A Sphere Decoding Algorithm for MIMO Channels
A Sphere Decoding Algorithm for MIMO Channels
复制标题
MIMO信道的球形解码算法
DOI：
10.1109/isspit.2006.270853
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
T. Sang
中科院分区：
文献类型：
--
作者：
Chin;T. Sang
多输入多输出（MIMO）传输已经成为提高频谱效率的流行技术。同时，设计低成本的MIMO信道接收机仍然是一个具有挑战性的任务。最大似然（ML）检测器具有很好的性能，但其计算复杂度非常高。基于球形译码（SD）的接收机达到了ML检测器的性能，并且潜在地可以节省大量的计算成本。本文提出了一种实用的球形译码算法。该算法采用了一种简单有效的初始半径设置方法，初始半径的设置对计算复杂度起着决定性的作用。此外，本文还采用了伪天线增强技术，使得在接收天线数小于发射天线数的情况下，也可以应用SD算法，从而增强了该算法的适用性
Multi-input multi-output (MIMO) transmission has become a popular technique to increase spectral efficiency. Meanwhile, the design of cost-effective receivers for MIMO channels remains a challenging task. Maximum-likelihood (ML) detector can achieve superb performance, yet the computational complexity is enormously high. Receivers based on sphere decoding (SD) reach the performance of ML detectors, and potentially a great deal of computational cost can be saved. In this paper, a practical sphere-decoding algorithm is proposed. It utilizes a simple and effective way to set the initial radius which plays a decisive role in determining the computational complexity. Furthermore, a pseudo-antenna augmentation scheme is employed such that SD can be applied where the number of receive antennas is less than that of transmit antennas; thus enhance the applicability of this powerful algorithm