FFT design for OFDM-based cognitive radio using a reconfigurable baseband processing architecture

Wenqing Lu, Gerald E Sobelman, Xiaofang Zhou, Junyan Ren

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

1 Scopus citations

Abstract

Cognitive Radio (CR) has been proposed to address the apparent paradox between spectrum scarcity and spectrum underutilization. It requires the use of a reconfigurable architecture to support a wide range of operating modes. In the case of OFDM-based CR, several subcarriers could interfere with licensed (i.e., the primary) users, so there may be a large number of zero-valued input/output points of the IFFT/FFT and the standard FFT algorithms are not efficient in such a situation. In this paper, we discuss how a more appropriate FFT algorithm, transform decomposition, can be mapped onto a reconfigurable baseband processing architecture. Two mapping methods are proposed to meet various user requirements.

Original languageEnglish (US)
Title of host publication2013 IEEE 10th International Conference on ASIC, ASICON 2013
PublisherIEEE Computer Society
ISBN (Print)9781467364157
DOIs
StatePublished - Jan 1 2013
Event2013 IEEE 10th International Conference on ASIC, ASICON 2013 - Shenzhen, China
Duration: Oct 28 2013Oct 31 2013

Publication series

NameProceedings of International Conference on ASIC
ISSN (Print)2162-7541
ISSN (Electronic)2162-755X

Other

Other2013 IEEE 10th International Conference on ASIC, ASICON 2013
CountryChina
CityShenzhen
Period10/28/1310/31/13

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