Wideband spectrum sensing in cognitive radio networks

Zhi Quan, Shuguang Cui, Ali H. Sayed, H. Vincent Poor

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

150 Scopus citations

Abstract

Spectrum sensing is an essential enabling functionality for cognitive radio networks to detect spectrum holes and opportunistically use the under-utilized frequency bands without causing harmful interference to legacy networks. This paper introduces a novel wideband spectrum sensing technique, called multiband joint detection, which jointly detects the signal energy levels over multiple frequency bands rather than consider one band at a time. The proposed strategy is efficient in improving the dynamic spectrum utilization and reducing interference to the primary users. The spectrum sensing problem is formulated as a class of optimization problems in interference limited cognitive radio networks. By exploiting the hidden convexity in the seemingly non-convex problem formulations, optimal solutions for multiband joint detection are obtained under practical conditions. Simulation results show that the proposed spectrum sensing schemes can considerably improve the system performance. This paper establishes important principles for the design of wideband spectrum sensing algorithms in cognitive radio networks.

Original languageEnglish (US)
Title of host publicationICC 2008 - IEEE International Conference on Communications, Proceedings
Pages901-906
Number of pages6
DOIs
StatePublished - 2008
EventIEEE International Conference on Communications, ICC 2008 - Beijing, China
Duration: May 19 2008May 23 2008

Publication series

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

Other

OtherIEEE International Conference on Communications, ICC 2008
CountryChina
CityBeijing
Period5/19/085/23/08

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Wideband spectrum sensing in cognitive radio networks'. Together they form a unique fingerprint.

  • Cite this

    Quan, Z., Cui, S., Sayed, A. H., & Poor, H. V. (2008). Wideband spectrum sensing in cognitive radio networks. In ICC 2008 - IEEE International Conference on Communications, Proceedings (pp. 901-906). [4533213] (IEEE International Conference on Communications). https://doi.org/10.1109/ICC.2008.177