单天线接收时频混叠的异频数字通信信号盲源分离算法

本文针对单天线接收时频混叠数字通信信号的盲源分离问题，基于源信号之间载波差异性，构建单天线接收信号虚拟多通道模型，实现了源信号分离与重构。该算法通过对单天线接收混合信号进行短时傅里叶变换，分析各个中心频率的源信号频域特性，提取各个源信号的幅度与相位信息。利用提取信息，实现源信号分离与重构。仿真结果表明，该算法可以有效的实现单天线接收时频混叠数字通信信号的盲源分离。 

Single-antenna blind signal separation algorithm for time-frequency overlapped digital communication signal with distinct carrier frequency

In this paper, based on the carrier frequency distinct feature among original sources, a blind signal separation method is proposed for the single-antenna time-frequency overlapped digital communication signal.The method changes the single-antenna recording into multi-channel model based the feature that the carrier frequency of original sources are different from each other. Then, the method analyzes spectral information obtained by the short time Fourier transform to extract amplitude and phase values at each center frequency of overlapped signals. Using those extracted information enables signals from single-antenna data to be separated and reconstructed. The simulation tests demonstrate the feasible feasibility of the proposed approach for single-channel time-frequency overlapped digital communication signal separation.