GEOMETRIC METHOD FOR BLIND SIGNAL SEPARATION OF MULTICHANNEL MPSK SIGNALS  

作　　者：Fang Yong Ji Shuai Wang Min 

机构地区：[1]School of Communication and Information Engineering,Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai 200072,China

出　　处：《Journal of Electronics(China)》2012年第3期334-338,共5页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No. 60872114, 60972056, 61132004);Shanghai Leading Academic Discipline Project and STCSM (S30108 and 08DZ2231100)

摘　　要：In this letter, the problem of blind source separation of Multiple-Phase-Shift-Keying (MPSK) digital signal is considered. The geometry of received MPSK signals constellation is exploited. The column vectors of received signals can be regarded as the points of hyper-cube. All the possible distinct vectors of received signals are found by clustering, and mixing matrix and sources are estimated by searching out the pairing vectors and eliminating redundant information in all possible distinct vectors. Simulation results give the polar diagram of estimated original signals. They show that the proposed algorithm is effective when the original signals is Quadrature-Phase-Shift-Keying (QPSK) or 8-Phase-Shift-Keying (8PSK).In this letter, the problem of blind source separation of Multiple-Phase-Shift-Keying （MPSK） digital signal is considered. The geometry of received MPSK signals constellation is exploited. The column vectors of received signals can be regarded as the points of hyper-cube. All the possible distinct vectors of received signals are found by clustering, and mixing matrix and sources are estimated by searching out the pairing vectors and eliminating redundant information in all possible distinct vectors. Simulation results give the polar diagram of estimated original signals. They show that the proposed algorithm is effective when the original signals is Quadrature-Phase-Shift-Keying （QPSK） or 8-Phase-Shift-Keying （8PSK）.

关 键 词：Multiple-Phase-Shift-Keying (MPSK) Blind source separation Higher order modulation 

分 类 号：TN911.7[电子电信—通信与信息系统]