不完全信道状态信息下的Turbo-BLAST系统及性能

Performance of Turbo-BLAST System with Imperfect Channel State Information

在Turbo-BLAST方案基础上,针对信道估计有误差情况,利用不完全的信道状态信息推导出等效噪声方差,然后提出一种改进的并行干扰抵消迭代检测算法.该算法对完全信道估计和信道估计有误差情况均有较好的适用性.实验结果表明,所提算法可以有效改善系统误比特率性能.

For the case of imperfect channel estimation, variance of equivalent noise is found with the imperfect channel state information. A modified iterative scheme of parallel interference cancellation is then proposed using the Turbo-BLAST scheme. The scheme is suited to the Turbo-BLAST system with perfect or imperfect channel state information. Simulation results show that the proposed scheme is effective in improving BER performance.