A Fast Generalized Complex Sphere Decoder for MIMO Systems
一种MIMO系统中的快速广义复球形解码算法

A fast generalized complex sphere decoder is proposed for under-determined MIMO systems with fewer receive antennas than transmit antennas in this paper. It can handle both the lattice-structured and non-lattice-structured constellations in two-dimensional space. This algorithm adopts optimal search scheme on the under-determined part of the transmitted signal, thus avoids the high complexity of the exhaustive search scheme. The simulation results show that the complexity of the generalized complex sphere algorithm is significantly lower than that of the exhaustive search scheme.