Performance analysis and design of quasi-cyclic LDPC codes for underwater magnetic induction communications

Magnetic induction (MI) communication is an effective scheme for underwater wireless communica-tion. In this paper, we aim to design an underwater MI communication system based on Quasi-cyclic LDPC (QC-LDPC) codes. Firstly, for a given QC-LDPC code used in underwater MI communication, we propose a novel algorithm to evaluate its performance, which is named as underwater magnetic induction protograph (UWMIP) extrinsic information transfer algorithm. Furthermore, we present a differential evolution UWMIP (DE-UWMIP) algorithm, which incorporates the differential evolution method and the UWMIP algorithm. By this algorithm, we search the optimized QC-LDPC codes with best distance threshold. Simulation results show that the proposed algorithm is effective and provide a good guidance to design the underwater MI communication system. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

This paper designs an underwater MI communication system based on Quasi-cyclic LDPC (QC-LDPC) codes. It proposes a novel algorithm named underwater magnetic induction protograph (UWMIP) extrinsic information transfer algorithm to evaluate the performance of the given QC-LDPC code. Additionally, a differential evolution UWMIP (DE-UWMIP) algorithm is presented to search for optimized QC-LDPC codes with the best distance threshold. Simulation results demonstrate the effectiveness of the proposed algorithm and its application in designing the underwater MI communication system.