基于循环相关变换的多径条件下复调频信号的参数估计方法及性能分析  

Parameter estimation and analysis of LFM signal based on cyclic-correlation transform in multipath case

作　　者：史建锋[1,2] 赵闯[3] 王可人[1] 

机构地区：[1]电子工程学院,安徽合肥230037 [2]北京军代局,北京100042 [3]信息工程大学信息工程学院,河南郑州450002

出　　处：《电路与系统学报》2009年第2期56-61,17,共7页Journal of Circuits and Systems

摘　　要：针对复线性调频信号在多径条件下的参数估计问题进行了研究。利用信号循环平稳特性,分析了多径条件下复线性调频信号的循环统计特性,在此基础上提出了一种结合循环频率域的信号分离技术和循环相关函数的自相关变换的多径复LFM信号参数估计方法,从而提高了对多径复LFM信号参数估计的有效性和可靠性,然后分析了估计性能,推导了调制率估计误差方差表达式。最后采用计算机仿真实验验证了文中的结论。In this paper, the parameter estimation problem of complex LFM based on cyclic-correlation transform in multipath case is discussed. The cyclic statistics of complex LFM is analyzed, and the estimator combining signal separation technology for cycle frequency domain with the autocorrelated cyclic correlation amplitude is constructed. Then, the performances of the estimator are analyzed and the expression of error variance of modulated-slope estimate is deduced. Finally, the character of the estimator is given through computer simulation, which is in agreement with the analytic results.

关 键 词：循环相关 线性调频 多径 估计 

分 类 号：TN911[电子电信—通信与信息系统]