Spectrum Sensing by Parallel Pairs of Cross-Correlators and Comb Filters for OFDM Systems With Pilot Tones

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This paper proposes a new spectrum sensing method for orthogonal frequency division multiplexing (OFDM) systems with pilot tones for equalization convenience. The time-domain signal cross-correlation (TDSC) method exploits the periodic feature of pilot signals embedded in time-domain OFDM signals, while random data signals deteriorate the detection performance. The new spectrum sensing method employs parallel pairs of cross-correlators and comb filters, reducing the effect of random data signals by comb filters. Simulation results of the proposed method demonstrate that the sensing performance for any given misdetection probability is improved by around 1.2 dB in SNR over the TDSC method.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2012-07
Language
English
Article Type
Article
Citation

IEEE SENSORS JOURNAL, v.12, no.7, pp.2380 - 2383

ISSN
1530-437X
DOI
10.1109/JSEN.2012.2188792
URI
http://hdl.handle.net/10203/103626
Appears in Collection
GT-Journal Papers(저널논문)
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