摘要
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。
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 binary phase-coded signal is separated for its high focusing on carrier 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. Simulation results shows the proposed method has a high performance close to MCRLB.
出处
《信号处理》
CSCD
北大核心
2006年第5期639-643,共5页
Journal of Signal Processing
