Performance of a Multiple-Access DCSK-CC System over Nakagami-$m$ Fading Channels

TL;DR

This paper introduces a cooperative multiple-access DCSK system with decode-and-forward protocol over Nakagami-m channels, demonstrating significant BER improvements and comparable throughput to non-cooperative systems through theoretical and simulation analyses.

Contribution

It presents a novel cooperative DCSK system with decode-and-forward protocol, enhancing BER performance over Nakagami-m fading channels, and provides comprehensive theoretical and simulation validation.

Findings

Significant BER performance improvement over existing systems.

Throughput approximately matches non-cooperative DCSK system.

Theoretical analyses align with simulation results.

Abstract

In this paper, we propose a novel cooperative scheme to enhance the performance of multiple-access (MA) differential-chaos-shift-keying (DCSK) systems. We provide the bit-error-rate (BER) performance and throughput analyses for the new system with a decode-and-forward (DF) protocol over Nakagami-$m$ fading channels. Our simulated results not only show that this system significantly improves the BER performance as compared to the existing DCSK non-cooperative (DCSK-NC) system and the multiple-input multiple-output DCSK (MIMO-DCSK) system, but also verify the theoretical analyses. Furthermore, we show that the throughput of this system approximately equals that of the DCSK-NC system, both of which have prominent improvements over the MIMO-DCSK system. We thus believe that the proposed system can be a good framework for chaos-modulation-based wireless communications.