Quasi-Orthogonal Space Time Block Code for Decode-and-Forward Relay Networks
A kind of quasi-orthogonal space time block code for decode-and-forward relay networks is analyzed in this paper. At the source, 4 single-antenna users transmit the quasi-orthogonal space time block code matrix. At the relay node, maximum-likelihood decoding algorithm is adopted and the decoded symbols are then encoded into quasi-orthogonal code which is transmitted through transmit antenna. At the destination, pair-wise decoding algorithm is utilized. Finally we compare the performance of the quasi-orthogonal space time block code in relay networks with that of the quasi-orthogonal space time block code in traditional communication system. Simulation results show that at the given BER of 103, the new code can provide a gain of 4dB and 1.8dB comparing with that for the traditional quasiorthogonal code. And at the given BER of 10-5, the new code can provide a gain of 4.5dB and 3.5dB comparing with that for the old quasi-orthogonal code.
space time block code decode-and-forward bit error rate maximum-likelihood decoding algorithm pair-wise decoding algorithm
Li Zhengquan Shen Lianfeng Wang Jingjing
Information Engineering College Yangzhou University Yangzhou 225009, China NMC Research Laboratory S NMC Research Laboratory Southeast University Nanjing 210096, China Information Engineering College Yangzhou University Yanezhou 225009. China
国际会议
重庆
英文
1021-1024
2009-12-25（万方平台首次上网日期，不代表论文的发表时间）