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Article
Spectrum Sensing of OFDM Signals in the Presence of Carrier Frequency Offset
IEEE Transactions on Vehicular Technology
  • Weiyang Xu, Chongqing University
  • Wei Xiang, University of Southern Queensland
  • Maged Elkashlan, Queen Mary University of London
  • Hani Mehrpouyan, Boise State University
Document Type
Article
Publication Date
8-1-2015
Abstract
This paper addresses the important issue of detecting orthogonal frequency-division multiplexing (OFDM) signals in the presence of carrier frequency offset (CFO). The proposed algorithm utilizes the characteristics of the covariance matrix of the discrete Fourier transform of the input signal to the detector to determine the presence of the primary user’s signal. This algorithm can be exploited to differentiate OFDM signals from the noise through the proposal of a new decision metric, which measures the off-diagonal elements of the input signal’s covariance matrix. The decision threshold subject to a given probability of false alarm is derived, while performance analysis is carried out to demonstrate the potential of the proposed algorithm. Finally, simulation results are presented to validate the effectiveness of the proposed sensing method in comparison with other existing approaches.
Copyright Statement

© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. doi: 10.1109/TVT.2015.2478517

Citation Information
Weiyang Xu, Wei Xiang, Maged Elkashlan and Hani Mehrpouyan. "Spectrum Sensing of OFDM Signals in the Presence of Carrier Frequency Offset" IEEE Transactions on Vehicular Technology (2015)
Available at: http://works.bepress.com/hani_mehrpouyan/57/