Environmental target speed ambiguity resolution method and system based on automobile radar, and medium

Abstract

The invention discloses an environmental target speed ambiguity resolution method and an environmental target speed ambiguity resolution system based on an automobile radar, and a storage medium, which belong to the technical field of radar speed measurement, and aim to solve the technical problems of large ambiguity resolution calculation amount and low precision at present. The environmental target speed ambiguity resolution method is characterized by comprising the steps of: transmitting two groups of pulse Doppler signals with different pulse repetition periods on the basis of an automobile radar to obtain two groups of different two-dimensional FFT data; counting a target number of different Doppler dimensions in the two groups of two-dimensional FFT data, and acquiring the Doppler dimension position with the largest target number, namely the Doppler dimension position of the environment target; and solving a real speed of the environment target by adopting a hypothesis verification method. The environmental target speed ambiguity resolution method, the environmental target speed ambiguity resolution system and the storage medium have the advantages of being small in calculation amount, high in precision, easy and convenient to operate and the like.

Description

technical field [0001] The invention relates to the technical field of radar speed measurement, in particular to a method, system and medium for defuzzifying the speed of an environmental target based on automobile radar. Background technique [0002] Vehicle-mounted millimeter-wave radar is a transceiver device installed on a car for obstacle target detection. It emits electromagnetic waves to the space around the car, and part of the electromagnetic waves returns to the radar after encountering obstacles. After receiving the echo signals, the radar performs a series of signal processing techniques to obtain the distance, speed, angle, etc. of each obstacle target touched by the electromagnetic waves. information. The radar has a certain detection range for the above-mentioned target information. When the target is within the detection range, the above-mentioned detection information is accurate; when the target exceeds the detection range, the above-mentioned inspection r...

AI Technical Summary

Problems solved by technology

[0008] (1) The existing speed defuzzification method performs indiscriminate defuzzification on both environmental targets and non-environmental targets, resulting in a sharp increase in the amount of computation, and due to amplitude matching errors, it is prone to defuzzification errors;

[0009] (2) Since the defuzzification has a certain success rate, the defuzzification result of the environmental target may be wrong, resulting in error prone defuzzification;

[0010] (3) According to the existing defuzzification method, the more targets there are, the lower the success rate of defuzzification is, and the frequency spectrum of environmental targets is likely to interfere with moving targets, resulting in the failure of defuzzification of dangerous targets such as vehicles and people.

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