【摘要】 针对用于多输入多输出(MIMO)通信系统检测的按序 QR 分解(SQRD)算法在多径瑞利慢衰落信道中检测误码率较高的不足,提出了一种基于列正交(CO)变换的串行干扰消除(SIC)算法——COSIC。该算法对信道矩阵按列正交变换,避免了求上三角矩阵的运算,并且在判决信号过程中,将先判决出的信号通过信道后的输出向量作为干扰进行消除,在略微增加系统时间复杂度的基础上,使系统检测性能得到了明显改善。在多散射物的无线通信环境下进行的仿真实验证实,与传统的 SQRD 算法相比,所提算法误码率显著下降,系统检测性能明显改善。更多还原

【Abstract】 In view of the fact that the sorted QR decomposition (SQRD) algorthm for multiple input multiple output (MIMO) communication detection has a higher bit error rate when working in multi-path Rayleigh slow fading channels,the paper proposes a serial interference cancellation (SIC) algorithm for MIMO detection based on column orthogonal (CO) trans- form,named COSIC.The COSIC algorithm transforms the channel matrix column orthogonally to avoid solving the upper triangular matrix.In the processing of judging signals,it takes the output of the judged signals which are transmitted by the channel matrix as interference to cancel and the detection performance is improved distinctly on the basis of increasing system time complexity a little.The results of the simulation experiment performed under the environment of multiple scattering wireless communication show that compared to the SQRD algorithm,the bit error rate and the detection perfor- mance of the proposed algorithm are improved dramatically.更多还原