Localization and Fingerprint of Radio Signals Employing a Multichannel Photonic Analog-to-Digital Converter
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1 novembre 2010
- handle: 10670/1.e4jysl
- hal: hal-00579060
- doi: 10.1109/TMTT.2010.2076730
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info:eu-repo/semantics/altIdentifier/doi/10.1109/TMTT.2010.2076730
Mots-clés
optical domain optical processing orthogonal-frequency division multiplexing modulation photonic-ADC processing radio signal fingerprint radio signal localization radio transmitters signal-to-noise ratio spatial resolution time-frequency analysis time-frequency hopping pattern ultra wideband communication ultra-wideband radio UWB transmitter localization amplification analogue-digital conversion cognitive radio down-conversion stages electrical amplification frequency band frequency hop communication generic radio transmitters low-power wireless standards multichannel photonic ADC multichannel photonic analog-to-digital converter OFDM-based UWB radio-signal fingerprint OFDM modulation optical amplification optical channelsSujets proches
Wireless (Radio) Telephone, Wireless Wireless telephone (Early radio)Citer ce document
Roberto Llorente et al., « Localization and Fingerprint of Radio Signals Employing a Multichannel Photonic Analog-to-Digital Converter », HAL-SHS : sciences de l'information, de la communication et des bibliothèques, ID : 10.1109/TMTT.2010.2076730
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Résumé
The fingerprint and localization of radio signals employing a multichannel photonic analog-to-digital converter (ADC) is proposed, analyzed, and demonstrated in a laboratory experiment. The photonic ADC detects the radio signals with high sensitivity in a large bandwidth without down-conversion stages. This is of special interest when processing emerging low-power wireless standards like ultra-wideband (UWB) radio. The optical processing in the multichannel photonic ADC is tailored for the localization and fingerprint of generic radio transmitters when orthogonal-frequency division multiplexing (OFDM) modulation is employed in the transmission. The photonic ADC includes engineered optical and electrical amplification. The experimental work demonstrates that detection of radio signals with -65 dBm power with signal-to-noise ratio better than 20 dB is feasible, which is in good accordance with the theoretical analysis. The multichannel photonic ADC comprises five optical channels which are precisely time-aligned in optical domain achieving 0.23-m spatial resolution (median) in the localization of radio transmitters. The experimental work also demonstrates that photonic-ADC processing is adequate for OFDM-based UWB radio-signal fingerprint including estimation of the average power, frequency band of operation, and time-frequency hopping pattern if applicable. UWB transmitter localization has been experimentally demonstrated with 0.4-m error