激光雷达相位调制信号的性能分析

Performance analysis of phase modulated signal of laser radar

对激光雷达相位调制信号进行模型构建和连续小波分析,提高信号的检测和参量估计能力,提出基于激光雷达相位调制信号检测方法。首先构建激光雷达相位调制信号模型,采用傅里叶变换分析信号进行相位调制信号尺度伸缩与时间平移关系分析,然后构建分段匹配滤波检测器检测信号,构建检验统计量进行尺度和时延参量估计。最后通过仿真实验进行性能测试,结果表明,采用本文方法进行激光雷达相位调制信号的处理和检测,能在较低的信噪比下有效检测信号,对信号和时延尺度参量估计的方差较小,实现信号性能的有效分析。

Build the phase modulation of laser radar signal model and continuously analyze the wavelet to improve the ability of signal detection and parameter estimation. A signal detection method was proposed in this paper based on laser radar. Firstly, build the phase modulation signal model based on laser radar, analyze the relation of phase modu- lation signal scale expansion and time shift by using the Fourier transform, and then test signal by building the detector of block matched filter, estimate the scale and time delay through constructing testing statistics. Finally the simulation results show that this method proposed can effectively detect the signal under the low SRN and has small variance of the estimations which realizes the effect analysis of signal performance.