一种基于ML算法及盲信道识别的DWPM系统
A Novel DWPM System Based on ML Algorithm and Blind Channel Identification
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摘要: 该文提出了一种基于ML算法及盲信道估计的离散小波包调制(Discrete Wavelet Packet Modulation,DWPM)系统.本文通过基于导频信号的盲信道识别方法,获得信道的状态信息,并且利用基于ZF(Zero Forcing)算法的H矩阵消除码间干扰,最后,利用ML(Maximum Likelihood)算法检测解调后的码元,并且通过仿真分析了该系统在多径衰落信道下的性能.仿真结果表明,该系统的性能要比传统的OFDM系统的性能好.Abstract: A novel DWPM （Discrete Wavelet Packet Modulation） system with blind channel identification based on Maximum Likelihood （ML） algorithm is studied for multipath fading channel. The Channel State Information （CSI） is obtained with blind channel identification method and inter-symbol interference is suppressed by H matrix based on ZF （Zero Forcing） algorithm. Finally, the demodulated symbols are detected by ML algorithm. The performance of the system under the multipath fading channel is analyzed by simulation, The simulation results show the performance of the system is better than that of the traditional OFDM system.
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