低复杂度的4天线准正交空时分组码设计

一种低复杂度的4天线准正交空时分组码设计

内容简介：为了在满足全速率满分集的条件下具有较低的译码复杂度,本文设计一种4天线准正交空时分组码编码。文中的编码设计是根据当分集积最大时,选取旋转角度对星座图进行旋转来使分集积最大,获得性能最佳。星座图旋转一方面增加了准正交空时分组码的分集增益,但同时也增加了解码复杂度,所以要采用对编码矩阵进行改进来降低解码复杂度。实验结果表明：这种编码设计可以获得译码复杂度最低的单符号解码,所以对编码矩阵进行改造,得到单符号解码无疑是降低解码复杂度的有效办法。

Abstract：To achieve lower decoding complexity and could achieve full-diversity transmission at the full rate, a design of four antenna quasi-orthogonal space-time block codes in order is studied. This design can get the best performance condition by rotating the constellation when the diversity product comes to a head. Constellation rotation increases diversity gain of the quasi-orthogonal space-time block codes, but on the other hand also increases the decoding complexity, so it is necessary to improve encoding matrix to reduce the decoding complexity. Theoretical and experimental results indicate that the code design can get the single symbols decoding which is the lowest decoding complexity. Improving encoding matrix to get the single symbols decoding is undoubtedly an effective way to reduce the decoding complexity.

作者：肖乾, 邵朝,

关键词：准正交空时分组码, 最大似然算法, 旋转星座图, 对角矩阵,