一种时空频分组码编码方案和检测算法

空时编码作为对抗多径衰落的有效方法，近年来已经成为热门研究领域。空时分组码(STBC)的正交设计可以在接收端进行线性最大比合并解码，实现了高编码增益、大分集度和低译码复杂度。这种空时分组码在单个载波多个不同天线和时间上编码，实现了空间和时间的分集，但并没有实现频率的分集，分集度有限。本文将单载波的STBC扩展到多个载波，提出了一种时、空、频分组码(STFBC)的编码方案。这种编码在相同的码速率下，实现了比STBC更大的分集度和更高的编码增益。给出了基于这种编码方案的两种检测算法一线性合并最大似然检测(MLD)算法和线性合并解相关检测(DD)算法。仿真结果表明这种时空频分组码的编码方法和检测算法较STBC具有更好的性能。

A Scheme of Space-Time-Frequency Block Coding and Detection Algorithms

Space-time coding as an effective way to mitigate multi-path fading has been a hot topic of research. The orthogonal design of Space-Time Block Coding (STBC) makes linear maximum ratio combined decoding with high coding gain, high diversity order and low complexity at the receiver possible. To increase the diversity further, the STBC is expanded from single to multi-carriers as to include frequency diversity resulting in Space-Time-Frequency Block Coding (STFBC). Using this new scheme, higher diversity order and coding gain can be achieved than STBC at the same coding rate. Two detection algorithms of linear combination Maximum Likelihood Detection (MLD) and linear combination Decorrelating Detection (DD) are also proposed. Simulation results show that the proposed scheme of STFBC and its related detection algorithms can provide the better performance.