球解码算法及其改进

首先对现有的2种球解码算法进行了研究,并对它们在性能和复杂度上进行了比较。然后,考虑性能较好的算法,在中高信噪比下适当减少搜索每一解码分量候选符号集内元素的个数,根据信号的强弱对解码信号的各维分量按从强到弱进行排序,加快了解码的速度,也在一定程度上弥补了由于减少搜索损失的性能。仿真结果表明了这种改进算法的有效性。

Sphere decoder algorithm and its improvement

First introduces two kinds of real sphere decoder algorithms,with a comparison about their performance and complexity. Then,we consider less number of searched elements among candidate symbol sets of each decoded component in medium to high SNR,and improve the better algorithm by sorting the decoded components from the strongest to the weakest,which accelerates the decoding speed and also makes up the lost performance by cutting down the number of searched elements to some extent. Simulation results prove the efficiency of this improved algorithm.