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Title:
RADAR-BASED RANGING PROCESSING METHOD AND DEVICE, AND UNMANNED AERIAL VEHICLE
Document Type and Number:
WIPO Patent Application WO/2019/119223
Kind Code:
A1
Abstract:
Provided are a radar-based ranging processing method and device, and an unmanned aerial vehicle. The method comprises: acquiring a differential frequency signal of a radar; acquiring input spectral amplitude data according to the differential frequency signal; acquiring a constant false alarm detection value corresponding to each spectral amplitude in the input spectral amplitude data based on a parallel processing method; searching for a target frequency point according to each spectral amplitude and the constant false alarm detection value corresponding to each spectral amplitude; and acquiring a distance value between the radar and an obstacle according to the target frequency point, wherein the method for acquiring each constant false alarm detection value is: acquiring an adjacent value sequence corresponding to a spectral amplitude and sorting two of N adjacent values in the adjacent value sequence at the same time; and completing the sorting of the adjacent value sequence by means of at most N times, and acquiring the constant false alarm detection value corresponding to the spectral amplitude according to the sorted adjacent value sequence. By means of parallel processing, the processing efficiency is improved and the processing delay is reduced, thereby improving the accuracy of radar ranging.

Inventors:
LI XUN (CN)
WANG CHUNMING (CN)
Application Number:
CN2017/116989
Publication Date:
June 27, 2019
Filing Date:
December 18, 2017
Export Citation:
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Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
G01S7/41
Foreign References:
CN105487060A2016-04-13
CN106054193A2016-10-26
CN106443671A2017-02-22
Other References:
MELEBARI, ASEM: "The effect of windowing on the performance of the CA - CFAR and OS-CFAR algorithms", 2015 IEEE RADAR CONFERENCE, 27 February 2016 (2016-02-27), pages 249 - 254, XP032865741
MAGAZ, B.: "An efficient FPGA implementation of the OS-CFAR processo", 2008 INTERNATIONAL RADAR SYMPOSIUM, 1 May 2008 (2008-05-01), pages 1 - 4, XP055621478
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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