Title :
TOAD-based all-optical gold code generator
Author :
Maity, G.K. ; Maity, S.P. ; Roy, J.N.
Author_Institution :
Bengal Eng. & Sci. Univ., Shibpur, India
Abstract :
Spread spectrum (SS) has proven to 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. Gold sequences are an important class of sequences that allow construction of long sequences with three valued cross correlation function. Gold sequences are constructed from pairs of preferred m-sequences of the same length by modulo-2 addition. This paper presents a circuit realization of gold code in all-optical domain using semiconductor optical amplifier (SOA) based terahertz optical asymmetric demultiplexer (TOAD). Performance of the proposed optical realization is evaluated through numerical simulation, which confirms its feasibility in terms of the choice of the critical parameters.
Keywords :
Gold codes; code division multiplexing; correlation methods; demultiplexing equipment; interference suppression; jamming; m-sequences; multiuser detection; radio spectrum management; semiconductor optical amplifiers; Gold sequences; TOAD; all-optical gold code generator; antijamming reduction; circuit realization; cross correlation function; interference reduction; m-sequence; modulo-2 addition; multiuser environment; numerical simulation; semiconductor optical amplifier; spread spectrum; terahertz optical asymmetric demultiplexer; Generators; Gold; Nonlinear optics; Optical pulses; Optical reflection; Stimulated emission;
Conference_Titel :
Devices, Circuits and Systems (ICDCS), 2012 International Conference on
Conference_Location :
Coimbatore
Print_ISBN :
978-1-4577-1545-7
DOI :
10.1109/ICDCSyst.2012.6188803
