一种多目标FMCW雷达的高效距离速度测量方法

为实现FMCW（Frequency Modulated Continuous Wave）雷达在复杂多目标场合的无模糊测量，本文提出了一种梯形波调制方式，并首次推导了其在最坏情况下的虚假匹配结果数.在此基础上，本文创新地设计了快速中频容差匹配算法（TFBM，Tolerance-Fast Beat frequency Matching）和虚假目标消除算法（FGTC，Fast Ghost Targets Canceling）及其对应的容差匹配条件.其中TFBM算法可以根据一个梯形周期的测量结果，容差、快速地找出所有可能的匹配；FGTC算法可以消除TFBM算法结果中的虚假目标.严格地理论推导和仿真结果表明，在梯形波调制下的FMCW雷达配合使用TFBM和FGTC算法不仅可以无模糊测量多目标的速度、距离信息，而且可以显著地降低计算复杂度.

An Effective Method for Multi-target Range and Velocity Measure ment in FMCW Radar

In order to realize unambiguous multi-target range and velocity measurement in FMCW (Frequency Modu-lation Continuous Wave)radar,a trapezoid waveform modulation is proposed and its worst-case matching numbers is de-rived.Then two processing algorithm,TFBM and FGTC,and their matching condition have been innovatively designed. TFBM (Tolerance-Fast Beat frequency Matching)algorithm can quickly find all possible results for each period.FGTC (Fast Ghost Targets Canceling)algorithm can quickly eliminate the ghost targets which are caused by TFBM algorithm. Strictly theoretical derivation and simulation results show that the joint use of TFBM and FTGC algorithm on trapezoid waveform radar can not only measure multi-target range and velocity without ambiguity,but also reduce the computational complexity significantly.