Naslov
Design and Analysis of Multi-User Faster-Than- Nyquist-DCSK Communication Systems over Multi-Path Fading Channels

Autori
Dawa, Mohamed ; Herceg, Marijan ; Kaddoum, Georges

Kolaboracija
ETS, LaCIME Laboratory, University of Québe

Izvornik
Sensors (1424-8220) 22 (2022), 20; 7837-7837

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
chaos-based communication systems ; differential chaos shift keying ; Faster-Than-Nyquist ; interference ; multi-user ; sampling rate

Sažetak
In this paper, we present a new multi-user chaos- based communication system using Faster-than- Nyquist sampling to achieve higher data rates and lower energy consumption. The newly designed system, designated Multi-user Faster Than Nyquist Differential Chaos Shift Keying (MU-FTN-DCSK), uses the traditional structure of Differential Chaos Shift Keying (DCSK) communication systems in combination with a filtering system that goes below the Nyquist limit for data sampling. The system is designed to simultaneously enable transmissions from multiple users through multiple sampling rates resulting in semi-orthogonal transmissions. The design, performance analysis, and experimental results of the MU-FTN-DCSK system are presented to demonstrate the utility of the newly proposed system in enabling multi-user communications and enhancing the spectral efficiency of the basic DCSK design without the addition of new blocks. The MU-FTN-DCSK system presented in this paper demonstrates spectral gains for one user of up to 23% and a combined gain of 25% for four (U=4 ) users. In this paper, we present a proof of concept demonstrating a new degree of freedom in the design of Chaos-based communication systems and their improvement in providing wireless transmissions without complicated signal processing tools or advanced hardware designs.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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