TITLE:
Modeling and Simulation of CDMA Codes in Scilab
AUTHORS:
Mouhamed Fadel Diagana, Serigne Bira Gueye
KEYWORDS:
Code Division Multiple Access (CDMA), Linear Feedback Shift Register (LFSR), Maximum Length Sequence (MLS), Spread-Spectrum, Scilab, Xcos, Direct Sequence Spread Spectrum (DSSS)
JOURNAL NAME:
International Journal of Communications, Network and System Sciences,
Vol.8 No.7,
July
23,
2015
ABSTRACT: Prior to hardware implementation,
simulation is an important step in the study of systems such as Direct Sequence
Code Division Multiple Access (DS-CDMA). A useful technique is presented,
allowing to model and simulate Linear Feedback Shift Register (LFSR) for CDMA.
It uses the Scilab package and its modeling tool for dynamical systems Xcos.
PN-Generators are designed for the quadrature-phase modulation and the Gold
Code Generator for Global Positioning System (GPS). This study gives a great
flexibility in the conception of LFSR and the analysis of Maximum Length
Sequences (MLS) used by spread spectrum systems. Interesting results have been
obtained, which allow the verification of generated sequences and their
exploitation by signal processing tools.