A signal transceiving circuit, a signal transceiving method, an electronic device, and a networking system

Abstract

The embodiment of the application provides a signal transceiving circuit, a signal transceiving method, an electronic device and a networking system. The signal transceiving circuit comprises a radar waveform generator, a local frequency source, an up-conversion frequency mixer and a first switch. A first end of the first switch is used for on-off coupling with an output end of the radar waveform generator or an output end of a first digital-to-analog converter. The first digital-to-analog converter is used for providing a baseband service transmission signal. A second end of the first switch is coupled with an input end of the up-conversion frequency mixer, and a local oscillation port of the up-conversion frequency mixer is coupled with an output end of the local frequency source. When the first end of the first switch is on-off coupled with the output end of the radar waveform generator, an output end of the up-conversion frequency mixer is used for outputting a radar detection signal; when the first end of the first switch is on-off coupled with the output end of the first digital-to-analog converter, the output end of the up-conversion frequency mixer is used for outputting a radio frequency service transmission signal. The embodiment reduces power consumption and cost, and achieves the purpose of practical application.

Description

Technical Field

[0001] This application relates to the fields of radar sensing and detection and wireless communication technology, and in particular to a signal transceiver circuit, a signal transceiver method, an electronic device and a networking system. Background Technology

[0002] Microwave-based radar detection technology is widely used in various Internet of Things (IoT) electronic devices. In these devices, radar detection signal transceiver circuits are designed and implemented using integrated circuits or chips to achieve integration and miniaturization. With the increasing intelligence of electronic devices, their demand for wireless communication capabilities is also increasing. For example, electronic devices need wireless communication capabilities to receive control and scheduling from central control equipment, or to transmit relevant operational data to central control equipment. However, currently, almost all radar detection signal transceiver circuits do not integrate wireless communication functionality. To meet the wireless communication requirements of electronic devices, additional wireless communication-related components are usually configured, but this leads to a significant increase in hardware cost, power consumption, and area overhead.

[0003] An improved existing technology involves designing a composite baseband circuit within the signal transceiver circuit. This composite baseband circuit functions as both a radar detection signal outputting a digital signal to a digital-to-analog converter (DAC) and a service signal transmitted via wireless communication. Based on this improved architecture, the signal transceiver circuit architecture for multiplexing wireless communication can achieve integrated wireless communication and radar detection. However, this improved architecture does not optimize the intermediate frequency (IF) and digital sections. Consequently, its radar detection and wireless communication functions suffer from slow response speed, high power consumption, and poor compatibility. Furthermore, as a communication method, it lacks design considerations for practical applications such as related protocols, channel control, and operational condition control. In summary, this improved approach remains at the theoretical conceptual level, providing a theoretical design from analog to radio frequency perspective. It lacks practicality in both hardware structure and software design, making it difficult to apply in real-world scenarios. Summary of the Invention

[0004] This application provides a signal transceiver circuit, a signal transceiver method, an electronic device, and a networking system, which improves the practicality of the integrated signal transceiver circuit that combines radar detection and wireless communication functions, and achieves the purpose of practical application.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a signal transceiver circuit is provided, comprising a radar waveform generator, a local oscillator frequency source, an up-conversion mixer, and a first switch. A first terminal of the first switch is used for selective coupling with either the output terminal of the radar waveform generator or the output terminal of a first digital-to-analog converter (DAC). The output terminal of the first DAC is used to provide a baseband service transmission signal in analog signal form. A second terminal of the first switch is coupled with the input terminal of the up-conversion mixer. The local oscillator port of the up-conversion mixer is coupled with the output terminal of the local oscillator frequency source. Specifically, when the first terminal of the first switch is selectively coupled with the output terminal of the radar waveform generator, the output terminal of the up-conversion mixer is used to output a radar detection signal; when the first terminal of the first switch is selectively coupled with the output terminal of the first DAC, the output terminal of the up-conversion mixer is used to output a radio frequency service transmission signal.

[0007] In this embodiment, the intermediate frequency (IF) and digital sections of the architecture are optimized. A first switch is designed to selectively couple a first digital-to-analog converter (DAC) to receive the baseband service transmission signal in analog form output from the DAC. This analog signal is then transmitted to an up-conversion mixer for up-conversion mixing, resulting in a mixed signal for radio frequency (RF) service transmission, enabling wireless communication. Alternatively, the first switch can also selectively couple a radar waveform generator to receive the radar pulse signal output from the generator. This radar pulse signal is then transmitted to an up-conversion mixer for up-conversion mixing, resulting in a mixed signal for radar detection. Compared to the prior art using a composite baseband circuit to provide both the radar pulse signal for radar detection and the baseband service transmission signal for wireless communication, the application architecture of this application offers the following advantages: When the signal transceiver circuit is in radar detection mode, the radar pulse signal generated by the radar waveform generator and directly up-converted by the up-conversion mixer can generate the sensing waveform required for radar detection. This solution uses a radar waveform generator combined with an upconversion mixer architecture, which can greatly reduce power consumption in radar detection mode to meet the power consumption design requirements of practical applications, thus benefiting the practical application of the solution.

[0008] In one possible implementation, the signal transceiver circuit further includes a down-conversion mixer and a second switch. The first terminal of the second switch is used for selective coupling with the output terminal of the local oscillator frequency source or the output terminal of the up-conversion mixer, and the second terminal of the second switch is coupled to the local oscillator port of the down-conversion mixer. Specifically, when the first terminal of the first switch is selectively coupled to the output terminal of the radar waveform generator, the first terminal of the second switch is selectively coupled to the output terminal of the up-conversion mixer, and the input terminal of the down-conversion mixer receives the echo signal of the radar detection signal. When the first terminal of the first switch is selectively coupled to the output terminal of the first digital-to-analog converter, the first terminal of the second switch is selectively coupled to the output terminal of the local oscillator frequency source, and the input terminal of the down-conversion mixer receives the radio frequency service received signal. In this embodiment, the following advantages are available: Advantage 1: By performing down-conversion mixing processing on the echo signal based on the radar detection signal obtained from the local oscillator port, the interference leakage signal between the transmitting and receiving channels is close to a zero-frequency changing DC signal, achieved through this method of using the transmitted signal from the mixed received signal. For this type of DC signal interference leakage signal, low-cost and simple-to-implement related technologies can be used to achieve anti-interference processing, thereby improving the feasibility of the solution and facilitating practical applications. Secondly, compared to the use of composite baseband circuits to generate radar pulse signals in existing technologies, this embodiment achieves an equivalent traditional radar architecture under radar detection conditions. The output stage of the downconverter mixer does not require complex processing algorithms such as fast time compression to process the downconverted signal output by the downconverter mixer; the radar detection result calculation can be achieved directly, thus saving computational power. Simultaneously, when designing an analog-to-digital converter (ADC) after the downconverter mixer, the frequency requirement for the ADC is extremely low. This implementation method reduces power consumption, computational load, and device costs, which is beneficial for the practical application of the solution.

[0009] In one possible implementation, the signal transceiver circuit further includes a filter coupled to the output of the down-converter mixer. Specifically, when the first terminal of the second switch is selectively coupled to the output of the up-converter mixer, the filter performs high-pass filtering. When the first terminal of the second switch is selectively coupled to the output of the local oscillator frequency source, the filter performs low-pass filtering. In this embodiment, since the interference leakage signal is approximately a DC signal, its removal is relatively simple and can be achieved through filtering. The filter is a filter with both high-pass and low-pass filtering switching functions. In wireless communication scenarios, the filter needs to have low-pass filtering functionality to remove background noise and other noise from the received signal. In radar detection scenarios, the filter needs to have high-pass filtering functionality to remove interference leakage signals. The filter enables rapid removal of interference leakage signals. Compared to the non-DC interference leakage signals generated in existing technologies, this solution allows for easier implementation of anti-interference design with low cost, low power consumption, and low design complexity, which is beneficial for practical application.

[0010] In one possible implementation, the signal transceiver circuit further includes a DC leakage removal circuit coupled to the output of the downconverter mixer. The DC leakage removal circuit is used to: when the first terminal of the second switch is selectively coupled to the output of the upconverter mixer, provide a canceling DC signal to the output of the downconverter mixer. This canceling DC signal is used to remove interference leakage signals, which are DC signals transmitted from the upconverter mixer to the downconverter mixer.

[0011] Exemplarily, the signal transceiver circuit further includes an adder and a second digital-to-analog converter (DAC). The output of the second DAC is coupled to the output of the down-converter mixer via the adder. The second DAC outputs a DC signal with the opposite level and the same voltage amplitude as the interference leakage signal. Exemplarily, the signal transceiver circuit also includes a subtractor and a second DAC. The output of the second DAC is coupled to the output of the down-converter mixer via the subtractor. The second DAC outputs a DC signal with the same level and the same voltage amplitude as the interference leakage signal.

[0012] In this embodiment, besides using the aforementioned filter to remove interference leakage signals, a DC leakage removal circuit can also be employed to eliminate the interference leakage signals. The DC leakage removal circuit generates a DC signal with the same voltage amplitude as the interference leakage signal through a second digital-to-analog converter. The interference leakage signal is then canceled out by adding or subtracting the DC signal from it. Compared to the non-DC interference leakage signals generated in existing technologies, this solution allows for easier implementation of anti-interference design with low cost, low power consumption, and low design complexity, which is beneficial for practical application.

[0013] In one possible implementation, the signal transceiver circuit further includes an analog-to-digital converter (ADC) and a first digital-to-analog converter (DAC), with the input of the ADC coupled to the output of the down-conversion mixer. In embodiments of this application, the ADC and the first DAC, along with the mixer and other devices, can be integrated into a single integrated circuit or chip.

[0014] In one possible implementation, the signal transceiver circuit further includes a data processing circuit. The data processing circuit is coupled to the input terminal of the first digital-to-analog converter (DAC), the output terminal of the DAC, the controlled terminal of the first switch, and the controlled terminal of the second switch, respectively. The data processing circuit is used to: provide a baseband service transmission signal in digital signal form to the input terminal of the first DAC; output a first control signal to the controlled terminals of the first and second switches; and acquire a digital service signal corresponding to the radio frequency service reception signal from the output terminal of the DAC. The first control signal is used to control the first terminal of the first switch to be selectively coupled to the output terminal of the first DAC, and to control the first terminal of the second switch to be selectively coupled to the output terminal of the local oscillator frequency source. Alternatively, it outputs a second control signal to the controlled terminals of the first and second switches, acquires a radar detection signal in digital signal form from the output terminal of the DAC, and controls the first terminal of the first switch to be selectively coupled to the output terminal of the radar waveform generator, and to control the first terminal of the second switch to be selectively coupled to the output terminal of the up-conversion mixer. In this embodiment, the data processing circuit has baseband data processing functions for wireless communication, data detection and analysis functions for radar detection, and switching control functions for operating modes. Data processing circuits and mixers can be integrated into a single integrated circuit or chip structure.

[0015] In one possible implementation, the signal transceiver circuit further includes a data processing circuit and a third switch. The data processing circuit includes a baseband processing circuit and a controller. The first terminal of the third switch is coupled to the output terminal of the analog-to-digital converter, and the second terminal of the third switch is selected and coupled to the baseband processing circuit and the controller. The controller is also coupled to the baseband processing circuit, the second terminal of the first switch, and the first terminal of the third switch, respectively. The controller is used to: output a mode indication signal to the baseband processing circuit based on the signals from the second terminal of the first switch and the first terminal of the third switch. The mode indication signal is used to indicate the operating mode of the signal transceiver circuit. In this embodiment, two separate processing devices can be used to perform the baseband data processing function for wireless communication and the detection structure analysis function for radar detection, respectively. The baseband processing circuit performs wireless service transceiver analysis, and the controller performs radar detection detection structure analysis. Simultaneously, the controller can also detect the signals at the second terminal of the first switch and the first terminal of the third switch, and determine whether to switch the operating mode based on the detection results. When the controller determines that it needs to switch the working mode, in this embodiment, the controller can output a mode indication signal to the baseband processing circuit, and the baseband processing circuit outputs a control signal based on the mode indication signal to control the switching state of the switch, thereby realizing the switching of the working mode.

[0016] In some examples, during wireless communication operation, the baseband processing circuit is configured to: provide a baseband service transmission signal in digital form to the input of the first digital-to-analog converter according to the mode indication signal; output a first control signal to the controlled terminals of the first switch, the second switch, and the third switch; the first control signal is configured to control the first terminal of the first switch to be selectively coupled to the output of the first digital-to-analog converter, control the first terminal of the second switch to be selectively coupled to the output of the local oscillator frequency source, and control the second terminal of the third switch to be selectively coupled to the baseband processing circuit; the controller is further configured to: acquire the digital service signal corresponding to the radio frequency service reception signal from the output of the analog-to-digital converter.

[0017] In some examples, during radar detection operation, the baseband processing circuit is used to: output a second control signal to the controlled terminals of the first switch, the second switch, and the third switch according to the mode indication signal; acquire the radar detection signal in digital form from the output of the analog-to-digital converter; control the first terminal of the second switch to be selectively coupled to the output of the up-conversion mixer; and control the second terminal of the third switch to be selectively coupled to the controller. The second control signal is used to control the first terminal of the first switch to be selectively coupled to the output of the radar waveform generator. The controller is also used to: acquire the digital echo signal corresponding to the echo signal of the radar detection signal from the output of the analog-to-digital converter.

[0018] This application provides a specific control interaction scheme for switching between different working modes, which is beneficial for the specific application and implementation of the scheme.

[0019] In one possible implementation, the signal transceiver circuit is used to: transmit a first radio frequency (RF) service transmission signal to a routing device, the first RF service transmission signal carrying first handshake frame information, the first handshake frame information containing a key field, the key field being used to trigger the signal transceiver circuit to enable wireless communication functionality; and receive the first RF service transmission signal from the routing device, the first RF service transmission signal carrying second handshake frame information, the second handshake frame information containing the device identifier of the routing device. In this embodiment, a scheme is provided for protocol handshake authentication and interaction between the signal transceiver circuit and the routing device to establish a communication connection between the signal transceiver circuit and the routing device, and to complete the interaction of the key field and device identifier required for subsequent interactive functions.

[0020] In one possible implementation, when the signal transceiver circuit continuously transmits radar detection signals, the signal transceiver circuit is further configured to: in response to receiving a second radio frequency service reception signal from the routing device, switch to transmitting radio frequency service transmission signals and radar detection signals at time intervals, wherein the second radio frequency service reception signal contains a key field and a device identifier. In this embodiment, when the signal transceiver circuit is in the radar detection working state, if it receives a second radio frequency service reception signal sent by the routing device, in response to the key field and device identifier on the second radio frequency service reception signal, authentication is completed, and the signal transceiver circuit can switch to a state of communicating with the routing device, for example, switching to transmitting radio frequency service transmission signals and radar detection signals at time intervals, thereby enabling wireless communication interaction while maintaining radar detection. This embodiment provides a feasible scheme for the switching and scheduling interaction of working states when wireless communication and radar detection functions are integrated, facilitating the practical application of the scheme.

[0021] In one possible implementation, the key field includes a first key field and a second key field. When the signal transceiver circuit continuously transmits radar detection signals, it is further configured to: in response to receiving a third radio frequency service reception signal from the routing device, switch to time-division multiplexing (TDM) transmission of radio frequency service signals and radar detection signals, wherein the third radio frequency service reception signal carries the first key field and a device identifier; or, in response to receiving a third radio frequency service reception signal from the routing device, switch to continuous transmission of radio frequency service signals, wherein the third radio frequency service reception signal carries the second key field and a device identifier. In this embodiment, different key fields can be set according to different wireless communication requirements to trigger the signal transceiver circuit to switch to different communication states. In the state of time-division multiplexing of radio frequency service transmission signals and radar detection signals, the signal transceiver circuit maintains the radar detection state while also having wireless communication functionality, but the amount of wireless communication data is relatively small in this scheme. In the state of continuous transmission of radio frequency service signals, the signal transceiver circuit can achieve higher communication interaction capabilities and stronger resistance to communication interference. This solution is designed to adapt to more complex application scenarios, thereby improving its practical applicability.

[0022] In one possible implementation, when the signal transceiver circuit continuously transmits radar detection signals, it is also used to: receive a fourth radio frequency (RF) service received signal, which is missing at least one of a key field or a device identifier, or has an incorrect key field or an incorrect device identifier. The signal transceiver circuit switches to intermittent transmission of RF service signals and radar detection signals, or switches to continuous transmission of RF service signals, to communicate with the routing device. In this embodiment, the actual operating state of the signal transceiver circuit may encounter some security attacks, such as receiving simulated key fields or device identifiers. Therefore, when a fourth RF service received signal containing at least one of an incorrect key field or an incorrect device identifier is received, or when a fourth RF service received signal missing at least one of a key field or a device identifier is received, it indicates that a security attack is present. For the operational security of IoT devices, the continuous radar communication state can be switched to a time-interval transmission of RF service signals and radar detection signals. In this state, the power consumption is slightly higher than that of the extremely low-power continuous radar communication mode. By establishing communication with the routing device, the operational security of the device can be greatly improved. Alternatively, the continuous radar communication state can be switched to continuous transmission of radio frequency service signals, maintaining continuous communication with the routing equipment to greatly ensure operational security. This solution can be adapted to more complex scenarios with stringent security requirements, significantly improving its feasibility.

[0023] In one possible implementation, when the signal transceiver circuit intermittently transmits radio frequency (RF) service signals and radar detection signals, or when it continuously transmits RF service signals, the signal transceiver circuit is further configured to: switch to continuously transmitting radar detection signals if no RF service reception signal is received within a preset time period. In this embodiment, when the signal transceiver circuit does not perform wireless communication for a period of time, it can switch to a continuous radar detection mode, in which the circuit's power consumption remains extremely low. This embodiment can reduce the power consumption of the solution, which is beneficial for its practical application.

[0024] Secondly, embodiments of this application also provide a signal transceiver method, which is applied to an electronic device, the electronic device including a signal transceiver circuit. The signal transceiver circuit is used to: transmit radar detection signals or radio frequency (RF) service transmission signals, receive echo signals from radar detection signals, and receive RF service reception signals. The signal transceiver method includes: transmitting a first RF service transmission signal to a routing device via the signal transceiver circuit; the first RF service transmission signal carrying first handshake frame information, the first handshake frame information having a key field, the key field being used to trigger the electronic device to enable wireless communication; and receiving the first RF service transmission signal from the routing device; the first RF service transmission signal carrying second handshake frame information, the second handshake frame information having a device identifier of the routing device.

[0025] In one possible implementation, when the signal transceiver circuit continuously transmits radar detection signals, the signal transceiver method further includes: in response to receiving a second radio frequency service reception signal from the routing device, the signal transceiver circuit switches to transmitting radio frequency service transmission signals and radar detection signals at time intervals, wherein the second radio frequency service reception signal has a key field and a device identifier.

[0026] In one possible implementation, the key field includes a first key field and a second key field. When the signal transceiver circuit continuously transmits radar detection signals, the signal transceiver method further includes: in response to receiving a third radio frequency service reception signal from the routing device, the signal transceiver circuit switches to time-division multiplexing (TDM) transmission of radio frequency service transmission signals and radar detection signals, wherein the third radio frequency service reception signal carries the first key field and a device identifier; or, in response to receiving a third radio frequency service reception signal from the routing device, the signal transceiver circuit switches to continuous transmission of radio frequency service transmission signals, wherein the third radio frequency service reception signal carries the second key field and a device identifier.

[0027] In one possible implementation, when the signal transceiver circuit continuously transmits radar detection signals, the signal transceiver method further includes: receiving a fourth radio frequency service received signal, wherein the fourth radio frequency service received signal is missing at least one of a key field or a device identifier, or the fourth radio frequency service received signal has at least one of an incorrect key field or an incorrect device identifier; the signal transceiver circuit switches to intermittently transmitting radio frequency service transmitted signals and radar detection signals, or switches to continuously transmitting radio frequency service transmitted signals to communicate with the routing device.

[0028] In one possible implementation, when the signal transceiver circuit transmits radio frequency service transmission signals and radar detection signals at intervals, or when it continuously transmits radio frequency service transmission signals, the signal transceiver method further includes: when no radio frequency service reception signal is received within a preset time period, the signal transceiver circuit switches to continuously transmitting radar detection signals.

[0029] Thirdly, embodiments of this application also provide a signal transceiver method. This method is applied to a routing device, which transmits radio frequency (RF) service reception signals to or receives RF service transmission signals from an electronic device, the electronic device having radar detection capabilities. The signal transceiver method includes: receiving a first RF service transmission signal from the electronic device, the first RF service transmission signal carrying first handshake frame information, the first handshake frame information having a key field, the key field being used to trigger the electronic device to enable wireless communication; and transmitting the first RF service transmission signal to the electronic device, the first RF service transmission signal carrying second handshake frame information, the second handshake frame information having a device identifier of the routing device.

[0030] In one possible implementation, the signal transmission and reception method further includes: transmitting a second radio frequency service reception signal to an electronic device, the second radio frequency service reception signal having a key field and a device identifier, the second radio frequency service reception signal being used to instruct the electronic device to transmit radio frequency service transmission signals to the routing device at time intervals.

[0031] In one possible implementation, the key field includes a first key field and a second key field. The signal transmission and reception method further includes: transmitting a third radio frequency service reception signal to an electronic device; when the third radio frequency service reception signal carries the first key field and a device identifier, the third radio frequency service reception signal is used to instruct the electronic device to transmit radio frequency service transmission signals to the routing device at time intervals; when the third radio frequency service reception signal carries the second key field and a device identifier, the third radio frequency service reception signal is used to instruct the electronic device to continuously transmit radio frequency service transmission signals to the routing device.

[0032] Fourthly, embodiments of this application also provide an electronic device, which includes a circuit board and a signal transceiver circuit as described in the first aspect above.

[0033] Fifthly, embodiments of this application also provide a networking system, which includes a routing device and at least one electronic device. The electronic device is used to perform the signal transmission and reception method as described in the second aspect above, and the routing device is used to perform the signal transmission and reception method as described in the third aspect above.

[0034] In a sixth aspect, embodiments of this application also provide a computer-readable storage medium including instructions that, when executed on a processor, cause the processor to perform the signal transmission and reception method as described in the second aspect above, or to perform the signal transmission and reception method as described in the third aspect above.

[0035] The beneficial effects of the technical principles in the second, third, fourth, fifth, and sixth aspects mentioned above can be found in the relevant description in the first aspect above, and will not be repeated here. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0037] Figure 2 A schematic diagram of a signal transceiver circuit for radar detection is provided in an embodiment of this application;

[0038] Figure 3 This application provides a schematic diagram of the structure of a first signal transceiver circuit for integrated radar detection and wireless communication, as an embodiment of the present application.

[0039] Figure 4 A schematic diagram of the structure of a second signal transceiver circuit provided in an embodiment of this application. Figure 1 ;

[0040] Figure 5 An embodiment of this application is provided as follows: Figure 4 The diagram shows the application of the second signal transceiver circuit under different operating conditions.

[0041] Figure 6 A schematic diagram of the structure of a second signal transceiver circuit provided in an embodiment of this application. Figure 2 ;

[0042] Figure 7 A schematic diagram of the structure of a second signal transceiver circuit provided in an embodiment of this application. Figure 3 ;

[0043] Figure 8 A schematic diagram of the structure of a second signal transceiver circuit provided in an embodiment of this application. Figure 4 ;

[0044] Figure 9 A schematic diagram of the structure of a second signal transceiver circuit provided in an embodiment of this application. Figure 5 ;

[0045] Figure 10 A schematic diagram of the structure of a second signal transceiver circuit provided in an embodiment of this application. Figure 6 ;

[0046] Figure 11 An embodiment of this application is provided as follows: Figure 10 The diagram shows the application of the second signal transceiver circuit under different operating conditions.

[0047] Figure 12 A schematic diagram of a second signal transceiver circuit structure provided in an embodiment of this application. Figure 7 ;

[0048] Figure 13 A schematic diagram illustrating the application of a second signal transceiver circuit for a multiplexed loop correction channel under different operating states, as provided in an embodiment of this application.

[0049] Figure 14 A schematic diagram of a networking system provided in an embodiment of this application;

[0050] Figure 15 A flowchart illustrating a signal transceiver method applied to a signal transceiver circuit, provided in an embodiment of this application. Figure 1 ;

[0051] Figure 16 A flowchart illustrating a signal transceiver method applied to a signal transceiver circuit, provided in an embodiment of this application. Figure 2 ;

[0052] Figure 17 A schematic diagram illustrating the transmission of radar detection signals and radio frequency service transmission signals under different operating modes based on time-division multiplexing and the same frequency, provided for an embodiment of this application;

[0053] Figure 18 A flowchart illustrating a signal transmission and reception method for a routing device provided in this application embodiment. Figure 1 ;

[0054] Figure 19 A flowchart illustrating a signal transmission and reception method for a routing device provided in this application embodiment. Figure 2 . Detailed Implementation

[0055] It should be noted that the terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0056] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0057] The terms "coupling" and "connection" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0058] Microwave-based radar detection technology is widely used in various IoT electronic devices. In IoT electronic devices, such as... Figure 1 As shown, the electronic device 10000 includes a signal transceiver circuit 1000 and an antenna module ANT. The signal transceiver circuit 1000 is designed in the form of an integrated circuit or chip to achieve the purpose of integration and miniaturization of the electronic device. The signal transceiver circuit 1000 is used to realize radar detection. For example, the electronic device 10000 can be a camera with target detection function and a smart door lock, etc.

[0059] Figure 2 An exemplary schematic diagram of a signal transceiver circuit 1000 applied in the field of radar detection is provided. The signal transceiver circuit 1000 includes a radar signal source 100, a first splitter 200, a coupler 300, an isolator 400, a second splitter 500, an I-channel mixer 610, a Q-channel mixer 620, an I-channel amplifier 710, a Q-channel amplifier 720, an analog-to-digital converter 800, and a data processor 900.

[0060] exist Figure 2In the illustrated embodiment, a radar pulse signal is generated by a radar signal source 100. A first splitter 200 splits the radar pulse signal into two paths. One path serves as a radar detection signal and is transmitted through an isolator 400 to an antenna module ANT, which then transmits the radar detection signal towards the target area. The antenna module ANT also receives echo signals reflected from objects in the target area. The antenna module ANT transmits the echo signals to a second splitter 500, which splits the echo signals into two paths. These two echo signals serve as the local oscillator signals for the I-channel mixer 610 and the Q-channel mixer 620, respectively. The first splitter 200 transmits the other split radar pulse signal to a coupler 300, which splits the received radar pulse signal into two orthogonal radar pulse signals with a 90° phase difference and outputs them to the I-channel mixer 610 and the Q-channel mixer 620. I-channel mixer 610 and Q-channel mixer 620 perform frequency mixing processing on the received radar pulse signal based on the local oscillator signal, and output the resulting mixed signal to the corresponding I-channel amplifier 710 and Q-channel amplifier 720. After the I-channel amplifier 710 and Q-channel amplifier 720 amplify the input mixed signal, the analog-to-digital converter 800 performs analog-to-digital conversion processing on the amplified mixed signal to obtain a digital signal. Data processor 900 analyzes the digital signal mixed signal to obtain the detection result of the object in the target area. Furthermore, data processor 900 can also output the detection result, for example, by transmitting the detection result to a display device, audio device, or alarm processing device.

[0061] With the increasing intelligence of IoT-based electronic devices (10000), their demand for wireless communication capabilities is also growing. For example, electronic devices (10000) need to use wireless communication to receive control and scheduling data from centrally managed devices, or to transmit operational data to these devices. However, almost all current radar detection signal transceiver circuits (1000) do not integrate wireless communication functionality. To meet the wireless communication requirements of electronic devices (10000), additional wireless communication components are typically required, which significantly increases hardware costs, power consumption, and area requirements.

[0062] To achieve the integrated wireless communication function and radar detection power within an integrated circuit or chip-based signal transceiver circuit 1000, a related technology proposes a first signal transceiver circuit 1000A, such as... Figure 3As shown, the first signal transceiver circuit 1000A includes a composite baseband circuit 100A, a digital-to-analog converter 200A, an up-conversion mixer 300A, a splitter 400A, a frequency source 500A, a down-conversion mixer 600A, a first analog-to-digital converter 710A, a second analog-to-digital converter 720A, a first mode switch M1, and a second mode switch M2.

[0063] exist Figure 3 In the illustrated embodiment, the transmit processing module within the composite baseband circuit 100A can output a transmit signal in digital form required for radar detection and wireless communication to the digital-to-analog converter 200A. The digital-to-analog converter 200A performs digital-to-analog conversion on the transmit signal in digital form to obtain a transmit signal in analog form. The frequency source 500A can provide a local oscillator signal to the local oscillator port of the upconversion mixer 300A. The upconversion mixer 300A performs upconversion mixing processing on the transmit signal in analog form based on the local oscillator signal to obtain a mixed signal after upconversion mixing. The splitter 400A divides the upconversion mixed signal after upconversion mixing into two paths. One upconversion mixed signal is transmitted through the antenna module ANT. The transmitted upconversion mixed signal can be used as a radar detection signal or a radio frequency service transmit signal carrying service information. The splitter 400A also transmits the other upconversion mixed signal to the first mode switching switch M1. The input of the downconverter mixer 600A also receives radio frequency service reception signals transmitted by other communication devices through the antenna module ANT, or receives echo signals of radar detection signals through the antenna module ANT.

[0064] When the downconversion mixer 600A receives the echo signal of the radar detection signal from the antenna module ANT, the upconversion mixed signal at this time serves as the radar detection signal. The first mode switch M1 can select to receive the transmitted upconversion mixed signal and transmit the received upconversion mixed signal to the local oscillator port of the downconversion mixer 600A. The downconversion mixer 600A performs downconversion mixing processing on the echo signal based on the received upconversion mixed signal to obtain the radar detection downconversion mixed signal in analog signal form. The second mode switch M2 connects the output terminal of the downconversion mixer 600A and the input terminal of the first analog-to-digital converter 710A. The first analog-to-digital converter 710A performs analog-to-digital conversion on the radar detection downconversion mixed signal in analog signal form to obtain the radar detection downconversion mixed signal in digital signal form. The radar data processing module within the composite baseband circuit 100A analyzes the radar detection down-conversion mixed signal in digital form transmitted by the first analog-to-digital converter 710A to obtain the detection status of objects in the target area.

[0065] When the downconversion mixer 600A receives RF service received signals transmitted by other communication devices from the antenna module ANT, the upconversion mixed signal at this time serves as the RF service transmitted signal. The first mode switch M1 can be coupled to the frequency source 500A to obtain the local oscillator signal from the frequency source 500A and transmit it to the local oscillator port of the downconversion mixer 600A. The downconversion mixer 600 performs downconversion mixing processing on the echo signal based on the received local oscillator signal to obtain the communication service downconversion mixed signal in analog signal form. The second mode switch M2 turns on the output terminal of the downconversion mixer 600 and the input terminal of the second analog-to-digital converter 720A. The second analog-to-digital converter 720A performs analog-to-digital conversion on the communication service downconversion mixed signal in analog signal form to obtain the communication service downconversion mixed signal in digital signal form. The communication service receiving module within the composite baseband circuit 100A analyzes the down-conversion mixing signal of the communication service in digital signal form transmitted by the second analog-to-digital converter 720A to obtain the service information transmitted from other communication devices.

[0066] However, although based on Figure 3 The improved architecture shown can achieve the integration of wireless communication and radar detection by reusing the signal transceiver circuit architecture of wireless communication. However, this improved architecture does not optimize the intermediate frequency and digital parts. Its radar detection and wireless communication functions suffer from slow response speed, high power consumption, and poor compatibility. Furthermore, as a communication method, it lacks design for practical application scenarios such as related protocols, channel control, and operating condition control. For example, it does not explain how to switch between radar detection and wireless communication functions on the reused architecture. In summary, this improvement method only remains at the theoretical conceptual level, providing a theoretical design from analog to radio frequency, lacking practicality in both hardware structure and software design, making it difficult to apply in practice.

[0067] To address the aforementioned issues and enhance the practicality of integrated signal transceiver circuits that combine radar detection and wireless communication functions, thereby achieving the goal of practical application, this application also provides a second signal transceiver circuit, such as... Figure 4As shown, the second signal transceiver circuit 1000B includes a radar waveform generator 100B, a local oscillator frequency source 200B, an up-conversion mixer 300B, and a first switch S1. The first terminal of the first switch S1 is used for selective coupling with either the output terminal of the radar waveform generator 100B or the output terminal of the first digital-to-analog converter DAC1. The output terminal of the first digital-to-analog converter DAC1 is used to provide a baseband service transmission signal in analog signal form. The second terminal of the first switch S1 is coupled to the input terminal of the up-conversion mixer 300B. The local oscillator port of the up-conversion mixer 300B is coupled to the output terminal of the local oscillator frequency source 200B. Specifically, when the first terminal of the first switch S1 is selectively coupled with the output terminal of the radar waveform generator 100B, the output terminal of the up-conversion mixer 300B is used to output a radar detection signal. When the first terminal of the first switch S1 is selectively coupled with the output terminal of the first digital-to-analog converter DAC1, the output terminal of the up-conversion mixer 300B is used to output a radio frequency service transmission signal. Figure 4 In this embodiment, the first digital-to-analog converter DAC1 is integrated outside the second signal transceiver circuit 1000B as an example, although it is not in... Figure 4 The illustration is shown in the figure, but in some other examples, the first digital-to-analog converter DAC1 can also be integrated into the second signal transceiver circuit 1000B.

[0068] In this application, Figure 4 In the illustrated embodiment, the intermediate frequency (IF) and digital sections of the architecture are optimized. By designing a first switch S1, the first switch S1 can select and couple a first digital-to-analog converter (DAC1) to receive the baseband service transmission signal in analog form output from the DAC1. This analog baseband service transmission signal is then transmitted to an up-conversion mixer 300B for up-conversion mixing, resulting in a mixed signal used as the radio frequency (RF) service transmission signal for wireless communication. Alternatively, the first switch S1 can also select and couple a radar waveform generator 100B to receive the radar pulse signal output from the radar waveform generator 100B. This radar pulse signal is then transmitted to the up-conversion mixer 300B for up-conversion mixing, resulting in a mixed signal used as the radar detection signal. Compared to... Figure 3 The illustrated embodiment employs a composite baseband circuit 100A to provide the radar pulse signal required for radar detection and the baseband service transmission signal required for wireless communication. Under the application architecture of this application, it has the following advantages: When the second signal transceiver circuit 1000B is in radar detection mode, the radar pulse signal generated by the radar waveform generator 100B and directly up-converted by the up-converter mixer 300B can generate the sensing waveform required for radar detection. Figure 4The proposed solution uses a radar waveform generator 100B combined with an upconversion mixer 300B, which can significantly reduce power consumption in radar detection mode to meet the power consumption design requirements of practical applications and is beneficial to the practical application of the solution.

[0069] In some possible implementations, such as Figure 5 As shown, the second signal transceiver circuit 1000B also includes a down-conversion mixer 400B and a second switch S2. The first terminal of the second switch S2 is used for selective coupling with the output terminal of the local oscillator frequency source 200B or the output terminal of the up-conversion mixer 300B, and the second terminal of the second switch S2 is coupled to the local oscillator port of the down-conversion mixer 400B. Specifically, when the first terminal of the first switch S1 is selectively coupled to the output terminal of the radar waveform generator 100B, the first terminal of the second switch S2 is selectively coupled to the output terminal of the up-conversion mixer 300B, and the input terminal of the down-conversion mixer 400B receives the echo signal of the radar detection signal. When the first terminal of the first switch S1 is selectively coupled to the output terminal of the first digital-to-analog converter DAC1, the first terminal of the second switch S2 is selectively coupled to the output terminal of the local oscillator frequency source 200B, and the input terminal of the down-conversion mixer 400B receives the radio frequency service received signal.

[0070] In this application, Figure 5 Figures (a) and (b) illustrate an example of how the second signal transceiver circuit 1000B switches between radar detection mode and wireless communication mode via a first switch S1 and a second switch S2.

[0071] like Figure 5 As shown in Figure (a), when the first switch S1 connects the output of the first digital-to-analog converter DAC1 to the input of the upconversion mixer 300B, and the second switch S2 connects the output of the local oscillator frequency source 200B to the local oscillator port of the downconversion mixer 400B, the second signal transceiver circuit 1000B is in wireless communication mode. The upconversion mixer 300B obtains the baseband service transmission signal from the output of the first digital-to-analog converter DAC1, and upconverts and mixes the local oscillator signal to obtain the radio frequency service transmission signal. This radio frequency service transmission signal is then transmitted to the target communication device via the antenna module ANT. Simultaneously, the downconversion mixer 400B can receive the radio frequency service reception signal transmitted by the target communication device via the antenna module ANT, and downconverts and mixes the radio frequency service reception signal based on the local oscillator signal provided by the local oscillator frequency source 200B to obtain the downconverted signal, which is then used by subsequent data processing devices, such as the baseband processing circuit, for service parsing. Based on the above method, the second signal transceiver circuit 1000B can complete the wireless communication service transmission and reception function.

[0072] like Figure 5As shown in (b), when the first switch S1 connects the output of the radar waveform generator 100B to the input of the upconversion mixer 300B, and the second switch S2 connects the output of the upconversion mixer 300B to the local oscillator port of the downconversion mixer 400B, the second signal transceiver circuit 1000B is in radar detection mode. The radar detection signal output by the upconversion mixer 300B is transmitted to the local oscillator port of the downconversion mixer 400B through the second switch S2. The downconversion mixer 400B receives the echo signal of the transmitted radar detection signal through the antenna module ANT. This implementation method has the following advantages: Advantage 1: By downconverting and mixing the echo signal based on the radar detection signal obtained from the local oscillator port, the interference leakage signal between the transmitting channel and the receiving channel is close to a zero-frequency changing DC signal. For this type of DC signal interference leakage signal, low-cost and simple-to-implement related technologies can be used to implement anti-interference processing, thereby improving the feasibility of the solution and facilitating practical applications. Advantage two: Compared to... Figure 3 The embodiment in the text uses a composite baseband circuit 100A to generate radar pulse signals. Figure 4 and Figure 5 In the embodiments, Figure 5 Figure (b) shows the equivalent traditional radar architecture. In this way, the output stage of the downconverter mixer 400B does not need to use complex processing algorithms such as fast time compression to process the downconverter mixer signal output by the downconverter mixer 400B. The radar detection result calculation can be realized, which can save more computing power.

[0073] For example, a splitter can be designed at the output of the upconversion mixer 300B. The output of the upconversion mixer 300B is coupled to the antenna module ANT and the first terminal of the second switch S2 respectively through the splitter.

[0074] In some possible implementations, in order to Figure 5 To remove DC interference leakage signals in the radar detection operating mode shown in Figure (b), the following exemplary methods can be used:

[0075] Example 1: Figure 6 As shown, the second signal transceiver circuit 1000B also includes a first filter 510B, which is coupled to the output of the down-conversion mixer 400B. When the first terminal of the second switch S2 is selectively coupled to the output of the up-conversion mixer 300B, the filter performs high-pass filtering. When the first terminal of the second switch S2 is selectively coupled to the output of the local oscillator frequency source 200B, the first filter 510B performs low-pass filtering.

[0076] exist Figure 6 In the illustrated embodiment, since the interference leakage signal is approximately a DC signal, its removal is relatively simple and can be achieved through filtering. The first filter 510B is a filter with both high-pass and low-pass filtering switching functions. In wireless communication scenarios, the first filter 510B needs to have a low-pass filtering function to filter out background noise and other noise in the received signal. In radar detection scenarios, the first filter 510B needs to have a high-pass filtering function to filter out interference leakage signals.

[0077] Example 2: Figure 6 As shown, the second signal transceiver circuit 1000B also includes a DC leakage removal circuit 600B. The DC leakage removal circuit 600B is coupled to the output terminal of the downconverter mixer 400B. The DC leakage removal circuit 600B is used to provide a canceling DC signal to the output terminal of the downconverter mixer 400B when the first terminal of the second switch S2 is selectively coupled to the output terminal of the upconverter mixer 300B. The canceling DC signal is used to remove interference leakage signals, which are DC signals transmitted from the upconverter mixer 300B to the downconverter mixer 400B.

[0078] In this application, Figure 6 In the embodiment shown, since the interference leakage signal is a DC signal, a DC cancellation signal can be generated by the DC leakage removal circuit 600B, and the interference leakage signal can be removed based on the cancellation DC signal.

[0079] In one example, such as Figure 7 As shown, the DC leakage removal circuit 600B includes an adder 610B and a second digital-to-analog converter (DAC2). The output of the second DAC2 is coupled to the output of the down-converter mixer 400B through the adder 610B. The second DAC2 is used to output a DC signal, which has the opposite level and the same voltage amplitude as the interference signal. Figure 7 In one embodiment, an adder 610B can be used to add a DC signal with the opposite level and the same voltage amplitude as the interference leakage signal to achieve cancellation. For example, a -1V DC signal and a +1V interference leakage signal have opposite levels and the same voltage amplitude, and the two can be added together to cancel each other out.

[0080] In one example, the DC leakage removal circuit 600B includes a subtractor and a second digital-to-analog converter (DAC2). The output of the second DAC2 is coupled to the output of the downconverter mixer 400B via the subtractor. The second DAC2 outputs a DC signal with the same level and voltage amplitude as the interference leakage signal. Although not illustrated in the accompanying drawings, the subtractor scheme can be referenced in the relevant drawings of the adder 610B described above. In this embodiment, the subtractor 620B can be used to subtract the DC signal with the same level and voltage amplitude as the interference leakage signal to achieve cancellation. For example, a 1V DC signal and a +1V interference leakage signal have the same level and voltage amplitude, and their subtraction can cancel each other out.

[0081] The above Figure 6 The solutions in Examples 1 and 2 of the illustrated embodiments can be used individually to remove interference leakage signals, or they can be combined to achieve the removal of interference leakage signals. In addition, interference leakage signals can be removed by other means, such as by setting up isolation devices.

[0082] In some possible implementations, the first digital-to-analog converter DAC1 illustrated in the above embodiments can also be integrated into the second signal transceiver circuit 1000B. In this case, such as Figure 8 As shown, the second signal transceiver circuit 1000B also includes an analog-to-digital converter (ADC) 700B and a first digital-to-analog converter (DAC) 1. The input terminal of the ADC 700B is coupled to the output terminal of the down-conversion mixer 400B. The ADC 700B converts the analog signal output from the down-conversion mixer 400B into a digital signal. This down-conversion signal can be either a signal obtained from the echo signal or a signal obtained from the received radio frequency (RF) service signal. The digital signal format of the down-conversion signal facilitates subsequent digital processing, such as analyzing radar detection results, analyzing wireless communication service information, or determining the switching control of operating modes. In this application... Figure 8 In the illustrated embodiment, the wireless communication mode and the radar detection mode can reuse the same intermediate frequency architecture, such as the upconversion mixer 300B, the downconversion mixer 400B, and the analog-to-digital converter 700B, which can reduce the cost and power consumption of the devices.

[0083] In some possible implementations, such as Figure 9As shown, the second signal transceiver circuit 1000B also includes a data processing circuit 800B. The data processing circuit 800B is coupled to the input terminal of the first digital-to-analog converter DAC1, the output terminal of the analog-to-digital converter 700B, the controlled terminal of the first switch S1, and the controlled terminal of the second switch S2, respectively. The data processing circuit 800B is used to: provide a baseband service transmission signal in digital form to the input terminal of the first digital-to-analog converter DAC1 in wireless communication mode; output a first control signal to the controlled terminal of the first switch S1 and the controlled terminal of the second switch S2; and obtain the digital service signal corresponding to the radio frequency service reception signal from the output terminal of the analog-to-digital converter 700B. The first control signal is used to control the first terminal of the first switch S1 to be selectively coupled to the output terminal of the first digital-to-analog converter DAC1, and to control the first terminal of the second switch S2 to be selectively coupled to the output terminal of the local oscillator frequency source 200B. Alternatively, in the radar detection operating mode, a second control signal is output to the controlled terminal of the first switch S1 and the controlled terminal of the second switch S2 to obtain a radar detection signal in digital form from the output terminal of the analog-to-digital converter 700B. The second control signal is used to control the first terminal of the first switch S1 to be selectively coupled with the output terminal of the radar waveform generator 100B, and to control the first terminal of the second switch S2 to be selectively coupled with the output terminal of the up-conversion mixer 300B.

[0084] For example, in this embodiment, the first control signal only indicates that each switch can be turned on to enable the second signal transceiver circuit 1000B to operate in a wireless communication state. The level of the first control signal received by different switches may be the same or different, and this application does not limit this. Similarly, in this embodiment, the second control signal only indicates that each switch can be turned on to enable the second signal transceiver circuit 1000B to operate in a radar detection state. The level of the first control signal received by different switches may be the same or different, and this application does not limit this.

[0085] In this application, Figure 9 In the illustrated embodiment, a data processing circuit 800B may be used. This data processing circuit 800B integrates the wireless service parsing and processing function of baseband data processing, the detection result parsing function of radar detection, and the function of controlling the conduction state of the first switch S1 and the second switch S2 to switch the working mode.

[0086] In some possible implementations, such as Figure 10As shown, the second signal transceiver circuit 1000B also includes a data processing circuit 800B and a third switch S3. The data processing circuit 800B includes a baseband processing circuit 810B and a controller 820B. The first terminal of the third switch S3 is coupled to the output terminal of the analog-to-digital converter 700B, and the second terminal of the third switch S3 is selected and coupled to the baseband processing circuit 810B and the controller 820B. The controller 820B is also coupled to the baseband processing circuit 810B, the second terminal of the first switch S1, and the first terminal of the third switch S3, respectively. The controller 820B is used to output a mode indication signal to the baseband processing circuit 810B based on the signals from the second terminal of the first switch S1 and the first terminal of the third switch S3. The mode indication signal is used to indicate the operating mode of the second signal transceiver circuit 1000B. Figure 10 In the illustrated embodiment, the data processing circuit 800B may include a separately configured baseband processing circuit 810B and a controller 820B. The controller 820B is connected to the second terminal of the first switch S1 and the first terminal of the third switch S3, respectively. By detecting the transmission signals at these two points, the communication status of the second signal transceiver circuit 1000B can be detected, and the need to switch between different operating modes can be determined based on the detection results. In this embodiment, the controller 820B determines the subsequent operating mode of the second signal transceiver circuit 1000B based on the signal output by the analog-to-digital converter 700B, and outputs a mode indication signal to the baseband processing circuit 810B. The baseband processing circuit 810B then outputs a corresponding control signal to adjust the operating mode of the second signal transceiver circuit 1000B based on the mode indication signal.

[0087] For example, when wireless communication is required, such as Figure 11 As shown in Figure (a), the baseband processing circuit 810B is used to: provide a baseband service transmission signal in digital form to the input terminal of the first digital-to-analog converter DAC1 according to the mode indication signal, and output a first control signal to the controlled terminal of the first switch S1, the controlled terminal of the second switch S2 and the controlled terminal of the third switch S3. The first control signal is used to control the first terminal of the first switch S1 to be selectively coupled with the output terminal of the first digital-to-analog converter DAC1, control the first terminal of the second switch S2 to be selectively coupled with the output terminal of the local oscillator frequency source 200B, and control the second terminal of the third switch S3 to be selectively coupled with the baseband processing circuit 810B. The controller 820B is also used to: obtain the digital service signal corresponding to the radio frequency service reception signal from the output terminal of the analog-to-digital converter 700B.

[0088] For example, when it is necessary to be in a radar detection operating state, such as Figure 11As shown in Figure (b), the baseband processing circuit 810B is used to: output a second control signal to the controlled terminals of the first switch S1, the second switch S2, and the third switch S3 according to the mode indication signal; acquire the radar detection signal in digital form from the output terminal of the analog-to-digital converter 700B; control the first terminal of the second switch S2 to be selectively coupled with the output terminal of the up-conversion mixer 300B; and control the second terminal of the third switch S3 to be selectively coupled with the controller 820B. The second control signal is used to control the first terminal of the first switch S1 to be selectively coupled with the output terminal of the radar waveform generator 100B; control the first terminal of the second switch S2 to be selectively coupled with the output terminal of the up-conversion mixer 300B; and control the second terminal of the third switch S3 to be selectively coupled with the controller 820B. The controller 820B is also used to: acquire the digital echo signal corresponding to the echo signal of the radar detection signal from the output terminal of the analog-to-digital converter 700B.

[0089] In this application, Figure 11 In the illustrated embodiment, the controller 820B, under certain device selections, typically has a limited number of control signal output ports, which may result in insufficient control signals to control too many switches. Therefore, the controller 820B can determine whether to switch operating modes, and then output a mode indication signal to instruct the baseband processing circuit 810B. The baseband processing circuit 810B has more signal output ports, and it outputs control signals to adjust the selection coupling state of switches such as the first switch S1, the second switch S2, and the third switch S3, thereby switching the operating mode of the second signal transceiver circuit 1000B.

[0090] Compared to Figure 3 The embodiments shown in this application are as follows: Figure 10 and Figure 11 The embodiments provide a specific implementation scheme for switching between the wireless communication operating mode and the radar detection operating mode, improving the feasibility of the scheme in practical applications and facilitating its practical application. Furthermore, although not described in the above figures and embodiment text, in other implementation scenarios, if the controller 820B has a sufficient number of control signal output ports, the controller 820B can also directly output corresponding control signals to multiple switches based on the signals at the second terminal of the first switch S1 and the first terminal of the third switch S3 to complete the switching of the operating mode.

[0091] In some possible implementations, such as Figure 12As shown, the second signal transceiver circuit 1000B may also include other signal processing devices. In some examples, a second filter 520B may be provided between the second terminal of the first switch S1 and the input terminal of the upconverter mixer 300B. The second filter 520B is a low-pass filter used to perform low-pass filtering on the signal input to the upconverter mixer 300 to filter out some low-frequency interference noise. In some examples, a power amplifier 910B may be provided between the output terminal of the upconverter mixer 300B and the antenna module ANT. The power amplifier 910B is used to power the signal output by the upconverter mixer 300B to increase the power of the transmitted radar detection signal or radio frequency service transmission signal, thereby improving the radar detection effect or wireless communication quality. In some examples, a low-noise power amplifier 920B can also be set between the input of the antenna module ANT and the downconverter mixer 400B. The low-noise power amplifier 920B can amplify the power of the echo signal or RF service received signal input to the antenna module ANT to improve the subsequent signal processing effect.

[0092] In some possible implementations, such as Figure 13 As shown, the second signal transceiver circuit 1000B also includes a fourth switch S4, a loop calibration channel C, and an impedance element Z, wherein the impedance element Z is grounded. The first terminal of the second switch S2 can be multiplexed with the loop calibration channel C to achieve selective coupling with the upconverter mixer 300B. Typically, in wireless communication signal transceiver circuits, a loop calibration channel C is designed, connecting the transmitting side and the receiving side, for example, as... Figure 13 As shown, the loop calibration channel C is connected between the output of the upconverter mixer 300B and the input of the downconverter mixer 400B. The loop calibration channel C can be used to detect information such as the communication channel quality and phase offset between the transmit and receive paths. In this embodiment, the existing loop calibration channel C in a conventional integrated device can be reused to select and transmit the mixing signal output from the upconverter mixer 300B to the local oscillator port of the downconverter mixer 400B.

[0093] like Figure 13 As shown in Figure (a), when the second signal transceiver circuit 1000B is in wireless communication operation and requires calibration, the first terminal of the second switch S2 is selected by the local oscillator frequency source 200B to transmit the local oscillator signal to the down-conversion mixer 400B for mixing the RF service received signal input to the down-conversion mixer 400B. The fourth switch S4 is connected to the loop calibration channel C, so that a small portion of the RF service transmitted signal from the up-conversion mixer 300B is separated and transmitted to the output of the down-conversion mixer 400B for related detection and calibration.

[0094] like Figure 13 As shown in Figure (b), when the second transceiver circuit 1000B is in wireless communication operation and does not require calibration, the first terminal of the second switch S2 is selected by the local oscillator frequency source 200B to transmit the local oscillator signal to the down-conversion mixer 400B for mixing the RF service received signal input to the down-conversion mixer 400B. The fourth switch S4 can disconnect the conduction connection with the loop correction channel C. For example, the fourth switch S4 can be connected to some impedance element Z, the impedance of which matches the system transmission impedance of the second transceiver circuit 1000B, to avoid the disconnection of the fourth switch S4 causing a change in the system transmission impedance.

[0095] And such Figure 13 As shown in Figure (c), when the second signal transceiver circuit 1000B is in radar detection operation, the first terminal of the second switch S2 is selectively coupled to the input terminal of the upconversion mixer 300B through the loop correction channel C, so as to split a portion of the radar detection signal output by the upconversion mixer 300B to the downconversion mixer 400B for mixing with the echo signal. The fourth switch S4 can disconnect the conduction connection with the loop correction channel C and switch to selective connection to the impedance element Z.

[0096] Through this application, as Figure 13 In the illustrated embodiment, under radar detection mode, the existing loop correction channel C in the signal transceiver circuit can be reused to transmit the radar detection signal to the local oscillator port of the downconverter mixer 400B. In wireless mode, the loop correction channel C can also perform related communication quality detection functions. This approach reduces the design complexity of integrated devices, lowers design costs and area overhead, thereby improving the practical applicability of the solution.

[0097] In some possible implementations, the product form of the second transceiver circuit 1000B may include one or more integrated chips. In one example, all components of the second transceiver circuit 1000B may be integrated into a single chip. In one example, a data processing chip and an RF integrated chip may be designed on the circuit board of the second transceiver circuit 1000B. For example, the data processing circuit 800B in the above embodiments may be designed as a data processing chip, and other components besides the data processing circuit 800B may be integrated into an RF integrated chip. In one example, two control chips and an RF integrated chip may be designed on the circuit board of the second transceiver circuit 1000B. For example, the baseband processing circuit 810B in the above embodiments may be designed as a baseband control chip, the controller 820B in the above embodiments may be designed as a control chip, and other components besides the data processing circuit 800B may be integrated into an RF integrated chip. In some examples, at least one of the first digital-to-analog converter DAC1, the second digital-to-analog converter DAC2, and the analog-to-digital converter 700B can be integrated into the chip corresponding to the data processing circuit 800B, or into the chip containing the upconversion mixer 300B and the downconversion mixer 400B.

[0098] For example, the second signal transceiver circuit 1000B can be a microwave sensing device or a radar sensing switch device, etc.

[0099] In some possible implementations, the radar waveform generator 100B and the local oscillator frequency source 200B can be two separate circuits integrated on the same chip or on different chips. Alternatively, the radar waveform generator 100B and the local oscillator frequency source 200B can also be designed as a single integrated circuit device.

[0100] In some possible implementations, although not described in the above figures and text, devices such as the downconverter mixer 400B can also be devices that process two orthogonally, one I-path and one Q-path.

[0101] This application also provides a networking system, such as... Figure 14 As shown, the networking system X includes a routing device 2000B and at least one electronic device 10000B. The electronic device 10000B includes a circuit board and a second signal transceiver circuit 1000B as described in the above embodiments. In some examples, the routing device 20000B may be a device with central control and scheduling functions for controlling and scheduling the electronic device 10000B, or for interacting with the electronic device 10000B to exchange relevant data information.

[0102] This application also provides a signal transceiver method, which can be applied to a signal transceiver circuit that integrates radar detection and wireless communication functions, as well as to an electronic device including the transceiver circuit. For example, it can be applied to the aforementioned... Figure 3 The first signal transceiver circuit 1000A shown is as follows: Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 The second signal transceiver circuit 1000B shown and as follows Figure 14 The electronic device 10000B shown includes a second signal transceiver circuit 1000B. The signal transceiver method may include, for example... Figure 15 The operation shown includes the following steps S100A-S200A:

[0103] S100A transmits the first radio frequency service transmission signal to routing device 20000B.

[0104] In some possible implementations, the first radio frequency service transmission signal carries first handshake frame information, and the first handshake frame information has a key field, which is used to trigger the second signal transceiver circuit 1000B to enable the wireless communication function.

[0105] For example, taking the transmission of a first radio frequency service transmission signal to a routing device 20000B via a second signal transceiver circuit 1000B as an example, the data processing circuit 800B or the baseband processing circuit 810B outputs a digital signal carrying the first handshake frame information. The first digital-to-analog converter DAC1 converts this digital signal into an analog signal carrying the first handshake frame information. The local oscillator port of the upconversion mixer 300B obtains the local oscillator signal from the local oscillator frequency source 200B, and upconverts and mixes the analog signal input to the upconversion mixer 300B into a first radio frequency service transmission signal carrying the first handshake frame information. This first radio frequency service transmission signal is then transmitted to the routing device 20000B via the antenna module ANT.

[0106] For example, after transmitting the first radio frequency service transmission signal to the routing device 20000B, the second signal transceiver device 1000B can also receive the relevant radio frequency service reception signal fed back by the routing device 20000B to realize the handshake protocol operation.

[0107] For example, depending on the actual application protocol, the second signal transceiver circuit 1000B can perform one or more handshake protocol operations with the routing device 20000B. Each handshake protocol operation can be the same or different.

[0108] For example, depending on the handshake protocol operation, in addition to exchanging key fields with the routing device 20000B, the second signal transceiver circuit 1000B can also exchange and agree on the signal frequencies of the radio frequency service transmission signals and radio frequency service reception signals for communication between the two parties.

[0109] S200A receives the first radio frequency service reception signal from the routing device 20000B.

[0110] In some possible implementations, the first radio frequency service transmission signal carries second handshake frame information, and the second handshake frame information contains the device identifier of routing device 20000B.

[0111] In this embodiment of the application, after step S100A completes the handshake interaction regarding information such as the key field and signal frequency, the routing device 20000B can send a device identifier, etc., to the second signal transceiver circuit 1000B for subsequent authentication.

[0112] This application is approved as follows Figure 15 The illustrated embodiment enables protocol handshake authentication between electronic device 10000B or an integrated signal transceiver circuit combining wireless communication and radar detection functions and routing device 20000B. Through... Figure 15 The illustrated embodiment provides an interactive protocol and control scheme for an integrated signal transceiver circuit that combines wireless communication and radar detection functions, thereby improving the practical application feasibility of the solution.

[0113] In some possible implementations, the signal transmission and reception method may further include, for example: Figure 16 The following steps are shown in the operation of S300A:

[0114] S300A, switch the operating state of the signal transceiver circuit.

[0115] In some possible implementations, taking the second transceiver circuit 1000B as an example, after the second transceiver circuit 1000B or the electronic device 10000B including the second transceiver circuit 1000B completes the protocol handshake authentication with the routing device 20000B, the second transceiver circuit 1000B can determine whether to switch to other working states based on the current working state and some judgment conditions.

[0116] In some examples, the up-conversion mixer 300B within the second signal transceiver circuit 1000B mixes the local oscillator signal provided by the local oscillator frequency source 200B to obtain a radar detection signal or a radio frequency (RF) service transmission signal. The RF service transmission signal and the radar detection signal can be at the same frequency. The second signal transceiver circuit 1000B can transmit the radar detection signal and the RF service transmission signal in a time-division multiplexing manner at the same frequency. For example, as... Figure 17 The diagram shown is a three-dimensional coordinate graph, in which the three axes represent the power, frequency, and time of the transmitted wireless communication frame or radar detection frame, respectively. Figure 17 Taking the second signal transceiver circuit 1000B as an example, which transmits radar detection signals and radio frequency service transmission signals in different operating modes based on time-division multiplexing and the same frequency, the signal frequencies of the radar detection frame and the wireless communication frame can be the same, but their power can be different. Based on the different modes in which the second signal transceiver circuit 1000B transmits signal frames in different time periods, it can be specifically divided into three different operating states or modes: Mode 1, Mode 2, and Mode 3.

[0117] In Mode 1, the second transceiver circuit 1000B continuously transmits radar detection signals including radar detection frames, so that the second transceiver circuit 1000B remains in the radar detection working state.

[0118] In Mode 2, the second transceiver circuit 1000B transmits radar detection signals including radar detection frames and radio frequency service transmission signals including wireless communication frames at intervals, so that the second transceiver circuit 1000B maintains wireless communication function in the radar detection working state.

[0119] In mode three, the second transceiver circuit 1000B continuously transmits radio frequency service transmission signals including wireless communication frames, so that the second transceiver circuit 1000B continuously maintains the wireless communication operation state.

[0120] In some possible implementations, the second signal transceiver circuit 1000B can switch its operating state in different modes. Several switching schemes are illustrated below:

[0121] Example 1: The second signal transceiver circuit 1000B can switch to mode 2 or mode 3 in mode 1.

[0122] For example, taking the switching of the second transceiver circuit 1000B from mode one to mode two as an example, when the second transceiver circuit 1000B is in mode one, it continuously transmits radar detection signals. At this time, the second transceiver circuit 1000B is also used to: in response to receiving a second radio frequency service reception signal from the routing device 20000B, the second transceiver circuit 1000B switches to mode two. In mode two, the second transceiver circuit 1000B transmits radio frequency service transmission signals and radar detection signals at time intervals. At this time, the second radio frequency service reception signal has a key field and a device identifier. Similarly, the technical principle and beneficial effects of switching from mode one to mode three based on the key field can be found in the relevant description of switching from mode one to mode two.

[0123] For example, taking the second transceiver circuit 1000 switching from mode one to mode two or mode three as an example, the key field includes a first key field and a second key field. When the second transceiver circuit 1000B is in mode one, it continuously transmits radar detection signals. At this time, the second transceiver circuit 1000B is also used to: in response to receiving a third radio frequency service reception signal from the routing device 20000B, switch to time-division multiplexing of radio frequency service transmission signals and radar detection signals, with the third radio frequency service reception signal carrying the first key field and device identifier. Alternatively, in response to receiving a third radio frequency service reception signal from the routing device 20000B, the transceiver circuit switches to continuous transmission of radio frequency service transmission signals, with the third radio frequency service reception signal carrying the second key field and device identifier. In this embodiment, although wireless communication is possible in mode two, the data and content exchanged in mode two are much lower than those in mode three. Therefore, different key fields can be designed to trigger the second signal transceiver circuit 1000B to switch to different communication modes to adapt to different application requirements.

[0124] In some examples, the second key field is a more complex field than the first key field.

[0125] For example, taking the second transceiver circuit 1000B switching from mode one to mode two or mode three as an example, when the second transceiver circuit 1000B is in mode one, it continuously transmits radar detection signals. If the second transceiver circuit 1000B is subjected to attacks, such as receiving an unauthenticated fourth radio frequency service (RF) reception signal, where the RF RF CRUD signal lacks at least one of a key field or device identifier, or has an incorrect key field or device identifier, the second transceiver circuit 1000B can actively switch to wireless communication mode to establish a communication link with the routing device 20000B. At this time, the second transceiver circuit 10000B can switch from mode one to mode two or mode three, that is, switch to intermittently transmitting RF CRUD signals and radar detection signals, or switch to continuously transmitting RF CRUD signals to communicate with the routing device 20000B.

[0126] For example, when the second signal transceiver circuit 1000 switches to mode two or mode three in mode one, it can also switch to mode two or mode three to perform communication interaction if the second signal transceiver circuit 1000 does not detect the target object within a continuous preset time period.

[0127] In the above embodiment of Example 1, with Figure 11Figure (b) illustrates this example. When the second signal transceiver circuit 1000B is in radar detection mode, the controller 820B within the data processing circuit 800B contains a radar sensing and calculation module. The controller 820B obtains the radar detection signal in digital form from the output of the analog-to-digital converter 700B via the third switch S3. The radar sensing and calculation module within the controller 820B performs sensing and calculation on the digital radar detection signal, thereby achieving the identification of the detected object. In this Mode 1 scenario, the controller 820B also includes a signaling detection module. The controller 820B acquires the signal from the first terminal of the third switch S3. By detecting the signal from the first terminal of the third switch S3 through the signaling detection module, if the antenna module ANT receives radio frequency (RF) service reception signals transmitted by other communication devices, such as the second RF service reception signal transmitted by the routing device 20000B, during radar detection operation, the signaling detection module can determine, based on the key field and device identifier carried on the second RF service reception signal, that the second transceiver circuit 1000B needs to complete signal interaction with the routing device 20000B. The second transceiver circuit 1000B can then switch from Mode 1 to Mode 2, i.e., it switches to time-division multiplexing (TDD) transmission of RF service signals and radar detection signals. In Mode 2, the second transceiver circuit 1000B can maintain radar detection while simultaneously engaging in wireless communication interaction with the routing device 20000B. Similarly, the signaling detection module of controller 820B can also parse the first key field, the second key field, and the device identifier from the third radio frequency service received signal, or parse an incorrect analog key field or an incorrect analog device identifier from the fourth radio frequency service received signal, thereby determining that a security attack has occurred. Depending on the judgment, controller 820B can perform corresponding switching operations. For example, controller 820B generates a mode indication signal for baseband processing circuit 810B according to the required switching method. Baseband processing circuit 810B then outputs control signals to control the switching states of first switch S1, second switch S2, third switch S3, and fourth switch S4, thereby achieving the switching of different operating modes or states.

[0128] Example 2: The second signal transceiver circuit 1000B can switch to mode 1 in mode 2 or mode 3. When the second signal transceiver circuit 1000B transmits radio frequency service transmission signals and radar detection signals at intervals, or continuously transmits radio frequency service transmission signals, if no radio frequency service reception signal is received within a preset time period, it means that there is no service communication requirement at present. The second signal transceiver circuit 1000B then switches to mode 1, that is, continuously transmits radar detection signals.

[0129] In this embodiment, setting different switching modes offers the following advantages: Advantage 1: In mode 1, since the interference leakage signal between the up-conversion mixer 300B and the down-conversion mixer 400B is a DC signal, the removal of this interference leakage signal is relatively simple and requires lower power consumption. Furthermore, the power consumption of the radar waveform generator 100B in generating the radar pulse signal is also significantly lower than... Figure 3 The embodiment generates radar pulse signals with low power consumption. Advantage 2: In Mode 1, the radar waveform generator 100B generates radar pulse signals. Under the equivalent structure of this traditional radar architecture, there is no need to use algorithms such as fast time compression, resulting in extremely low computational power requirements and extremely low frequency requirements for the analog-to-digital converter 700B. This significantly reduces operating power consumption and the computational complexity of radar detection result calculation. Advantage 3: In Mode 2, while slightly increasing power consumption and computational overhead compared to Mode 1, it improves the security of the radar detection process. Advantage 4: In Mode 5, the high-performance communication capabilities of the second signal transceiver circuit 1000B can be retained to meet the communication needs of large data volumes and higher security. Advantage 5: When switching between different operating modes, this solution uses the controller 820B for signaling detection, enabling extremely fast response switching to meet the needs of complex real-world application scenarios.

[0130] In some implementations, different wireless communication protocols can be used to achieve communication depending on the application scenario. For different wireless communication protocols, the key field can be flexibly configured privately. For example, different field positions can be used as key fields, and different encodings or values ​​can be designed as mappings for different modes.

[0131] The above-mentioned different mode settings and switching between different modes are illustrative examples and should not be regarded as limitations on the implementation of this solution. Adaptive adjustments and configurations can be made according to actual applications.

[0132] This application also provides a signal transceiver method, applied to a routing device 20000B, the signal transceiver method including as follows: Figure 18 The following steps S100B-S200B are shown:

[0133] S100B receives the first radio frequency service transmission signal from electronic device 10000B.

[0134] For example, after receiving the first radio frequency service transmission signal, the routing device 20000B can save the first handshake frame information carried on it, such as the key field and signal frequency agreed on the first handshake frame information.

[0135] S200B transmits the first radio frequency service reception signal to electronic device 10000B.

[0136] In some possible implementations, the signal transmission and reception method further includes, for example: Figure 19 The operation of step S300B shown is as follows:

[0137] S300B transmits radio frequency service reception signals carrying key fields and device identifiers to electronic device 10000B.

[0138] For example, when the routing device 2000B needs to communicate wirelessly with the electronic device 10000B, it can transmit a radio frequency service transmission signal carrying a key field and a device identifier to the electronic device 10000B. For example, a second radio frequency service transmission signal carrying a key field and a device identifier, or a third radio frequency service transmission signal carrying a first key field and a device identifier, or a third radio frequency service transmission signal carrying a second key field and a device identifier.

[0139] about Figure 18 and Figure 19 The technical principles and beneficial effects of the signal transmission and reception method described in the illustrated embodiments can be found in the above description. Figure 15 , Figure 16 and Figure 17 The relevant descriptions of the embodiments shown will not be repeated here.

[0140] This application also provides a computer-readable storage medium, which includes instructions that, when executed on a processor, cause the processor to perform the above-described actions. Figure 15 and Figure 16 The signal transmission and reception method described in the illustrated embodiment, or, as follows: Figure 18 and Figure 19 The signal transmission and reception method described in the illustrated embodiment.

[0141] The processor involved in the embodiments of this application can be a chip. For example, it can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0142] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0143] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0144] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0145] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or modules may be electrical, mechanical, or other forms.

[0146] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located on one device or distributed across multiple devices. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0147] In addition, the functional modules in the various embodiments of this application can be integrated into one device, or each module can exist physically separately, or two or more modules can be integrated into one device.

[0148] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

[0149] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A signal transceiver circuit, characterized in that, The system includes a radar waveform generator, a local oscillator frequency source, an up-conversion mixer, and a first switch. A first terminal of the first switch is used for gating and coupling with either the output terminal of the radar waveform generator or the output terminal of a first digital-to-analog converter (DAC). The output terminal of the DAC is used to provide a baseband service transmission signal in analog signal form. A second terminal of the first switch is coupled to the input terminal of the up-conversion mixer. The local oscillator port of the up-conversion mixer is coupled to the output terminal of the local oscillator frequency source. When the first terminal of the first switch is selectively coupled to the output terminal of the radar waveform generator, the output terminal of the upconversion mixer is used to output the radar detection signal. When the first terminal of the first switch is selectively coupled to the output terminal of the first digital-to-analog converter, the output terminal of the upconversion mixer is used to output radio frequency service transmission signals.

2. The signal transceiver circuit according to claim 1, characterized in that, The signal transceiver circuit further includes a down-conversion mixer and a second switch. The first terminal of the second switch is used for selective coupling with the output terminal of the local oscillator frequency source or the output terminal of the up-conversion mixer. The second terminal of the second switch is coupled to the local oscillator port of the down-conversion mixer. When the first terminal of the first switch is selectively coupled to the output terminal of the radar waveform generator, the first terminal of the second switch is selectively coupled to the output terminal of the upconversion mixer, and the input terminal of the downconversion mixer receives the echo signal of the radar detection signal. When the first terminal of the first switch is selectively coupled to the output terminal of the first digital-to-analog converter, the first terminal of the second switch is selectively coupled to the output terminal of the local oscillator frequency source, and the input terminal of the downconverter mixer receives the radio frequency service signal.

3. The signal transceiver circuit according to claim 2, characterized in that, The signal transceiver circuit further includes a filter, which is coupled to the output of the down-converter mixer. When the first terminal of the second switch is selectively coupled to the output terminal of the upconverter mixer, the filter is used for high-pass filtering; When the first terminal of the second switch is selectively coupled to the output terminal of the local oscillator frequency source, the filter is used for low-pass filtering.

4. The signal transceiver circuit according to claim 2 or 3, characterized in that, The signal transceiver circuit further includes a DC leakage removal circuit, which is coupled to the output terminal of the down-converter mixer. The DC leakage removal circuit is used to: provide a cancellation DC signal to the output of the downconverter when the first terminal of the second switch is selectively coupled to the output terminal of the upconverter mixer. The cancellation DC signal is used to remove interference leakage signals, which are DC signals transmitted from the upconverter mixer to the downconverter mixer.

5. The signal transceiver circuit according to claim 4, characterized in that, The signal transceiver circuit further includes an adder and a second digital-to-analog converter (DAC). The output of the second DAC is coupled to the output of the down-conversion mixer via the adder. The second DAC outputs a DC signal, which has the opposite level and the same voltage amplitude as the interference leakage signal. The signal transceiver circuit further includes a subtractor and a second digital-to-analog converter. The output of the second digital-to-analog converter is coupled to the output of the down-conversion mixer through the subtractor. The second digital-to-analog converter is used to output a DC signal, which has the same level and voltage amplitude as the interference leakage signal.

6. The signal transceiver circuit according to any one of claims 2-5, characterized in that, The signal transceiver circuit further includes an analog-to-digital converter and the first digital-to-analog converter, wherein the input terminal of the analog-to-digital converter is coupled to the output terminal of the down-conversion mixer.

7. The signal transceiver circuit according to claim 6, characterized in that, The signal transceiver circuit further includes a data processing circuit, which is coupled to the input terminal of the first digital-to-analog converter, the output terminal of the analog-to-digital converter, the controlled terminal of the first switch, and the controlled terminal of the second switch, respectively. The data processing circuit is used for: The baseband service transmission signal in digital form is provided to the input terminal of the first digital-to-analog converter (DAC). A first control signal is output to the controlled terminals of the first switch and the second switch. The digital service signal corresponding to the radio frequency service reception signal is obtained from the output terminal of the DAC. The first control signal is used to control the first terminal of the first switch to be selectively coupled to the output terminal of the first DAC, and to control the first terminal of the second switch to be selectively coupled to the output terminal of the local oscillator frequency source; or... A second control signal is output to the controlled terminals of the first switch and the second switch to obtain the radar detection signal in digital form from the output terminal of the analog-to-digital converter. The second control signal is used to control the first terminal of the first switch to be selectively coupled with the output terminal of the radar waveform generator, and to control the first terminal of the second switch to be selectively coupled with the output terminal of the up-conversion mixer.

8. The signal transceiver circuit according to claim 6, characterized in that, The signal transceiver circuit further includes a data processing circuit and a third switch. The data processing circuit includes a baseband processing circuit and a controller. A first terminal of the third switch is coupled to the output terminal of the analog-to-digital converter, and a second terminal of the third switch is selectively coupled to the baseband processing circuit and the controller. The controller is also coupled to the baseband processing circuit, the second terminal of the first switch, and the first terminal of the third switch, respectively. The controller is configured to: output a mode indication signal to the baseband processing circuit based on the signals from the second terminal of the first switch and the first terminal of the third switch, wherein the mode indication signal is used to indicate the operating mode of the signal transceiver circuit.

9. The signal transceiver circuit according to claim 8, characterized in that, In wireless communication operation, the baseband processing circuit is configured to: provide the baseband service transmission signal in digital form to the input terminal of the first digital-to-analog converter according to the mode indication signal; and output a first control signal to the controlled terminals of the first switch, the second switch, and the third switch. The first control signal is used to control the first terminal of the first switch to selectively couple with the output terminal of the first digital-to-analog converter, control the first terminal of the second switch to selectively couple with the output terminal of the local oscillator frequency source, and control the second terminal of the third switch to selectively couple with the baseband processing circuit. The controller is further configured to: acquire the digital service signal corresponding to the radio frequency service received signal from the output terminal of the analog-to-digital converter; or... In the radar detection operating state, the baseband processing circuit is used to: output a second control signal to the controlled terminals of the first switch, the second switch, and the third switch according to the mode indication signal; acquire the radar detection signal in digital form from the output terminal of the analog-to-digital converter; control the first terminal of the second switch to be selectively coupled with the output terminal of the up-conversion mixer; and control the second terminal of the third switch to be selectively coupled with the controller. The second control signal is used to control the first terminal of the first switch to be selectively coupled with the output terminal of the radar waveform generator. The controller is also used to: acquire the digital echo signal corresponding to the echo signal of the radar detection signal from the output terminal of the analog-to-digital converter.

10. The signal transceiver circuit according to any one of claims 2-9, characterized in that, The signal transceiver circuit is used for: A first radio frequency service transmission signal is transmitted to the routing device. The first radio frequency service transmission signal carries first handshake frame information. The first handshake frame information has a key field. The key field is used to trigger the signal transceiver circuit to enable the wireless communication function. The first radio frequency service transmission signal is received from the routing device. The first radio frequency service transmission signal carries second handshake frame information, and the second handshake frame information contains the device identifier of the routing device.

11. The signal transceiver circuit according to claim 10, characterized in that, When the signal transceiver circuit continuously transmits the radar detection signal, the signal transceiver circuit is also used for: In response to receiving a second radio frequency service reception signal from the routing device, the signal transceiver circuit switches to transmit the radio frequency service transmission signal and the radar detection signal at time intervals, wherein the second radio frequency service reception signal contains the key field and the device identifier.

12. The signal transceiver circuit according to claim 10, characterized in that, The key field includes a first key field and a second key field; when the signal transceiver circuit continuously transmits the radar detection signal, the signal transceiver circuit is also used for: In response to receiving a third radio frequency service reception signal from the routing device, the signal transceiver circuit switches to time-division multiplexing to transmit the radio frequency service transmission signal and the radar detection signal, wherein the third radio frequency service reception signal carries the first key field and the device identifier. or, In response to receiving a third radio frequency service receive signal from the routing device, the signal transceiver circuit switches to continuously transmitting the radio frequency service transmit signal, wherein the third radio frequency service receive signal carries the second key field and the device identifier.

13. The signal transceiver circuit according to any one of claims 10-12, characterized in that, When the signal transceiver circuit continuously transmits the radar detection signal, the signal transceiver circuit is also used for: The fourth radio frequency service received signal is missing at least one of the key field or the device identifier, or the fourth radio frequency service received signal has at least one of the incorrect key field or the incorrect device identifier. The signal transceiver circuit switches between intermittently transmitting the radio frequency service transmission signal and the radar detection signal, or continuously transmitting the radio frequency service transmission signal to communicate with the routing device.

14. The signal transceiver circuit according to any one of claims 10-13, characterized in that, When the signal transceiver circuit transmits the radio frequency service transmission signal and the radar detection signal at intervals, or when it continuously transmits the radio frequency service transmission signal, the signal transceiver circuit is further configured to: If the radio frequency service reception signal is not received within a preset time period, the signal transceiver circuit switches to continuously transmitting the radar detection signal.

15. A signal transmission and reception method, characterized in that, The device is applied to an electronic device, which includes a signal transceiver circuit. The signal transceiver circuit is used to: transmit radar detection signals or radio frequency service transmission signals, receive echo signals of the radar detection signals, and receive radio frequency service reception signals. The signal transmission and reception method includes: The first radio frequency service transmission signal is transmitted to the routing device through the signal transceiver circuit. The first radio frequency service transmission signal carries first handshake frame information. The first handshake frame information has a key field. The key field is used to trigger the electronic device to enable the wireless communication function. The first radio frequency service transmission signal is received from the routing device. The first radio frequency service transmission signal carries second handshake frame information, and the second handshake frame information contains the device identifier of the routing device.

16. The signal transmission and reception method according to claim 15, characterized in that, When the signal transceiver circuit continuously transmits the radar detection signal, the signal transceiver method further includes: In response to receiving a second radio frequency service reception signal from the routing device, the signal transceiver circuit switches to transmit the radio frequency service transmission signal and the radar detection signal at time intervals, wherein the second radio frequency service reception signal contains the key field and the device identifier.

17. The signal transmission and reception method according to claim 15, characterized in that, The key field includes a first key field and a second key field; When the signal transceiver circuit continuously transmits the radar detection signal, the signal transceiver method further includes: In response to receiving a third radio frequency service reception signal from the routing device, the signal transceiver circuit switches to time-division multiplexing to transmit the radio frequency service transmission signal and the radar detection signal, wherein the third radio frequency service reception signal carries the first key field and the device identifier. or, In response to receiving a third radio frequency service receive signal from the routing device, the signal transceiver circuit switches to continuously transmitting the radio frequency service transmit signal, wherein the third radio frequency service receive signal carries the second key field and the device identifier.

18. The signal transmission and reception method according to any one of claims 15-17, characterized in that, When the signal transceiver circuit continuously transmits the radar detection signal, the signal transceiver method further includes: The fourth radio frequency service received signal is missing at least one of the key field or the device identifier, or the fourth radio frequency service received signal has at least one of the incorrect key field or the incorrect device identifier. The signal transceiver circuit switches between intermittently transmitting the radio frequency service transmission signal and the radar detection signal, or continuously transmitting the radio frequency service transmission signal to communicate with the routing device.

19. The signal transmission and reception method according to any one of claims 15-18, characterized in that, When the signal transceiver circuit periodically transmits the radio frequency service transmission signal and the radar detection signal, or when it continuously transmits the radio frequency service transmission signal, the signal transceiver method further includes: If the radio frequency service reception signal is not received within a preset time period, the signal transceiver circuit switches to continuously transmitting the radar detection signal.

20. A signal transmission and reception method, characterized in that, The signal transceiver method is applied to a routing device, which is used to transmit radio frequency service reception signals to or receive radio frequency service transmission signals from the electronic device. The electronic device has radar detection capabilities. The signal transceiver method includes: The electronic device receives a first radio frequency service transmission signal, which carries first handshake frame information. The first handshake frame information has a key field, which is used to trigger the electronic device to enable the wireless communication function. A first radio frequency service transmission signal is transmitted to the electronic device. The first radio frequency service transmission signal carries second handshake frame information, and the second handshake frame information contains the device identifier of the routing device.

21. The signal transmission and reception method according to claim 20, characterized in that, The signal transmission and reception method further includes: The electronic device transmits a second radio frequency service receiving signal, which includes the key field and the device identifier. The second radio frequency service receiving signal is used to instruct the electronic device to transmit the radio frequency service transmission signal to the routing device at time intervals.

22. The signal transmission and reception method according to claim 20, characterized in that, The key field includes a first key field and a second key field; the signal transmission and reception method further includes: The third radio frequency service receiving signal is transmitted to the electronic device; when the third radio frequency service receiving signal carries the first key field and the device identifier, the third radio frequency service receiving signal is used to instruct the electronic device to transmit the radio frequency service transmitting signal to the routing device at time intervals; when the third radio frequency service receiving signal carries the second key field and the device identifier, the third radio frequency service receiving signal is used to instruct the electronic device to continuously transmit the radio frequency service transmitting signal to the routing device.

23. An electronic device, characterized in that, Includes a circuit board and a signal transceiver circuit as described in any one of claims 1-14.

24. A networking system, characterized in that, It includes a routing device and at least one electronic device, the electronic device being configured to perform the signal transmission and reception method as described in any one of claims 15-19, and the routing device being configured to perform the signal transmission and reception method as described in any one of claims 20-22.

25. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes instructions that, when executed on a processor, cause the processor to perform the signal transceiver method as described in any one of claims 15-19, or to perform the signal transceiver method as described in any one of claims 20-22.

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