Share Email Print
cover

Proceedings Paper

Multiple-access interference in 2-D wavelength/time optical CDMA system with optical hard-limiters
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

In this paper we present the proposed modification of 2-D wavelength/time (WIT) decoder1 by placing the second optical hard-limiter (0-HL) after decoder's last optical coupler. The MA1 improvement of the 2-D W/T Optical Code Division Multiple Access (0-CDMA) system for the cases of 2D WIT decoder with one and with two 0-HLs is analyzed. Average value of signal-to-interference difference (SID) is used as the MA1 merit. The model of such 2D W/T 0-CDMA system for numerical calculation of the SID is proposed and presented in this paper. In the analyzed system, 2-D WIT Generalized Multiwavelength Prime Codewords (GMWPC), which are generated by algorithm reported in2 are used for achieving multiple-access. We assume the implemented 0-HL proposed in 3. The properties of such 0-HL were approximated [4] and its two ideality parameters, which characterize the measure of its ideality, were defined. The input and output time optical pulses sequence of W/T 0-CDMA decoder is numerical simulated. Dependencies of SID versus the weight of codeword and the number of active users in the system are presented. The influence of the properties used 0-HLs is evaluated.

Paper Details

Date Published: 6 December 2006
PDF: 8 pages
Proc. SPIE 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 59450M (6 December 2006); doi: 10.1117/12.638920
Show Author Affiliations
Jozef Chovan, International Laser Ctr. (Slovak Republic)
Slovak Univ. of Technology (Slovak Republic)
František Uherek, International Laser Ctr. (Slovak Republic)
Slovak Univ. of Technology (Slovak Republic)


Published in SPIE Proceedings Vol. 5945:
14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics

© SPIE. Terms of Use
Back to Top