Open AccessReceived response based heuristic LDPC code for short-range non-line-of-sight ultraviolet communication
Author(s) -
Heng Qin,
Yong Zuo,
Dong Zhang,
Yinghui Li,
Jian Wu
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.005018
Subject(s) - non line of sight propagation , low density parity check code , computer science , algorithm , forward error correction , optics , bit error rate , line code , electronic engineering , telecommunications , decoding methods , physics , bandwidth (computing) , baseband , wireless , engineering
Through slight modification on typical photon multiplier tube (PMT) receiver output statistics, a generalized received response model considering both scattered propagation and random detection is presented to investigate the impact of inter-symbol interference (ISI) on link data rate of short-range non-line-of-sight (NLOS) ultraviolet communication. Good agreement with the experimental results by numerical simulation is shown. Based on the received response characteristics, a heuristic check matrix construction algorithm of low-density-parity-check (LDPC) code is further proposed to approach the data rate bound derived in a delayed sampling (DS) binary pulse position modulation (PPM) system. Compared to conventional LDPC coding methods, better bit error ratio (BER) below 1E-05 is achieved for short-range NLOS UVC systems operating at data rate of 2Mbps.