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CN-119154895-B - Signal transmitting link, signal transmitting method, signal transmitting and receiving link, integrated circuit and electromagnetic wave device

CN119154895BCN 119154895 BCN119154895 BCN 119154895BCN-119154895-B

Abstract

The signal transmitting link comprises an originating baseband digital module, a digital-to-analog conversion module, an originating local oscillator and an originating quadrature modulator, wherein the digital-to-analog conversion module comprises two identical digital-to-analog converters, the originating baseband digital module is configured to generate two paths of orthogonal originating digital baseband signals and send the two paths of orthogonal originating digital baseband signals to the digital-to-analog converters respectively, the digital-to-analog conversion module is configured to convert the two paths of orthogonal originating digital baseband signals into two paths of originating analog baseband signals, the originating local oscillator is configured to provide an originating local oscillator signal, and the originating quadrature modulator is configured to shift the phase of the originating local oscillator signal while frequency shifting based on the two paths of originating analog baseband signals so as to form an FMCW radio frequency transmitting signal after predetermined phase shifting.

Inventors

  • ZHANG ZHAN
  • CHEN JIASHU

Assignees

  • 加特兰微电子科技(上海)有限公司

Dates

Publication Date
20260505
Application Date
20240514
Priority Date
20230614

Claims (17)

  1. 1. The signal transmitting link is characterized by comprising an originating baseband digital module, a digital-to-analog conversion module, an originating local oscillator and an originating quadrature modulator, wherein the digital-to-analog conversion module comprises two identical digital-to-analog converters, and the digital-to-analog conversion module comprises: The originating baseband digital module is configured to generate two paths of orthogonal originating digital baseband signals, and send the two paths of orthogonal originating digital baseband signals to one digital-to-analog converter respectively, wherein the originating digital baseband signals are single-tone signals; The digital-to-analog conversion module is configured to convert the two paths of orthogonal originating digital baseband signals into two paths of originating analog baseband signals; the originating local oscillator is configured to provide an originating local oscillator signal, the originating local oscillator signal being an FMCW signal in a centimeter or millimeter wave band, and The transmitting quadrature modulator is configured to perform a phase shifting operation on the transmitting local oscillation signal while performing a frequency shifting operation on the transmitting local oscillation signal based on the two paths of transmitting analog baseband signals so as to form a predetermined phase-shifted FMCW radio frequency transmitting signal; the digital baseband signal at the transmitting end comprises preset phase information, so that the FMCW radio frequency transmitting signal after the preset phase shift is radiated into a preset space area through a transmitting antenna, and the preset phase information is the difference between the phase of the FMCW radio frequency transmitting signal after the preset phase shift and the phase of the local oscillation signal at the transmitting end.
  2. 2. The signal transmission link of claim 1, wherein the frequency bandwidth of the originating local oscillator signal is above 2 GHz.
  3. 3. A signal transmitting link is characterized by being applied to a radar system, wherein the signal transmitting link comprises a first signal source and a digital phase shifting module, The first signal source is configured to generate a first analog signal, wherein the first analog signal is an FMCW signal in a centimeter or millimeter wave band, and The digital phase shifting module is configured to shift the phase of the first analog signal by adopting a digital quadrature modulation mode so as to form a predetermined FMCW radio frequency transmitting signal after phase shifting; the digital phase shift module comprises a second signal source, a digital-to-analog conversion module and a mixer which are connected in sequence, The second signal source is configured to generate a first digital signal; the digital-to-analog conversion module is configured to convert the first digital signal into a second analog signal, and The mixer is configured to shift the phase of the first analog signal based on the second analog signal or shift the frequency while shifting the phase of the first analog signal to form the predetermined phase-shifted FMCW radio frequency transmission signal, and the phase of the first digital signal is a difference between the phase of the predetermined phase-shifted FMCW radio frequency transmission signal and the phase of the first analog signal.
  4. 4. The signal transmission link of claim 3, wherein the first digital signal comprises two orthogonal originating digital baseband signals; The second signal source is an originating baseband digital module, and the digital-to-analog conversion module comprises two identical digital-to-analog converters; The originating baseband digital module is configured to generate two paths of orthogonal originating digital baseband signals, and send the two paths of orthogonal originating digital baseband signals to one digital-to-analog converter respectively; the digital-to-analog conversion module is configured to convert the two paths of orthogonal originating digital baseband signals into two paths of originating analog baseband signals.
  5. 5. The signal transmission link of any one of claims 3-4, wherein the first signal source is an originating local oscillator and the first analog signal is an originating local oscillator.
  6. 6. The signal transmission link of claim 5, further comprising a power amplifier configured to amplify the FMCW radio frequency transmission signal.
  7. 7. The signal transmission link of claim 6, further comprising a transmit antenna configured to radiate the power amplified FMCW radio frequency transmit signal to a predetermined area.
  8. 8. A signal transceiving link comprising a signal transmitting link according to any of claims 1 to 7, and a signal receiving link and a calibration link; the signal receiving link comprises a receiving end local oscillator, a receiving end mixer, an analog-to-digital converter and a receiving end band digital module, wherein, The receiving end local oscillator is configured to provide a receiving end local oscillator signal; the receiving-end mixer is configured to perform mixing operation on the received echo signals based on the receiving-end local oscillation signals to obtain receiving-end analog baseband signals, wherein the echo signals are signals formed by reflecting and/or scattering signals transmitted by the signal transmitting link by a target object; the analog-to-digital converter is configured to convert the receiving-end analog baseband signal into a receiving-end digital baseband signal; the receiving end digital baseband module is configured to process the receiving end digital baseband signal so as to realize target detection and/or wireless communication; the calibration link comprises an auxiliary receive path, ARX, and a calibration receive unit configured to calibrate the ARX, the calibrated ARX configured to calibrate the signal transmission link.
  9. 9. The signal transceiving link according to claim 8, wherein the receive side mixer is a real mixer and the analog-to-digital converter is a real analog-to-digital converter, or wherein the receive side mixer is a real mixer and the analog-to-digital converter is a real analog-to-digital converter The receiving end mixer is a quadrature mixer, and the analog-to-digital converter is a quadrature analog-to-digital converter.
  10. 10. The signal transceiving link according to claim 8, wherein the receiver local oscillator signal is a swept frequency signal or the receiver local oscillator signal is a mono-tone signal.
  11. 11. The signaling link of claim 8, further comprising a receive antenna configured to receive echo signals.
  12. 12. An integrated circuit comprising a signal transmission link as claimed in any one of claims 1 to 7 or a signal transceiving link as claimed in any one of claims 8 to 11.
  13. 13. The integrated circuit of claim 12, wherein the integrated circuit is a millimeter wave chip.
  14. 14. An electromagnetic wave device, comprising: A carrier; an integrated circuit as claimed in any one of claims 12 to 13, disposed on the carrier; the antenna is arranged on the carrier, or the antenna and the integrated circuit are integrated into a whole device and arranged on the carrier, and the antenna comprises a transmitting antenna and a receiving antenna; The integrated circuit is connected with the antenna and is used for transmitting electromagnetic wave signals and/or receiving electromagnetic wave signals.
  15. 15. A user terminal device, comprising: an apparatus body, and The electromagnetic wave device according to claim 14 provided on the apparatus body; wherein the electromagnetic wave device is used for target detection and/or wireless communication to provide reference information for the operation of the equipment body.
  16. 16. A signal transmission method for use in a radar system having at least one signal transmission link according to any one of claims 1 to 7, the signal transmission method comprising: determining the phase of the radio frequency transmission signal of each signal transmission link; Determining an initial phase of an originating digital baseband signal in each signal transmission link according to the phase of the radio frequency transmission signal, wherein the originating digital baseband signal is a single-tone signal of a MHz level; generating the originating digital baseband signal according to the determined initial phase; And converting the originating digital baseband signal into an originating analog baseband signal, and performing phase shifting operation on an originating local oscillator signal based on the originating analog baseband signal, wherein the originating local oscillator signal is an FMCW signal in a centimeter wave frequency band or a millimeter wave frequency band.
  17. 17. A non-transitory computer readable storage medium having stored thereon computer readable instructions that, when executed by a processor, cause the processor to perform the signal transmission method of claim 16.

Description

Signal transmitting link, signal transmitting method, signal transmitting and receiving link, integrated circuit and electromagnetic wave device The present application claims priority from the chinese patent application filed on day 14, 6, 2023, titled "signal transmitting, calibrating, compensating and transceiving links," to the chinese patent office, application No. 202310702586.5, IQ mixers, integrated circuits, sensors and devices, "the contents of which are understood to be incorporated herein by reference. Technical Field Embodiments of the present disclosure relate to, but not limited to, the technical field of electromagnetic wave devices, and in particular, to a signal transmitting link, a signal transmitting method, a signal receiving link, an integrated circuit, and an electromagnetic wave device. Background At this stage, the Transmitting (TX) end of the fm continuous wave (Frequency Modulated Continuous Wave, FMCW) radar system is swept by a Phase-locked loop (PLL) circuit and then Phase modulated by an analog Phase shifter, such as a vector synthesis Phase shifter, a delay line Phase shifter, or the like. However, the Accuracy of phase modulation (Resolution) and Accuracy of phase modulation (Accuracy) of analog phase shifters are low, which limits the performance of the system, for example, in automotive radar, in some specific emission regimes, the low Accuracy of analog phase shifters can affect the detection of the target by the system. In addition, the analog phase shifter has the problems of large area, large loss, poor stability, channel coupling and the like, and when the multi-antenna phase shifters are used together, the performances of the phase shifters can be mutually influenced, so that the performance of the system is further deteriorated. The phase modulation accuracy and the phase modulation accuracy of the analog phase shifter can be improved by performing the off-line calibration on the analog phase shifter, but the result of the off-line calibration is not necessarily accurate when the chip is operated in different states (temperatures). In addition, for analog phase shifters, a greater hardware cost is required to achieve higher accuracy phase shifting. Disclosure of Invention 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. The embodiment of the disclosure provides a signal transmitting link, which is applied to a radar system and comprises an originating baseband digital module, a digital-to-analog conversion module, an originating local oscillator and an originating quadrature modulator, wherein the digital-to-analog conversion module comprises two identical digital-to-analog converters, the originating baseband digital module is configured to generate two paths of orthogonal originating digital baseband signals and send the two paths of orthogonal originating digital baseband signals to the digital-to-analog converters respectively, the digital-to-analog conversion module is configured to convert the two paths of orthogonal originating digital baseband signals into two paths of originating analog baseband signals, the originating local oscillator is configured to provide an originating local oscillator signal, and the originating quadrature modulator is configured to perform a phase shifting operation on the originating local oscillator signal while performing frequency shifting based on the two paths of originating analog baseband signals so as to form a predetermined FMCW radio frequency transmitting signal after phase shifting. The embodiment of the disclosure also provides a signal transmitting link, which is applied to an electromagnetic wave transmitting device and comprises a first signal source and a digital phase shifting module, wherein the first signal source is configured to generate a first analog signal, and the digital phase shifting module is configured to carry out frequency shifting and/or phase shifting on the first analog signal by adopting a digital quadrature modulation mode so as to form an FMCW radio frequency transmitting signal. The embodiment of the disclosure also provides a signal receiving and transmitting link, which comprises the signal transmitting link and the signal receiving link according to any embodiment of the disclosure; The signal receiving link comprises a receiving end local oscillator, a receiving end mixer, an analog-to-digital converter and a receiving end baseband digital module, wherein the receiving end local oscillator is configured to provide a receiving end local oscillator signal, the receiving end mixer is configured to conduct mixing operation on a received echo signal based on the receiving end local oscillator signal to obtain a receiving end analog baseband signal, the echo signal is a signal formed by reflecting and/or scattering a signal transmitted by the signal transmitting link by a target object, the analog-to-dig