Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 31,
  • Issue 21,
  • pp. 3395-3401
  • (2013)

Sub-Nyquist Sampled Analog-to-Digital Conversion Based on Photonic Time Stretch and Compressive Sensing With Optical Random Mixing

Not Accessible

Your library or personal account may give you access

Abstract

An approach to realizing wideband analog-to-digital conversion based on the techniques of photonic time stretch (PTS) and compressive sensing (CS) is proposed. In the system, a multitone signal within a wide bandwidth (spectrally sparse) signal is slowed down in the time domain by a photonic time stretcher. The stretched signal is then down-sampled and reconstructed by a random-demodulator-based CS scheme, in which random mixing is realized in an optical domain. Thanks to the techniques of PTS and CS, wideband spectrally sparse signals can be acquired with a sampling rate far below the Nyquist rate of the original signal. The optical random mixing applied in the system has the advantages of lower distortions and larger bandwidth compared to its electrical counterpart. In order to construct a Gaussian measurement matrix with zero mean, balanced detection is applied after the optical mixer. In addition, in order to eliminate the dc component and the even-order harmonics of the stretched signal, we propose to use balanced PTS technique in the system. We demonstrate that a system with a time stretch factor 20 and a compression factor 4 can effectively acquire a spectrally sparse wideband signal, which means a sampling rate as low as 1/80 of the Nyquist rate.

© 2013 IEEE

PDF Article
More Like This
Microwave spectrum sensing based on photonic time stretch and compressive sampling

Hao Chi, Ying Chen, Yuan Mei, Xiaofeng Jin, Shilie Zheng, and Xianmin Zhang
Opt. Lett. 38(2) 136-138 (2013)

Compressive sensing in a photonic link with optical integration

Ying Chen, Xianbin Yu, Hao Chi, Xiaofeng Jin, Xianmin Zhang, Shilie Zheng, and Michael Galili
Opt. Lett. 39(8) 2222-2224 (2014)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved