Vehicle target information detection and recognition system and its signal processing method

Abstract

The invention relates to a vehicle object information detection and identification system and a signal processing method thereof. Two lane calibration aided leading marks of are placed in the same lane line, distance and phase information between the two lane calibration aided leading marks and a radar detector is measured and obtained by the radar detector, object detection is carried out on an object vehicle, the distance and speed of the object vehicle are obtained, and a signal processing system resolves lane information according to the distance and phase information of the two lane calibration aided leading marks. According to the invention, vehicle objects of intermediate or long distance can be tracked continuously under the condition that the radar detector is placed at random, the distance, speed and lane information of the vehicle object can be detected in high precision, detection of low false alarm rate and high precision can be realized for the moving vehicle object on the basis that the hardware processing complexity of the system is reduced, interference and clutters can be filtered effectively in complex application, and accurate lane identification is realized for the vehicle objects of intermediate or long distance under the condition that the direction of radar wave beams is not calibrated via professional calibration equipment.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a vehicle target information detection and recognition system and a signal processing method thereof. Background technique [0002] Detection and recognition of vehicle target information is the technical basis of automotive anti-collision radar. The introduction of lane recognition (azimuth resolution) is an inevitable trend of current automotive anti-collision radar technology, which can effectively improve the performance and target detection and recognition capabilities of anti-collision radar. [0003] figure 1 The signal processing flow of the existing road vehicle detection radar technology is described. The radar transmitting system transmits a specific radar signal and the receiving system receives the echo of the detection area. After amplification, frequency mixing and A / D sampling, the difference frequency signal is obtained. The difference frequency...

AI Technical Summary

Problems solved by technology

[0005] The working environment of automotive anti-collision radar is harsh, and the false alarm problem may originate from a variety of factors. Vehicles in adjacent lanes, guardrails, roadside numbers, signage, and buildings in the air and in the distance will all affect the radar system. Interference that causes false alarms from collision avoidance radars

Images