一種基于ML算法及盲信道識(shí)別的DWPM系統(tǒng)
A Novel DWPM System Based on ML Algorithm and Blind Channel Identification
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摘要: 該文提出了一種基于ML算法及盲信道估計(jì)的離散小波包調(diào)制(Discrete Wavelet Packet Modulation,DWPM)系統(tǒng).本文通過(guò)基于導(dǎo)頻信號(hào)的盲信道識(shí)別方法,獲得信道的狀態(tài)信息,并且利用基于ZF(Zero Forcing)算法的H矩陣消除碼間干擾,最后,利用ML(Maximum Likelihood)算法檢測(cè)解調(diào)后的碼元,并且通過(guò)仿真分析了該系統(tǒng)在多徑衰落信道下的性能.仿真結(jié)果表明,該系統(tǒng)的性能要比傳統(tǒng)的OFDM系統(tǒng)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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