%0 Journal Article
%A FU Wei-hong
%A LIU Nai-an
%A WU Shao-hao
%A YANG Bo
%T Underdetermined Blind Source Separation of Frequency Hopping Signal
%D 2015
%R 10.13190/j.jbupt.2015.06.003
%J Journal of Beijing University of Posts and Telecommunications
%P 11-14,19
%V 38
%N 6
%X <p>Aiming at the underdetermined blind source separation (UBSS) of frequency hopping, a UBSS algorithm based on filtering was proposed to solve the problems of high computation and low estimated accuracy of signal caused by distortion method in existing time-frequency domain. Firstly, according to the estimated carrier frequencies, some kinds of band pass filters were designed. And the observed signals were filtered by using these band pass filters. After that, we can get the filter signals just composed of one source signal. Thus, the original UBSS problem was transferred into several UBSS problems in which the sparsity in time domain is satisfied. Finally, according to the filtered signals, the source signal was estimated by using the time domain UBSS algorithm. Simulation show that proposed algorithm can get more accurate estimated signals and have fewer processing data and lower computation complexity. The signal to interference ratio o of proposed algorithm is 4dB bigger than that of time-frequency domain method.</p>
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2015.06.003