Limited feedback for multicarrier block fading channels: A rate distortion approach

Manish Agarwal*, Dongning Guo, Michael L. Honig

*Corresponding author for this work

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

3 Scopus citations

Abstract

This paper studies power loading in a multicarrier system with channel state feedback of no more than one bit per sub-channel. Full channel state information is assumed known at the receiver. A simple model with parallel two-state (good/bad) memoryless sub-channels is considered first, where feedback is used to select a given fraction of sub-channels to activate. The optimal feedback scheme is the solution to a vector quantization problem, the performance of which is characterized by a rate distortion function in the limit of infinite number of sub-channels. Bounds for performance loss with finite number of sub-channels are also developed. We then consider a second model of a bank of block Rayleigh fading sub-channels with total power constraint, where the feedback describes which sub-channels to activate with equal power. A scheme based on rate distortion code is proposed to describe which sub-channels exceed a threshold in signal-tonoise ratio and should be activated. With optimized threshold and moderate amount of feedback, the resulting capacity is known to be of the same order in the number of sub-channels as that achieved by water-filling with full channel state information at the transmitter. This scheme performs more favorably than alternative schemes based on channel state reduction (such as by grouping them) and subsequent entropy coding.

Original languageEnglish (US)
Title of host publicationProceedings - 2009 IEEE Information Theory Workshop on Networking and Information Theory, ITW 2009
Pages81-85
Number of pages5
DOIs
StatePublished - Dec 1 2009
Event2009 IEEE Information Theory Workshop on Networking and Information Theory, ITW 2009 - Volos, Greece
Duration: Jun 10 2009Jun 12 2009

Publication series

NameProceedings - 2009 IEEE Information Theory Workshop on Networking and Information Theory, ITW 2009

Other

Other2009 IEEE Information Theory Workshop on Networking and Information Theory, ITW 2009
Country/TerritoryGreece
CityVolos
Period6/10/096/12/09

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems
  • Communication

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