Title: CDMA extension using STARRIS

Authors: Sami Touati; Rachid Sammouda; Musaed Alhussein

Addresses: Sat. Tech. Co., France ' Computer Engineering Department, College of Computer and Information Sciences, King Saud University, Riyadh, Saudi Arabia ' Computer Engineering Department, College of Computer and Information Sciences, King Saud University, Riyadh, Saudi Arabia

Abstract: In this paper, we extend the coverage of code division multiple access (CDMA) using simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STARRIS). The signal is broadcasted from the source S to the relay R using a CDMA link. Then, relay node R decodes the symbols of two users U_t and U_r and transmits the signal to them using STARRIS. We show that STARRIS with N = 8, 16, 32, 64, 128 elements offers up to 26, 34, 42, 50 and 58 dB versus CDMA in both first and second hop. CDMA using STARRIS offers 8 dB versus CDMA using RIS.

Keywords: code division multiple access; CDMA; rake receiver; STARRIS; reconfigurable intelligent surfaces; RIS; Rayleigh channels.

DOI: 10.1504/IJAHUC.2024.140657

International Journal of Ad Hoc and Ubiquitous Computing, 2024 Vol.47 No.1, pp.22 - 27

Received: 28 Feb 2024
Accepted: 10 May 2024
Published online: 29 Aug 2024 *

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