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对数正态误差恒模算法误差曲线收敛速度快,但均方误差较大。针对这一问题,提出了改进的对数正态误差恒模算法,并将此算法应用于按序串行干扰消除MIMO判决反馈算法中。利用改进的对数正态误差恒模算法来得到前馈数据向量并将其合并到反馈数据向量中,然后按序将已检测并判决出的信号进行消除,避免了已判决出的信号对接收数据向量的干扰。在多散射物的无线通信环境下进行仿真,结果表明与迭代最小二乘按序判决反馈算法相比,所提算法检测性能提高,误码率显著下降。
The logarithm normal error constant modulus error curve converges fast, but the mean square error is larger. In order to solve this problem, an improved logarithmic normal error constant modulus algorithm is proposed, and the algorithm is applied to sequential serial interference cancellation MIMO decision feedback algorithm. The improved forward logarithm normal error constant modulus algorithm is used to obtain the feedforward data vector and combine them into the feedback data vector, and then the detected and determined signals are eliminated sequentially to avoid the signal received Data vector interference. The simulation results show that the performance of the proposed algorithm is improved and the bit error rate is significantly reduced compared with the iterative least-squares ordered decision feedback algorithm in the multi-scatterers environment.