Performance Analysis of Quasicyclic Low Density Parity Check Codes for Acoustic Communication System in Shallow Water

Abstract:

Based on the suitable channel model,an implementation of quasicyclic low density parity check codes(QCLDPC)for acoustic communication system in shallow water is demonstrated.The simulation of the application shows with the sumproduct algorithms,the almost equal performance to that of the random LDPC is obtained with less complexity of QCLDPC.Although the BER of QCLDPC in shallow water,which counteracts the violent interference of multipath signals,slightly declines with the decrease of the fading rate,the errorcorrection performance remains perfect.

Key words:QCLDPC; the channel in shallow water acoustic; sumproduct algorithms; multipath