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Detection of Fast Frequency-Hopping Signals Using Dirty Template in the Frequency Domain

Authors
Lee, Kyung-GyuOh, Seong-Jun
Issue Date
2월-2019
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords
Detection; frequency hopping; fast frequency hopping; dirty template
Citation
IEEE WIRELESS COMMUNICATIONS LETTERS, v.8, no.1, pp.281 - 284
Indexed
SCIE
SCOPUS
Journal Title
IEEE WIRELESS COMMUNICATIONS LETTERS
Volume
8
Number
1
Start Page
281
End Page
284
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/67738
DOI
10.1109/LWC.2018.2870275
ISSN
2162-2337
Abstract
The frequency-hopping technique is widely used in commercial and military communications for its superiority in anti-jamming and low probability of interception and detection capabilities. To further lower its detection probability, a frequency-hopping signal randomly changes its carrier frequency within a transmission symbol. Conventional detection methods have poor performance in the presence of fast frequency-hopping signals. To solve this problem, we propose a dirty-template-based detection scheme. Dirty Template was originally proposed to blindly estimate the time delay in an ultra-wide-band system. We propose that it can be employed in the frequency domain to detect fast frequency-hopping signal. The decision statistic derived from the cross-correlation between the template and received signals in the frequency domain is analyzed. Using this cross-correlation, a detection scheme, based on the Neyman-Pearson test is proposed. The simulation results show that the dirty-template-based scheme outperforms the autocorrelation-based scheme when the hopping period is short.
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