基于压缩感知的电力线通信脉冲噪声抑制方法

Impulse Noise Mitigation of Power Line Communication Based on Compressed Sensing

针对低压电力线通信系统脉冲噪声抑制性能不佳的问题,提出一种基于压缩感知的脉冲噪声抑制方法。该方法基于压缩感知对OFDM信号零子载波数据进行观测,利用正交匹配追踪重构脉冲噪声,通过最小二乘精确估计脉冲噪声幅值。实验结果表明,该方法能够有效抑制电力线通信脉冲噪声,性能优于非线性去噪和传统压缩感知方法。

Aiming at the poor performance of impulse noise suppression in low voltage power line communication system,a method of impulse noise suppression based on improved compressed sensing is proposed.Zero subcarrier data of OFDM signal are observed based on the compressed sensing.The impulse noise is reconstructed by orthogonal matching pursuit.The impulse noise amplitude is estimated accurately by the least square method.Experimental results show that the proposed method can effectively suppress the impulse noise of power line communication,and its performance is better than that of nonlinear denoising and traditional compressed sensing methods.