A two-user cooperative diversity system based on Alamouti signaling was proposed, which utilizes the orthogonal structure of Alamouti signaling to make cooperative users relay on the shared channel resources so that t...A two-user cooperative diversity system based on Alamouti signaling was proposed, which utilizes the orthogonal structure of Alamouti signaling to make cooperative users relay on the shared channel resources so that the spectral efficiency of the traditional cooperative system can be improved.When M -ary phase shift keying （M -PSK） modulation and an improved selection decode-and-forward （SDF） relaying protocol with limited feedback are used at the users and m（m 1） receive antennas are configured at the base station, the average bit-error-rate （BER） system performance for statistically similar uplink channels was derived and it was verified by simulations.Under various channel scenarios of interest, numerical and simulation results show that the diversity gain achieved and the BER performance of the proposed system increase with the interuser channel quality, and the full transmit diversity order of two can be obtained for sufficiently high interuser signal-to-noise ratios （SNRs）.展开更多
基金Supported by the National High-Tech Research & Development Program of China (Grant No 2006AA01Z270)the National Natural Science Foundation of China-Guangdong (Grant No U0635003)+2 种基金the Natural Science Foundation of Shaanxi Province (Grant No 2007F07)the "111"Project (Grant No B08038)the Open Research Fund of State Key Laboratory of Rail Traffic Control and Safety, Bejing Jiaotong University(Grant No RCS2008K003)
文摘A two-user cooperative diversity system based on Alamouti signaling was proposed, which utilizes the orthogonal structure of Alamouti signaling to make cooperative users relay on the shared channel resources so that the spectral efficiency of the traditional cooperative system can be improved.When M -ary phase shift keying （M -PSK） modulation and an improved selection decode-and-forward （SDF） relaying protocol with limited feedback are used at the users and m（m 1） receive antennas are configured at the base station, the average bit-error-rate （BER） system performance for statistically similar uplink channels was derived and it was verified by simulations.Under various channel scenarios of interest, numerical and simulation results show that the diversity gain achieved and the BER performance of the proposed system increase with the interuser channel quality, and the full transmit diversity order of two can be obtained for sufficiently high interuser signal-to-noise ratios （SNRs）.
