一种联合酉空时星座图的分类解调算法

本文提出了一种基于排列法和旋转法联合生成的酉空时星座图设计新方法,该方法可为酉空时信号提供性能较好的星座图.同时,针对这种联合星座图给出了一种新型的分类解调算法,该算法可以以很低的错误概率识别出发射信号的类型,从而通过分类来缩小最大似然原则下的星座点搜索范围,在提高误码率性能的同时也降低了复杂度.理论分析和仿真结果都表明,与一些单一方法生成的星座图相比,本文所提出新型联合星座图在误比特率性能和解调算法复杂度上都有较大的改善.

A Classification Demodulation Algorithm of Joint Unitary Space-Time Constellations

In the paper,we propose a new design of unitary space-time constellations which is generated based on a combination of permutation method and rotation method.This method can provide better performance for the unitary space-time constellation signal.At the same time,for this joint constellation,a new classification demodulation algorithm is given.This algorithm can recognize the class of transmission signal with very low error probability and reduce the research range under the maximum-likelihood algorithm,so both the error performance and the complexity of constellations can be improved.Theoretical analysis and simulation results all show that the performances of proposed constellations are better than some other constellations which are designed by only one method while the complexity of demodulation is reduced greatly.