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    Suzhou Electric Appliance Research Institute
    期刊號: CN32-1800/TM| ISSN1007-3175

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    一種基于非線性GPR模型的低壓電力線信道估計算法

    來源:電工電氣發布時間:2021-08-18 12:18 瀏覽次數:572

    一種基于非線性GPR模型的低壓電力線信道估計算法

    李思維,楊國華,柳勇,邢瀟文
    (寧夏大學 物理與電子電氣工程學院,寧夏 銀川 750021)
     
        摘 要:針對信號在低壓電力線載波通信信道傳輸的過程中容易受到非線性脈沖噪聲干擾,從而造成信號的頻率選擇性衰落,導致信號誤碼率高的問題,提出了一種改進最小平方-高斯過程回歸 (LS-GPR) 的信道估計算法,并進行了非線性脈沖干擾消除的迭代實驗,在存在脈沖干擾的條件下對算法的誤碼率進行了仿真計算。結果表明,該改進算法能夠較大程度地消除脈沖噪聲所帶來的影響,在低信噪比的情況下有效降低了系統的誤碼率,具有良好的信道估計性能。
        關鍵詞:電力線載波通信;信道估計;高斯過程回歸;脈沖干擾消除
        中圖分類號:TM726     文獻標識碼:A     文章編號:1007-3175(2021)08-0001-05
     
    A Channel Estimation Algorithm for Low-Voltage Power Line
    Based on Nonlinear GPR Model
     
    LI Si-wei, YANG Guo-hua, LIU Yong, XING Xiao-wen
    (School of Physics and Electronic-Electrical Engineering, Ningxia University, Yinchuan 750021, China)
        Abstract: Signals are susceptible to interfered by non-linear impulse noise during transmission in the low-voltage power line carrier communication channel, which could cause signals a frequency selective fading even a high bit error rate. To solve this problem, an improved channel estimation algorithm is proposed in this paper that is based on the improved LS-GPR (Least Square-Gaussian Processes Regression).Iteration experiments of non-linear pulse interference elimination are carried out to test the bit error rate performance of this algorithm under impulse interference. The results indicated that the improved algorithm can eliminate the interference from impulse noise at a large extend,and can effectively decrease the bit error rate under a low signal-to-noise ratio, in short, a good performance on channel estimation.
        Key words: power line carrier communication; channel estimation; Gaussian processes regression; pulse interference elimination
     
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