Spread-space spread-spectrum technique for secure multiplexing

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Title: Spread-space spread-spectrum technique for secure multiplexing
Authors: Hennelly, Bryan M.
Naughton, Thomas J.
McDonald, John B.
Sheridan, John T.
Gopinathan, Unnikrishnan
Kelly, Damien P.
Javidi, Bahram
Permanent link: http://hdl.handle.net/10197/3420
Date: 1-May-2007
Abstract: A novel technique for multiplexing complex images is proposed in which each image may be demultiplexed only if a set of random encryption keys is known. The technique utilizes the ability of the double random phase encoding method to spread a signals’ energy in both the space and the spatial frequency domains in a controlled manner. To multiplex, images are independently encrypted with different phase keys and then superimposed by recording sequentially on the same material. Each image is extracted by using the particular key associated with it. During decryption the energy from the other images is further spread, making it possible to minimize its effects by using suitable filters. Wigner analysis is applied to the technique, and numerical results are presented.
Funding Details: Irish Research Council for Science, Engineering and Technology
Type of material: Journal Article
Publisher: Optical Society of America
Copyright (published version): 2007 Optical Society of America
Subject LCSH: Spread spectrum communications
Multiplexing
Signal processing
Fourier transform optics
Holography
DOI: 10.1364/OL.32.001060
Language: en
Status of Item: Not peer reviewed
Appears in Collections:Electrical and Electronic Engineering Research Collection

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