An Efficient FFT For OFDM Based Cognitive Radio On A Reconfigurable Architecture

Qiwei Zhang; André B.J. Kokkeler; Gerard J.M. Smit

doi:10.1109/ICC.2007.1079

An Efficient FFT For OFDM Based Cognitive Radio On A Reconfigurable Architecture

Qiwei Zhang, André B.J. Kokkeler, Gerard J.M. Smit

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

33 Citations (Scopus)

286 Downloads (Pure)

Abstract

Cognitive Radio is a promising technology to utilize non-used parts of the spectrum that actually are assigned to licensed services. An adaptive OFDM based Cognitive Radio system has the capacity to nullify individual carriers to avoid interference to the licensed user. Therefore, there could be a considerably large number of zero-valued inputs/outputs for the IFFT/FFT in the OFDM transceiver. Due to the wasted operations on zero values, the standard FFT is no longer efficient. Based on this observation, we propose to use a computationally efficient IFFT/FFT as an option for OFDM based Cognitive Radio. Mapping this algorithm onto a reconfigurable architecture is discussed.

Original language	English
Title of host publication	IEEE International Conference on Communications 2007 Cognet Workshop
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	6522-6526
Number of pages	5
ISBN (Print)	1-4244-0353-7
DOIs	https://doi.org/10.1109/ICC.2007.1079
Publication status	Published - 24 Jun 2007
Event	First IEEE CogNet Workshop, CogNet@ICC 2007: Towards Cognition in Wireless Networks - Glasgow, United Kingdom Duration: 24 Jun 2007 → 24 Jun 2007 Conference number: 1

Conference

Conference	First IEEE CogNet Workshop, CogNet@ICC 2007
Abbreviated title	CogNet@ICC
Country/Territory	United Kingdom
City	Glasgow
Period	24/06/07 → 24/06/07

Keywords

2023 OA procedure

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10.1109/ICC.2007.1079

ArticleFinal published version, 257 KBLicence: Taverne

Cite this

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title = "An Efficient FFT For OFDM Based Cognitive Radio On A Reconfigurable Architecture",

abstract = "Cognitive Radio is a promising technology to utilize non-used parts of the spectrum that actually are assigned to licensed services. An adaptive OFDM based Cognitive Radio system has the capacity to nullify individual carriers to avoid interference to the licensed user. Therefore, there could be a considerably large number of zero-valued inputs/outputs for the IFFT/FFT in the OFDM transceiver. Due to the wasted operations on zero values, the standard FFT is no longer efficient. Based on this observation, we propose to use a computationally efficient IFFT/FFT as an option for OFDM based Cognitive Radio. Mapping this algorithm onto a reconfigurable architecture is discussed.",

keywords = "2023 OA procedure",

author = "Qiwei Zhang and Kokkeler, {Andr{\'e} B.J.} and Smit, {Gerard J.M.}",

year = "2007",

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AU - Zhang, Qiwei

AU - Kokkeler, André B.J.

AU - Smit, Gerard J.M.

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N2 - Cognitive Radio is a promising technology to utilize non-used parts of the spectrum that actually are assigned to licensed services. An adaptive OFDM based Cognitive Radio system has the capacity to nullify individual carriers to avoid interference to the licensed user. Therefore, there could be a considerably large number of zero-valued inputs/outputs for the IFFT/FFT in the OFDM transceiver. Due to the wasted operations on zero values, the standard FFT is no longer efficient. Based on this observation, we propose to use a computationally efficient IFFT/FFT as an option for OFDM based Cognitive Radio. Mapping this algorithm onto a reconfigurable architecture is discussed.

AB - Cognitive Radio is a promising technology to utilize non-used parts of the spectrum that actually are assigned to licensed services. An adaptive OFDM based Cognitive Radio system has the capacity to nullify individual carriers to avoid interference to the licensed user. Therefore, there could be a considerably large number of zero-valued inputs/outputs for the IFFT/FFT in the OFDM transceiver. Due to the wasted operations on zero values, the standard FFT is no longer efficient. Based on this observation, we propose to use a computationally efficient IFFT/FFT as an option for OFDM based Cognitive Radio. Mapping this algorithm onto a reconfigurable architecture is discussed.

KW - 2023 OA procedure

U2 - 10.1109/ICC.2007.1079

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M3 - Conference contribution

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EP - 6526

BT - IEEE International Conference on Communications 2007 Cognet Workshop

PB - IEEE

CY - Piscataway, NJ

T2 - First IEEE CogNet Workshop, CogNet@ICC 2007

Y2 - 24 June 2007 through 24 June 2007

ER -

An Efficient FFT For OFDM Based Cognitive Radio On A Reconfigurable Architecture

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