On performance of cooperative OFDM/TDM with frequency-domain equalization in a multipath wireless channel

Amir Ligata, Haris Gacanin, Fumiyuki Adachi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cooperative transmission, where spatially distributed users form a multi-antenna system and assist in forwarding the information from source to destination node, achieves the diversity gain of a multiple-input multiple-output (MIMO) system. Cooperative network based on OFDM has been proposed to cope with the channel frequency-selectivity but due to high peak-to-average power ratio (PAPR) of OFDM, expensive power amplifier are required. In this paper, we present cooperative network based on OFDM combined with time division multiplexing (OFDM/TDM) using minimum mean square error frequency-domain equalization (MMSE-FDE) in a frequency-selective fading channel. We theoretically analyze the network performance with respect to the bit error rate (BER). The conditional signal-to-interference plus noise ratio (SINR) expressions are derived based on Gaussian approximation of the residual inter-slot interference (ISI) after MMSE-FDE for the given set of channel gains. The average BER performance for OFDM/TDM is evaluated by Monte-Carlo numerical computation method using the derived theoretical expressions and confirmed by computer simulation. The results show that the lower BER is achieved with cooperative OFDM/TDM in comparison with OFDM based cooperative network because OFDM/TDM exploits both cooperative and frequency diversity gains.

Original languageEnglish
Title of host publication17th Asia Pacific Conference on Communications, APCC 2011
Pages665-670
Number of pages6
DOIs
Publication statusPublished - 2011 Dec 1
Event17th Asia Pacific Conference on Communications, APCC 2011 - Kota Kinabalu, Sabah, Malaysia
Duration: 2011 Oct 22011 Oct 5

Publication series

Name17th Asia-Pacific Conference on Communications, APCC 2011

Other

Other17th Asia Pacific Conference on Communications, APCC 2011
CountryMalaysia
CityKota Kinabalu, Sabah
Period11/10/211/10/5

Keywords

  • Cooperative networking
  • MMSE-FDE
  • OFDM/TDM
  • theoretical analysis

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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