Open AccessJoint Design of Physical-layer Network Coding and LDPC Code Modulated by 2FSK
Author(s) -
Xie Ling-yun,
Meng Tang,
Haihua Li,
Chen Qing-hao,
Taibin Fang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1792/1/012078
Subject(s) - low density parity check code , computer science , bit error rate , linear network coding , coding gain , tanner graph , algorithm , decoding methods , relay , code rate , phase shift keying , transmission (telecommunications) , coding (social sciences) , electronic engineering , mathematics , telecommunications , computer network , statistics , network packet , engineering , power (physics) , physics , error floor , quantum mechanics
In order to improve the transmission efficiency in wireless communication and reduce the bit error rate in the transmission process, a physical-layer network coding(PNC) system with 2FSK modulation and low-density parity check(LDPC) codes as the channel coding is established, and a relay detection scheme for the system is designed. This scheme first obtains the waveform diagram of the signal in the network encoding process. According to the characteristics of 2FSK modulation, and then we can extracts the prior probability soft information by the waveform characteristics, and finally we can combine the log likelihood ratio belief propagation(LLR-BP) algorithm to complete the decoding and relay mapping process. The simulation results show that the system adopts 2FSK modulation and has superior bit error rate performance compared with BPSK modulation. After introducing low-density parity check(LDPC) codes, the system can ensure high-speed transmission of information while effectively improving system Bit error ratio performance.