Spectral efficiency evaluation of generalized selection combiners (GSC) over slow fading with estimation errors

Fawaz S. Al-Qahtani, Arun K. Gurung, Salam A. Zummo, Zahir M. Hussain

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this paper we derive closed-form expressions for the single-user capacity of generalized selection combiners (GSC) system, taking into account the effect of imperfect channel estimation at the receiver. The channel considered is a slowly varying spatially independent flat Rayleigh fading channel. The complex channel estimate and the actual channel are modelled as jointly Gaussian random variables with a correlation that depends on the estimation quality. Two adaptive transmission schemes are analyzed: 1) optimal power and rate adaptation; and 2) constant power with optimal rate adaptation, including derivation of an upper bound and asymptotically tight approximations at high and low SNR regions. Our numerical results show the effect of Gaussian channel estimation error on the achievable spectral efficiency.

Original languageEnglish
Title of host publication2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Print)9781424451234
StatePublished - 2009

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC


  • Channel estimation error
  • Fading channels
  • Generalized selection combiner (GSC)
  • Spectral efficiency

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Spectral efficiency evaluation of generalized selection combiners (GSC) over slow fading with estimation errors'. Together they form a unique fingerprint.

Cite this