User cooperation in heterogeneous cognitive radio networks with interference reduction

Chunhua Sun, Khaled Ben Letaief

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

71 Citations (Scopus)

Abstract

In cognitive radio systems, secondary users can share the spectrum with the primary user as long as the quality of service (QoS) of the primary system is guaranteed. However, the system throughput of the cognitive system will be limited when the QoS requirement is stringent. Recently cooperative diversity has been proposed as a powerful method that can provide dramatic gains in wireless environments. In this paper, we investigate the problem of spectrum sharing together with adaptive user cooperation in heterogeneous cognitive relay system. To maximize the throughput of the cognitive system, one best relay will be selected and besides, optimal power allocation is performed between the source and the relay. In addition, beamforming is applied to further reduce the interference and improve the system performance. Simulation results show the improvement of the throughput as opposed to the direct transmission.

Original languageEnglish
Title of host publicationICC 2008 - IEEE International Conference on Communications, Proceedings
Pages3193-3197
Number of pages5
DOIs
Publication statusPublished - 12 Sep 2008
EventIEEE International Conference on Communications, ICC 2008 - Beijing, China
Duration: 19 May 200823 May 2008

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486

Other

OtherIEEE International Conference on Communications, ICC 2008
CountryChina
CityBeijing
Period19/5/0823/5/08

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Sun, C., & Letaief, K. B. (2008). User cooperation in heterogeneous cognitive radio networks with interference reduction. In ICC 2008 - IEEE International Conference on Communications, Proceedings (pp. 3193-3197). [4533637] (IEEE International Conference on Communications). https://doi.org/10.1109/ICC.2008.601