Diversity of Coded Beamforming in MIMO-OFDM AF Relaying Systems with Direct Link

Han Bae Kong, Changick Song, Minki Ahn, Inkyu Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper investigates the diversity order of beamforming schemes in frequency-selective multiple-input multiple-output (MIMO) amplify-and-forward (AF) relaying channels with a nonnegligible direct link between the source and the destination. In this system, orthogonal frequency-division multiplexing and bit-interleaved coded modulation schemes are adopted to exploit multipath diversity. Due to a nonconvex property of the problem, the optimal performance of flat-fading MIMO relaying channels, which is imperative to derive the diversity order, is still unknown. To this end, we first identify upper and lower bounds of the signal-to-noise ratio (SNR) of the flat-fading channels, which lead to upper and lower bounds of diversity order of coded beamforming in frequency-selective channels. Then, we establish the diversity order as a closed form by showing that these bounds are tight. In addition, our analysis provides an insightful guideline for code constructions to achieve a proper diversity gain of the system. The accuracy of our analysis is validated through simulation results.

Original languageEnglish
Article number6906260
Pages (from-to)3817-3822
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Volume64
Issue number8
DOIs
Publication statusPublished - 2015 Aug 1

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Amplify-and-forward
Beamforming
Orthogonal Frequency Division multiplexing (OFDM)
Multiple-input multiple-output (MIMO)
Orthogonal frequency division multiplexing
Fading channels
Signal to noise ratio
Modulation
Upper and Lower Bounds
Bit-interleaved Coded Modulation (BICM)
Diversity Gain
Multipath
Fading Channels
Fading
Closed-form
Unknown
Simulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Aerospace Engineering
  • Automotive Engineering
  • Computer Networks and Communications
  • Applied Mathematics

Cite this

Diversity of Coded Beamforming in MIMO-OFDM AF Relaying Systems with Direct Link. / Kong, Han Bae; Song, Changick; Ahn, Minki; Lee, Inkyu.

In: IEEE Transactions on Vehicular Technology, Vol. 64, No. 8, 6906260, 01.08.2015, p. 3817-3822.

Research output: Contribution to journalArticle

Kong, Han Bae ; Song, Changick ; Ahn, Minki ; Lee, Inkyu. / Diversity of Coded Beamforming in MIMO-OFDM AF Relaying Systems with Direct Link. In: IEEE Transactions on Vehicular Technology. 2015 ; Vol. 64, No. 8. pp. 3817-3822.
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