CDMA Systems Engineering Handbook
CDMA Systems Engineering Handbook
Performance of a Multiple Access Orthogonal Wavelet Division Multiplexing System
ICITA '05 Proceedings of the Third International Conference on Information Technology and Applications (ICITA'05) Volume 2 - Volume 02
ICITA '05 Proceedings of the Third International Conference on Information Technology and Applications (ICITA'05) Volume 2 - Volume 02
Noise-based DS-CDMA system performance with timing jitter
CIT'11 Proceedings of the 5th WSEAS international conference on Communications and information technology
Performance of Non-Polarized Noise Modulated Communications System in the Presence of Interference
Wireless Personal Communications: An International Journal
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This paper shows that the noise signals can be used to carry users' information in a code division multiple access (CDMA) system. The random sequences, which have the Gaussian distribution of their samples, can be efficiently used to spread and encode the users' messages given in binary form. A mathematical model of this system, called the Noise Phase Shift Keying (NPSK), is presented and the expression for the probability of error is derived. It was shown that this probability depends on the number of users as well as on the spreading factor used in the system. Because the transmitted signal is a sum of the random signals the security of the communication system can be enormously increased. It is shown also that this kind of spreading can be used also in a single user spread spectrum communication system.