Amplify-and-Forward MIMO Relaying with OSTBC over Nakagami-m Fading Channels

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Quang Trung Duong, Hans-Jürgen Zepernick, Theodoros A. Tsiftsis, Vo Nguyen Quoc Bao
Title: Amplify-and-Forward MIMO Relaying with OSTBC over Nakagami-m Fading Channels
Conference name: IEEE International Communications Conference (ICC'10)
Year: 2010
Publisher: IEEE
City: Cape Town, South Africa
ISI number: 000287029400173
Organization: Blekinge Institute of Technology
Department: School of Computing (Sektionen för datavetenskap och kommunikation)
School of Computing S-371 79 Karlskrona
+46 455 38 50 00
Authors e-mail:
Language: English
Abstract: In this paper, we analyze the performance of dual-hop channel state information (CSI)-assisted amplify-andforward (AF) cooperative networks using orthogonal space-time block codes (OSTBCs) over independent but not identically distributed Nakagami-m fading channels. Specifically, we present closed-form expressions of the outage probability (OP) and the symbol error probability (SEP). The analytical results are given in tractable forms which readily allow us to assess the performance of AF relay systems using OSTBCs. For sufficiently large signal-to-noise ratio, we obtain the asymptotic results for OP and SEP which reveal insights into the effect of fading factors on the diversity and coding gains. It has been shown that between the two hops the more severe link solely determines the diversity and coding gains. In particular, these two gains strictly depend on the fading severity parameters and the channel mean powers of the more rigorous hop, respectively. Numerical results are provided showing an excellent agreement between our analytical results and those of Monte-Carlo simulations for selected scenarios.
Subject: Signal Processing\General
Keywords: Nakagami-m, amplify-and-forward, MIMO, OSTBC, relay networks, cooperative communications