Asymptotic ergodic capacity analysis for MIMO amplify-and-forward relay networks

Kyoung Jae Lee, Jin Sung Kim, Giuseppe Caire, Inkyu Lee

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

In this letter, we analyze asymptotic ergodic capacity of MIMO amplify-and-forward (AF) relaying systems which employ linear processing at the relay. By exploiting the asymptotic results for eigenvalue distributions, we derive the ergodic capacity in various asymptotic antenna regimes as a closed-form expression with arbitrary system parameters. The analyzed results demonstrate that increasing the number of source antennas causes the capacity shrink phenomenon which is analogous to the channel hardening effect in multi-user MIMO systems. Although we assume asymptotically large antennas to obtain the closed-form expressions, simulation results show that our derived expressions are surprisingly accurate even with the moderate number of antennas, and thus can serve for analyzing practical MIMO relay networks.

Original languageEnglish
Article number5529756
Pages (from-to)2712-2717
Number of pages6
JournalIEEE Transactions on Wireless Communications
Volume9
Issue number9
DOIs
Publication statusPublished - 2010 Sep

Keywords

  • Multiple antennas
  • ergodic capacity
  • relay

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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