一种多个二相编码信号载频、码率与编码序列估计方法

本文通过对二相编码信号作短时傅氏变换,把信号相位突变信息映射成时频平面内其载频处沿时间轴的幅度突变信息,由此利用信号沿载频的聚集性和载频处沿时间轴的幅度突变序列,实现多个二相编码信号的分离、载频估计、码率估计及编码序列恢复。仿真结果显示参数估计精度接近MCRLB界。

An algorithm of estimating carrier frequency ,symbol rate and phase-coded sequence of binary phase-coded signals

In this paper,the short-time Fourier transform is applied to analysis and parameter estimation of binary phase-coded signals in the additive gaussian white noise.In the time-frequency plane,phase transient change information of each binary phase-coded signal is mapped into magnitude transient change of sequence consisting of the data on its carrier frequency along time axis,and each bi- nary phase-coded signal is separated for its high focusing on cartier frequency along frequency axis.By exploiting these two procedures, a method of estimating the carrier frequency,symbol rate and phase-coded sequence of each binary phase-coded signal is proposed.Sim- ulation results shows the proposed method has a high performance close to MCRLB.