On sampling functions and Fo
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  • journal_title:Geophysics
  • Contributor:Mostafa Naghizadeh ; Mauricio D. Sacchi
  • Publisher:Society of Exploration Geophysicists
  • Date:2010-
  • Format:text/html
  • Language:en
  • Identifier:10.1190/1.3503577
  • journal_abbrev:Geophysics
  • issn:0016-8033
  • volume:75
  • issue:6
  • firstpage:WB137
  • section:SUPPLEMENT - SEISMIC DATA SAMPLING AND WAVEFIELD REPRESENTATION
摘要

d="p-1">Random sampling can lead to algorithms in which the Fourier reconstruction is almost perfect when the underlying spectrum of the signal is sparse or band-limited. Conversely, regular sampling often hampers the Fourier data recovery methods. However, 2D signals that are band-limited in one spatial dimension can be recovered by designing a regular acquisition grid that minimizes the mixing between the unknown spectrum of the well-sampled signal and aliasing artifacts. This concept can be easily extended to higher dimensions and used to define potential strategies for acquisition-guided Fourier reconstruction. The wavenumber response of various sampling operators is derived and sampling conditions for optimal Fourier reconstruction are investigated using synthetic and real data examples.

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