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Adaptive bit loading for multi-relay cooperative orthogonal frequency division multiple with imperfect channel estimation

Adaptive bit loading for multi-relay cooperative orthogonal frequency division multiple with imperfect channel estimation

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  • Author(s): O. Amin 1 ; S.S. Ikki 2 ; M. Uysal 3
    • View affiliations
    • Affiliations: 1: Department of Electrical Engineering, Assiut University, Assiut, Egypt
      2: Department of Electrical Engineering, INRS, Montreal, Canada and SNCS Research Center, University of Tabuk, Tabuk, Saudi Arabia
      3: Faculty of Engineering, Özyeğin University, Istanbul, Turkey
  • Source: Volume 6, Issue 12, 14 August 2012, p. 1821 – 1828
    DOI:  10.1049/iet-com.2011.0387 , Print ISSN 1751-8628, Online ISSN 1751-8636
© The Institution of Engineering and Technology
Published

In this study, the authors introduce an adaptive bit loading scheme for an amplify-and-forward orthogonal frequency division multiple cooperative system with relay selection. The proposed bit loading scheme maximises the throughput for a target error rate taking into account the quality of imperfect channel estimation. It relies on estimated channel state information (CSI) at the destination node and partial CSI (which involves the number of loaded bits) at the source node. The authors provide extensive Monte Carlo simulation results to demonstrate the throughput and the no-transmission probability performance of the proposed scheme and discuss the effect of various system and channel parameters on the performance.

Inspec keywords: Monte Carlo methods; channel estimation; amplify and forward communication; OFDM modulation; cooperative communication

Other keywords: CSI estimation; Monte Carlo simulation; target error rate; adaptive bit loading; relay selection; multirelay cooperative orthogonal frequency division multiple; channel state information estimation; amplify-and-forward orthogonal frequency division multiple cooperative system; imperfect channel estimation

Subjects: Radio links and equipment; Communication channel equalisation and identification; Monte Carlo methods; Modulation and coding methods

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