Abstract：For MIMO system, as an efficient algorithm to replace ML detection, Sphere Decoding (SD) can reduce the detection complexity greatly. Whereas the bad channel with large condition number still aggravates the computation complexity of SD. In this paper, the reason of this phenomenon is firstly analyzed. Secondly, an algorithm of combining weight at high layer is proposed for SD, aiming to reduce the probability of accessing into the high layer of the tree in the searching process of SD so as to decrease the complexity. The simulation results prove that the proposed algorithm can cut down the complexity distinctly, even to more than 20% at low SNR and high condition number.
赵 慧; 龙 航; 王文博. 降低高条件数信道下的球形译码算法复杂度的方法[J]. 电子与信息学报, 2009, 31(3): 636-639 .
Zhao Hui; Long Hang; Wang Wen-bo. A Method of Reducing the Complexity of Sphere Decoder in the High-Condition Number Channel. , 2009, 31(3): 636-639 .
2009, Vol. 31 
