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提出了一种适合MIMO-OFDM系统的星座映射VBLAST迫零检测算法。该算法在接收端从整个发射星座空间中连续并循环映射,作为最先检测底层信号,以最大限度提高最先检测层的差错性能,再对余下接收信号采用传统ZF检测算法;最后,根据最大似然准则,确定最优一组检测信号作为译码结果。该算法主要克服ML算法复杂度高和单纯ZF算法性能差的缺点。仿真结果表明,该算法具有比ZF算法更优的性能,在误码率为10-3数量级上有3~4 dB的性能改善,且复杂度较低。
A constellation mapping VBLAST zero-forcing detection algorithm suitable for MIMO-OFDM system is proposed. The algorithm performs continuous and cyclic mapping from the entire transmitting constellation space at the receiving end as the first detection of the bottom signal to maximize the error performance of the first detection layer and then uses the traditional ZF detection algorithm for the remaining received signals. Finally, Likelihood criteria to determine the optimal set of detection signals as the decoding result. The algorithm mainly overcomes the shortcomings of high complexity of ML algorithm and poor performance of simple ZF algorithm. The simulation results show that the proposed algorithm has better performance than the ZF algorithm. The proposed algorithm has the performance improvement of 3 ~ 4 dB at the error rate of 10-3, and the complexity is low.