Broadband microwave spectrum sensing based on photonic RF channelization and compressive sampling

Bo Yang, Hao Chi (Corresponding author), Shuna Yang, Zizheng Cao, Jun Ou, Yanrong Zhai

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11 Citations (Scopus)
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Abstract

A novel approach to realize broadband microwave spectrum sensing based on photonic RF channelization and compressive sampling (CS) is proposed. The photonic RF channelization system is used to slice the input broadband signal into multiple sub-channel signals with narrow bandwidth in parallel and thus the rate of pseudo-random binary sequence (PRBS) and the bandwidth of the MZM for CS can be largely decreased. It is shown that a spectrally sparse signal within a wide bandwidth can be captured with a sampling rate far lower than the Nyquist rate thanks to both photonic RF channelization and CS. In addition, the influence of the non-ideal filtering of the photonic channelizer is evaluated and a novel approach based on measuring twice is proposed to overcome the problem of frequency aliasing induced by the non-ideal filtering. It is demonstrated that a system with 20 Gbit/s PRBS and 2.5 GS/s digitizer can be used to capture a signal with multiple tones within a 40 GHz bandwidth, which means a sampling rate 32 times lower than the Nyquist rate.

Original languageEnglish
Article number8936887
Number of pages10
JournalIEEE Photonics Journal
Volume12
Issue number1
DOIs
Publication statusPublished - Feb 2020

Funding

Manuscript received November 24, 2019; revised December 5, 2019; accepted December 14, 2019. Date of publication December 19, 2019; date of current version January 7, 2020. This work was supported in part by the National Key R&D Program of China under Grant 2019YFB2203204, in part by the National Natural Science Foundation of China under Grants 61975048, 61901148, and 41905024, and in part by the Zhejiang Provincial Natural Science Foundation of China under Grants LQ20F010008, LZ20F010003 and LQ18F050002. Corresponding author: Hao Chi (e-mail: [email protected]).

FundersFunder number
National Natural Science Foundation of China61901148, 61975048, 41905024
Natural Science Foundation of Zhejiang ProvinceLQ20F010008, LQ18F050002, LZ20F010003
National Key Research and Development Program of China2019YFB2203204

    Keywords

    • compressive sampling
    • microwave photonics
    • Photonic RF channelization

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