RCPC编码MIMO系统的性能分析

Performance Analysis for RCPC Coded MIMO Systems

研究相关Nakagami-m衰落信道上宽带MIMOWCDMA系统下行链路使用2D-RAKE接收机和码率兼容删除卷积码(RCPC)的误码性能。假定宽带MIMO信道可用抽头延迟线来模拟并具有指数型多径强度轮廓。使用Q(x)的另一种数学表达式和特征函数,推导RCPC编码系统的精确成对差错概率和误码性能联合限。数值计算结果表明组合编码和空间路径分集技术能显著改善MI MOWCDMA系统的误码性能。

The error performance of rate-compatible punctured convolutional coding(RCPC),in combination with a two-dimensional(2D) RAKE receiver on the downlink of a MIMO WCDMA system in correlated Nakagami-m fading channels is investigated. The wideband MIMO channel can be modeled as a tapped delay line and an exponential multipath intensity profile(MIP)is assumed.Based on the alternative representations of Q(x) and characteristic function of SINR, the exact pairwise error probability of a RCPC coded system and union upper bound of error code performance are derived. Numerical results show that the combination of coding and spatial-path combining lead to dramatic error code performance improvement for MIMO WCDMA systems.