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为了降低系统光多输入多输出(MIMO)系统的复杂度,提高系统的性能,介绍了迫零(ZF)检测算法、最小均方误差(MMSE)检测算法、最大似然(ML)检测算法在垂直分层空时编码(V-BLAST)光MIMO空时系统中的应用。从理论上对算法性能和复杂度进行研究,然后在MATLAB建立仿真模型,对多模光纤的传输函数进行仿真,结果表明在多模光纤链路中,ZF算法性能较低;MMSE算法较ZF算法有所改进;ML算法通过比较接收符号和原发送的符号之间的相似度,从而获得原符号的最小差错概率,其性能最好。
In order to reduce the complexity of the system and improve the performance of the system, this paper introduces the zero-forcing (ZF) detection algorithm, the minimum mean square error (MMSE) detection algorithm and the Maximum Likelihood (ML) Vertical Hierarchical Space-Time Coding (V-BLAST) Optical MIMO Space-Time Systems. The performance and complexity of the algorithm are theoretically studied. Then the simulation model is established in MATLAB and the transfer function of multimode fiber is simulated. The results show that the performance of the ZF algorithm is lower than that of the ZF algorithm The ML algorithm obtains the minimum error probability of the original symbol by comparing the similarity between the received symbol and the original symbol, which has the best performance.