Performance of discrete wavelet transform with convolutional code in chaotic DS-CDMA system for microsatellite communication

In this paper, we develop a software package on C++ Builder language that consists to made a combination between chaos based spread sequence for DS-CDMA combined with convolutional code and with the discrete wavelet transform in microsatellite communication. The proposed strategy is based on tow key ideas. The first concept consist the use of the chaotic spread-spectrum using discrete-time synchronization in order to minimize interference (MAI) caused by the multiple access, to assure the transmitter-receiver synchronization and to secure the transmission information. The second idea consist the use of convolutional code with Viterbi algorithm and discrete wavelet transform to decreases SNR in order to increases system capacity. The attractable software obtained can be suitably inserted as a routine code in a large software package.