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Millimeter wave radar large dynamic range echo adaptive control method

A large dynamic range, self-adaptive control technology, applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve problems that cannot meet the requirements, achieve high-precision measurement, and improve data accuracy Effect

Pending Publication Date: 2022-01-18
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0003] The technical problem solved by the invention is: Aiming at the problem that the traditional fixed-gain radar system design method and the echo data full-precision post-processing method can no longer meet the requirements in the current prior art, a millimeter-wave radar with a large dynamic range echo is proposed. wave adaptive control method

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  • Millimeter wave radar large dynamic range echo adaptive control method

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Embodiment Construction

[0024] An adaptive control method for large dynamic range echoes of millimeter-wave radars, which can perform power calculations based on collected echoes, and adaptively control the radar system gain and the truncation value in digital processing to ensure that the system will not be saturated at the same time To meet the requirements of high-precision measurement, the distance process of the control method is as follows:

[0025] (1) Perform AD acquisition on the echo signal, and count the number of points where the amplitude of the echo signal exceeds the set threshold;

[0026] Among them, the amplitude of all collected echoes in a frame signal is compared with the upper threshold and the lower threshold, and the number of points N higher than the upper threshold is calculated up , the number of points N below the lower threshold down ;

[0027] (2) Judging the echo signal amplitude according to the result obtained in step (1), and determining whether to perform gain con...

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Abstract

The invention relates to a millimeter wave radar large dynamic range echo adaptive control method, and provides a millimeter wave radar large dynamic range echo adaptive control method aiming at the requirements that the operating distance range of the microwave distance and speed measuring sensor is larger and larger and the real-time requirement is higher and higher in future deep space exploration tasks, the gain of a radar radio frequency part can be adaptively adjusted, it is guaranteed that signals acquired by AD are unsaturated, adaptive truncation processing is carried out on intermediate process data in real-time processing, and the contradictions of high-precision measurement, limited hardware resources and high real-time requirement are solved. Through the method, adaptive control of radar large-dynamic-range echoes can be realized, and real-time, high-precision and high-reliability distance and speed measurement is ensured.

Description

technical field [0001] The invention relates to a large dynamic range echo adaptive control method of a millimeter wave radar, which belongs to the field of space microwave remote sensing. Background technique [0002] In the landing detection of extraterrestrial objects such as the moon, Mars, and asteroids, the microwave ranging and speed measuring sensor is the key equipment of the lander's navigation, guidance and control (GNC) subsystem. The distance and velocity information on the surface of extraterrestrial celestial bodies ensures the accuracy and safety of landing, and determines whether the lander can land in the designated detection area with high precision and high reliability. The microwave ranging and speed measuring sensor is the name of the detector for the microwave ranging and speed measuring equipment. It is the commonly understood microwave ranging and speed measuring radar. The current working frequency band has reached the Ka band. Microwave ranging an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/08G01S13/58
CPCG01S7/41G01S13/08G01S13/58
Inventor 李拴劳张爱军牛文博王振西贾建超吴晓明郑适
Owner XIAN INSTITUE OF SPACE RADIO TECH
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