77G汽车防撞雷达角度测量算法研究

Research on the Angle Measurement Algorithm of 77G Automobile Collision Avoidance Radar

在77G汽车防撞雷达系统中,测角精度是衡量目标定位、跟踪能力的一个重要指标。然而在雷达测角过程中会遇到两个问题:一个是测角模糊问题,二是边缘测角奇异值问题,本文提出了长短基线解角度模糊算法和基线3判2去角度奇异值算法,分别用于解决以上两个问题。长短基线解角度模糊算法可以准确地解决角度模糊问题,该算法摒弃了传统算法繁琐的计算过程,通过对短基线角度估计值与模糊的三个角度估计值进行比较来解模糊,计算效率显著提高,适合用于工程实践。由于相位差周期性原因,测量的角度在正负90度的边缘处会产生测角奇异值,本文提出了基线3判2去角度奇异值算法,获得了很好的效果。

In the 77G automobile collision avoidance radar system,the angle measurement accuracy is an important indicator to judge the target positioning and tracking ability.However,two problems will be encountered in the process of radar angle measurement:one is the ambiguity of the angle measurement,and the other is the singular value of the edge angle measurement.This paper proposed a long and short baseline solution angle blur algorithm and a baseline 3 choose 2 angle removal algorithm,which are used to solve the above two problems respectively.The long and short baseline solution angle blur algorithm can accurately solve the angle blur problem.The algorithm abandoned the cumbersome calculation process of traditional algorithms,and compared the short baseline angle estimate with the three angle estimates to solve the angle blur problem,which significantly improves the calculation efficiency and is suitable for engineering practice.Due to the periodicity of the phase difference,the measured angle will have singular values at the edge of plus or minus 90 degrees.This paper proposed an algorithm for removing the singular value of the angle based on the baseline 3 choose 2.Finally,good results are obtained.