Subband sdaptive filtering for efficient spectrum utilization in cognitive radios

Pingzhou Tu*, Xiaojing Huang, Eryk Dutkiewicz

*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

Efficient spectrum utilization can be achieved in several ways, one of which is a better spectrum access. In this paper we propose a subband adaptive filtering method for effective spectrum access and dynamic spectrum sharing in cognitive radios (CR). Based on an interleaved spread spectrum orthogonal frequency division multiplexing (ISS-OFDM) multiple subband transmission signal and subband adaptive filtering technique, some interfered subbands of the transmission signal are filtered and dropped off. The other subbands without interference or with interference less than a predetermined threshold are used for information transmission. The flexibility of the adaptively selecting transmission subbands provides users with the ability to fill in spectrum holes with appropriate number of subbands. Consequently, the spectrum utilization efficiency is improved. We simulate the system bit error rate (BER) performances and demonstrate the improvement on spectrum utilization efficiency by using this subband adaptive filtering method, when different numbers of subbands are used for information transmission.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom 2008
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-4
Number of pages4
ISBN (Print)9781424423026
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom 2008 - Singapore, Singapore
Duration: 15 May 200817 May 2008

Other

Other3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom 2008
CountrySingapore
CitySingapore
Period15/05/0817/05/08

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