Channel sensing and estimation in cognitive relay networks

Gozde Ozcan, M. Cenk Gursoy

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

2 Scopus citations

Abstract

A cognitive relay system in which a cognitive secondary source seeks to communicate with a secondary destination via an amplify-and-forward (AF) relay is considered. It is assumed that neither primary user activity nor the channel conditions are initially known. Both the source and relay nodes perform channel sensing in order to detect the primary user activity through energy detection. Following the channel sensing, source and relay nodes engage in channel training. Source transmits a pilot symbol which is amplified and forwarded by the relay. Upon the reception of the noisy pilot symbol, the destination employs linear minimum mean-square error (LMMSE) estimation to estimate the overall channel between the source and destination. In this setting, the effect of imperfect channel sensing results at both the source and relay on the performance of the linear MMSE estimation is analyzed. More specifically, the dependence and interactions between channel sensing parameters (e.g., detection thresholds, the probabilities of detection and false alarm) and the LMMSE estimator are studied.

Original languageEnglish (US)
Title of host publication2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
Pages124-128
Number of pages5
DOIs
StatePublished - Nov 2 2012
Event2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012 - Cesme, Turkey
Duration: Jun 17 2012Jun 20 2012

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Other

Other2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012
CountryTurkey
CityCesme
Period6/17/126/20/12

Keywords

  • Amplify-and-forward relay system
  • channel sensing
  • linear minimum mean-square error channel estimation
  • probability of detection
  • probability of false alarm

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

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  • Cite this

    Ozcan, G., & Gursoy, M. C. (2012). Channel sensing and estimation in cognitive relay networks. In 2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012 (pp. 124-128). [6292871] (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC). https://doi.org/10.1109/SPAWC.2012.6292871