Time-varying microwave photonic filter for arbitrary waveform signal-to-noise ratio improvement

Author:

Ma Dong1,Chen Yang1ORCID

Affiliation:

1. East China Normal University

Abstract

A time-varying microwave photonic filter (TV-MPF) based on stimulated Brillouin scattering is proposed and utilized to suppress the in-band noise of broadband arbitrary microwave waveforms, thereby improving the signal-to-noise ratio (SNR). The filter-controlling signal is designed according to the signal to be filtered and drives the TV-MPF so that the passband of the filter is always aligned with the frequencies of the signal to be filtered. By continuously tracking the signal spectral component, the TV-MPF retains the spectral components of the signal and filters out the noise other than the spectral components of the signal at the current time, improving the in-band SNR of the signal to be filtered. An experiment is performed. A variety of signals with different formats and in-band SNRs are used to test the noise suppression capability of the TV-MPF, and the waveform mean-square error is calculated to quantify the improvement of the signal, demonstrating the excellent adaptability of the proposed TV-MPF to different kinds of signals.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Shanghai

Science and Technology Commission of Shanghai Municipality

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. WD2.4 Broadband Microwave Photonic Filter with Full Reconfigurability and GHz-Level Tuning Speed;2024 IEEE Photonics Society Summer Topicals Meeting Series (SUM);2024-07-15

2. Microwave Photonic Filter with user-defined reconfigurability and high frequency-selectivity;2023 International Topical Meeting on Microwave Photonics (MWP);2023-10-15

3. Photonic time-frequency filter based on the software-defined time-frequency prism;Optics Letters;2022-07-13

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