线性调频连续波信号的检测和参数估计  

Detection and Parameter Estimation of Linear Frequency Modulation Continuous Wave Signal

作　　者：朱文涛[1] 郑纪彬[1] 苏涛[1] 朱凯然[1] 张龙[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《电子与信息学报》2013年第7期1562-1568,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61001204)资助课题

摘　　要：针对长时间积累较难在线性调频连续波信号的检测和参数估计中应用的问题,该文提出一种联合变窗长相干平均法与循环平稳法的线性调频连续波信号检测与参数估计算法。首先基于分段相干的思想采用变窗长相干平均法提高信噪比的增益,然后利用循环平稳法完成信号的检测和参数估计。该算法以较低计算复杂度实现信号的长时间积累,并且解决了起始时间给信号检测和参数估计带来的问题,在低信噪比条件下具有较好的估计性能。仿真结果验证了方法的有效性。Considering application of long time accumulation to the detection and parameter estimation of Linear Frequency Modulated Continuous Wave（LFMCW）,a novel method based on the joint window-variant coherent average method and cyclostationary method is proposed to detect LFMCW signal and estimate its parameters.Firstly,the improvement of Signal-to-Noise Ratio（SNR） gain is extracted with window-variant coherent average method based on segmentation coherent.And then,cyclostationary method is utilized to finish the detection and parameters estimation of LFMCW signal.The algorithm realizes long time accumulation with low computational complexity and solves the problem brought by initial time-offset.On the low SNR condition,this method still has better estimation performance.Simulations verify the effectiveness of the method.

关 键 词：信号检测 参数估计 线性调频连续波 循环平稳 相干平均 

分 类 号：TN957.51[电子电信—信号与信息处理]