Signal transceiving link and method, integrated circuit, electromagnetic wave device and equipment

Abstract

A signal transmit-receive link and method, an integrated circuit, an electromagnetic wave device and equipment, the signal transmit-receive link comprising: a signal transmit link and a signal receive link wherein the signal transmit link comprises a plurality of transmit channels implemented based on an analog circuit, each transmit channel comprising a respective transmit antenna, the signal transmission delays of the at least two transmitting channels are different, and the plurality of transmitting antennas transmit electromagnetic wave signals in a time division multiplexing mode; the signal receiving link comprises at least one receiving channel, and the receiving channel comprises a signal compensator realized by adopting a digital phase shift architecture; and the signal compensator is configured to determine a transmitting channel corresponding to the currently received echo signal, generate a compensation signal according to the delay difference of the signal transmission delay of the corresponding transmitting channel relative to the reference transmission delay, and compensate the currently received echo signal by using the compensation signal.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to, but are not limited to, the technical field of electromagnetic wave devices, and in particular to a signal transceiver link and method, an integrated circuit, an electromagnetic wave device, and equipment. Background Art

[0002] At present, in order to improve the measurement accuracy, the frequency modulated continuous wave (FMCW) radar system adopts multi-antenna transmission technology. In order to achieve better isolation between the transmitting antennas, it is increasingly difficult to design the same antenna feeder length for different transmitting antennas.

[0003] Unequal length transmit antenna feeders can solve the above antenna design problems. Unequal length transmit antenna feeders can achieve better link budget, simpler antenna design and routing, lower antenna coupling, better target angle resolution performance, smaller modules and costs, etc. However, different transmit antenna feeder lengths will cause different relative delays of RF signals passing through different transmit antennas, which in turn affects the quality of received signals and the accuracy of radar system detection results. Summary of the invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The embodiment of the present disclosure provides a signal transceiver link, including: a signal transmission link and a signal receiving link, wherein: the signal transmission link includes multiple transmission channels implemented based on analog circuits, each of the transmission channels includes its own transmission antenna, at least two of the transmission channels have different signal transmission delays, and the multiple transmission antennas transmit electromagnetic wave signals in a time division multiplexing manner; the signal receiving link includes at least one receiving channel, and the receiving channel includes a signal compensator implemented using a digital phase shift architecture; the signal compensator is configured to determine the transmission channel corresponding to the currently received echo signal, generate a compensation signal according to the delay difference of the signal transmission delay of the corresponding transmission channel relative to a reference transmission delay, and use the compensation signal to compensate the currently received echo signal.

[0006] An embodiment of the present disclosure further provides an integrated circuit, comprising a signal transceiver link as described in any embodiment of the present disclosure, for transceiving electromagnetic wave signals.

[0007] An embodiment of the present disclosure also provides an electromagnetic wave device, comprising: a carrier; an integrated circuit as described in any one of the present disclosure, arranged on the carrier; an antenna, arranged on the carrier, or the antenna and the integrated circuit are integrated into a single device and arranged on the carrier; the antenna comprises a transmitting antenna and a receiving antenna; wherein the integrated circuit is connected to the antenna for transmitting electromagnetic wave signals and / or receiving electromagnetic wave signals.

[0008] An embodiment of the present disclosure also provides a device, comprising: a device body; and an electromagnetic wave device as described in any embodiment of the present disclosure, which is arranged on the device body; wherein the electromagnetic wave device is used for target detection and / or communication to provide reference information for the operation of the device body.

[0009] An embodiment of the present disclosure also provides a signal transceiving method, which is applied to an antenna array of an electromagnetic wave device having at least two signal transmission links, and the signal transceiving method includes: determining a reference transmission delay and a delay difference of the signal transmission delay of each of the transmission channels relative to the reference transmission delay; generating a compensation signal corresponding to each of the transmission channels according to the delay difference; determining the transmission channel corresponding to the currently received echo signal, and using the corresponding compensation signal to compensate for the intermediate frequency phase difference and / or frequency difference of the currently received echo signal.

[0010] The embodiments of the present disclosure also provide a non-transitory computer-readable storage medium on which computer-readable instructions are stored. When the instructions are executed by a processor, the processor executes the signal sending and receiving method as described in any embodiment of the present disclosure.

[0011] The signal transceiver link and method, integrated circuit, electromagnetic wave device and equipment of the embodiments of the present disclosure generate a compensation signal through a signal compensator according to the delay difference of the signal transmission delay of the transmission channel corresponding to the currently received echo signal relative to the reference transmission delay, and use the compensation signal to compensate for the currently received echo signal, thereby improving the quality of the received signal and further improving the detection accuracy and detection range of the radar system.

[0012] Other aspects will become apparent upon reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the contents of the present disclosure.

[0014] Figure 1AA schematic diagram of the structure of a signal transmission link provided for an exemplary embodiment of the present disclosure;

[0015] Figure 1B A schematic diagram of the structure of a signal receiving link provided for an exemplary embodiment of the present disclosure;

[0016] Figure 2A A schematic diagram of an FMCW transmission signal using sawtooth wave modulation;

[0017] Figure 2B It is a signal schematic diagram of two transmitting antennas and four receiving antennas;

[0018] Figure 3A and Figure 3B Schematic diagram of FMCW transmission signals and their echo signals from two different transmitting antennas;

[0019] Figure 4A A schematic diagram of the structure of a receiving channel provided for an exemplary embodiment of the present disclosure;

[0020] Figure 4B A simplified schematic diagram of a signal transmission link of a digital phase shifter architecture in an embodiment of the present disclosure;

[0021] Figure 4C Based on Figure 4B A schematic diagram of a digital phase shifter architecture in a signal transmission link is shown;

[0022] Figure 4D is a schematic diagram of a transmission link including a specific compensation module in an embodiment of the present disclosure;

[0023] Figure 4E It is a schematic diagram of calibrating and compensating a transmission link using an auxiliary receiving circuit in an embodiment of the present disclosure;

[0024] Figure 5 A flowchart of a signal receiving and sending method provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present disclosure more clear, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present disclosure can be combined with each other arbitrarily without conflict.

[0026] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0027] Radar is an electronic device that uses electromagnetic waves to detect targets. The radar chip transmits a beam through a signal transmission link. When the transmitted beam encounters an obstacle, the echo reflected by the obstacle is received by the receiving antenna and transmitted to the radar chip. The radar chip determines the position, distance, speed and other information of the target relative to the electromagnetic wave emission point. With the development of microelectronics and other technologies, radar has gradually been widely used, especially millimeter wave radar (such as automotive radar). Due to its small antenna size, it has been widely used in autonomous driving, smart home devices and industrial automation devices. At present, the miniaturization and integration of radar has become the current development trend.

[0028] Antenna feeder is a device for transmitting, controlling and distributing radio frequency electromagnetic signal energy in radar. Due to the requirements of miniaturization and integration of radar, the layout of antenna feeder has a significant impact on the quality of radar chip sensing signal. At present, the layout of antenna feeder depends on the positional relationship between the transceiver unit and the antenna in the radar chip. In the multi-input multi-output (MIMO) system, there are multiple groups of transceiver antennas. In order to ensure the accuracy of target detection, it is necessary to ensure that the relative delay generated by each transmitting antenna is the same. However, when using the design method of unequal length transmitting antenna feeder, due to the different lengths of each transmitting antenna feeder, the relative delay generated by the RF signal after passing through different transmitting antennas is not the same, which in turn affects the quality of the received signal and the accuracy of the radar system detection results.

[0029] like Figure 1A and 1BAs shown, an embodiment of the present disclosure provides a signal transceiver link, including: a signal transmission link and a signal receiving link, wherein: the signal transmission link includes multiple transmission channels 100 implemented based on analog circuits, each transmission channel 100 includes its own transmission antenna 105, at least two transmission channels 100 have different signal transmission delays, and multiple transmission antennas 105 transmit electromagnetic wave signals in a time division multiplexing manner; the signal receiving link includes at least one receiving channel 200, and the receiving channel 200 includes a signal compensator 201 implemented using a digital phase shift architecture; the signal compensator 201 is configured to determine the transmission channel 100 corresponding to the currently received echo signal, generate a compensation signal according to the delay difference of the signal transmission delay of the corresponding transmission channel 100 relative to the reference transmission delay, and use the compensation signal to compensate the currently received echo signal.

[0030] For example, Figure 1A The signal transmission chain shown includes four transmission channels. Figure 1B The signal receiving link shown includes one receiving channel, however, the embodiment of the present disclosure does not limit this, and the number of transmitting channels and receiving channels can be set as needed (in the embodiment of the present disclosure, as long as the number of transmitting channels is greater than or equal to 2, and the number of receiving channels is greater than or equal to 1). Figure 1A As shown, in the four transmitting channels, the lengths of the transmitting antenna feed lines 10, 11, 12 and 13 are different, and the relative delays generated by the transmitting signals passing through the transmitting antenna feed lines 10, 11, 12 and 13 are also different. In the disclosed embodiment, the signal compensator 201 generates a compensation signal according to the delay difference of the signal transmission delay of the transmitting channel corresponding to the currently received echo signal relative to the reference transmission delay, and uses the compensation signal to compensate for the currently received echo signal, for example, using the compensation signal to compensate for the phase difference and / or intermediate frequency signal frequency difference of the currently received echo signal, so as to improve the quality of the received signal, thereby achieving the purpose of improving the detection accuracy and detection range of the radar system.

[0031] In some exemplary embodiments, Figure 1AAs shown, the signal transmission link also includes a waveform generator 101 and a local oscillator 102 connected in sequence, each transmission channel includes a phase shifter 103, a power amplifier 104 and a transmission antenna 105 connected in sequence, the local oscillator 102 is respectively connected to the phase shifter 103 of each transmission channel 100, and the waveform generator 101 is respectively connected to the phase shifter 103 of each transmission channel, wherein: the waveform generator 101 is configured to generate an initial transmission signal and output it to the local oscillator 102 and the phase shifter 103; the local oscillator 102 is configured to generate an intrinsic signal according to the initial transmission signal and output it to the phase shifter 103; the phase shifter 103 is configured to phase shift the received initial transmission signal and output it to the power amplifier 104; the power amplifier 104 is configured to power amplify the received signal and output the amplified signal to the transmission antenna 105.

[0032] In some exemplary embodiments, Figure 1B As shown, each receiving channel 200 further includes a receiving antenna 205, a first mixer 204, a low-pass filter 203, an analog-to-digital converter 202, etc., which are connected in sequence. The receiving antenna 205, the first mixer 204, the low-pass filter 203, the analog-to-digital converter 202, and the signal compensator 201 are connected in sequence, wherein: the first mixer 204 is configured to multiply the signal received by the receiving antenna with the chirp signal transmitted by the transmitting antenna to obtain a mixed signal and output it to the low-pass filter 203; the low-pass filter 203 is configured to perform low-pass filtering on the received mixed signal to obtain a difference frequency signal and output it to the analog-to-digital converter 202; the analog-to-digital converter 202 is configured to perform analog-to-digital conversion on the received difference frequency signal and output it to the signal compensator 201;

[0033] The signal compensator 201 is used to perform phase difference and / or frequency difference compensation on the intermediate frequency signal output by the IQ analog-to-digital converter.

[0034] like Figure 1A As shown, since each transmission channel uses the same local oscillator 102, the length of the signal line from the local oscillator 102 to the phase shifter 103 of each transmission channel ( Figure 1A There are also differences in 20, 21, 22, and 23), and this difference will also cause different relative delays in different transmission channels.

[0035] In some exemplary embodiments, the signal transmission delays of at least two transmitting channels are different, including: the signal transmission delays generated by the transmitting antenna feed lines of the at least two transmitting channels are different, and / or the signal transmission delays generated by the signal lines from the local oscillator to the phase shifters of the at least two transmitting channels are different.

[0036] In the embodiment of the present disclosure, the signal compensator 201 generates a compensation signal according to the delay difference of the signal transmission delay of the corresponding transmission channel 100 relative to the reference transmission delay, including: the signal compensator 201 generates a compensation signal according to the delay difference of the signal transmission delay generated by the transmission antenna feeder of the corresponding transmission channel 100 relative to the first reference transmission delay, and / or, the delay difference of the signal transmission delay generated by the signal line from the local oscillator 102 to the phase shifter 103 of the corresponding transmission channel 100 relative to the second reference transmission delay. However, the embodiment of the present disclosure is not limited to this, and the signal compensator 201 can also generate a compensation signal according to the signal transmission delay generated at other positions in the corresponding transmission channel 100, thereby solving the problem of different signal transmission delays caused by the length difference of the signal line from the local oscillator 102 to the phase shifter 103 of each transmission channel or the difference at any other position.

[0037] In some exemplary embodiments, when the delay difference of the signal transmission delay of the transmission channel relative to the reference transmission delay includes the delay difference of the signal transmission delay of the transmission antenna feeder of the transmission channel relative to the first reference transmission delay, the first reference transmission delay may be the signal transmission delay generated by the transmission antenna feeder of any one of the multiple transmission channels; when the delay difference of the signal transmission delay of the transmission channel relative to the reference transmission delay includes the delay difference of the signal transmission delay from the local oscillator to the phase shifter relative to the second reference transmission delay, the second reference transmission delay may be the signal transmission delay generated by the signal line from the local oscillator to the phase shifter of any one of the multiple transmission channels. In the embodiment of the present disclosure, the transmission channels corresponding to the first reference transmission delay and the second reference transmission delay may be the same or different.

[0038] In some exemplary embodiments, when the delay difference of the signal transmission delay of a transmitting channel relative to a reference transmission delay includes the delay difference of the signal transmission delay of a transmitting antenna feeder of the transmitting channel relative to a first reference transmission delay, the first reference transmission delay may be the signal transmission delay generated by the shortest transmitting antenna feeder among the multiple transmitting channels; when the delay difference of the signal transmission delay of a transmitting channel relative to the reference transmission delay includes the delay difference of the signal transmission delay from a local oscillator to a phase shifter relative to a second reference transmission delay, the second reference transmission delay may be the signal transmission delay generated by the shortest signal line from the local oscillator to the phase shifters among the multiple transmitting channels.

[0039] Figure 2A FIG. 1 is a schematic diagram of an FMCW transmission signal using sawtooth wave modulation, such as Figure 2A As shown, a sawtooth is usually called a chirp. Figure 2AThe FMCW transmission signal shown is formed by two transmitting antennas in a time division multiplexing (TDM) mode, where TX0 represents the first transmitting antenna, TX1 represents the second transmitting antenna, and so on. It should be noted that the first transmitting antenna TX0 and the second transmitting antenna TX1 described in the present disclosure only represent the logical order of the antennas, and are not required to correspond one to one with the physical order of the antennas. The starting frequency, frequency range, chirp duration, etc. of the chirp signals transmitted by multiple transmitting antennas can be the same or different, as long as the chirp signals transmitted by the multiple transmitting antennas do not overlap in time.

[0040] In some exemplary embodiments, the mathematical expression corresponding to the transmitted signal is as follows:

[0041]

[0042] Where t is time, f c is the starting frequency of a chirp during the frequency sweep process, β is the frequency variation range of a chirp during the frequency sweep process, T is the scanning duration of a chirp during the frequency sweep process, and θ is the initial phase.

[0043] Figure 2B Schematic diagram of signals of two transmitting antennas and four receiving antennas, where RX0 represents the first receiving antenna, RX1 represents the second receiving antenna, RX2 represents the third receiving antenna, and RX3 represents the fourth receiving antenna. Figure 2B It can be seen that each receiving antenna can receive the chirp signals transmitted by all transmitting antennas. Figure 2A Take the signal transmission link including two transmitting antennas as an example. Figure 2B An example is given in which a signal transmission link includes two transmission antennas and a signal reception link includes four reception antennas. However, the embodiments of the present disclosure are not limited thereto.

[0044] Figure 3A and Figure 3B Schematic diagram of FMCW transmission signals and their echo signals of two different transmitting antennas, as shown in Figure 3A and Figure 3B As shown in the figure, due to the different relative delays of the transmission channels corresponding to the two transmitting antennas, △t1>△t0, that is, Figure 3B The relative delay of the transmitting antenna shown is greater than Figure 3A The relative delay of the transmitting antenna shown in the figure causes a difference in the distance frequency of the target detected by the two receiving antennas, △f1>△f0, which in turn affects the final detection result of the radar chip.

[0045] Assume that the signal transmission delay generated by the transmitting antenna feeder of any transmitting channel among the multiple transmitting channels is defined as the first reference delay τ1 , and define the signal transmission delay generated by the signal line from the local oscillator to the phase shifter of any one of the multiple transmission channels as the second reference delay τ 2 , then after the first reference delay τ 1 and the second reference delay τ 2 The FMCW signal can be expressed as follows:

[0046]

[0047] where t≥τ=τ 1 +τ 2 .

[0048] In the embodiment of the present disclosure, the first reference delay τ 1 Defined as the signal transmission delay generated by the shortest transmitting antenna feeder, the second reference delay τ 2 It is defined as the signal transmission delay generated by the shortest signal line from the local oscillator to the phase shifter, however, the embodiments of the present disclosure are not limited to this. In other exemplary embodiments, the signal transmission delay generated by the transmitting antenna feeder of any transmitting channel can also be defined as the first reference delay τ 1 , and the signal transmission delay generated by the signal line from the local oscillator to the phase shifter of the transmitting channel is taken as the second reference delay τ 2 .

[0049] Assume that the signal transmission delay generated by the transmitting antenna feeder of any transmitting channel is relative to the first reference delay τ 1 The additional delay is μ 1 , and the signal transmission delay generated by the signal line from the local oscillator to the phase shifter of the transmitting channel is relative to the second reference delay τ 2 The additional delay is μ 2 , then the FMCW signal passing through the transmission channel can be expressed as follows:

[0050]

[0051] Where t≥τ+μ, μ=μ 1 +μ 2 .

[0052] Through the signal compensator in the receiving channel, we can generate the corresponding compensation signal To compensate for the additional delay of the signal sent by the transmit channel.

[0053] In some exemplary embodiments, Figure 1BAs shown, the receiving channel includes an I-channel receiving channel Y_I and a Q-channel receiving channel Y_Q, the compensation signal includes a cosine compensation signal and a sine compensation signal, the cosine compensation signal and the sine compensation signal have the same frequency, the cosine compensation signal and the sine compensation signal have the same initial phase, one of the cosine compensation signal and the sine compensation signal is used to compensate the intermediate frequency signal of the currently received echo signal and then output it to the I-channel receiving channel Y_I, and the other of the cosine compensation signal and the sine compensation signal is used to compensate the intermediate frequency signal of the currently received echo signal and then output it to the Q-channel receiving channel Y_Q.

[0054] In some exemplary embodiments, the cosine compensation signal may be The sinusoidal compensation signal can be Where n is the digital signal sampling point, f c is the starting frequency of the chirp signal, β is the frequency variation range of the chirp signal, T is the sweep duration of the chirp signal, and μ is the delay difference of the signal transmission delay of the transmitting channel relative to the reference transmission delay.

[0055] In some exemplary embodiments, the delay difference μ of the signal transmission delay of the transmission channel relative to the reference transmission delay includes the delay difference of the signal transmission delay of the transmission antenna feeder of the transmission channel relative to the first reference transmission delay, and / or the delay difference of the signal transmission delay from the local oscillator to the phase shifter relative to the second reference transmission delay. The setting method of the first reference transmission delay and the second reference transmission delay is as described above and will not be repeated here.

[0056] In other exemplary embodiments, Figure 4A As shown, when the signal after analog-to-digital conversion of each receiving channel is a complex signal, the signal output end of the receiving antenna 205 is respectively connected to the first mixer 2041 and the first mixer 2042 (the first mixer 2041 and the first mixer 2042 are collectively referred to as the first IQ mixer), and the signal output ends of the first mixer 2041 and the first mixer 2042 are respectively connected to the low-pass filter 2031 and the low-pass filter 2032 (the low-pass filter 2031 and the low-pass filter 2032 are collectively referred to as the IQ low-pass filter), and the transmission channel coupled output The signal is also connected to the first mixer 2041 and the 90° (π / 2) phase shifter respectively, the other end of the 90° phase shifter is connected to the first mixer 2042, the signal output end of the low-pass filter 2031 is connected to the analog-to-digital converter 2021, the signal output end of the low-pass filter 2032 is connected to the analog-to-digital converter 2022, and the signals output from the signal output ends of the analog-to-digital converter 2021 and the analog-to-digital converter 2022 (the analog-to-digital converter 2021 and the analog-to-digital converter 2022 are collectively referred to as IQ analog-to-digital converters) are respectively connected to the cosine compensation signal The signal obtained by multiplying and summing is output to the Q receiving channel Y_Q, and the signals output from the signal output terminals of the analog-to-digital converter 2021 and the analog-to-digital converter 2022 are respectively combined with the sinusoidal compensation signal The signal obtained after multiplication and summation is output to the I receiving channel Y_I.

[0057] The signal transceiver link of the disclosed embodiment generates a compensation signal through a signal compensator according to the signal transmission delay corresponding to the currently received echo signal, and uses the compensation signal to compensate for the intermediate frequency signal of the corresponding received echo signal, thereby improving the quality of the received signal and further improving the detection accuracy and detection range of the radar system.

[0058] Since the mixer is a very important and key device for frequency conversion in the transceiver link, it is widely used in radio devices such as communications and radars, such as a single-sideband mixer with good suppression effect on image signals, and an IQ mixer in the transceiver link in the embodiment of the present disclosure. Among them, the IQ mixer (such as a single-sideband mixer) includes two branches, an I branch and a Q branch, with a phase difference of 90° to transmit signals.

[0059] For application scenarios with relatively compact layout areas, such as high-frequency sensor applications in the millimeter wave frequency band, the physical distance between the I branch and the Q branch, and between the input branch and the output branch before mixing are short. As a result, electromagnetic wave signals may be leaked between branches, between input and output ports, and between the IQ matching network and the mixer output through methods such as magnetic coupling, substrate coupling, and electrical coupling, which may cause signal leakage problems, thereby causing the image suppression ratio and local oscillator leakage of the mixer to deteriorate seriously.

[0060] In some optional embodiments, Figure 1A The phase shifter 103 in the transmission link can be a phase shifter of analog architecture or a phase shifter of digital phase shift architecture. For example, in the field of FMCW millimeter wave radar, the structure of the phase shifter in the traditional transmission link is generally composed of analog circuits. At the same time, the function of the analog phase shifter can be replaced by a phase shifter of digital architecture, thereby realizing the precise phase shifting operation of each transmission link. The following is an overview of the transceiver link of the digital phase shift architecture:

[0061] Figure 4B This is a simplified schematic diagram of a signal transmission link of a digital phase shifter architecture in an embodiment of the present disclosure. Figure 4C Based on Figure 4B A schematic diagram of a digital phase shifter architecture in a signal transmission link is shown; Figure 4D It is a schematic diagram of a transmission link including a specific compensation module in an embodiment of the present disclosure.

[0062] An embodiment of the present disclosure provides a signal transmission link that can be applied to electromagnetic wave devices. The transmission link may include an analog signal source and a digital phase shifter. The analog signal source may be configured to provide an initial analog signal (such as an LO signal), and the digital phase shifter may be configured to provide a phase-shifted signal generated in a digital domain. The digital phase shifter may also phase-shift the initial analog signal based on the generated phase-shifted signal to perform a preset phase shift operation on the initial analog signal.

[0063] like Figure 4B As shown, in some optional embodiments, a signal transmission link of a digital phase shifter architecture may include an analog signal source 41, a digital phase shifter (Digital PS) 42 and a transmitting antenna 43, that is, the analog signal source 41 may be configured to provide an LO signal, and the digital phase shifter 42 may be configured to perform a preset phase shift operation on the received LO signal, so that the phase-shifted LO signal is radiated to a preset spatial area through the transmitting antenna 43. The analog signal source 41 may also be an architecture including a phase-locked loop PLL, which may provide an electromagnetic wave (such as laser, microwave, millimeter wave, centimeter wave, etc.) signal. The analog signal source 41, the digital phase shifter 42 and the transmitting antenna 43 may be integrated into an integrated device, or may be separate components; for example, the analog signal source 41 and the digital phase shifter 42 may be integrated into a package to form a SoC chip, and the transmitting antenna 43 may be connected through the peripheral port of the chip to form a carrier such as a PCB board. At the same time, in some optional embodiments, the transmitting antenna 43 can also be integrated on the chip package to form AiP or AoP, having a chip structure with a packaged antenna.

[0064] like Figure 4B As shown, the digital phase shifter 42 in the embodiment of the present disclosure may include a mixer (Mixer) 421, a digital-to-analog converter (i.e., DAC) 422 and a phase shift signal source (such as a digital baseband signal source Baseband) 423, etc., that is, the phase shift signal source 423 can be configured to provide a digital phase shift signal; the digital-to-analog converter 422 can be configured to perform analog-to-digital conversion on the received digital phase shift signal to convert the digital phase shift signal into an analog phase shift signal; the mixer 421 can be configured to perform a mixing operation on the received analog phase shift signal with the received electromagnetic wave signal from the analog signal source 41, so as to achieve a phase shift operation of setting the above-mentioned electromagnetic wave signal using the digital phase shift signal. Optionally, when the above-mentioned signal transmission link provides a swept frequency signal, such as providing an FMCW laser signal or an FMCW microwave signal, a swept frequency electromagnetic wave signal can be provided based on the analog signal source 41, and / or a swept frequency digital phase shift signal can be provided based on the phase shift signal source 423, so that after mixing by the mixer 421, a swept frequency continuous wave signal is output.

[0065] In some optional embodiments, based on Figure 4B In the structure shown, the analog signal source 41 can be configured to provide FMCW signals in the centimeter wave band or millimeter wave band (such as 3.1 GHz, 24 GHz, 60 GHz, 77 GHz, etc.) of microwaves, and the phase-shifted signal source 423 can be configured to provide a digital phase-shifted signal at the MHz level (for example, 3 MHz to 5 MHz, such as 3 MHz, 4 MHz, 5 MHz, etc.), that is, the digital-to-analog converter 422 performs digital-to-analog conversion on the digital phase-shifted signal at the MHz level to obtain an analog phase-shifted signal in the corresponding frequency range, and the mixer 421 can be configured to perform up-mixing or down-mixing operations on the received millimeter wave band FMCW signal based on the received analog phase-shifted signal of the fixed frequency band, so as to realize the operation of preset phase shifting of the FMCW signal.

[0066] In some optional embodiments, the centimeter wave signal in the 3.1 GHz frequency band may include 3.1 GHz to 10.6 GHz, for example, 3.1 GHz, 5 GHz, 5 GHz, 6 GHz, 8 GHz, 10.6 GHz, etc.; the millimeter wave signal in the 77 GHz frequency band may include 76 GHz to 81 GHz signals, for example, swept frequency signals such as 76 GHz to 77 GHz, 77 GHz to 79 GHz, 79 GHz to 81 GHz, or fixed frequency band signals such as 76 GHz, 77 GHz, 78 GHz, 79 GHz, 80 GHz, 81 GHz, etc.

[0067] based on Figure 4B In the structure shown, since the phase-shift signal source 423 provides a digital signal, in order to further adapt the signal characteristics, the mixer 421 can be set as an IQ Mixer, and the digital-to-analog converter 422 is an IQ DAC. At the same time, the phase-shift signal source 423 can be configured to provide a digital baseband signal source (DDFS) for phase shifting and / or provide a corresponding source signal as a waveform controller (WaveformControl).

[0068] For example, Figure 4CAs shown, the signal transmission link (TX digital phase shifter architecture) of the digital phase shifter architecture may include a digital baseband signal source (Baseband), a direct digital frequency synthesizer (Direct Digital Frequency Synthesizer, DDFS for short), an IQ digital to analog converter (Digital to Analog Convertor, DAC for short), a low-pass filter (Low-Pass Filter, LPF for short), an IQ modulator (IQ modulator / IQ Mixer), a power amplifier (Power Amplifier, PA), etc., that is, the baseband signal source is configured to provide a digital phase shift source signal, and the direct digital frequency synthesizer may be configured to implement CDM (Code-Division Multiplexing), DDM (Doppler Division Multiplexing), TDM (Time-Division Multiplexing), SDM (Space Division Multiplexing), CSD (Circuit Switch Data), Digital IF (Digital Intermediate Multiplexing) based on the received source signal. Frequency, digital intermediate frequency) and other signal waveforms and wave transmission methods to achieve flexible configuration of signal transmission form and transmission waveform. Among them, the signal amplified by the power amplifier can be radiated to a preset space area through a transmitting antenna packaged as an integral unit or externally.

[0069] With respect to the signal transmission link of the digital phase shifter architecture in the embodiment of the present disclosure, since the digital phase shifter architecture is configured to generate a baseband signal sequence in the digital domain, and can generate an analog baseband signal through a DAC, and then modulate the transmission signal to a high frequency through an orthogonal mixer, that is, because the baseband signal of the architecture is generated in the digital domain, it has better orthogonality and lower sidelobes, and therefore its phase shift phase can be generated very accurately, resulting in higher phase modulation accuracy.

[0070] In some optional embodiments, for the signal transmission link of the digital phase shifter architecture, when the RF LO frequency sweep is used to realize the transmitted signal as an FMCW signal, a compensation module can be added to the signal transmission link to solve the problems of TX IQ imbalance (Imbalance), signal leakage (such as TX LO Leakage) and harmonic distortion (HD) caused by IQ mismatch (Mismatch). Figure 4CAs shown, a compensation module (TX compensation) can be set between the TX DDFS and the IQ DAC to perform calibration and compensation operations on the signal transmission link of the digital phase shifter architecture to achieve an operation to solve at least one of the above problems. Among them, the HD caused by the third-order nonlinearity of the baseband can be referred to as HD3.

[0071] In some optional embodiments, such as Figures 4C to 4D As shown, the compensation module (TX compensation) may include at least one of an LO compensation unit (TX LO leakage compensation), an IQ compensation unit (TX IQ Imbalance compensation) and an HD3 compensation unit (TX HD3 compensation), that is, the LO compensation unit may be configured to perform compensation operations for signal leakage, the IQ compensation unit may be configured to perform compensation operations for IQ imbalance, and the HD3 compensation unit may be configured to perform compensation operations for the above-mentioned HD3. The LO compensation unit is configured to be used to perform compensation operations for at least one of an IQ modulator imbalance (TX IQ Modulator imbalance) and an IQ channel imbalance (IQchannel imbalance). In addition, when the compensation module includes at least two of the LO compensation unit, the IQ compensation unit and the HD3 compensation unit, compensation may be performed synchronously (such as in parallel) or sequentially (such as in series) according to actual needs and signal characteristics. Figure 4D As shown, IQ compensation may be performed first, then LO compensation, and finally HD3 compensation.

[0072] In some optional embodiments, for the signal transmission link of the digital phase shifter architecture, an error correction module (TX DAC Board Error Correction) for DAC and an AWGN (additive white gaussian noise) module for Gaussian white noise may also be included, which are not shown in the figure and may be added or deleted according to actual needs. Among them, I in IQ mentioned in the embodiments of the present disclosure can be expressed as the abbreviation of In-Phase (i.e., in-phase), Q can be expressed as the abbreviation of Quadrature (i.e., orthogonal), and RF can be expressed as the abbreviation of Radio Frequency (i.e., radio frequency).

[0073] In an optional embodiment, the compensation operation for IQ Imbalance can be achieved by compensating the conjugate signal of the BB (baseband) signal to reversely cancel the image component, and this compensation operation method is not affected by the calibration method of IQ Imbalance. The compensation for LO Leakage can be achieved by adjusting the DC component (i.e., DC bias) of the two IQ paths, and the calibration method of LO Leakage has no effect on its compensation scheme. For HD3, since the third-order harmonic distortion of the orthogonal mixer V / IConverter is the main source of HD3, and the harmonic distortion will be affected by the DC bias, when both the LO Leakage and HD3 of the transmission link need to be calibrated, it is necessary to calibrate HD3 after calibrating LO Leakage to ensure the accurate performance of HD3 calibration.

[0074] In addition, the compensation methods of HD3 based on the digital pre-compensation architecture of the digital cubic module and the digital pre-compensation architecture based on the frequency doubling waveform generator module will directly affect the subsequent calibration scheme and subsequent compensation process. Specifically:

[0075] In an optional embodiment, for a digital pre-compensation architecture based on a digital cubic module, LO Leakage may be calibrated and compensated first, and then the root cause of the HD3 problem, i.e., the compensation coefficient of HD3, may be calibrated under a stable DC bias; then, IQ Imbalance may be calibrated, and after IQ Imbalance is further compensated, the third harmonic distortion may be compensated for the two IQ paths based on the results of IQ Imbalance pre-compensation.

[0076] In an optional embodiment, for a digital pre-compensation architecture based on a frequency doubling waveform generator module, after calibrating and compensating for LO Leakage, the compensation coefficient of HD3 can be calibrated, and IQImbalance can be calibrated and IQ Imbalance can be compensated under a stable DC bias; subsequently, the actual waveforms of the IQ and Q signals and the compensation coefficient of HD3 are calculated respectively through the compensation results, and the waveform information of 3x and 5x that need to be pre-compensated is calculated in reverse.

[0077] In another optional embodiment, for the digital pre-compensation architecture based on the frequency-multiplier waveform generator module, LO Leakage can be calibrated and compensated first, and then the pre-compensation coefficients of HD3 and IQ Imbalance can be calibrated simultaneously through multiple (such as three) observations, and then the pre-compensation coefficients at the HD3 mirror position can be calibrated again through observations (such as two times); finally, the 3-fold and 5-fold frequency coefficients that need to be pre-compensated are calculated back through the pre-compensation coefficients at the HD3 and HD3 mirror positions. It should be noted that the observations in the embodiments of the present disclosure are used to represent operations such as testing and comparison and analysis of different test results.

[0078] Figure 4E It is a schematic diagram of using an auxiliary receiving circuit to calibrate and compensate a transmission link in an embodiment of the present disclosure.

[0079] like Figure 4E As shown, the transmitting path (Transmitter) may include a phase shift module PS, an amplifier PA, a power detector PD, etc. For example, the transmitting path may adopt the transmitting link of the digital phase shifter architecture (Digital Phase Shifter) described in any embodiment of the present disclosure. For details, please refer to the relevant figures and text descriptions, which will not be repeated here. Since the transmitting path adopts a digital phase shifter architecture, while achieving more accurate phase shifting operations, the transmitting channel can simultaneously support multiple modes such as DDM and FDM (Frequency Division Multiplexing) of multiple antennas, and can also save the calibration operation of the RF phase shifter (Phase Shifter), reduce the isolation and coupling degree in the phase shifting system, and reduce the link loss and production cost. In addition, in response to the possible problems of TX IQ mismatch (Mismatch) and LO leakage (leakage), the transmitting path of the digital phase shifter architecture can also support RF frequency response (Frequency Response) compensation, IQ imbalance and LO leakage calibration operations in the digital domain.

[0080] For problems such as TX IQ mismatch, LO leakage, and frequency response in the transmission path, the auxiliary receiver (ARX) can be set up to perform relevant calibration and compensation operations. Figure 4EAs shown, the ARX may include a mixer, TIA, LPF, HPF, IQ ADC, adder and RF calibration module (RF Calib) connected in sequence, that is, by receiving the ARX IQ LO signal at one input end of the mixer, the other input end is connected to the node before the transmission path PD along the signal transmission direction (i.e. the direction of the arrow shown in the figure), or any node after the phase shifter (module). For example, it is connected to the output end of the PA (synchronously realizing the calibration of the PA), the input end of the PA, etc., so as to perform calibration operations on the transmission path through the ARX. There is a set difference frequency between the LO signal frequency in the transmission path and the ARX IQ LO signal frequency, so that there is a frequency error between the two signals to simulate a real transceiver signal loop.

[0081] In an optional embodiment, in order to further improve the calibration accuracy, a corresponding calibration circuit (ie, calibration receiving unit) may be provided for the ARX (ie, auxiliary receiving unit), for example Figure 4E The RF single tone signal generating circuit (RF ToneGenerator) shown in the figure may include a TX DDFS, an adder, a Real DAC, an LPF, an amplifier, a multiplier and a band pass filter (BPF) connected in sequence, wherein the adder may be configured to calibrate and compensate for the TX LO leakage (TX LO leakage Waveform), the multiplier may be configured to compensate for the RF Tone Gen LO leakage (leakage), and the BPF may be configured to filter out the DC signal generated by the LO leakage of the RF Tone Generator. That is, the RF Tone Generator may be configured to generate a plurality of stable single tone signals of different frequencies to implement the calibration operation of the ARX.

[0082] In some optional embodiments, such as Figure 4E As shown, the ARX can be calibrated using the RF Tone Generator first, and then the calibrated ARX can be used to calibrate the transmitting channel (Transmitter) including PA, for example, the PD at the PA output, the phase shifter in the transmitting channel, the total gain from DAC to PA output, and the frequency response and other devices and circuits.

[0083] Specifically, Figure 4E As shown, the RF Tone Generator can be used to generate multiple stable single-tone signals with different frequencies to assist in calibrating the ARX, and then the calibrated ARX can be used to assist in calibrating the IQ imbalance, local oscillator leakage, frequency response inconsistency and other issues of the transmission path TX.

[0084] like Figure 5 As shown, the embodiment of the present disclosure further provides a signal transceiving method, which is applied to an antenna array of an electromagnetic wave device having at least two signal transmission links, and the signal transceiving method includes:

[0085] Step 501: Determine a reference transmission delay and a delay difference of a signal transmission delay of each transmission channel relative to the reference transmission delay;

[0086] In some exemplary embodiments, the reference transmit delay includes a first reference transmit delay and / or a second reference transmit delay, wherein the first reference transmit delay may be a signal transmit delay of a transmit antenna feeder of any transmit channel, and the second reference transmit delay may be a signal transmit delay of a signal line from a local oscillator to a phase shifter of any transmit channel.

[0087] In other exemplary embodiments, the reference transmit delay includes a first reference transmit delay and / or a second reference transmit delay, wherein the first reference transmit delay may be a signal transmit delay of the shortest transmit antenna feeder in a plurality of transmit channels, and the second reference transmit delay may be a signal transmit delay of the shortest signal line from a local oscillator to a phase shifter in a plurality of transmit channels.

[0088] In the embodiments of the present disclosure, the distance between the transmitting antenna feed line and / or the signal line from the local oscillator to the phase shifter in each transmitting channel may be measured, and the distance measurement may include model simulation measurement or actual measurement.

[0089] Step 502: Generate a compensation signal corresponding to each transmission channel according to the delay difference;

[0090] In the embodiment of the present disclosure, the frequency control parameter of the compensation signal Phase control parameters Among them, f c is the starting frequency of the chirp signal, β is the frequency variation range of the chirp signal, T is the frequency sweep duration of the chirp signal, and μ is the delay difference of the signal transmission delay of the transmitting channel relative to the reference transmission delay.

[0091] Step 503: determine the transmission channel corresponding to the currently received echo signal, and use the corresponding compensation signal to compensate the currently received echo signal.

[0092] In the embodiment of the present disclosure, the receiving channel includes an I-channel transmitting channel and a Q-channel transmitting channel, and the compensation signal includes a cosine compensation signal and sinusoidal compensation signal The currently received echo signal is compensated using one of the cosine compensation signal and the sine compensation signal and then output to the I-way receiving channel Y_I. The currently received echo signal is compensated using the other of the cosine compensation signal and the sine compensation signal and then output to the Q-way receiving channel Y_Q.

[0093] The signal receiving and transmitting method of the disclosed embodiment generates a compensation signal through a signal compensator according to the signal transmission delay corresponding to the currently received echo signal, and uses the compensation signal to compensate for the currently received echo signal, thereby improving the quality of the received signal and further improving the detection accuracy and detection range of the radar system.

[0094] The embodiment of the present disclosure also provides an integrated circuit, which may include any of the above signal transceiver links for transceiving electromagnetic wave signals. Optionally, the integrated circuit may also include a data processing module, which is used to process digital signals to achieve target detection and / or wireless communication. For example, the integrated circuit may be a millimeter wave radar chip (chip or die).

[0095] In some optional embodiments, the integrated circuit may be an AiP (Antenna-In-Package) chip structure, an AoP (Antenna-On-Package) chip structure, or an AoC (Antenna-On-Chip) chip structure.

[0096] In some optional embodiments, the currently received signal is an echo signal formed by the electromagnetic wave signal emitted by the signal transceiver link being emitted and / or scattered by the target, and the integrated circuit is a sensor chip.

[0097] According to other embodiments of the present disclosure, an electromagnetic wave device is also proposed. The electromagnetic wave device may include an antenna, and an integrated circuit as described above. The integrated circuit is electrically connected to the antenna for receiving and transmitting electromagnetic wave signals. For example, the electromagnetic wave device may include: a carrier, an integrated circuit and an antenna as described in any of the above embodiments, etc., wherein the integrated circuit may be arranged on the carrier; the antenna may be arranged on the carrier, or the integrated device may be integrated with the integrated circuit and arranged on the carrier (that is, the antenna may be an antenna provided in an AiP, AoP or AoC structure at this time); wherein the integrated circuit is connected to the antenna (that is, the sensor chip or the integrated circuit is not integrated with an antenna at this time, such as a conventional SoC, etc.), for receiving and transmitting electromagnetic wave signals. The carrier may be a printed circuit board PCB, and the first transmission line may be a PCB trace.

[0098] An embodiment of the present disclosure provides a device, which may include: a device body; and an electromagnetic wave device as described above, which is arranged on the device body; wherein the electromagnetic wave device is used for target detection and / or communication to provide reference information for the operation of the device body.

[0099] The present disclosure also provides an electronic device, which can be expressed in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: at least one processing unit, at least one storage unit, a bus connecting different system components (including a storage unit and a processing unit), a display unit, etc. Among them, the storage unit stores a program code, and the program code can be executed by the processing unit so that the processing unit executes the method described in this specification according to various exemplary embodiments of the present disclosure. The storage unit may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) and / or a cache memory unit, and may further include a read-only memory unit (ROM).

[0100] The storage unit may also include a program / utility having a set (at least one) of program modules, such program modules including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0101] The bus may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0102] The electronic device may also communicate with one or more external devices (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may communicate with one or more devices that enable a user to interact with the electronic device, and / or may communicate with any device that enables the electronic device to communicate with one or more other computing devices (e.g., routers, modems, etc.). This communication may be performed through an input / output (I / O) interface. In addition, the electronic device may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) through a network adapter. The network adapter may communicate with other modules of the electronic device through a bus. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0103] For example, the electronic device in the embodiment of the present disclosure may also include: a device body; and an electromagnetic wave device as described in any of the above embodiments arranged on the device body; wherein the electromagnetic wave device can be used to realize functions such as target detection and / or wireless communication.

[0104] Specifically, based on the above embodiments, in an optional embodiment of the present disclosure, the electromagnetic wave device can be arranged outside the device body, or arranged inside the device body, and in other optional embodiments of the present disclosure, the electromagnetic wave device can also be arranged partially inside the device body and partially outside the device body. The embodiments of the present disclosure are not limited to this, and the specific situation may be determined.

[0105] In an optional embodiment, the device body can be a component or product used in fields such as smart cities, smart homes, transportation, smart homes, consumer electronics, security monitoring, industrial automation, in-cabin detection (such as smart cockpits), medical devices, and health care. For example, the device body can be intelligent transportation equipment (such as cars, bicycles, motorcycles, ships, subways, trains, etc.), security equipment (such as cameras), liquid level / flow rate detection equipment, smart wearable devices (such as bracelets, glasses, etc.), smart home devices (such as sweeping robots, door locks, televisions, air conditioners, smart lights, etc.), various communication devices (such as mobile phones, tablet computers, etc.), and gates, smart traffic lights, smart signs, traffic cameras, and various industrialized robotic arms (or robots), etc. It can also be various instruments for detecting life characteristic parameters and various devices equipped with the instruments, such as life characteristic detection in car cabins, indoor personnel monitoring, smart medical equipment, consumer electronic equipment, etc.

[0106] The embodiment of the present disclosure also provides a non-transitory computer-readable storage medium having computer-readable instructions stored thereon. When the instructions are executed by a processor, the processor executes the feeder unequal length compensation method as described above.

[0107] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software, or by combining software with necessary hardware. The technical solution according to the implementation methods of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, or a network device, etc.) to execute the above method according to the implementation methods of the present disclosure.

[0108] The software product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0109] Computer readable storage media may include data signals propagated in baseband or as part of a carrier wave, wherein readable program codes are carried. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The readable storage medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program codes contained on the readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination thereof.

[0110] Program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0111] The computer-readable medium carries one or more programs. When the one or more programs are executed by a device, the computer-readable medium implements the aforementioned functions.

[0112] Those skilled in the art will appreciate that the above modules can be distributed in the device according to the description of the embodiment, or can be changed accordingly and only used in one or more devices different from the embodiment. The modules of the above embodiments can be combined into one module, or further divided into multiple sub-modules.

[0113] According to an embodiment of the present disclosure, a computer program is proposed, including a computer program or an instruction, which, when executed by a processor, can execute the method described above. In an optional embodiment, the above-mentioned integrated circuit can be a millimeter wave radar chip. The type of digital function module in the integrated circuit can be determined according to actual needs. For example, in a millimeter wave radar chip, a data processing module can be used for functions such as distance-dimensional Doppler transform, velocity-dimensional Doppler transform, constant false alarm detection, direction of arrival detection, point cloud processing, etc., to obtain information such as the distance, horizontal angle, pitch angle, speed, height, micro-Doppler motion characteristics, shape, size, surface roughness and dielectric properties of the target.

[0114] It should be noted that radio devices can achieve functions such as target detection and / or communication by transmitting and receiving radio signals to provide the device body with detection target information and / or communication information, thereby assisting or even controlling the operation of the device body.

[0115] For example, when the above-mentioned device body is applied to an advanced driver assistance system (i.e., ADAS), the radio device (such as millimeter-wave radar) as a vehicle-mounted sensor can assist the ADAS system to realize application scenarios such as adaptive cruise control, automatic braking assistance (i.e., AEB), blind spot detection warning (i.e., BSD), assisted lane change warning (i.e., LCA), reversing assistance warning (i.e., RCTA), parking assistance, rear vehicle warning, collision avoidance, pedestrian detection, etc.

[0116] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0117] The above-described embodiments only express the preferred embodiments of the present disclosure and the technical principles used. The description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It is possible for those skilled in the art to make various obvious changes, readjustments and substitutions without departing from the protection scope of the present disclosure. Therefore, although the present disclosure is described in more detail through the above embodiments, the present disclosure is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the concept of the present disclosure, and the protection scope of the patent of the present disclosure is determined by the scope of the attached claims.

Claims

1. A signal transceiver link, characterized in that: include: Signal transmission link and signal receiving link, where: The signal transmission link includes multiple transmission channels implemented based on analog circuits, each of the transmission channels includes a respective transmission antenna, at least two of the transmission channels have different signal transmission delays, and the multiple transmission antennas transmit electromagnetic wave signals in a time division multiplexing manner; The signal receiving link includes at least one receiving channel, and the receiving channel includes a signal compensator implemented using a digital phase shift architecture; The signal compensator is configured to determine the transmission channel corresponding to the currently received echo signal, generate a compensation signal according to the delay difference of the signal transmission delay of the corresponding transmission channel relative to the reference transmission delay, and use the compensation signal to compensate the currently received echo signal.

2. The signal transceiver link according to claim 1, characterized in that: The signal transmission link further includes a waveform generator and a local oscillator connected in sequence, each of the transmission channels includes a phase shifter, a power amplifier and the transmission antenna connected in sequence, the local oscillator is respectively connected to the phase shifter of each of the transmission channels, and the waveform generator is respectively connected to the phase shifter of each of the transmission channels, wherein: The delay difference of the signal transmission delay of the transmitting channel relative to the reference transmission delay includes: the delay difference of the signal transmission delay of the transmitting antenna feeder of the transmitting channel relative to the first reference transmission delay, and / or the delay difference of the signal transmission delay from the local oscillator to the phase shifter relative to the second reference transmission delay.

3. The signal transceiver link according to claim 2, characterized in that: When the delay difference of the signal transmission delay of the transmitting channel relative to the reference transmission delay includes the delay difference of the signal transmission delay of the transmitting antenna feeder of the transmitting channel relative to the first reference transmission delay, the first reference transmission delay is the signal transmission delay of any one of the transmitting antenna feeders of the transmitting channel; when the delay difference of the signal transmission delay of the transmitting channel relative to the reference transmission delay includes the delay difference of the signal transmission delay from the local oscillator to the phase shifter relative to the second reference transmission delay, the second reference transmission delay is the signal transmission delay of the signal line from the local oscillator to any one of the phase shifters.

4. The signal transceiver link according to claim 2, characterized in that: When the delay difference of the signal transmission delay of the transmitting channel relative to the reference transmission delay includes the delay difference of the signal transmission delay of the transmitting antenna feeder of the transmitting channel relative to the first reference transmission delay, the first reference transmission delay is the signal transmission delay of the shortest transmitting antenna feeder among the multiple transmitting channels; when the delay difference of the signal transmission delay of the transmitting channel relative to the reference transmission delay includes the delay difference of the signal transmission delay from the local oscillator to the phase shifter relative to the second reference transmission delay, the second reference transmission delay is the signal transmission delay of the shortest signal line from the local oscillator to the phase shifters among the multiple transmitting channels.

5. The signal transceiver link according to claim 1, characterized in that: The receiving channel further includes a receiving antenna, a first IQ mixer, an IQ low-pass filter and an IQ analog-to-digital converter, and the receiving antenna, the first IQ mixer, the IQ low-pass filter, the IQ analog-to-digital converter and the signal compensator are connected in sequence; The signal compensator is used to perform phase difference and / or frequency difference compensation on the intermediate frequency signal output by the IQ analog-to-digital converter.

6. The signal transceiver link according to claim 1, characterized in that: The receiving channel includes an I receiving channel and a Q receiving channel, the compensation signal includes a cosine compensation signal and a sine compensation signal, the cosine compensation signal and the sine compensation signal have the same frequency, the cosine compensation signal and the sine compensation signal have the same initial phase, one of the cosine compensation signal and the sine compensation signal is used to compensate for a currently received echo signal and then output to the I receiving channel, and the other of the cosine compensation signal and the sine compensation signal is used to compensate for a currently received echo signal and then output to the Q receiving channel.

7. The signal transceiver link according to claim 6, characterized in that: The cosine compensation signal is The sinusoidal compensation signal is Where n is the digital signal sampling point, f c is the starting frequency of the electromagnetic wave signal, β is the frequency variation range of the electromagnetic wave signal, T is the frequency sweep duration of the electromagnetic wave signal, and μ is the delay difference of the signal transmission delay of the transmission channel relative to the reference transmission delay.

8. The signal transceiver link according to claim 1, characterized in that: The signal receiving link includes a plurality of receiving channels, and each receiving channel is provided with an independent signal compensator.

9. The signal transceiver link according to claim 1, characterized in that: The signal transmission link further includes a compensation module, which can be configured to compensate for at least one of IQ mismatch, IQ imbalance, signal leakage, and harmonic distortion defects of the signal transmission link.

10. An integrated circuit, characterized in that: It comprises a signal transceiver link as claimed in any one of claims 1 to 9, used for transmitting and receiving electromagnetic wave signals.

11. The integrated circuit according to claim 10, characterized in that It also includes a data processing module, which is used to process the compensated signal to achieve target detection and / or wireless communication.

12. The integrated circuit according to claim 10, characterized in that The integrated circuit is a millimeter wave chip.

13. The integrated circuit according to claim 10, characterized in that The currently received signal is an echo signal formed by the electromagnetic wave signal emitted by the signal transceiver link being emitted and / or scattered by the target, and the integrated circuit is a sensor chip.

14. An electromagnetic wave device, characterized in that: include: Carrier; An integrated circuit as claimed in any one of claims 10 to 13, arranged on a carrier; An antenna is arranged on the carrier, or the antenna and the integrated circuit are integrated into a single device and arranged on the carrier; the antenna includes a transmitting antenna and a receiving antenna; Wherein, the integrated circuit is connected to the antenna and is used for transmitting electromagnetic wave signals and / or receiving electromagnetic wave signals.

15. A device, characterized in that include: Equipment body; as well as The electromagnetic wave device as claimed in claim 14 is disposed on the device body; Wherein, the electromagnetic wave device is used for target detection and / or communication to provide reference information for the operation of the device body.

16. A signal receiving and transmitting method, characterized in that: Applied to an antenna array of an electromagnetic wave device having at least two signal transmission links, the signal transceiving method comprises: Determine a reference transmission delay and a delay difference of a signal transmission delay of each of the transmission channels relative to the reference transmission delay; Generate a compensation signal corresponding to each of the transmitting channels according to the time delay difference; The transmission channel corresponding to the currently received echo signal is determined, and the corresponding compensation signal is used to compensate for the intermediate frequency phase difference and / or frequency difference of the currently received echo signal.

17. A non-transitory computer-readable storage medium having computer-readable instructions stored thereon, which, when executed by a processor, causes the processor to execute the signal transceiving method according to claim 16.

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