Blockwise amplify-and-forward relaying strategies for multipoint-to- multipoint MIMO networks

Jaesin Kim, Jeongho Hwang, Kyoung Jae Lee, Inkyu Lee

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In this letter, we consider a multipoint-to-multipoint transmission system which employs a single relay in wireless networks where all source, destination and relay nodes are equipped with multiple antennas. For amplify-and-forward relay systems, we propose new linear processing strategies for maximizing the sum rate performance by applying a blockwise relaying method combined with convex optimization techniques. To reduce a computational complexity, we first consider a zero-forcing based relay only optimization scheme, which generate a closed-form solution in a non-iterative fashion. In order to further improve the sum rate at low signal-to-noise ratio regimes, we additionally design an enhanced relay filter by exploiting the blockwise relaying method based on a minimum mean-square error criterion. Simulation results show that the proposed relay design strategies outperform the existing conventional schemes in terms of the sum rate.

Original languageEnglish
Article number5783010
Pages (from-to)2028-2033
Number of pages6
JournalIEEE Transactions on Wireless Communications
Volume10
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

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Amplify-and-forward
MIMO systems
Multiple-input multiple-output (MIMO)
Relay
Convex optimization
Mean square error
Computational complexity
Wireless networks
Signal to noise ratio
Antennas
Processing
Zero-forcing
Multiple Antennas
Combined Method
Minimum Mean Square Error
Convex Optimization
Closed-form Solution
Optimization Techniques
Wireless Networks
Strategy

Keywords

  • amplify-and-forward (AF) relay
  • blockwise relaying
  • Multiple-input multiple-output (MIMO)
  • sum rate maximization

ASJC Scopus subject areas

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

Cite this

Blockwise amplify-and-forward relaying strategies for multipoint-to- multipoint MIMO networks. / Kim, Jaesin; Hwang, Jeongho; Lee, Kyoung Jae; Lee, Inkyu.

In: IEEE Transactions on Wireless Communications, Vol. 10, No. 7, 5783010, 01.07.2011, p. 2028-2033.

Research output: Contribution to journalArticle

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