Holographic code division multiple access
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United States of America Patent
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Jun 1, 1993
Grant Date -
N/A
app pub date -
Jan 15, 1992
filing date -
Jan 15, 1992
priority date (Note) -
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Abstract
A technique for all-optical Code Division Multiple Access (CDMA) system based on optical holography is disclosed. In this technique the energy of an incoming information light signal is spread over a spatial domain by a two-dimensional spatial encoder which includes a mask having regions of first and second transmission characteristics corresponding to the unique code assigned to a particular source. Subsequent decoding, which is accomplished by an optical matched filter through the use of a hologram, spatially despreads the energy of the information light signal and produces a focused light beam which serves as input to a code division detector.
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