Coherent Spread Spectrum System
Coherent Spread Spectrum System
An Introduction to Spread-Spectrum Communications
An Introduction to Spread-Spectrum Communications
Chaos Applications in Telecommunications
Chaos Applications in Telecommunications
Accurate bit error rate calculation for asynchronous chaos-based DS-CDMA over multipath channel
EURASIP Journal on Advances in Signal Processing
Synchronization for a class of uncertain chaotic cellular neural networks with time-varying delay
ISNN'10 Proceedings of the 7th international conference on Advances in Neural Networks - Volume Part I
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In this paper we propose two systems for achieving synchronization in asynchronous multi-user chaos-based DS-CDMA. For the first system, synchronization process is realized thanks to a binary code used as an additive pilot sequence to the spreaded signal. Gold sequences are used as pilot signals for the different users to accomplish the synchronization. For the second synchronization system, the synchronization is made through a binary code used as a multiplicative pilot signal for the spreaded data sequence. These synchronization processes are evaluated under the assumption of an additive white Gaussian noise channel together with multi-user interferences. In this paper we will focus on the initial synchronization phase (code acquisition) and we assume that the system can achieve correctly the code tracking after this first synchronization phase. The code acquisition for the two systems is evaluated in terms of the probability of detection and probability of false alarm.