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Concatenation of Space-Time Block Codes with Constellation Rearrangement

机译:空时分组码与星座重排的串联

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摘要

Multiple antennas help in combating the destructive effects of fading as well as improve the spectral efficiency of a communication system. Receive diversity techniques like maximal ratio receive combining have been popular means of introducing multiple antennas into communication systems. Space-time block codes present a way of introducing transmit diversity into the communication system with similar complexity and performance as maximal ratio receive combining. This paper investigates the performance of constellation rearrangement scheme when used in conjunction with space-time block coding system. The idea is to use optimized constellation so that minimum squared Euclidean distance between different branches is maximized. Through exhaustive numerical search, we propose a good constellation rearrangement scheme. Maximum likelihood detector is required in the receiver but the computational complexity of the receiver does not change because through exhaustive numerical search, we propose a good constellation rearrangement scheme and save this constellation in transmitter in a table.
机译:多个天线有助于消除衰落的破坏性影响,并提高通信系统的频谱效率。诸如最大比率接收组合之类的接收分集技术已成为将多个天线引入通信系统的流行手段。空时分组码提出了一种将发射分集引入通信系统的方式,其复杂度和性能与最大比率接收组合相似。本文研究了与空时分组编码系统结合使用时的星座重排方案的性能。想法是使用优化的星座图,以使不同分支之间的最小平方欧几里德距离最大化。通过详尽的数值搜索,我们提出了一种良好的星座重排方案。接收器中需要最大似然检测器,但接收器的计算复杂度不会改变,因为通过详尽的数值搜索,我们提出了一种良好的星座重排方案,并将该星座保存在表中的发射器中。

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