A new method for constructing parity check matrix of QC-LDPC codes based on shortening RS codes for wireless sensor networks

作者：Zhang, Jian-bin; Yu, Yang^*; Chen, Zhu-yang; Li, Zhi-Zhen

来源：Sustainable Computing: Informatics and Systems , 2018, 18: 121-126.

DOI：10.1016/j.suscom.2017.09.001

• Low density parity check codes
• Wireless sensor networks
• Check matrix
• Cyclic permutation matrix
• Shortening RS codes

In this paper, a new method to construct parity check matrix of QC-LDPC codes based on shortening RS codes for wireless sensor networks (WSNs) is proposed. The proposed method constructs a basic matrix based on shortening RS codes with two information symbols, then expands the basic matrix optimally utilizing cyclic permutation matrix, so as to obtain the check matrix of quasi-cyclic regular LDPC codes in which the girth is 8 at least, and constructed LDPC codes have good minimum distances. Especially, the basic matrix and its expansion are both fully structured, so it is convenient for hardware implementation. The simulation results show that the QC-LDPC codes constructed by the proposed method have good BER performance and convenient for the hardware design and implementation. Moreover, the simulation results show that WSNs using the constructed QC-LDPC codes have good energy efficiency.

• 出版日期2018-6
• 单位南京航空航天大学; 江苏大学