Capacity for Spectrum Sharing Cognitive Radios with MRC Diversity and Imperfect Channel Information from Primary User

Ruifeng Duan*, Riku Jäntti, Mohammed Elmusrati, Reino Virrankoski

*Corresponding author for this work

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

Abstract

In this paper we study the capacity of spectrum sharing cognitive radios (CR) with Maximal Ratio Combining (MRC) diversity at the secondary receiver under Rayleigh fading. The secondary user does not have perfect channel information of SUtx-PUrx link, where the estimation error is considered. Our mathematical analysis and numerical results show not only that with MRC combining diversity at the secondary receiver more capacity is achieved, but also that the estimation error could be compensated. For instance, we show that even the estimation error variance is large, for example sigma(2) = 0.8, to increase the degrees of MRC combining diversity, for instance L = 8, is able to achieve more capacity than in estimation error free case sigma(2) = 0.

Original languageEnglish
Title of host publication2010 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE GLOBECOM 2010
PublisherIEEE
Number of pages5
ISBN (Print)978-1-4244-5638-3
DOIs
Publication statusPublished - 2010
MoE publication typeA4 Article in a conference publication
Event IEEE Global Telecommunications Conference - Miami, United States
Duration: 6 Dec 201010 Dec 2010

Publication series

NameIEEE Global Telecommunications Conference (Globecom)
PublisherIEEE
ISSN (Print)1930-529X

Conference

Conference IEEE Global Telecommunications Conference
Abbreviated titleGLOBECOM
CountryUnited States
CityMiami
Period06/12/201010/12/2010

Keywords

  • FADING ENVIRONMENTS
  • COMBINING TECHNIQUES
  • LIMITS
  • NETWORKS

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