Research Article
Performance enhancement of Dicode Pulse Position Modulation System by means of LDPC code
@INPROCEEDINGS{10.4108/eai.7-9-2021.2314935, author={Yasmeen M. Hussein and Basman M. Al-Nedawe and Ammar Hussein Mutlag}, title={Performance enhancement of Dicode Pulse Position Modulation System by means of LDPC code}, proceedings={Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey}, publisher={EAI}, proceedings_a={IMDC-IST}, year={2022}, month={1}, keywords={dicode pulse position modulation (dippm); forward error correction (fec) code; low-density parity-check (ldpc); log-likelihood ratio (llr); bandwidth consumption issue}, doi={10.4108/eai.7-9-2021.2314935} }- Yasmeen M. Hussein
Basman M. Al-Nedawe
Ammar Hussein Mutlag
Year: 2022
Performance enhancement of Dicode Pulse Position Modulation System by means of LDPC code
IMDC-IST
EAI
DOI: 10.4108/eai.7-9-2021.2314935
Abstract
Several types of Pulse Position Modulation (PPM) formats were proposed as coding schemes for optical communication such as Differential Pulse Position Modulation (DPPM) and Multiple Pulse Position Modulation (MPPM). However, these coding schemes result in a large bandwidth expansion factor that deduces an excessively high final data rate. On the other hand, Dicode Pulse Position Modulation (DiPPM) is an unconventional coding scheme that has superior characteristics beyond the PPMs proposed. More specifically, DiPPM has been developed to resolve the bandwidth consumption issue of PPM formats. For the first time, this study intends to overcome the DiPPM errors issue via the implication of forwarding Error Correction (FEC). In this regard, low-density parity-check (LDPC) is used in conjunction with multi-level coding, multi-stage encoding, and trellis-based signal shaping to create a bandwidth-efficient modulation format. The optimum code rates for different fibre normalised bandwidths of maximum transmission efficacy will be investigated.
