Adaptive rate transmission for spectrum sharing system with quantized channel state information

Mohamed Abdallah, Ahmed Salem, Mohamed Slim Alouini, Khalid Qaraqe

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

6 Citations (Scopus)

Abstract

The capacity of a secondary link in spectrum sharing systems has been recently investigated in fading environments. In particular, the secondary transmitter is allowed to adapt its power and rate to maximize its capacity subject to the constraint of maximum interference level allowed at the primary receiver. In most of the literature, it was assumed that estimates of the channel state information (CSI) of the secondary link and the interference level are made available at the secondary transmitter via an infinite-resolution feedback links between the secondary/primary receivers and the secondary transmitter. However, the assumption of having infinite resolution feedback links is not always practical as it requires an excessive amount of bandwidth. In this paper we develop a framework for optimizing the performance of the secondary link in terms of the average spectral efficiency assuming quantized CSI available at the secondary transmitter. We develop a computationally efficient algorithm for optimally quantizing the CSI and finding the optimal power and rate employed at the cognitive transmitter for each quantized CSI level so as to maximize the average spectral efficiency. Our results give the number of bits required to represent the CSI sufficient to achieve almost the maximum average spectral efficiency attained using full knowledge of the CSI for Rayleigh fading channels.

Original languageEnglish
Title of host publication2011 45th Annual Conference on Information Sciences and Systems, CISS 2011
DOIs
Publication statusPublished - 2011
Event2011 45th Annual Conference on Information Sciences and Systems, CISS 2011 - Baltimore, MD, United States
Duration: 23 Mar 201125 Mar 2011

Other

Other2011 45th Annual Conference on Information Sciences and Systems, CISS 2011
CountryUnited States
CityBaltimore, MD
Period23/3/1125/3/11

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ASJC Scopus subject areas

  • Information Systems

Cite this

Abdallah, M., Salem, A., Alouini, M. S., & Qaraqe, K. (2011). Adaptive rate transmission for spectrum sharing system with quantized channel state information. In 2011 45th Annual Conference on Information Sciences and Systems, CISS 2011 [5766156] https://doi.org/10.1109/CISS.2011.5766156