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以无线通信中的快时变信道为对象,使用基扩展模型估计快变信道参数,并对多种基扩展模型进行性能分析;研究多普勒频移对基扩展模型准确度的影响;探讨并改进了构建多径瑞利信道的方法;讨论了信号通过多径时变瑞利信道的处理方法;搭建了OFDM通信仿真系统,并分别用LS法、LMMSE法、SVD法设计了基于块状导频技术估计的信道均衡器.
Based on the fast time-varying channel in wireless communication, this paper uses the base extension model to estimate fast channel parameters and analyzes the performance of various base extension models. The influence of Doppler shift on the accuracy of base extension model is discussed. The method of constructing multi-path Rayleigh channel is improved. The processing method of signal through multi-path time-varying Rayleigh channel is discussed. The simulation system of OFDM communication is established, and the LS-guided method, LMMSE method and SVD method are respectively used to design the block- Channel Equalizer for Frequency Estimation.