Reliable Spread Spectrum Communication Systems by Using Low-Density Parity-Check Codes

TL;DR

This paper proposes a joint channel coding and spectrum spreading scheme using LDPC codes, significantly improving BER performance without substantial complexity increase, leveraging spectrum spreading for noise protection.

Contribution

It introduces a novel joint scheme combining LDPC coding with spectrum spreading, enhancing performance while maintaining manageable complexity.

Findings

BER performance is significantly improved

Complexity does not increase substantially

Spectrum spreading provides effective noise protection

Abstract

A joint scheme for the channel coding and spectrum spreading communication system is proposed in this paper. The Bit Error Rate (BER) performance of the joint proposed scheme is evaluated and compared with the case of channel coding scheme without spectrum spreading. We employ a single Low-Density Parity Check (LDPC) code for the both channel coding and direct sequence spectrum spreading. We show that the BER performance is significantly improved while the complexity does not increase too. The philosophy behind this achievement is that the spectrum spreading techniques provide the ability of channel noise protection for the communication systems by themselves.