一种改进的空时Lattice译码算法

An improved space-time Lattice decoding algorithm

目的降低分层空时接收机的球形译码算法复杂度,提高运算速度。方法对信号矢量的分量进行分组,每个分组内部采用球形译码算法进行检测,而各个分组之间通过判决反馈的方式进行干扰抵消。结果计算机仿真结果表明,新算法能够明显地降低接收机译码过程的计算量。结论由于在各个分组内部进行球形译码,大大降低了最坏情况下的计算量,从而简化了接收机复杂度。

Aim In order to reduce the computation complexity and improve processing speed of sphere decoding based layered space-time receiver a new receiver scheme with groping sphere decoding structure is presented. Methotis The elements of signal vector are divided into several groups. The receiver performs sphere decoding for the elements within the same group. The already detected groups are cancelled by using decision feed equalization. Resuits Simulation results show that the decoding complexity of the new algorithm is much lower compared to that of the original sphere decoding algorithm. Conclusion Since the sphere decoding are performed in each group separately the worst ease complexity of sphere decoding is reduced dramatically.