Method for recognizing and restraining highroad background based on millimeter wave traffic radar

Abstract

The invention relates to a highway background identifying and highway background inhibiting method of a traffic radar based on millimeter wave, realizes the power spectrum automatic identification and the real-time update of highway background by utilizing traffic radar echo signals containing vehicle information and background information simultaneously, and accomplishes the inhibition of the highway background. The method takes the time domain digital echo signals of the lateral millimeter wave traffic radar as signal input, and obtains the time sequence of a radar echo power spectrum which is changed along with time by applying a periodogram method; the time sequence of the power spectrum is arranged in an ascending order according to the range of the power spectrum at each frequency point; the sequence of an ordered power spectrum with partial range is selected as effective data estimated by the power spectrum of the highway background; coherent average is performed to the sequence of the ordered power spectrum with effective range; the real-time update of the power spectrum of the highway background is realized by utilizing a self-learning method; and the highway background is inhibited. The methods can accurately identify the power spectrum of the highway background on a real-time basis, and can well inhibit the highway background, thereby greatly improving the signal-to-noise ratio of the radar echo signals.

Description

technical field [0001] The invention designs the field of traffic information collection in intelligent traffic, specifically relates to a road background recognition and road background suppression method based on millimeter-wave traffic radar, and is suitable for background recognition and background suppression of various traffic radars. Background technique [0002] The traffic information collection system is an indispensable basic component of the intelligent transportation system. The traffic information collection system relies on traffic information sensors. The ability of sensors to accurately acquire traffic data in real time is crucial to traffic control, public safety and traffic planning. With the development of economy and society, modern cities have become more congested, and traffic problems have attracted widespread attention. The accelerated pace of life makes people expect better traffic conditions. [0003] Many types of traffic information collection ...

AI Technical Summary

Problems solved by technology

[0005] However, in practical applications, the road background will cause power aliasing, which seriously affects the detection performance of the millimeter-wave traffic information detection radar.

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