is closed to the third terminal of the first switch.

[0037] Based on the method provided in the second aspect, in one possible implementation, the signal coupling module further includes a second switch, the first end of which is connected to the first end of the coupler, the second end of which is used for grounding, and the third end of which is connected to the third end of the first switch.

[0038] In this scenario, when the first antenna transmits a service signal, the first terminal of the second switch is closed to the second terminal of the second switch; when the first antenna receives a service signal, the first terminal of the second switch is closed to the third terminal of the second switch.

[0039] Thirdly, a chip is provided for use in a wireless device, the chip including a first radio frequency transmission channel, a first radio frequency reception channel and a signal coupling module.

[0040] The first radio frequency transmitting channel and the first radio frequency receiving channel are respectively used to connect to the first FEM, the first FEM is used to connect to the first antenna, the signal coupling module is respectively connected to the first radio frequency transmitting channel and the target position, and the target position is located between the first radio frequency receiving channel and the first antenna.

[0041] The first radio frequency transmitting channel is used to output a cancellation signal corresponding to the interference signal when the first antenna receives the signal. The interference signal is transmitted by the second antenna in the interference signal generation unit in the wireless device. The signal coupling module is used to couple the cancellation signal and the first signal at the target location. The first signal is the signal received by the first antenna. The first radio frequency receiving channel is used to receive the second signal. The second signal is the signal after coupling the first signal and the cancellation signal.

[0042] Based on the chip provided by the third party, in one possible implementation, the chip also includes a first FEM.

[0043] The technical means corresponding to the second and third aspects mentioned above are similar to the technical effects achieved by the wireless device provided in the first aspect, and will not be described in detail here. Attached Figure Description

[0044] Figure 1 is a schematic diagram of an uplink self-interference cancellation technology scenario;

[0045] Figure 2 is a schematic diagram of a board-level cancellation circuit;

[0046] Figure 3 is a schematic diagram of an RFIC-level cancellation circuit;

[0047] Figure 4 is a schematic diagram of the structure of a wireless device provided in an embodiment of this application;

[0048] Figure 5 is a schematic diagram of the structure of a first FEM provided in an embodiment of this application;

[0049] Figure 6 is a schematic diagram of signal flow provided in an embodiment of this application;

[0050] Figure 7 is a schematic diagram of a target location provided in an embodiment of this application;

[0051] Figure 8 is a schematic diagram of a signal coupling module provided in an embodiment of this application;

[0052] Figure 9 is a schematic diagram of another signal coupling module provided in an embodiment of this application;

[0053] Figure 10 is a schematic diagram of another signal coupling module provided in an embodiment of this application;

[0054] Figure 11 is a schematic diagram of another signal coupling module provided in an embodiment of this application;

[0055] Figure 12 is a schematic diagram of another signal coupling module provided in an embodiment of this application;

[0056] Figure 13 is a schematic diagram of another signal coupling module provided in an embodiment of this application;

[0057] Figure 14 is a schematic diagram of another wireless device provided in an embodiment of this application;

[0058] Figure 15 is a schematic diagram of another wireless device provided in an embodiment of this application;

[0059] Figure 16 is a schematic diagram of the structure of an interference signal generation unit provided in an embodiment of this application;

[0060] Figure 17 is a schematic diagram of another wireless device provided in an embodiment of this application;

[0061] Figure 18 is a schematic diagram of the chip layout of a wireless device in scenario 1 provided by an embodiment of this application;

[0062] Figure 19 is a schematic diagram of the chip layout of a wireless device in scenario 2 provided in an embodiment of this application;

[0063] Figure 20 is a schematic diagram of another wireless device provided in an embodiment of this application;

[0064] Figure 21 is a schematic diagram of the bandwidth of an interference signal provided in an embodiment of this application;

[0065] Figure 22 is a bandwidth diagram of another interference signal provided in an embodiment of this application;

[0066] Figure 23 is a schematic diagram of the bandwidth of another interference signal provided in an embodiment of this application;

[0067] Figure 24 is a schematic diagram of the duration of an interference signal provided in an embodiment of this application;

[0068] Figure 25 is a schematic diagram of the duration of another interference signal provided in an embodiment of this application;

[0069] Figure 26 is a schematic diagram of the duration of another interference signal provided in an embodiment of this application;

[0070] Figure 27 is a flowchart of a signal processing method for a wireless device provided in an embodiment of this application;

[0071] Figure 28 is a schematic diagram of the structure of a chip provided in an embodiment of this application;

[0072] Figure 29 is a schematic diagram of another chip structure provided in an embodiment of this application. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0074] Before explaining the embodiments of this application, we will first illustrate the application scenarios of the embodiments of this application.

[0075] Currently, industries with high security requirements have not widely deployed WLAN due to security considerations. However, the lack of WLAN support has impacted the work efficiency of these industries. Therefore, WLAN has become a network development trend for industries with high security needs. However, the over-the-air transmission characteristics of wireless signals in WLAN raise serious questions about its security.

[0076] In some scenarios, WLAN data security primarily relies on cryptographic encryption schemes, such as the Advanced Encryption Standard (AES) algorithm in protocols like Wi-Fi Protected Access 2 (WPA2) and Wi-Fi Protected Access 3 (WPA3). These schemes protect the security of information transmission in WLAN by encrypting data; however, ciphertext transmitted over the air can still be intercepted, tampered with, and forwarded by attackers. Furthermore, in the era of big data, major manufacturers are constantly pursuing improvements in computing power, resulting in increasingly superior computer performance. Therefore, there is a consensus in the industry that future computer development will render traditional symmetric / asymmetric cryptographic systems ineffective. For these two reasons, some industries that prioritize data security still have certain concerns about WLAN security, thus affecting the development of WLAN in these industries.

[0077] Therefore, ensuring data security has become the biggest challenge for the widespread application of WLAN. Currently, technologies such as frequency hopping and directional antennas can effectively reduce the probability of data eavesdropping, but these technologies require customized terminals. Therefore, there is an urgent need for a technology that can ensure data security without modifying the terminal.

[0078] In some scenarios, a technique that ensures data security without modifying the terminal is uplink self-interference cancellation technology. Figure 1 is a schematic diagram of an uplink self-interference cancellation technology scenario. As shown in Figure 1, for the uplink signal sent by the STA to the AP in a WLAN, the AP actively transmits interference signals while receiving the uplink signal. Thus, when an attacker eavesdrops on the uplink signal, it is difficult to successfully obtain the information in the uplink signal due to the influence of the interference signal. At the same time, the AP is also configured with a cancellation scheme, which includes: generating a cancellation signal, which eliminates the interference signal in the received signal, thereby obtaining the uplink signal sent by the STA.

[0079] The cancellation schemes configured within the AP include the following two examples.

[0080] Alternative Solution 1: Add a board-level cancellation circuit to the AP.

[0081] Figure 2 is a schematic diagram of a board-level cancellation circuit. As shown in Figure 2, the AP includes a system-on-chip (SOC), a radio frequency integrated circuit (RFIC), two front-end modules (FEMs), and two antennas. In Figure 2, the two FEMs are labeled FEM1 and FEM2, and the two antennas are labeled Antenna 1 and Antenna 2. The SOC includes digital processing module 1 corresponding to FEM1 and digital processing module 2 corresponding to FEM2. The RFIC includes radio frequency channel 1 corresponding to FEM1 and radio frequency channel 2 corresponding to FEM2.

[0082] Referring again to Figure 2, digital processing module 1, RF channel 1, FEM1, and antenna 1 form a self-generated interference signal link, which is used to transmit interference signals when antenna 2 receives uplink signals. Digital processing module 2, RF channel 2, FEM2, and antenna 2 form an uplink signal receiving link, which is used to receive uplink signals from STA.

[0083] Referring again to Figure 2, the input of the board-level cancellation circuit is connected between antenna 1 and FEM1, and the output is connected between antenna 2 and FEM2. The board-level cancellation circuit is used to: receive the interference signal output from FEM1, then convert this interference signal in the radio frequency domain to obtain a cancellation signal for eliminating the interference signal, and transmit the cancellation signal to the location between antenna 2 and FEM2, so that the cancellation signal and the signal received by antenna 2 are coupled at that location, thereby eliminating the interference signal in the signal received by antenna 2. The conversion of the interference signal in the radio frequency domain can be understood as: converting the analog form of the interference signal to obtain the analog form of the cancellation signal.

[0084] However, the board-level cancellation circuit shown in Figure 2 includes a large number of components, resulting in high hardware costs for the AP. Furthermore, if multiple uplink signal receiving links exist simultaneously in the AP, the energy of the interference signals received by different uplink signal receiving links varies, and consequently, the energy of the cancellation signals required for each uplink signal receiving link also differs. Therefore, a board-level cancellation circuit needs to be configured for each uplink signal receiving link in the AP, further increasing the hardware cost of the AP.

[0085] Alternative solution 2: Add an RFIC-level cancellation circuit to the AP.

[0086] Figure 3 is a schematic diagram of an RFIC-level cancellation circuit. As shown in Figure 3, the AP includes a SOC, an RFIC, two FEMs, and two antennas. In Figure 3, the two FEMs are labeled FEM1 and FEM2, and the two antennas are labeled Antenna 1 and Antenna 2. The SOC includes a digital processing module 1 corresponding to FEM1 and a digital processing module 2 corresponding to FEM2. The RFIC includes an RF channel 1 corresponding to FEM1 and an RF channel 2 corresponding to FEM2.

[0087] Referring again to Figure 3, digital processing module 1, RF channel 1, FEM1, and antenna 1 form a self-generated interference signal link, which is used to transmit interference signals when antenna 2 receives uplink signals. Digital processing module 2, RF channel 2, FEM2, and antenna 2 form an uplink signal receiving link, which is used to receive uplink signals from STA.

[0088] Referring again to Figure 3, the RFIC-level cancellation circuit is integrated inside the RFIC, with its input connected to RF channel 1 and its output connected to RF channel 2. The RFIC-level cancellation circuit is used to: receive interference signals from RF channel 1, convert these interference signals in the RF domain to obtain a cancellation signal for eliminating the interference, and transmit the cancellation signal to RF channel 2. This allows the cancellation signal and the signal received by antenna 2 to couple within RF channel 2, thereby eliminating interference signals in the signal received by antenna 2.

[0089] However, the RFIC-level cancellation circuit shown in Figure 3 also includes a large number of components, resulting in high hardware costs for the RFIC and consequently, high hardware costs for the AP. Furthermore, if multiple uplink signal receiving links exist in the AP, an RFIC-level cancellation circuit must be configured within the RFIC for each uplink signal receiving link, further increasing the AP's hardware costs.

[0090] Based on this, embodiments of this application provide a wireless device, which includes a signal transceiver unit and an interference signal generating unit. The interference signal generating unit generates an interference signal when the signal transceiver unit receives a signal, thereby preventing attackers from eavesdropping on the signals received by the wireless device.

[0091] In this embodiment, considering that the signal transceiver unit in the wireless device has a half-duplex operation characteristic, that is, when the radio frequency receiving channel in the signal transceiver unit receives a signal through the antenna, the radio frequency transmitting channel in the signal transceiver unit is in an idle state, when the radio frequency receiving channel in the signal transceiver unit receives a signal through the antenna, the radio frequency transmitting channel in the signal transceiver unit outputs a cancellation signal corresponding to the interference signal, and a signal coupling module is added to the signal transceiver unit of the wireless device. The cancellation signal output by the radio frequency transmitting channel is coupled with the signal received by the antenna using the signal coupling module to eliminate the interference signal in the signal received by the antenna, that is, to achieve self-interference cancellation.

[0092] Therefore, the wireless device provided in this application embodiment utilizes the idle radio frequency transmission channel in the signal transceiver unit to output a cancellation signal for the interference signal. Compared with the addition of a cancellation circuit to generate the cancellation signal in Figures 2 and 3, the hardware cost of the wireless device provided in this application embodiment is lower.

[0093] Furthermore, in scenarios where multiple signal transceiver units in a wireless device simultaneously receive signals, since the radio frequency transmission channels in each signal transceiver unit are in an idle state, each signal transceiver unit can achieve interference self-cancellation through its own idle radio frequency transmission channels, further reducing the hardware cost of the wireless device.

[0094] In this application embodiment, the wireless device can be an access point (AP), and the antenna in the signal transceiver unit receives uplink signals from a STA or other APs. Thus, the solution provided by this application embodiment can reduce the hardware cost of the AP while simultaneously canceling self-interference in the uplink signal.

[0095] Optionally, the wireless device provided in this application embodiment can also be other types of wireless devices in a WLAN, such as a STA. Optionally, the wireless device provided in this application embodiment can also be a medical device for health data detection. For example, after transmitting a signal, the medical device detects the user's health data by receiving the reflected signal. In this scenario, the medical device can also actively transmit interference signals when receiving the reflected signal, and achieve self-cancellation of interference through the solution provided in this application embodiment.

[0096] It should be noted that the above-described application scenarios of the wireless device provided in the embodiments of this application are for illustrative purposes only and do not constitute a limitation on the application scenarios of the wireless device provided in the embodiments of this application. Other application scenarios of the wireless device provided in the embodiments of this application will not be illustrated here.

[0097] The structure of the wireless device provided in the embodiments of this application will be described below.

[0098] Figure 4 is a schematic diagram of the structure of a wireless device provided in an embodiment of this application. As shown in Figure 4, the wireless device includes a signal transceiver unit 1 and an interference signal generation unit 2. The signal transceiver unit 1 includes a first radio frequency transmitting channel 11, a first radio frequency receiving channel 12, a first FEM 13, a first antenna 14, and a signal coupling module 15. The interference signal generation unit 2 includes an interference signal output module 21 and a second antenna 22.

[0099] Referring again to Figure 4, the first RF transmitting channel 11 and the first RF receiving channel 12 are respectively connected to the first FEM 13, which is also connected to the first antenna 14. The signal coupling module 15 is connected to the first RF transmitting channel 11 and the target location, which is located between the first RF receiving channel 12 and the first antenna 14. Figure 4 shows an example where the target location is between the first FEM 13 and the first antenna 14. The interference signal output module 21 is connected to the second antenna 22.

[0100] For example, the output of the first radio frequency transmitting channel 11 is connected to the input of the first FEM 13, the input of the first radio frequency receiving channel 12 is connected to the output of the first FEM 13, and the signal transceiver of the first FEM 13 is connected to the first antenna 14. The input of the signal coupling module 15 is connected to the output of the first radio frequency transmitting channel 11, and the output of the signal coupling module 15 is connected to the target location.

[0101] The interference signal output module 21 is used to output an interference signal to the second antenna 22 when the first antenna 14 receives a signal. The first radio frequency transmission channel 11 is used to output a cancellation signal corresponding to the interference signal when the first antenna 14 receives a signal. The signal coupling module 15 is used to couple the cancellation signal and the first signal at the target location, where the first signal is the signal received by the first antenna 14. The first radio frequency receiving channel 12 is used to receive a second signal, where the second signal is the signal after coupling the first signal and the cancellation signal.

[0102] The first antenna receiving signals can be understood as the first antenna receiving signals from other wireless devices. For example, in a scenario where the wireless device is an access point (AP), the first antenna receiving signals typically includes receiving uplink signals from a STA (Station) or signals transmitted from other APs. Signals from other wireless devices or signals transmitted to other wireless devices can be collectively referred to as service signals.

[0103] To facilitate subsequent understanding, we will first provide an example to illustrate the working principle of each component shown in Figure 4.

[0104] The first radio frequency (RF) transmission channel 11 is used to convert digital signals into analog signals. Therefore, the output cancellation signal of the first RF transmission channel 11 can be understood as: the first RF channel 11 converts the digital cancellation signal into an analog cancellation signal and outputs the analog cancellation signal. The digital cancellation signal can also be called a cancellation signal in the digital domain, and the analog cancellation signal can also be called a cancellation signal in the radio frequency (RF) domain.

[0105] The signal coupling module 15 is used to transmit the cancellation signal output by the first radio frequency transmission channel 11 to the target location, so as to realize the coupling between the first signal and the cancellation signal at the target location.

[0106] The first radio frequency receiving channel 12 is used to convert analog signals into digital signals. Therefore, after receiving the second signal, the first radio frequency receiving channel 12 will also convert the analog second signal into the digital second signal, that is, convert the radio frequency domain second signal into the digital domain second signal.

[0107] The first FEM 13 is used to amplify and process the signals transmitted and received by the first antenna 14. Figure 5 is a schematic diagram of the structure of a first FEM 13 provided in an embodiment of this application. As shown in Figure 5, the first FEM 13 includes a switch K, a power amplifier (PA), a low noise amplifier (LNA), and other devices. It should be noted that Figure 5 is used to illustrate the internal structure of the first FEM 13, and the internal structure of the first FEM is not limited in this embodiment of the application.

[0108] Referring again to Figure 5, when the first antenna 14 receives a signal, the switch K in the first FEM 13 is turned on with the LNA, thus transmitting the signal received by the first antenna 14 to the first RF receiving channel 12 via the LNA through the first FEM 13. Correspondingly, when the first antenna 14 transmits a signal, the switch K in the first FEM 13 is turned on with the PA, thus transmitting the signal output from the first RF transmitting channel 11 to the first antenna 14 via the PA through the first FEM 13.

[0109] Figure 6 is a schematic diagram of a signal flow provided in an embodiment of this application. As shown in Figure 6, when the first antenna 14 receives service signals from other wireless devices, the interference signal output module 21 transmits an interference signal through the second antenna 22. The first antenna 14 receives a first signal including the interference signal and the service signal. The first FEM 13 transmits the relevant signal (e.g., the first signal or a second signal obtained by coupling the first signal with a cancellation signal) to the first radio frequency receiving channel 12. The first radio frequency transmitting channel 11 outputs a cancellation signal and outputs the cancellation signal to the target location through the signal coupling module 15, so as to eliminate the interference signal in the first signal through the cancellation signal.

[0110] Based on the wireless device shown in Figure 4, during the process of the first radio frequency receiving channel 12 in the signal transceiver unit 1 receiving signals from other wireless devices through the first FEM 13 and the first antenna 14, the interference signal output module 21 in the interference signal generation unit 2 transmits interference signals through the second antenna 22. Thus, if an attacker is eavesdropping on the signals transmitted by other wireless devices, the attacker will simultaneously receive the interference signal transmitted by that wireless device, preventing the attacker from successfully deciphering the signals transmitted by other wireless devices.

[0111] Furthermore, during the process of the first radio frequency receiving channel 12 in the signal transceiver unit receiving signals from other wireless devices through the first FEM 13 and the first antenna 14, the first radio frequency transmitting channel 13 in the signal transceiver unit outputs a self-cancelling signal corresponding to the interference signal, and couples the cancellation signal and the first signal received by the first antenna 14 at the target location through the signal coupling module, so as to eliminate the interference signal in the first signal through the cancellation signal. In other words, the wireless device provided in this application embodiment can achieve interference self-cancellation.

[0112] Furthermore, during the process of the first radio frequency receiving channel 12 in the signal transceiver unit 1 receiving signals from other wireless devices through the first FEM 13 and the first antenna 14, the wireless device outputs the cancellation signal through the idle first radio frequency transmitting channel 11 in the signal transceiver unit 1, instead of adding a new hardware circuit to output the cancellation signal. Therefore, the wireless device provided in this application embodiment can reduce hardware costs while achieving interference self-cancellation.

[0113] In this embodiment of the application, the target location is located between the first radio frequency receiving channel 12 and the first antenna 14.

[0114] In some embodiments, referring back to Figures 4 or 5, the target location is situated between the first FEM 13 and the first antenna 14. In this scenario, interference signals in the first signal received by the first antenna 14 are eliminated by a cancellation signal before entering the first FEM 13. This prevents the energy of the signal entering the first FEM 13 from being too high, thereby avoiding oversaturation of the first FEM 13 due to excessively high signal energy.

[0115] Optionally, in other embodiments, if the performance of the first FEM13 is superior, such as having a high upper limit for the allowed received signal energy, then, as shown in Figure 7, the target location can also be located between the first RF receiving channel 12 and the first FEM13. In this scenario, interference signals in the first signal are eliminated by a cancellation signal after the first signal received by the first antenna 14 enters the first FEM13. This improves the application flexibility of the wireless device provided in the embodiments of this application.

[0116] The internal structure of the signal coupling module 15 will be described below using the target location shown in Figure 4 as an example. In scenarios where the target location is other locations, the internal structure of the signal coupling module can be referred to in the following embodiments, which will not be described in detail hereafter.

[0117] Figure 8 is a schematic diagram of a signal coupling module provided in an embodiment of this application. As shown in Figure 8, based on the wireless device shown in Figure 4, the signal coupling module 15 includes a first switch 151 and a coupler 152.

[0118] In this embodiment, the signal coupling module 15 can be implemented with a switch and a coupler, further reducing the hardware cost of the wireless device.

[0119] Referring to Figure 8, the first terminal a1 of the first switch 151 is connected to the output terminal of the first radio frequency transmission channel 11, the second terminal a2 of the first switch 151 is connected to the input terminal of the first FEM 13, the third terminal a3 of the first switch 151 is connected to the first terminal b1 of the coupler 152, the second terminal b2 of the coupler 152 is connected to the signal transceiver terminal of the first FEM 13, and the third terminal b3 of the coupler 152 is connected to the first antenna 14.

[0120] Specifically, when the first antenna transmits a signal, the first terminal a1 of the first switch is closed with the second terminal a2 of the first switch; when the first antenna receives a signal, the first terminal a1 of the first switch is closed with the third terminal a3 of the first switch.

[0121] By controlling the on / off state of the first switch 151, the following can be achieved: when the first antenna 14 transmits a signal, the signal transmission link formed by the first radio frequency transmission channel 11, the first FEM 13, and the first antenna 14 works normally to send signals to other wireless devices; when the first antenna 14 receives signals from other wireless devices, the signal reception link formed by the first radio frequency reception channel 12, the first FEM 13, and the first antenna 14 works normally to receive signals from other wireless devices, and the originally idle first radio frequency transmission channel 11 is used to output a cancellation signal, and the cancellation signal is transmitted to the target location through the signal coupling module 15 so that the cancellation signal and the first signal are coupled at the target location, thereby achieving self-interference cancellation.

[0122] Figure 9 is a schematic diagram of the three terminals of a coupler provided in an embodiment of this application. As shown in Figure 9, the three terminals of the coupler have the following functions: the cancellation signal entering from the first terminal b1 of the coupler and the first signal entering from the third terminal b3 of the coupler are coupled inside the coupler, and the second signal is output from the second terminal b2 of the coupler.

[0123] The coupling of two signals can be understood as follows: the amplitudes of two signal points at the same moment in the two signals are added or subtracted to obtain the amplitude of the signal point at that moment in the coupled signal. For example, if the two signal points are in phase, their amplitudes are added to obtain the amplitude of the signal point at that moment in the coupled signal. Or, if the two signal points are in phase, their amplitudes are subtracted to obtain the amplitude of the signal point at that moment in the coupled signal.

[0124] Therefore, the coupler 152 enables the coupling of the cancellation signal output from the first radio frequency transmission channel 11 and the first signal received by the first antenna 14 to the signal transceiver end of the first FEM 13.

[0125] Furthermore, the coupler 152 also prevents the cancellation signal received at the first end b1 of the coupler 152 from being transmitted to the first antenna 14 through the third end b3 of the coupler 152. This improves the self-interference cancellation effect. Additionally, when the first antenna 14 transmits a signal, the signal entering from the second end b2 of the coupler will be directly output from the third end b3 of the coupler, and this signal will essentially not pass through the first end b1 of the coupler.

[0126] It should be noted that the internal structure of the coupler 152 is not limited in this application embodiment, and any coupler that can achieve the above functions can be applied in this application embodiment.

[0127] Figure 10 is a schematic diagram of another signal coupling module provided in an embodiment of this application. As shown in Figure 10, based on the wireless device shown in Figure 8, the signal coupling module 15 further includes a power amplifier (PA) 153. The input terminal of PA153 is connected to the third terminal a3 of the first switch 151, and the output terminal of PA153 is connected to the first terminal b1 of the coupler 152.

[0128] The PA has a corresponding gain. The PA increases the amplitude of the received cancellation signal according to this gain, thereby increasing the energy of the cancellation signal. When applying the embodiments of this application, those skilled in the art can select the gain of the PA based on experience, and the embodiments of this application do not limit the process of selecting the gain of the PA.

[0129] Figure 11 is a schematic diagram of another signal coupling module provided in an embodiment of this application. As shown in Figure 11, based on the wireless device shown in Figure 8, the signal coupling module 15 further includes a second switch 154. The first terminal c1 of the second switch 154 is connected to the first terminal b1 of the coupler 152, the second terminal c2 of the second switch 154 is used for grounding, and the third terminal c3 of the second switch 154 is connected to the third terminal a3 of the first switch 151.

[0130] Specifically, when the first antenna 14 transmits a signal, the first terminal c1 of the second switch 154 and the second terminal c2 of the second switch 154 are closed; when the first antenna 14 receives a signal, the first terminal c1 of the second switch 154 and the third terminal c3 of the second switch 154 are closed.

[0131] When the first antenna 14 transmits a signal, considering that a small amount of signal from the first FEM13 output signal may enter the first terminal b1 of the coupler 152, the first terminal b1 of the coupler 152 is grounded by the second switch 154 when the first antenna 14 transmits a signal, so as to avoid this small amount of signal being transmitted in the signal coupling module 15, thereby causing power consumption waste of other devices in the signal coupling module 15.

[0132] Figure 12 is a schematic diagram of another signal coupling module provided in an embodiment of this application. As shown in Figure 12, based on the wireless device shown in Figure 11, the signal coupling module 15 further includes a resistor 155. The second terminal c2 of the second switch 154 is connected to the first terminal of the resistor 155, and the second terminal of the resistor 155 is used for grounding.

[0133] The resistor 155 can prevent the voltage at the first end b1 of the coupler from being too high when the first antenna 14 transmits a signal.

[0134] The resistance value of resistor 155 can be selected by a technician based on experience, and this application embodiment does not limit the process of how to select the resistance value of resistor 155. For example, the resistance value of resistor 155 is 50 ohms.

[0135] The signal coupling module provided in this application embodiment will be illustrated below using Figure 13 as an example. It should be noted that the signal coupling module shown in Figure 13 does not constitute a limitation on the signal coupling modules shown in Figures 9 to 12 above.

[0136] As shown in Figure 13, the first terminal a1 of the first switch 151 is connected to the output terminal of the first radio frequency transmission channel 11, the second terminal a2 of the first switch 151 is connected to the input terminal of the first FEM 13, the third terminal a3 of the first switch 151 is connected to the input terminal of PA 153, the output terminal of PA 153 is connected to the third terminal c3 of the second switch 154, the first terminal c1 of the second switch 154 is connected to the first terminal b1 of the coupler 152, the second terminal c2 of the second switch is connected to the first terminal of the resistor 155, the second terminal of the resistor 155 is used for grounding, the second terminal b2 of the coupler 152 is connected to the signal transceiver terminal of the first FEM 13, and the third terminal b3 of the coupler 152 is connected to the first antenna 14.

[0137] Referring again to Figure 13, when the first antenna 14 receives a signal, the first terminal a1 and the third terminal a3 of the first switch 151 are closed, and the first terminal c1 and the third terminal c3 of the second switch 154 are closed. In this way, the cancellation signal output by the first radio frequency transmission channel 11 can pass through the first switch 151, PA153 and the second switch 154, and finally reach the first terminal b1 of the coupler 152. The first signal received by the first antenna 14 also reaches the third terminal b3 of the coupler 152. The first signal and the cancellation signal are coupled into a second signal inside the coupler 152. The second signal is output from the second terminal b2 of the coupler 152 to the signal transceiver terminal of the first FEM 13.

[0138] When the first antenna 14 transmits a signal, such as when the first antenna 14 transmits a service signal to other wireless devices, the first terminal a1 and the second terminal a2 of the first switch 151 are closed, and the first terminal c1 and the second terminal c2 of the second switch 154 are closed. In this way, the service signal output by the first radio frequency transmission channel 11 can reach the first antenna 14 through the first switch 151, the first FEM 13 and the coupler 152, so that the service signal can be transmitted through the first antenna.

[0139] The closing of the ports of the first switch 151 and the second switch 154 can, for example, be controlled by a System-on-a-Chip (SOC) in a wireless device. In other words, the SOC can control the closing of the ports of the first switch 151 and the second switch 154 based on the signal transmission and reception status of the first antenna. This application embodiment does not limit the manner in which the SOC controls the closing of the ports of the first switch 151 and the second switch 154.

[0140] The internal structure of the wireless device will be further explained below using the target location shown in Figure 4 as an example.

[0141] Figure 14 is a schematic diagram of another wireless device provided in an embodiment of this application. As shown in Figure 14, based on the wireless device shown in Figure 4, the signal transceiver unit 1 further includes a first digital front end (DEF) transmitting module 16 and a first DFE receiving module 17. The first DFE transmitting module 16 is connected to the first radio frequency transmitting channel 11, and the first DFE receiving module 17 is connected to the first radio frequency receiving channel 12.

[0142] For example, as shown in Figure 14, the output of the first DFE transmitting module 16 is connected to the input of the first RF transmitting channel 11. The input of the first DFE receiving module 17 is connected to the output of the first RF receiving channel 12.

[0143] The first DFE transmitting module 16 processes the received signal in the digital domain and outputs the processed signal to the first RF transmitting channel 11. The first DFE receiving module 17 processes the signal output from the first RF receiving channel 12 in the digital domain. The digital domain processing includes: digital up-conversion of the carrier, digital down-conversion of the carrier, peak clipping, digital predistortion, closed-loop gain control, and voltage standing wave ratio (VSWR) monitoring.

[0144] In this scenario, as shown in Figure 14, the signal transceiver unit 1 further includes a cancellation coefficient training module 18. The cancellation coefficient training module 18 is connected to the interference signal output module 21, the first DFE transmitting module 16, and the first DFE receiving module 17, respectively. The first DFE transmitting module 16 is also connected to the interference signal output module 21. For example, the two input terminals of the cancellation coefficient training module 18 are connected to the output terminals of the interference signal output module 21 and the first DFE receiving module 17, respectively, and the output terminal of the cancellation coefficient training module 18 is connected to the input terminal of the first DFE transmitting module 16.

[0145] The cancellation coefficient training module 18 is used to train cancellation coefficients based on the interference signal received by the first DFE receiving module 17 and the interference signal output by the interference signal output module 21 when the first antenna 14 is not transmitting or receiving service signals. The first DFE transmitting module 16 is used to generate a cancellation signal based on the cancellation coefficients and the interference signal output by the interference signal output module 21 when the first antenna 14 receives signals, and then outputs the cancellation signal through the first radio frequency transmitting channel 11.

[0146] The fact that the first antenna 14 is not transmitting or receiving service signals can be understood as: the first antenna 14 is not transmitting or receiving signals with the antennas on other wireless devices, that is, the wireless device is not communicating with other wireless devices.

[0147] For example, during the system initialization of the wireless device provided in this application embodiment, the wireless device has not yet communicated with other wireless devices. At this time, the second antenna 22 in the interference signal generation unit 2 can be controlled to transmit interference signals, and the interference signals can be received through the first DFE receiving module 17, the first radio frequency receiving channel 12, the first FEM 13 and the first antenna 14 in the signal transceiver unit 1.

[0148] When the first DEF receiving module 17 receives an interference signal, it processes the interference signal and sends the processed interference signal to the cancellation coefficient training module 18. Optionally, the first DEF receiving module 17 may not process the interference signal upon receiving it, but instead directly send the received interference signal to the cancellation coefficient training module 18. Simultaneously, when the interference signal output module 21 outputs an interference signal to the second antenna 22, it also sends the output interference signal to the cancellation coefficient training module 18, so that the cancellation coefficient training module 18 can train and obtain cancellation coefficients based on the interference signal sent by the first DEF receiving module 17 and the interference signal sent by the interference signal output module 21.

[0149] After training, the cancellation coefficient training module 18 sends the cancellation coefficient to the first DEF transmission module 16, which then buffers the cancellation coefficient. Subsequently, when the first antenna 14 receives signals from other wireless devices, the first DEF transmission module 16 can output the corresponding cancellation signal based on the cancellation coefficient and the interference signal output by the current time interference signal output module 21.

[0150] The following example illustrates the cancellation coefficients obtained from the cancellation coefficient training module.

[0151] For ease of explanation, the interference signal sent from the first DFE receiving module 17 to the cancellation coefficient training module 18 is labeled as interference signal y, and the interference signal sent from the interference signal output module 21 to the cancellation coefficient training module 18 is labeled as interference signal A. The relationship between these two interference signals can be expressed as follows:

[0152] y = Ah + w

[0153] Where h is the cancellation coefficient and w is the received noise, which can be determined based on the signal-to-noise ratio of the wireless device and the power of the signal received by the first antenna, and will not be described in detail here.

[0154] For example, interference signal A can be represented as follows:

[0155]

[0156] Where, x pr x represents the discrete sampling points in the interference signal A. pr The data includes the amplitude and phase of the sampling point. n is the number of sampling points. It should be noted that the above formula is used as an example to represent the interference signal A. Optionally, the interference signal A can be represented in other ways, which will not be illustrated here.

[0157] Given y, A, and w, the cancellation coefficient h can be solved iteratively using the least squares method. The principle behind this method is to adjust the value of h until the following formula reaches its minimum, and then use the final adjusted value of h as the cancellation coefficient.

[0158]

[0159] Accordingly, the value of h after the last adjustment can be expressed by the following formula:

[0160]

[0161] Alternatively, given y, A, and w, the cancellation coefficients can be solved using other methods. For example, linear least squares (LLS), least mean squares (LMS), recursive least squares (RLS), and normalized least mean squares (NMLS) can be used, but these will not be illustrated here.

[0162] Additionally, in Figure 14, the cancellation coefficient training module 18 is a module independent of the first DEF transmission module 16. Optionally, the cancellation coefficient training module 18 can also be integrated inside the first DEF transmission module 16, that is, the first DEF transmission module 16 implements the cancellation coefficient training process. This embodiment of the application does not limit this.

[0163] Furthermore, based on the wireless device shown in Figure 14, as shown in Figure 15, the signal transceiver unit 1 further includes a first baseband modulation module 19 and a first baseband demodulation module 110. The first baseband modulation module 19 is connected to the first DFE transmitting module 16, and the first baseband demodulation module 110 is connected to the first DFE receiving module 17.

[0164] For example, the output of the first baseband modulation module 19 is connected to the input of the first DFE transmitting module 16, and the input of the first baseband demodulation module 110 is connected to the output of the first DFE receiving module 17.

[0165] The first baseband modulation module 19 is used to perform carrier modulation on the baseband signal to obtain the service signal to be transmitted. The first baseband demodulation module 110 is used to perform carrier demodulation on the received signal to obtain the data carried in the service signal received by the first antenna 14.

[0166] In the wireless device shown in Figure 15, when the first antenna 14 transmits a signal, such as when the first antenna 14 transmits a service signal to the antenna in another wireless device, the first baseband modulation module 19, the first DFE transmission module 16, the first radio frequency transmission channel 11, and the first FEM 13 are in working state, while the first baseband demodulation module 110, the first DFE receiving module 17, and the first radio frequency receiving channel 12 are in idle state.

[0167] When the first antenna 14 receives signals, such as when it receives service signals transmitted from antennas in other wireless devices, the first baseband demodulation module 110, the first DFE receiving module 17, and the first radio frequency receiving channel 12 are in operation to demodulate the service signals received by the first antenna 14. Furthermore, the first DFE transmitting module 16 and the first radio frequency transmitting channel 11 are also in operation to output cancellation signals corresponding to interference signals.

[0168] It should be noted that during the process of outputting cancellation signals by the first DFE transmitting module 16 and the first RF transmitting channel 11, since there is no need to transmit service signals at present, the first baseband modulation module 19 does not need to work. The cancellation signal can be output simply through the first DFE transmitting module 16 and the first RF transmitting channel 11.

[0169] Furthermore, the internal structure of the interference signal generation unit 2 can, for example, be basically the same as the internal structure of the signal transceiver unit 1. In other words, the interference signal generation unit 2 can be understood as a special signal transceiver unit. For example, if a wireless device includes multiple signal transceiver units, one of the signal transceiver units can be configured as the interference signal generation unit 2 to transmit interference signals, while the other signal transceiver units serve as the signal transceiver units 1 for normal transmission and reception of service signals.

[0170] Figure 16 is a schematic diagram of the structure of an interference signal generation unit provided in an embodiment of this application. As shown in Figure 16, the interference signal output module 21 in the interference signal generation unit 2 includes a second baseband modulation module, a second baseband demodulation module, a second DFE transmitting module, a second DFE receiving module, a second RF transmitting channel, a second RF receiving channel, and a second FEM. The connection relationships between these components can be referred to the connection relationships between the components in the signal transceiver unit 1 in Figure 15, and will not be repeated here.

[0171] Referring again to Figure 16, when the second antenna 22 needs to transmit interference signals, the second DFE transmitting module, the second RF transmitting channel, the second FEM, and the second antenna are in operation to transmit interference signals.

[0172] The second DEF transmitting module is used to output the digital domain interference signal, which is then converted into the radio frequency domain interference signal by the second radio frequency transmitting channel, and then transmitted through the second FEM and the second antenna.

[0173] Referring again to Figure 16, the interference signal generation unit also includes an interference signal parameter module. This module can be integrated within the second DFE transmitting module or it can be a separate module independent of the second DFE transmitting module. This interference signal parameter module is used to output relevant information about the interference signal, such as the amplitude and phase of the interference signal, so that the second DFE transmitting module can output the interference signal based on this information. This embodiment does not provide a detailed description of how the second DEF outputs the digital domain interference signal.

[0174] Furthermore, the above embodiment is illustrated using a single interference signal generation unit as an example. Optionally, the wireless device can also transmit interference signals using multiple interference signal generation units. Figure 17 is a schematic diagram of another wireless device provided in an embodiment of this application. As shown in Figure 17, the wireless device includes multiple interference signal generation units 2, with two interference signal generation units 2 shown as an example. Each interference signal generation unit 2 includes an interference signal output module 21 and a second antenna 22 connected to the interference signal output module 21.

[0175] Each jamming signal output module 21 is used to output jamming signals to the connected second antenna 22. In this way, the complexity of the jamming signals actively transmitted by the wireless device can be increased.

[0176] The interference signals emitted by different second antennas can be the same or different, and this application does not limit this in the embodiments.

[0177] In addition, the internal structure of each interference signal output module 21 in Figure 17 can be referred to Figure 16, and will not be described again here.

[0178] In the scenario shown in Figure 17, the cancellation coefficient training module 18 is connected to each interference signal output module 21 to obtain the interference signal output by each interference signal output module 21 when the first antenna 14 is not transmitting or receiving service signals. Then, based on the interference signals output by each of the multiple interference signal output modules 21 and the interference signal received by the first DFE receiving module 17, the cancellation coefficient is trained.

[0179] In addition, each interference signal output module 21 is connected to the first DFE transmission module 16 so that when the first antenna 14 receives a signal, such as a signal from another wireless device, the first DFE transmission module 16 can output a cancellation signal based on the interference signals output by each of the multiple interference signal output modules 21 at the current time and the cancellation coefficients that have been trained.

[0180] In summary, in this embodiment, during the process of the first radio frequency receiving channel 12 in the signal transceiver unit 1 receiving signals from other wireless devices through the first FEM 13 and the first antenna 14, the interference signal output module 21 in the interference signal generation unit 2 transmits interference signals through the second antenna 22. Thus, if an attacker is eavesdropping on signals transmitted by other wireless devices, the attacker will simultaneously receive the interference signal transmitted by that wireless device, preventing the attacker from successfully deciphering the signals transmitted by other wireless devices.

[0181] Furthermore, during the process of the first radio frequency receiving channel 12 in the signal transceiver unit receiving signals from other wireless devices through the first FEM 13 and the first antenna 14, the first radio frequency transmitting channel 13 in the signal transceiver unit outputs a self-cancelling signal corresponding to the interference signal, and couples the cancellation signal and the first signal received by the first antenna 14 at the target location through the signal coupling module, so as to eliminate the interference signal in the first signal through the cancellation signal. In other words, the wireless device provided in this application embodiment can achieve interference self-cancellation.

[0182] Furthermore, during the process of the first radio frequency receiving channel 12 in the signal transceiver unit 1 receiving signals from other wireless devices through the first FEM 13 and the first antenna 14, the wireless device outputs the cancellation signal through the idle first radio frequency transmitting channel 11 in the signal transceiver unit 1, instead of adding a new hardware circuit to output the cancellation signal. Therefore, the wireless device provided in this application embodiment can reduce hardware costs while achieving interference self-cancellation.

[0183] Furthermore, in scenarios where multiple signal transceiver units receive signals simultaneously in a wireless device, since the radio frequency transmission channels in each signal transceiver unit are in an idle state, each signal transceiver unit can achieve interference self-cancellation through its own idle radio frequency transmission channels, further reducing the hardware cost of the wireless device.

[0184] Furthermore, in this embodiment, the wireless device outputs the cancellation signal through the first radio frequency (RF) transmission channel in the signal transceiver unit. This first RF transmission channel converts the digital domain signal into an RF domain signal. Therefore, in this embodiment, the RF domain cancellation signal and the first RF domain signal are coupled together. Compared to eliminating interference signals in the first signal in the digital domain using algorithms, the interference self-cancellation scheme of the wireless device in this embodiment is more effective.

[0185] Furthermore, the various components in the wireless devices shown in Figures 4 to 17 can be integrated into different chips within the wireless device as needed. Examples of chips within the wireless device are described below.

[0186] Scenario 1: Wireless devices include SOC, RFIC, and FEM independent of SOC and RFIC.

[0187] Figure 18 is a schematic diagram of the chip layout of a wireless device in scenario 1 provided by an embodiment of this application. The components in the wireless device in Figure 18 are based on the wireless device shown in Figure 16.

[0188] Referring to Figure 18, the second baseband modulation module, the second baseband demodulation module, the second DFE transmission module, and the second DFE reception module in the interference signal generation unit 2, as well as the first baseband modulation module, the first baseband demodulation module, the first DFE transmission module, the first DFE reception module, and the cancellation coefficient training module in the signal transceiver unit 1, are all modules in the SOC.

[0189] Referring again to Figure 18, the second radio frequency transmission channel and the second radio frequency reception channel in the interference signal generation unit 2, and the first radio frequency transmission channel and the first radio frequency reception channel in the signal transceiver unit 1 are components in the RFIC.

[0190] Referring again to Figure 18, the first FEM and the second FEM are other components independent of the SOC and RFIC.

[0191] In the scenario shown in Figure 18, if the target location is between the first FEM 13 and the first antenna 14, the signal coupling module 15 can be independently mounted on the printed circuit board (PCB) of the wireless device, separate from the SOC and RFIC. In this scenario, there is no need to modify the internal chip of the wireless device; only the signal coupling module 15 for coupling the cancellation signal and the first signal needs to be added to the PCB of the wireless device, which reduces the hardware cost of the wireless device in achieving interference self-cancellation.

[0192] Optionally, in the scenario shown in Figure 18, if the target location is between the first RF receiving channel 12 and the first FEM 13, the signal coupling module 15 can be installed on the PCB of the wireless device independently of the SOC and RFIC. Optionally, the signal coupling module can also be integrated inside the RFIC.

[0193] Scenario 2: The wireless device includes a SOC and an RFIC, where the RFIC integrates an FEM.

[0194] Figure 19 is a schematic diagram of the chip layout of a wireless device in scenario 2 according to an embodiment of this application. The components in the wireless device in Figure 19 are based on the wireless device shown in Figure 16.

[0195] Referring to Figure 19, the second baseband modulation module, the second baseband demodulation module, the second DFE transmission module, and the second DFE reception module in the interference signal generation unit 2, as well as the first baseband modulation module, the first baseband demodulation module, the first DFE transmission module, the first DFE reception module, and the cancellation coefficient training module in the signal transceiver unit 1, are all modules in the SOC.

[0196] Referring again to Figure 19, the second RF transmitting channel, the second RF receiving channel, and the second FEM in the interference signal generation unit 2, and the first RF transmitting channel, the first RF receiving channel, and the first FEM in the signal transceiver unit 1 are components of the RFIC. That is, the first FEM and the second FEM are integrated into the RFIC.

[0197] In this scenario, since the first FEM is integrated inside the RFIC, the signal coupling module can be integrated together with the first FEM inside the RFIC.

[0198] Furthermore, the foregoing embodiments are illustrated using a single signal transceiver unit 1 as an example. Optionally, in the embodiments of this application, the wireless device may further include multiple signal transceiver units 1, each of which can implement the interference self-cancellation scheme provided in the embodiments of this application.

[0199] Figure 20 is a schematic diagram of another wireless device provided in an embodiment of this application. As shown in Figure 20, the wireless device includes an interference signal generation unit 2 and multiple signal transceiver units 1. Figure 20 uses two signal transceiver units 1 as an example. The internal structure of the interference signal generation unit 2 and each signal transceiver unit 1 can be referred to the relevant content in Figure 18, and will not be described again here.

[0200] As shown in Figure 20, each signal transceiver unit 1 includes a cancellation coefficient training module 18, which is used to train and obtain cancellation coefficients. This arrangement is because, considering the different distances between different signal transceiver units 1 and the interference signal generation unit 1, the energy of the interference signals received by different signal transceiver units 1 varies. Therefore, each signal transceiver unit 1 needs to train and obtain cancellation coefficients based on the interference signals it receives. In other words, the cancellation coefficients trained by the cancellation coefficient training modules 18 in different signal transceiver units 1 are different.

[0201] The process of training cancellation coefficients in the cancellation coefficient training module 18 of different signal transceiver units 1 can be referred to the aforementioned embodiments, and will not be repeated here.

[0202] Furthermore, in this embodiment, the parameters of the interference signal output by the interference signal generation unit can be flexibly set. The parameters of the interference signal are explained below.

[0203] (1) Flexible setting of the bandwidth of interference signals.

[0204] The bandwidth of the interference signal can be understood as the difference between the maximum and minimum frequencies in the frequency distribution of the interference signal.

[0205] In some embodiments, the bandwidth of the interference signal can be equal to or greater than the bandwidth of the service signal received by the first antenna. This allows interference to be achieved across all frequency bands of the service signal.

[0206] Before receiving service signals from other wireless devices, the two devices exchange control information. Through this control information, the wireless device can obtain basic information about the service signals from other wireless devices, such as the frequency distribution of the service signals.

[0207] As shown in Figure 21, in scenario 1, the frequency distribution of the interference signal is completely consistent with the frequency distribution of the service signal. That is, the starting position of the interference signal's frequency distribution is the same as the starting position of the frequency partition of the service signal received by the first antenna, and the ending position of the interference signal's frequency distribution is the same as the ending position of the frequency partition of the service signal received by the first antenna. In this scenario, the bandwidth of the interference signal is equal to the bandwidth of the service signal received by the first antenna.

[0208] Referring again to Figure 21, in scenario 2, the starting position of the frequency distribution of the interference signal is less than the starting position of the frequency partition of the service signal received by the first antenna, and the ending position of the frequency distribution of the interference signal is equal to the ending position of the frequency partition of the service signal received by the first antenna. In this scenario, the bandwidth of the interference signal is greater than the bandwidth of the service signal received by the first antenna.

[0209] Alternatively, in other embodiments, the bandwidth of the interfering signal may be less than the bandwidth of the service signal received by the first antenna. This eliminates the need to interfere with the entire frequency band of the service signal; interference is only required on a portion of the frequency band, thereby reducing the difficulty for the wireless device to achieve interference self-cancellation.

[0210] As shown in Figure 22, for the interference signal indicated by the solid line in scenario 3, the starting position of the frequency distribution of the interference signal is the same as the starting position of the frequency partition of the service signal received by the first antenna, and the ending position of the frequency distribution of the interference signal is less than the ending position of the frequency partition of the service signal received by the first antenna, so as to achieve that the bandwidth of the interference signal is less than the bandwidth of the service signal received by the first antenna.

[0211] Referring again to Figure 22, for the interference signal shown by the dashed line in scenario 3, the starting position of the frequency distribution of the interference signal is greater than the starting position of the frequency partition of the service signal received by the first antenna, and the ending position of the frequency distribution of the interference signal is less than the ending position of the frequency partition of the service signal received by the first antenna, so as to achieve that the bandwidth of the interference signal is less than the bandwidth of the service signal received by the first antenna.

[0212] In scenarios where the bandwidth of the interference signal is less than the bandwidth of the service signal received by the first antenna, the bandwidth of the interference signal needs to be greater than a bandwidth threshold to ensure the security of the signal received by the first antenna in the wireless device. This bandwidth threshold can be configured by technicians based on simulation results; the simulation process is not described in detail in this embodiment.

[0213] In scenario 3 shown in Figure 22, the frequency distribution of the interference signal is a continuous frequency range. Optionally, the frequency distribution of the interference signal may also include multiple discontinuous frequency ranges, where the sum of the sizes of the multiple frequency ranges is less than the bandwidth of the service signal received by the first antenna. This allows for flexible interference of the service signal received by the first antenna in different frequency ranges, improving the flexibility of the interference signal.

[0214] As shown in Figure 23, in scenario 4, the frequency distribution of the interference signal includes three frequency intervals. Each of these three frequency intervals is a sub-interval in the frequency distribution of the service signal, and the sum of the interval sizes of these three frequency intervals is less than the bandwidth of the service signal received by the first antenna, so as to achieve that the bandwidth of the interference signal is less than the bandwidth of the service signal received by the first antenna.

[0215] It should be noted that Figure 23 is used to illustrate the distribution of multiple discontinuous frequency intervals. The embodiments of this application do not limit the total number of multiple discontinuous frequency intervals or the position of each frequency interval.

[0216] (2) The duration of the interference signal can be flexibly set.

[0217] In WLAN, data exchange between different wireless devices is conducted in Physical Layer Protocol Data Unit (PPDU) format. Therefore, the duration of a service signal can be understood as the duration of one PPDU.

[0218] Before receiving service signals from other wireless devices, a wireless device can determine the reception time period of the service signal based on the control information sent by other wireless devices, that is, determine the duration of the service signal.

[0219] In some embodiments, the duration of the interference signal can be equal to or greater than the duration of the service signal received by the first antenna. This interference signal can thus disrupt all information in the service signal received by the first antenna.

[0220] As shown in Figure 24, in scenario 1, the transmission period of the interference signal is exactly the same as the reception period of the service signal received by the first antenna. That is, the start position of the transmission period of the interference signal is the same as the start position of the reception period of the service signal received by the first antenna, and the end position of the transmission period of the interference signal is the same as the end position of the reception period of the service signal received by the first antenna. In this scenario, the duration of the interference signal is equal to the duration of the service signal received by the first antenna.

[0221] Referring again to Figure 24, in scenario 2, the start position of the transmission period of the interference signal is less than the start position of the reception period of the service signal received by the first antenna, and the end position of the transmission period of the interference signal is equal to the end position of the reception period of the service signal received by the first antenna. In this scenario, the duration of the interference signal is greater than the duration of the service signal received by the first antenna.

[0222] Optionally, in other embodiments, the duration of the interference signal can be shorter than the duration of the service signal received by the first antenna. This eliminates the need to interfere with all information of the service signal; interference with only a portion of the service signal is sufficient, thereby reducing the difficulty for the wireless device to achieve self-cancellation of interference.

[0223] As shown in Figure 25, for the interference signal shown by the solid line in scenario 3, the starting position of the transmission time period of the interference signal is the same as the starting position of the reception time period of the service signal received by the first antenna, and the ending position of the transmission time period of the interference signal is less than the ending position of the reception time period of the service signal received by the first antenna, so as to achieve that the duration of the interference signal is less than the duration of the service signal received by the first antenna.

[0224] Referring again to Figure 25, for the interference signal shown by the dashed line in scenario 3, the starting position of the transmission time period of the interference signal is greater than the starting position of the reception time period of the service signal received by the first antenna, and the ending position of the transmission time period of the interference signal is less than the ending position of the reception time period of the service signal received by the first antenna, so as to achieve that the duration of the interference signal is less than the duration of the service signal received by the first antenna.

[0225] In scenarios where the duration of the interference signal is shorter than the duration of the service signal received by the first antenna, the duration of the interference signal needs to be greater than a duration threshold to ensure the security of the signal received by the first antenna in the wireless device. This duration threshold can be configured by technicians based on simulation results; the simulation process is not described in detail in this embodiment.

[0226] Figure 25 shows an example of an interference signal. Optionally, the interference signal includes multiple interference sub-signals transmitted sequentially; the total duration of the multiple interference sub-signals is less than the duration of the service signal. In the embodiments of this application, the service signal can be flexibly interfered with at multiple different time periods, improving the flexibility of the interference signal.

[0227] As shown in Figure 26, in scenario 4, the interference signal can be interference signal 1, interference signal 2, or interference signal 3. Among them, interference signal 1 includes 3 interference sub-signals, while interference signal 2 and interference signal 3 each include 2 interference sub-signals.

[0228] It should be noted that Figure 26 is used to illustrate the distribution of multiple interference sub-signals. This application embodiment does not limit the total number of interference sub-signals or the position of each interference sub-signal. When applying this application embodiment, the interference sub-signals can be flexibly set according to requirements.

[0229] In addition, this application also provides a signal processing method for a wireless device. The wireless device includes a signal transceiver unit and an interference signal generation unit. The signal transceiver unit includes a first radio frequency transmitting channel, a first radio frequency receiving channel, a first radio frequency front-end module (FEM), a first antenna, and a signal coupling module. The interference signal generation unit includes an interference signal output module and a second antenna.

[0230] As shown in Figure 27, the method includes the following step 2701.

[0231] Step 2701: When the first antenna receives a signal, the interference signal output module outputs an interference signal to the second antenna, and the first radio frequency transmission channel outputs a cancellation signal corresponding to the interference signal. The signal coupling module couples the cancellation signal with the first signal at the target location. The first signal is the signal received by the first antenna, and the target location is located between the first radio frequency receiving channel and the first antenna.

[0232] In some embodiments, the signal coupling module includes a first switch and a coupler. A first end of the first switch is connected to the output of a first radio frequency transmission channel, a second end of the first switch is connected to the input of a first FEM, a third end of the first switch is connected to the first end of the coupler, a second end of the coupler is connected to the signal transceiver of the first FEM, and a third end of the coupler is connected to a first antenna.

[0233] In this scenario, when the first antenna transmits a service signal, the first terminal of the first switch is closed to the second terminal of the first switch; when the first antenna receives a service signal, the first terminal of the first switch is closed to the third terminal of the first switch.

[0234] For example, the signal coupling module also includes a second switch, the first end of which is connected to the first end of the coupler, the second end of which is used for grounding, and the third end of which is connected to the third end of the first switch.

[0235] In this scenario, when the first antenna transmits a service signal, the first terminal of the second switch is closed to the second terminal of the second switch; when the first antenna receives a service signal, the first terminal of the second switch is closed to the third terminal of the second switch.

[0236] The implementation method and related technical effects of the signal processing method shown in Figure 27 can be referred to the foregoing embodiments, and will not be repeated here.

[0237] In addition, this application embodiment also provides a chip that is applied to a wireless device. As shown in FIG28, the chip 2800 includes a first radio frequency transmitting channel, a first radio frequency receiving channel, and a signal coupling module.

[0238] The first radio frequency transmitting channel and the first radio frequency receiving channel are respectively used to connect to the first FEM, the first FEM is used to connect to the first antenna, the signal coupling module is respectively connected to the first radio frequency transmitting channel and the target position, and the target position is located between the first radio frequency receiving channel and the first antenna.

[0239] The first radio frequency transmission channel is used to output a cancellation signal corresponding to the interference signal when the first antenna receives a signal. The interference signal is transmitted by the second antenna in the interference signal generation unit in the wireless device.

[0240] The signal coupling module is used to couple the cancellation signal and the first signal at the target location, where the first signal is the signal received by the first antenna.

[0241] The first radio frequency receiving channel is used to receive the second signal, which is the signal after coupling the first signal and the cancellation signal.

[0242] In some embodiments, as shown in FIG29, chip 2800 further includes a first FEM.

[0243] The implementation method and related technical effects of the chips provided in Figures 28 and 29 can be referred to the aforementioned embodiments, and will not be repeated here.

[0244] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0245] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects, and should not be construed as indicating or implying relative importance.

[0246] In the description of the embodiments in this application, unless otherwise stated, "at least one" means one or more. "More than one" means two or more.

[0247] A references B, which means that A is the same as B or A is a simple variation of B.

[0248] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that there are three possible relationships. For example, A and / or B means: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0249] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A wireless device, characterized in that, The wireless device includes a signal transceiver unit and an interference signal generation unit. The signal transceiver unit includes a first radio frequency (RF) transmitting channel, a first RF receiving channel, a first RF front-end module (FEM), a first antenna, and a signal coupling module. The interference signal generation unit includes an interference signal output module and a second antenna. The first RF transmitting channel and the first RF receiving channel are respectively connected to the first FEM, and the first FEM is also connected to the first antenna. The signal coupling module is respectively connected to the first RF transmitting channel and a target location, where the target location is located between the first RF receiving channel and the first antenna. The interference signal output module is connected to the second antenna. The interference signal output module is used to output an interference signal to the second antenna when the first antenna receives a signal. The first RF transmitting channel is used to output a cancellation signal corresponding to the interference signal when the first antenna receives a signal. The signal coupling module is used to couple the cancellation signal with a first signal at the target location, where the first signal is the signal received by the first antenna. The first radio frequency receiving channel is used to receive a second signal, which is a signal obtained by coupling the first signal and the cancellation signal.

2. The wireless device as described in claim 1, characterized in that, The target location is located between the first FEM and the first antenna.

3. The wireless device as described in claim 2, characterized in that, The signal coupling module includes a first switch and a coupler; a first end of the first switch is connected to the output end of the first radio frequency transmission channel, a second end of the first switch is connected to the input end of the first FEM, a third end of the first switch is connected to the first end of the coupler, a second end of the coupler is connected to the signal transceiver end of the first FEM, and a third end of the coupler is connected to the first antenna.

4. The wireless device as described in claim 3, characterized in that, When the first antenna transmits a signal, the first terminal of the first switch is closed to the second terminal of the first switch; when the first antenna receives a signal, the first terminal of the first switch is closed to the third terminal of the first switch.

5. The wireless device as described in claim 3 or 4, characterized in that, The signal coupling module further includes a power amplifier PA; the input terminal of the PA is connected to the third terminal of the first switch, and the output terminal of the PA is connected to the first terminal of the coupler.

6. The wireless device as described in any one of claims 3-5, characterized in that, The signal coupling module further includes a second switch; the first end of the second switch is connected to the first end of the coupler, the second end of the second switch is used for grounding, and the third end of the second switch is connected to the third end of the first switch.

7. The wireless device as described in claim 6, characterized in that, When the first antenna transmits a signal, the first terminal of the second switch is closed to the second terminal of the second switch; when the first antenna receives a signal, the first terminal of the second switch is closed to the third terminal of the second switch.

8. The wireless device as described in claim 6 or 7, characterized in that, The signal coupling module further includes a resistor; the second terminal of the second switch is connected to the first terminal of the resistor, and the second terminal of the resistor is used for grounding.

9. The wireless device as described in any one of claims 1-8, characterized in that, The signal transceiver unit further includes a first digital front-end (DFE) transmitting module, a first DFE receiving module, and a cancellation coefficient training module. The first DFE transmitting module is connected to the first radio frequency (RF) transmitting channel, and the first DFE receiving module is connected to the first RF receiving channel. The cancellation coefficient training module is connected to the interference signal output module, the first DFE receiving module, and the first DFE transmitting module, respectively. The first DFE transmitting module is also connected to the interference signal output module. The cancellation coefficient training module is used to train a cancellation coefficient based on the interference signal received by the first DFE receiving module and the interference signal output by the interference signal output module when the first antenna is not transmitting or receiving service signals. The first DFE transmitting module is used to generate the cancellation signal based on the cancellation coefficient and the interference signal output by the interference signal output module when the first antenna receives a signal.

10. The wireless device as described in any one of claims 1-9, characterized in that, The bandwidth of the interference signal is less than the bandwidth of the service signal received by the first antenna.

11. The wireless device as claimed in claim 10, characterized in that, The frequency distribution of the interference signal includes multiple discontinuous frequency intervals, and the sum of the interval sizes of the multiple frequency intervals is less than the bandwidth of the service signal.

12. The wireless device as described in any one of claims 1-11, characterized in that, The duration of the interference signal is less than the duration of the service signal received by the first antenna.

13. The wireless device as claimed in claim 12, characterized in that, The interference signal includes multiple interference sub-signals transmitted sequentially; the total duration of the multiple interference sub-signals is less than the duration of the service signal.

14. The wireless device as described in any one of claims 1-13, characterized in that, The wireless device is an access point (AP), and the first signal includes uplink signals from a station (STA).

15. A signal processing method for a wireless device, characterized in that, The wireless device includes a signal transceiver unit and an interference signal generation unit. The signal transceiver unit includes a first radio frequency (RF) transmitting channel, a first RF receiving channel, a first RF front-end module (FEM), a first antenna, and a signal coupling module. The interference signal generation unit includes an interference signal output module and a second antenna. The method includes: when the first antenna receives a signal, the interference signal output module outputs an interference signal to the second antenna, and the first RF transmitting channel outputs a cancellation signal corresponding to the interference signal. The signal coupling module couples the cancellation signal with a first signal at a target location. The first signal is the signal received by the first antenna, and the target location is located between the first RF receiving channel and the first antenna.

16. The method as described in claim 15, characterized in that, The signal coupling module includes a first switch and a coupler. A first end of the first switch is connected to the output end of the first radio frequency transmission channel, a second end of the first switch is connected to the input end of the first FEM, a third end of the first switch is connected to the first end of the coupler, a second end of the coupler is connected to the signal transceiver end of the first FEM, and a third end of the coupler is connected to the first antenna. When the first antenna transmits a service signal, the first end and the second end of the first switch are closed; when the first antenna receives a service signal, the first end and the third end of the first switch are closed.

17. The method as described in claim 16, characterized in that, The signal coupling module further includes a second switch, the first end of which is connected to the first end of the coupler, the second end of which is grounded, and the third end of which is connected to the third end of the first switch. When the first antenna transmits a service signal, the first end of the second switch and the second end of the second switch are closed. When the first antenna receives a service signal, the first end of the second switch and the third end of the second switch are closed.

18. A chip, characterized in that, The chip is used in a wireless device and includes a first radio frequency (RF) transmitting channel, a first RF receiving channel, and a signal coupling module. The first RF transmitting channel and the first RF receiving channel are respectively used to connect to a first field antenna (FEM), the first FEM is used to connect to a first antenna, and the signal coupling module is respectively connected to the first RF transmitting channel and a target location, the target location being located between the first RF receiving channel and the first antenna. The first RF transmitting channel is used to output a cancellation signal corresponding to the interference signal when the first antenna receives a signal, the interference signal being transmitted by the second antenna in the interference signal generation unit of the wireless device. The signal coupling module is used to couple the cancellation signal with a first signal at the target location, wherein the first signal is the signal received by the first antenna; The first radio frequency receiving channel is used to receive a second signal, which is a signal obtained by coupling the first signal and the cancellation signal.

19. The chip as described in claim 18, characterized in that, The chip also includes the first FEM.

Images