Sub-Nyquist Coherent Imaging Using an Optimizing Multiplexed Sampling Scheme [Tips & Tricks]

Yeonwoo Jeong, Behnam Tayebi, Jae Ho Han

Research output: Contribution to journalArticlepeer-review


Several techniques have been developed to overcome the limitation of sensor bandwidth for 2D signals [1]. Though compressive sensing is an attractive technique that reduces the number of measurements required to record information on a sparse signal basis [2], [3], recording information beyond the Nyquist frequency remains difficult when working with nonsparse signals. Given this constraint, this article focuses on the use of the physical bandwidth of a coherent signal in the complex form instead of its intensity form. The resulting trick combines holographic multiplexing with sampling scheme optimization to obtain the information in a 2D coherent signal from beyond the Nyquist frequency range. The prerequisites for understanding this article are a knowledge of basic algebra and the Fourier transform. Familiarity with holography is also beneficial.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalIEEE Signal Processing Magazine
Issue number7
Publication statusPublished - 2023 Nov 1

Bibliographical note

Publisher Copyright:
© 1991-2012 IEEE.

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics


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