CAJ | 학술논문

对两发送天线MIMO系统在相关瑞利和莱斯信道下V-BLAST检测算法的性能进行了分析,推导出最优和固定检测两种方案中第一步和第二步的误码率.相对于独立同分布瑞利信道,考察了相关瑞利信道和莱斯信道对接收信噪比的影响;相对于固定检测方案,讨论了最优检测算法对信噪比的提升.理论分析和仿真结果表明,瑞利信道相关性或莱斯信道的直达波分量会减弱最优检测方案对信噪比的提升.
대량발송천선MIMO계통재상관서리화래사신도하V-BLAST검측산법적성능진행료분석,추도출최우화고정검측량충방안중제일보화제이보적오마솔.상대우독립동분포서리신도,고찰료상관서리신도화래사신도대접수신조비적영향;상대우고정검측방안,토론료최우검측산법대신조비적제승.이론분석화방진결과표명,서리신도상관성혹래사신도적직체파분량회감약최우검측방안대신조비적제승.
The performance of vertical Bell Labs Space-Time (V-BLAST) algorithms for the MIMO systems with two transmit antennas is analyzed over correlated-Rayleigh channel and Rician channel.We derive the analytical bit error rates (BERs) of the first and second detection steps for both optimal and fixed detection ordering schemes. We also investigate the signal-to-noise ratio(SNR) degradation of the detection steps for correlated-Rayleigh and Rician channels over an independent and identically distributed (I.I.d.) Rayleigh channel.Afterwards,the effect of optimal ordering on the SNR improvement over fixed detection ordering has been discussed. Results have shown that the correlation or line-of-sight component reduce the SNR improvement of optimal ordering in the first step, whereas the correlation have no effect on the performance of the second step for a correlated-Rayleigh channel.