METHOD FOR RESOLVING VELOCITY AMBIGUITY BY ENTROPY SOLUTION OF MILLIMETER-WAVE MIMO TRAFFIC RADAR

摘要

A method for resolving velocity ambiguity by an entropy solution of a millimeter-wave MIMO traffic radar, comprising the following steps: acquiring a radar echo signal; acquiring preliminary distance information of a target; acquiring preliminary velocity information of the target; acquiring angle information of the target; calculating an unambiguous velocity of the target, and building an optimization model to obtain 2L groups of different compensation phases; acquiring the minimum entropy value e, and then using the 2L groups of different new weighting vectors for digital beamforming to obtain 2L groups of different output powers; and according to the position where the minimum entropy value e is located, obtaining a corresponding unambiguous velocity at said time, solving a new output power, obtaining an accurate target, and reusing a weighted vector corresponding to the minimum entropy value for use in the digital beamforming to obtain accurate angle information of the target. By means of a method for detecting multiple targets in the same dimension, highly precise and highly efficient measurements are achieved.