复合调制信号参数估计方法的改进

The improvement on the method of composite modulation signal parameter estimation

现代通信为了实现抗干扰普遍用到复合调制信号,目前的大多数信号参数估计方法采用先验信息部分已知的假设,具有特殊性。本文设计了一种低信噪比信元的码元宽度、带宽、伪码数等参数的估计方法,对信号进行短时傅里叶变换,再对输出信号进行三阶累积量短时估计,利用信号时频图的Radon变换实现参数估计。仿真表明该方法无需先验知识,并具有通用性的优点。

Modem communication commonly used complex modulation signal in order to achieve anti-jamming. Methods using a priori information partially known hypothesis parameter estimation of most signal current. This paper describes the design of a low signal to noise ratio method for parameter estimation of code width, cell bandwidth, PN code number, the short-time Fu Liye transform of the signal, the output signal by three order cumulant short-time estimation, using the signal Radon conversion plans to achieve the parameter estimation. The simulation results show that the method without prior knowledge, and has the advantages of universal.