Signal processing method and device for a frequency modulation continuous wave radar sensing system
A signal processing device, frequency modulation continuous wave technology, applied in the direction of radio wave measurement system, measurement device, radio wave reflection/re-radiation, etc., can solve traffic accidents, target objects cannot be distinguished, etc., to improve safety , Improve object resolution, improve the effect of stability
Active Publication Date: 2017-12-15
WISTRON NEWEB
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However, when there are two targets within the sensing range of the FMCW radar, if the speed difference and distance difference between the two targets are too small, the two targets may not be able to be distinguished, resulting in a report that should be sent but not sent. Reported mistakes (Miss), and even indirectly caused traffic accidents
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[0052] Please refer to figure 1 , figure 1 It is a schematic diagram of an FMCW radar sensing system 10 . The FMCW radar sensing system 10 can be installed on a car, bus, truck and other means of transportation to sense whether there are obstacles such as vehicles and people within a specific range, and to issue a warning signal accordingly, so as to prevent the driver from being negligent or Factors such as blind spots of sight lead to the occurrence of traffic accidents. The FMCW radar sensing system 10 can be divided into a transmitting part 12 and a receiving part 14 according to its operation; the transmitting part 12 includes a transmitting antenna 120, a local oscillator (Local Oscillator) 122 and a frequency sweep controller (Sweep Controller) 124 ; and the receiving unit 14 includes a receiving antenna 140 , a frequency mixing and low-pass filtering module 142 , an analog-to-digital converter 144 and a digital signal processing module 146 . The detection operation ...
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Provided is a signal processing method and device for a frequency-modulated continuous waveform radar sensing system. The signal processing method comprises the following steps: receiving a plurality of echo signals of a plurality of target objects and carrying out analog-to-digital conversion on the plurality of echo signals to obtain a digital reception signal corresponding to the plurality of echo signals; carrying out window function conversion operation on the digital reception signal to obtain a window function conversion signal corresponding to the digital reception signal; carrying out time domain to frequency domain conversion on the window function conversion signal to obtain a frequency spectrum signal of the window function conversion signal; carrying out twice beat frequency detection on the frequency spectrum signal; and judging the distance and speed of the plurality of target objects with respect to the frequency-modulated continuous waveform radar sensing system according to the results of the twice beat frequency detection. The signal processing method and device can improve object resolution capability of the FMCW radar sensing system, can improve stability of radar detection tracking, reduces miss of a radar and improves driving safety.
Description
technical field [0001] The present invention relates to a signal processing method and device for a frequency modulation continuous wave radar sensing system, especially a signal processing method and a signal processing device that can improve the tracking stability of the frequency modulation continuous wave radar sensing system and reduce errors . Background technique [0002] According to statistics, most traffic accidents are related to drivers being distracted while driving. If the driver gets a warning 0.5 seconds before a possible collision risk, at least 60% of accidents of chasing and colliding with the vehicle ahead, 30% of head-on collisions or 50% of road-related accidents can be avoided; 90% of traffic accidents can be avoided. These statistical data show that if the driver's reaction time is provided, the occurrence of traffic accidents will be effectively reduced, and vehicle warning systems, such as blind spot detection (Blind Spot Detection, BSD) system, ...
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IPC IPC(8): G01S7/02G01S13/536
CPCG01S7/41G01S13/536
Inventor 李政达郭奇政许政雄廖旗涌曾建中
Owner WISTRON NEWEB