Aiming at the research of"how to improve the accuracy and stability of channel estimation"in mari-time wireless communication technology,an improved LS channel estimation algorithm is proposed to solve the problem that the traditional LS channel estimation algorithm in maritime OFDM communication system has the problems of frequency domain leakage and noise interference,which will lead to the degradation of the estimation accuracy and affect the quality and reliability of the communication.The algorithm firstly adds a window in the frequency domain to the response obtained at the pilot frequency to reduce the effect of frequency domain leak-age,and then separates the signal noise by using IDFT to perform threshold noise reduction in the time domain,and then optimizes the process by using the joint estimation algorithm of neighboring channels after the DFT re-turns to the frequency domain.The experimental results show that compared with the traditional LS channel esti-mation algorithm,the improved algorithm has smaller estimation error and better stability and robustness.
关键词
海上通信/正交频分复用/信道估计/加窗处理/门限阈值降噪
Key words
maritime communication/orthogonal frequency division multiplexing/channel estimation/plus window processing/threshold noise reduction
维普
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