Publication: Performance of a frequency-domain OFDM-frame detector
1
0
Issued Date
2018
Resource Type
File Type
application/pdf
ISSN
18744907
Other identifier(s)
2-s2.0-85047627198
Rights Holder(s)
Scopus
Bibliographic Citation
Physical Communication. Vol 29, (2018), p.141-146
Suggested Citation
Polprasert C., Demeechai T. Performance of a frequency-domain OFDM-frame detector. Physical Communication. Vol 29, (2018), p.141-146. doi:10.1016/j.phycom.2018.04.023 Retrieved from: https://hdl.handle.net/20.500.14740/3866
Author(s)
Abstract
A frequency-domain algorithm for orthogonal frequency-division multiplexing (OFDM)-frame detection is considered useful when the OFDM system is to operate in a known narrowband interference (NBI) channel, e.g., in a cognitive radio OFDM-based overlay system. While frame detection algorithm based on state-of-the-art time-domain correlation perform poorly in such a channel, we propose a frame detection algorithm based on energy detection in frequency domain. By exploiting the NBI band information obtained during sensing period, the proposed algorithm exhibits strong performance and outperforms other existing frequency-domain OFDM frame detection alternatives even at the signal-to-interference ratio (SIR) below 0 dB. Moreover, simulation results are confirmed by the analytical performance presented as a linear combination of the incomplete gamma function. The weight of each component is a function of the eigenvalues of the matrix associated with the detection metric and the number of summation is proportional to the number of non-zero eigenvalues of the matrix associated with the detection metric. © 2018 Elsevier B.V.
Subject(s)
Cognitive radio
Eigenvalues and eigenfunctions
Frequency domain analysis
Matrix algebra
Signal detection
Synchronization
Analytical performance
Frame detection
Frequency domain algorithm
Incomplete gamma functions
Linear combinations
Narrow band interference
Signal to interference ratios (SIR)
Time-domain correlation
Orthogonal frequency division multiplexing
Eigenvalues and eigenfunctions
Frequency domain analysis
Matrix algebra
Signal detection
Synchronization
Analytical performance
Frame detection
Frequency domain algorithm
Incomplete gamma functions
Linear combinations
Narrow band interference
Signal to interference ratios (SIR)
Time-domain correlation
Orthogonal frequency division multiplexing