Two-step demodulation based on the Gram–Schmidt orthonormalization method | Zendy

Javier Vargas | Zendy; Juan Antonio Quiroga | Zendy; Carlos Óscar S. Sorzano | Zendy; J. C. Estrada | Zendy; J.M. Carazo | Zendy

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Two-step demodulation based on the Gram–Schmidt orthonormalization method

Author(s) -

Javier Vargas,

Juan Antonio Quiroga,

Carlos Óscar S. Sorzano,

J. C. Estrada,

J.M. Carazo

Publication year - 2012

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.37.000443

Subject(s) - demodulation , matlab , computer science , range (aeronautics) , optics , algorithm , software , physics , telecommunications , engineering , channel (broadcasting) , programming language , aerospace engineering , operating system

This Letter presents an efficient, fast, and straightforward two-step demodulating method based on a Gram-Schmidt (GS) orthonormalization approach. The phase-shift value has not to be known and can take any value inside the range (0,2π), excluding the singular case, where it corresponds to π. The proposed method is based on determining an orthonormalized interferogram basis from the two supplied interferograms using the GS method. We have applied the proposed method to simulated and experimental interferograms, obtaining satisfactory results. A complete MATLAB software package is provided at http://goo.gl/IZKF3.

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