一种减小误差传递的WIFI无线局域网中分层空时码检测算法

A Method of Suppress Interference Propagation for Layed Space Time Code Detection in WIFI Wireless LAN

由于分层空时码具有良好的频谱利用率和码速率,因此WIFI无线局域网系统中采用分层空时码。排序串行干扰信号检测算法具有良好的检测性能,但其译码复杂度很高。并行干扰消除算法虽然译码简单但其检测性能比较差。本文在并行干扰消除算法的基础上,提出了一种具有低复杂度且检测性能优良的算法。在WIFI无线信道A、B、F模型条件下仿真,结果表明,该算法具有良好的检测性能且复杂度最低。

The WIFI wireless LAN system using layered space time code because the layered space time codes have good spectrum utilization rate and code rate.Ordered serial interference cancellation algorithm has good detection performance,but its decoding complexity is very high.Parallel interference cancellation algorithm has lower decoding complexity,but its detection performance is bad.A impoved algorithm is gived based on parallel interference cancellation,which has not only lower decoding complexity but also has excellent detection performance.Under the condition of wireless channel model case A,B anc C in WIFI,this algorithm is simulated with MATLAB.The result shows that the improved algorithm has good detection performance and has lower decoding complexity.