Performance analysis of two-way AF relaying system with the presence of hardware impairments over Nakagami-mfading channels


UÇAR GÜL M., Namdar M., Basgumus A.

IET COMMUNICATIONS, vol.14, no.15, pp.2618-2627, 2020 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 15
  • Publication Date: 2020
  • Doi Number: 10.1049/iet-com.2019.0839
  • Journal Name: IET COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Business Source Elite, Business Source Premier, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.2618-2627
  • Keywords: Monte Carlo methods, fading channels, diversity reception, decode and forward communication, error statistics, relay networks (telecommunication), Rayleigh channels, probability, amplify and forward communication, Nakagami channels, performance analysis, hardware impairments, Nakagami-m fading channels, symbol error rate performances, nonideal variable gain single relay, hardware distortions, receiver sides, instantaneous end-to-end signal-to-noise, -distortion ratios, algebraic expressions, two-way relaying system, Nakagami-m fading environments, closed-form expression, asymptotic outage probability, high signal-to-noise regime, derived statistics, transmitter-relay-receiver channels, approximate capacity, upper bound ergodic capacity, generic mathematical expressions, asymptotic SER, derived analytical expressions, authors, HW impairments, system performance, WIRELESS NETWORKS, GAIN, EFFICIENCY, IMPACT, LIMITS

Abstract

The authors evaluate theoutage probability, ergodic capacity, and symbol error rate (SER) performances of an amplify-and-forward relaying system equipped with a non-ideal variable gain single relay with hardware (HW) distortions at both the transmitter and receiver sides with the derivations of the instantaneous end-to-end signal-to-noise-and-distortion ratios. More specifically, they analytically derive new algebraic expressions for the outage probability and ergodic capacity in the two-way relaying system over the Nakagami-mfading environments. They further derive new closed-form expressions for the asymptotic outage probability to analyse the performance in the high signal-to-noise regime. The derived statistics, along with the transmitter-relay-receiver channels are then used to obtain a closed-form expression of the approximate and upper bound ergodic capacity. Finally, they investigate the generic mathematical expressions utilising the average and asymptotic SER, valid for several types of modulation schemes operating over the Nakagami-mfading. Monte Carlo simulations and numerical examples are provided to quantify the validity of the derived analytical expressions. The authors' results highlight the effect of HW impairments in the two-way relaying system over the Nakagami-mfading channels and reveal the impact of the level of HW impairments, data rates, modulation types, and shaping parameters on the overall system performance.