Iterative Noise Suppression Method United with LDPC Decoding in Broadband Power Line Channel

In a broadband low voltage power line channel, the interference from channel noise is heavy and results in a poor communication performance. An iterative method integrating with the LDPC decoding is proposed to suppress the noise in broadband power line channel. When an LDPC decoding and an iterative noise suppression are combined, they can benefit each other, and further promote the communication performance. The LDPC decoder is introduced into the traditional iterative noise suppression algorithm to decode the equalized signal at a receiver, which can suppress the interfering noise effectively, increase the estimation accuracy for noise in the iterative process and then improve the noise suppression performance. The proposed method has a good performance for noise suppression and a fast convergence speed. The simulation experiments reveal the effectiveness of the proposed method.