Title :
Realization of orthogonal codes in optical information processing
Author :
Maity, G.K. ; Maity, Santi P.
Author_Institution :
Dept. of Electron. & Commun. Eng., Calcutta Inst. of Technol., Uluberia, India
fDate :
Nov. 30 2012-Dec. 1 2012
Abstract :
Spread spectrum (SS) has proven to be an efficient transmission scheme due to its antijamming and interference reduction capability. In multiuser environment, users are assigned distinguishable unique codes with low cross correlation (CC) values among each other. Walsh-Hadamard codes are an important class of spreading codes that allow construction of long sequences with desired cross correlation values. Optical realization of Walsh-Hadamard codes becomes important for optical code division multiple access (CDMA). Design needs the use of nonlinear optics capable of handling multivalued signal. To this aim, this paper proposes an all-optical design of Walsh-Hadamard codes that exploit the polarization properties of light.
Keywords :
Hadamard codes; code division multiple access; nonlinear optics; optical information processing; orthogonal codes; spread spectrum communication; Walsh-Hadamard codes; all-optical design; antijamming capability; distinguishable unique codes; interference reduction capability; low cross correlation values; multiuser environment; multivalued signal; nonlinear optics; optical code division multiple access; optical information processing; optical realization; orthogonal codes; polarization properties; spread spectrum; spreading codes; transmission scheme; Laser beams; Matrix converters; Nonlinear optics; Optical fibers; Optical polarization; Optical switches; Phase change materials; Walsh-Hadamard codes; cross correlation; optical nonlinear material; spread spectrum;
Conference_Titel :
Emerging Applications of Information Technology (EAIT), 2012 Third International Conference on
Conference_Location :
Kolkata
Print_ISBN :
978-1-4673-1828-0
DOI :
10.1109/EAIT.2012.6407930
