作　　者： ; ; ; ;

机构地区： 北京邮电大学

出　　处： 《电子学报》 2003年第7期990-993,共4页

摘　　要： 移动通信系统研究的热点之一是提高系统容量 .因此 ,空时码技术因其可在衰落环境下提供高质量的信号 ,进而提高系统容量而在无线通信中得到了广泛的研究 .最近几年 ,对空时码中的一个重要分支———垂直 贝尔实验室分层空时码 (V BLAST)的研究已经有很多 .然而 ,传统的V BLAST算法由于需要进行大量的线性迫零和串行符号删除等运算 ,时延很大 .而且发射天线数越多 ,时延也就越大 .针对上述问题 ,本文提出了一种新的基于线性迫零和并行符号删除的检测算法 .其优点是时延小且结构简单 .对于新的译码方案我们在COSSAP中平坦瑞利信道下进行了仿真 ,仿真结果显示了基于并行符号删除的新方案的误码率 (BER) To improve system capacity is always a hotspot in mobile communication systems. Therefore, space-time code techniques are widely studied in wireless communications, they provide better signal qualities in fading channel environments and increase system capacity. As an important space-time code, Vertical Bell lab Layered Space-Time (V-BLAST) code is paid much attention in recent years. However, traditional detection algorithm of V-BLAST needs much time in performing linear nulling and successive symbol cancelling. The more the number of transmit antennas are, the more the process time delay is. Aiming in solving this problem, a new scheme based on linear nulling and parallel symbol cancellation is proposed. The new scheme is of less time delay and simpler detection structure. And the simulation results of new scheme are obtained by COSSAP simulation in flat Rayleigh channels. These simulation results are presented to verify the BER performance of new scheme based on parallel symbol cancellation.

关 键 词： 多输入多输出 空时码 分层空时码

领　　域： [电子电信] [电子电信]