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  • Research Article
  • Open Access

Optimal Training for Time-Selective Wireless Fading Channels Using Cutoff Rate

EURASIP Journal on Advances in Signal Processing20062006:047245

https://doi.org/10.1155/ASP/2006/47245

  • Received: 1 June 2005
  • Accepted: 13 January 2006
  • Published:

Abstract

We consider the optimal allocation of resources—power and bandwidth—between training and data transmissions for single-user time-selective Rayleigh flat-fading channels under the cutoff rate criterion. The transmitter exploits statistical channel state information (CSI) in the form of the channel Doppler spectrum to embed pilot symbols into the transmission stream. At the receiver, instantaneous, though imperfect, CSI is acquired through minimum mean-square estimation of the channel based on some set of pilot observations. We compute the ergodic cutoff rate for this scenario. Assuming estimator-based interleaving and -PSK inputs, we study two special cases in-depth. First, we derive the optimal resource allocation for the Gauss-Markov correlation model. Next, we validate and refine these insights by studying resource allocation for the Jakes model.

Keywords

  • Resource Allocation
  • Fading Channel
  • Channel State Information
  • Pilot Symbol
  • Doppler Spectrum

Authors’ Affiliations

(1)
The Army Research Laboratory, Adelphi, MD 20783, USA
(2)
Department of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14850, USA

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Copyright

© Saswat Misra et al. 2006

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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