Abstract：A new generalized sphere decoding algorithm is proposed for under-determined MIMO systems with fewer receive antennas TV than transmit antennas M. The proposed algorithm is significantly faster than the existing generalized sphere decoding algorithms. The basic idea is to partition the transmitted signal vector into two subvectors xa and xb with N-1 and M- N+l elements respectively. After some simple transformations, an outer layer Sphere Decoder (SD) can be used to choose proper xb and then use an inner layer SD to decide xa thus the whole transmitted signal vector is obtained. Simulation results show that Double Layer Sphere Decoding (DLSD) has far less complexity than the existing Generalized Sphere Decoding (GSDs).
. 一种新的多天线系统中的快速广义球形解码算法[J]. 电子与信息学报, 2005, 27(7): 1114-1117 .
Liu Chao; Yang Zong-kai; He Jian-hua . A New Fast Generalized Sphere Decoding Algorithm in MIMO Systems. , 2005, 27(7): 1114-1117 .
2005, Vol. 27 
