协作通信中一种分布式酉空时码

提出了一种基于三角函数酉星座的分布式酉空时码,主要介绍了编码矩阵结构及其低复杂度的译码算法。根据仿真结果可知:提出的酉空时性能差于正交设计、系统设计和循环酉群码的性能,但从译码复杂度看,所提出的译码算法计算复杂度相比其他3种简单很多,具有很大的优势。并且还证明了同样的码字采用最大似然译码算法与所提出的低复杂度算法性能相近,但是计算复杂度相差较大。总的来说,所提出的编码矩阵结构简单,易于构造,且具有较低的译码复杂度。

A Distributed Unitary Space-time Block Coding for Cooperative Communication

A distributed unitary space-time block coding based on trigonometric function for cooperative communication is proposed in this paper. It also shows the matrix structure of the non-differential coding, and the low complexity decoding algorithm. According to the result of simulation we can see that the performance of the unitary matrix constellation based on trigonometric function is worse than the orthogonal design and the systematic design and the cycle group unitary space time code. However, when to the decoding complexity, the decoding algorithm in this paper has advantages over the other three. Also,it proves that the performance of the two decoding algorithms for this code is almost the same,but the complexity has a big difference.So we can get that the structure of the code proposed in this paper is easy and the decoding complexity is lower.