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Crystalless FMCW Radar Transceiver System and Frequency Calibration Method

A transceiver, automatic frequency correction technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, instruments, etc., can solve the complex design of the calibration system, the inability to meet the chirp requirements of FM continuous wave radar, and the increase in calibration costs and other problems, to achieve the effect of high-precision signal transmission

Active Publication Date: 2022-06-28
珠海正和微芯科技有限公司
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Problems solved by technology

[0003] In this regard, in related technologies, digital-to-analog converters and voltage-controlled oscillators are used to achieve frequency modulation, and the required frequency accuracy is achieved by adopting temperature drift standards and anti-power supply ripple design, but this structure cannot meet the requirements of frequency modulation continuous wave Radar Chirp Requirements
In addition, oscillators and phase-locked loops are also used to realize frequency modulation, and receivers and digital processing circuits of wireless transceiver systems are used to obtain frequency process deviations. However, during the testing process of this scheme, an external target is required. Frequency signal source, and configure the RF front-end as calibration mode, then continuously adjust the output of the frequency synthesizer, and then use the receiver to search for the signal to obtain the frequency deviation, so the design of the entire calibration system is relatively complicated, which increases the cost of calibration

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  • Crystalless FMCW Radar Transceiver System and Frequency Calibration Method
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  • Crystalless FMCW Radar Transceiver System and Frequency Calibration Method

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[0038] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0039] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number . If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating t...

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Abstract

The invention discloses a crystal-less FMCW radar transceiver system and a frequency calibration method, and relates to the field of wireless transceiver technology. The crystal-free FMCW radar transceiver system realizes the frequency by means of an oscillator with calibration and frequency drift compensation and a radio frequency phase-locked loop. The modulation does not require additional receiving channels to obtain frequency deviations, which can reduce the number of modules involved in calibration, thereby simplifying the calibration process and circuits, and reducing the cost of calibration testing.

Description

technical field [0001] The invention relates to the technical field of wireless transceivers, in particular to a crystal-free FMCW radar transceiver system and a frequency calibration method. Background technique [0002] With the update of process technology, radar has inherent advantages in smart home products with the advantages of strong anti-interference, good installation privacy and no privacy leakage. However, consumer electronics are price-sensitive, and small size and low cost are the keys to the implementation of technical solutions. Omitting the off-chip crystal oscillator can reduce the cost while reducing the chip package size. However, in order to comply with the spectrum emission rules of the European Telecommunications Standardization Association and the Federal Communications Commission of the United States, the FMCW (Frequency Modulated Continuous Wave, Frequency Modulated Continuous Wave) radar transceiver system outputs The accuracy of the frequency is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/02G01S7/40
CPCG01S13/02G01S7/4056
Inventor 潘攀周亚运鲁宏涛
Owner 珠海正和微芯科技有限公司
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