摘要
基于二次相位函数的LFM信号参数估计算法计算量小、估计精度高,在雷达机动目标检测、目标运动参数估计和电子对抗等应用系统中有较好的应用前景,本文对该方法的性能和参数选取问题进行了研究,推导了输出信噪比与输入信噪比及信号长度关系的表达式,补充了文献中均方误差理论分析的高信噪比条件,给出了一种工程应用中保证可靠检测和高估计精度所需数据长度的确定方法,最后分析了QPF算法对多分量LFM信号环境的适用性。
The algorithm for LFM signals detection and parameter estimation based on quadratic phase function has low computation costs and high precision; it is considered a highly promising technique for radar moving target detection, motion estimation, and electronic counter-measure systems et al. In this paper, the performance and parameters choosing problem of the algorithm are discussed. The expression for the output SNR as a function of the input SNR and signal length is derived. The high SNR condition is given for the integrity of the theoretical MSE. The relation between lengths of signal and input SNR is presented to guarantee detection performance and a reasonably accurate estimation of the frequency rate. The problem of analysis of multi-component LFM is also studied.
出处
《信号处理》
CSCD
北大核心
2009年第12期1951-1955,共5页
Journal of Signal Processing
关键词
LFM信号
二次相位函数
参数估计
性能分析
LFM signal
Quadratic Phase Function
Parameter estimation
Performance analysis
