Photonic time stretch channelizer for broadband microwave spectrum sensing

Wang, Chao (2014) Photonic time stretch channelizer for broadband microwave spectrum sensing. In: 35th Progress in Electromagnetics Research Symposium (PIERS),, 25-28 Aug. 2014, Guangzhou, China. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

Microwave spectrum sensing is of critical importance in wireless communications, radars and electronic warfare. Measuring high-frequency and broadband RF signals in a high- speed and high-resolution while low-cost manner is challenging. Photonically assisted techniques have shown superior performance over their electronic counterpart. Particularly, optical spectral channelizer based technique has attracted great interest as it enables lost-cost spectrum mea- surement for multi-tone microwave signals. One di±culty of this technique is its relatively poor measurement resolution, limited by the channel spacing. Based on photonic time-stretch technique, which mirrors the spectrum shape of a largely chirped optical pulse to its temporal waveform, here we propose to use an optical channelizer to equiva- lently sample the modulated optical pulse. Since no high-speed photodetector is required, system cost is greatly reduced. More importantly, the method features greatly improved measurement resolution, which is more than two orders of magnitude higher than the channel spacing. The technique was veriØed by experimental demonstrations. Means to further improve the measure- ment resolution and operational bandwidth will be discussed as well

Item Type: Conference or workshop item (Paper)
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Tina Thompson
Date Deposited: 29 Oct 2015 10:38 UTC
Last Modified: 30 Oct 2015 14:01 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51266 (The current URI for this page, for reference purposes)
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