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针对OFDM(orthogonal frequency division multiplexing)系统中由于时变信道引入的载波间干扰消除问题,分析了MIMO-OFDM系统各接收天线频域中子载波上信号的信噪比,提出了一种基于子载波信噪比最优的联合时域干扰消除方法.分析表明,目标问题是一个广义Rayleigh熵问题,并且利用信道干扰矩阵主要能量分布在对角线的特点可以进一步减少算法的计算量.文中提出的干扰消除方法具有较好的性能,且对信道估计误差不敏感.
Aiming at the problem of eliminating the inter-carrier interference introduced by the time-varying channel in the OFDM (orthogonal frequency division multiplexing) system, the signal-to-noise ratio of the signal on the subcarriers in each receiving antenna of the MIMO-OFDM system is analyzed. And the best signal-to-noise ratio is proposed.The analysis shows that the target problem is a generalized Rayleigh entropy problem and the use of the diagonal energy distribution of the main energy distribution of the channel interference matrix can further reduce the computational complexity of the algorithm. The interference cancellation method has better performance and is insensitive to the channel estimation error.