Oluyemi E. Adetoyi1
and Solomon A. Adeniran2
1 Electrical and Electronic Engineering Department, University of Ibadan, Nigeria
2 Electronic and Electrical Engineering Department, Obafemi Awolowo University, IleIfe,
Nigeria
ABSTRACT
In CDMA system, m-sequence and Gold codes are often utilized for spreading-despreading and
scrambling-descrambling operations. In a previous work, a design framework was created for generating
large family of codes from logistic map, which have comparable autocorrelation and cross correlation to
m-sequence and Gold codes. The purpose of this work is to evaluate the performance of these chaotic
codes in a CDMA environment. In the bit error rate (BER) simulation, matched filter, decorrelator and
MMSE receiver have been utilized. The received signal was modelled for synchronous CDMA uplink for
simulation simplicity purpose. Additive White Gaussian Noise channel model was assumed for the
simulation.
CDMA, Chaotic codes, Linear Receivers, Logistic Map, Lyapunov exponent
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