基于软干扰消除的MIMO-OFDM系统迭代检测算法

An Iterative Detection Scheme for MIMO-OFDM Systems

提出了一种新颖MIMO-OFDM系统的迭代检测方案,该方案充分利用了系统提供的频率和空间分集.通过在迭代处理中使用外部信息来利用由rich-scattering环境所提供的空间频率分集,来获得理想的系统容量.为了进一步提高系统性能,又提出了一种基于软干扰消除的检测算法.分析和仿真结果表明,新提出的接收机方案获得了很好的性能.

MIMO-OFDM system is a promising scheme for achieving high data rates over the future broadband wireless networks. For traditional MIMO-OFDM, the frequency diversity is not fully utilized. In this paper a novel iterative detection scheme for the MIMO-OFDM system which exploits both frequency and spatial diversity is proposed. Through iterative processing, the extrinsic information can be used to exploit the spatial-frequency diversity of the rich scattering environment, thereby achieving the capacity limit of the system. And for further improvement of the system's performance, a soft interference cancellation based receiver is presented, too. The analysis and simulation results show that the proposed detection scheme achieves an enhanced performance.