Performance analysis of multi‐pair two‐way amplify‐and‐forward relaying with imperfect CSI over Ricean fading channels. Issue 3 (15th February 2018)

• Record Type: Journal Article
• Authors: Sun, Xiaoli; Xu, Kui; Xu, Youyun
• Is Part Of: IET communications. Volume 12:Issue 3(2018)
• Page Start: 261
• Page End: 270
• Publication Date: 2018-02-15
• Subjects: radiofrequency interference -- wireless channels -- diversity reception -- relay networks (telecommunication) -- Rician channels -- amplify and forward communication; multipair two‐way amplify‐and‐forward relaying performance analysis -- imperfect CSI -- Ricean fading channel -- spectral efficiency -- energy efficiency -- multipair two‐way massive multiple input multiple output amplify‐and‐forward relaying system -- maximum‐ratio combining‐maximum ratio transmission beamforming matrices -- zero‐forcing transmission‐zero‐forcing reception beamforming matrices -- imperfect channel state information -- asymptotic signal‐to‐interference‐plus‐noise ratio expressions -- power scaling schemes -- asymptotic SE -- EE -- line‐of‐sight components -- Ricean K‐factor -- perfect CSI; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2016.1437
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : This study investigates the spectral efficiency (SE) and energy efficiency (EE) of a multipair two‐way massive multiple‐input multiple‐output amplify‐and‐forward relaying system over Ricean fading channels. Both maximum‐ratio combining/maximum ratio transmission and zero‐forcing transmission/zero‐forcing reception beamforming matrices are considered at the relay with imperfect channel state information (CSI). The asymptotic signal‐to‐interference‐plus‐noise ratio expressions (in the number of relay antennas M ) are derived. Moreover, four power scaling schemes are proposed and the asymptotic SE and EE based on the proposed power scaling schemes are obtained analytically. Theoretical analyses and simulation results show that with imperfect CSI when M tends to infinity, the transmit power should be scaled down to different proportions for the Ricean channel with and without line‐of‐sight components to maintain a desirable rate. However, when M tends to infinity, SE is independent of the Ricean K ‐factor with perfect CSI.