Title: ASER analysis of DF relay-assisted communication systems with diversity receivers at destinations subject to Nakagami-m fading channels

Authors: Rajkishur Mudoi; Darilangi S. Lyngdoh

Addresses: Department of Electronics and Communication Engineering, North-Eastern Hill University, Shillong, Meghalaya, 793022, India ' Department of Electronics and Communication Engineering, North-Eastern Hill University, Shillong, Meghalaya, 793022, India

Abstract: In recent years, relay-assisted communications have been extensively used for low-power and long-distance transmission of information. The average symbol error rate (ASER) performance of a decode and forward (DF) relay-assisted communication method is analysed using maximal ratio combining (MRC) as well as selection combining (SC) receivers at the destination node. All links in the wireless system are influenced by Nakagami-m fading distribution. The closed-form representation of ASER is derived using the moment generating function (MGF)-based approach for coherent as well as noncoherent modulation techniques. The results show an improvement in the ASER performance with the MRC receiver compared to the SC receiver at the destination node. The ASER performance improves with an enhancement of the fading parameter. The mathematical expressions are supported using computer simulations that confirm the correctness of the results.

Keywords: ASER; average symbol error rate; decode-and-forward; MRC; maximal ratio combining; MGF; Nakagami-m fading; selection combining.

DOI: 10.1504/IJAACS.2024.139384

International Journal of Autonomous and Adaptive Communications Systems, 2024 Vol.17 No.4, pp.318 - 333

Received: 21 Feb 2022
Accepted: 04 Jul 2022
Published online: 02 Jul 2024 *

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