公开(公告)号：US11469777B2

公开(公告)日：2022-10-11

申请号：US17336717

申请日：2021-06-02

申请人： Zhejiang University

发明人： Lei Xie ,  Huifang Chen ,  Hongda Duan

IPC分类号： H03M13/11 ,  H03M13/00 ,  H04B11/00 ,  H04B13/02

摘要： The present disclosure provides a method for optimizing a protograph-based LDPC code over an underwater acoustic (UAW) channel. The traditional protograph-based LDPC code over an UAW channel does not consider performance in an error floor region. The method first determines parameters such as a protograph-based LDPC code length, a basic protograph, a target decoding threshold, a threshold adjustment factor, and an ACE check parameter. The protograph is optimized, and the method constructs a parity check matrix by using a UAW channel-based PEG/ACE hybrid algorithm, performs ACE check on the parity check matrix, and calculates a decoding threshold for the matrix passing the check. If the decoding threshold is within a range of an iterative decoding threshold, the parity check matrix is a final optimized matrix. Otherwise, the method continues to optimize the protograph until a parity check matrix passing the check is obtained.

公开(公告)号：US20210376858A1

公开(公告)日：2021-12-02

申请号：US17336717

申请日：2021-06-02

申请人： Zhejiang University

发明人： Lei XIE ,  Huifang Chen ,  Hongda Duan

IPC分类号： H03M13/11 ,  H03M13/00 ,  H04B11/00 ,  H04B13/02

摘要： The present disclosure provides a method for optimizing a protograph-based LDPC code over an underwater acoustic (UAW) channel. The traditional protograph-based LDPC code over an UAW channel does not consider performance in an error floor region. The method first determines parameters such as a protograph-based LDPC code length, a basic protograph, a target decoding threshold, a threshold adjustment factor, and an ACE check parameter. The protograph is optimized, and the method constructs a parity check matrix by using a UAW channel-based PEG/ACE hybrid algorithm, performs ACE check on the parity check matrix, and calculates a decoding threshold for the matrix passing the check. If the decoding threshold is within a range of an iterative decoding threshold, the parity check matrix is a final optimized matrix. Otherwise, the method continues to optimize the protograph until a parity check matrix passing the check is obtained.