基于积分二次相位函数的多分量LFM信号分析  

Analysis of Multi-component LFM Signals by the Integrated Quadratic Phase Function

作　　者：李宏[1] 秦玉亮[1] 李彦鹏[1] 王宏强[1] 黎湘[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2009年第6期1363-1366,共4页Journal of Electronics & Information Technology

摘　　要：基于二次相位函数的调频率估计算法用于多分量LFM信号时,信号间互扰严重并且会产生伪峰。针对这一问题,该文采用积分二次相位函数,提出了一种改进的多分量LFM信号分析方法,仿真实验表明:该方法相比于原方法能够有效抑制伪峰和信号间互扰,同时要求的信噪比门限低,估计均方误差更接近CRLB。The algorithm based on quadratic phase function is efficient to estimate the parameters of the LFM signals. When it is dealing with the multi-comment LFM signals, spurious peaks arise and interference is severe. A new approach based on integrated quadratic phase function is proposed to solve the problem. The performance of the proposed approach is evaluated by simulation to show that the method presents advantages in terms of that it can suppress the spurious peaks and interference and gives a closer approach to the CRLB and a lower SNR threshold with respect to the quadratic phase function.

关 键 词：信号处理 LFM信号 参数估计 积分二次相位函数 

分 类 号：TN911.7[电子电信—通信与信息系统]