MIMO系统中格点减少检测算法研究

摘要

在实际通信系统中,较差的信道环境会给接收端的信号检测带来较大难度.为进一步提高恶略环境中信号检测的性能,给出了一种结合格点减少的MMSE-SIC检测算法,通过在格点减少的基础上引入最小均方误差(MMSE)准则以及连续干扰抵消(SIC)的思想,能够仅以多项式的复杂度接近最优检测算法(最大似然,ML)的性能,并且可以通过采用QR分解进一步降低格点减少算法的复杂度.仿真结果表明,在未编码系统中采用基于格点减少的MMSE-SIC算法能够显著提高MIMO系统的误码性能.%Signal detection in receiver will be much more complex because of bad condition of actual communication systems.This letter adopted lattice-reduction-aided schems to the mmse criterion here to enhance the performance of detection in such ystems.The performance could easily reach near-maximum-likelihood detection performance just with complexity of multinonmial, and the complexity of the algorithm would be even lower according to adopting QR decomposition.Results of emulations show that error performance of MIMO systems without coding will be improved through lattice-reduction-aided MMSE-SIC algorithm.