Principles of mobile communication (2nd ed.)
Principles of mobile communication (2nd ed.)
An Introduction to Spread-Spectrum Communications
An Introduction to Spread-Spectrum Communications
Wireless Communications
Fading mitigation in an interleaved noise-based DS-CDMA system for secure communications
SPPRA '08 Proceedings of the Fifth IASTED International Conference on Signal Processing, Pattern Recognition and Applications
Noise phase shift keying for secure multiuser code division communication systems
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Unified Analysis of UWB Transmitted-Reference Schemes in the Presence of Narrowband Interference
IEEE Transactions on Wireless Communications
An introduction to spread spectrum
IEEE Communications Magazine
Performance of ultra-wideband communications in the presence of interference
IEEE Journal on Selected Areas in Communications
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The noise modulated non-polarized communication system, developed by us recently, is an ultra-wideband transmitted-reference system designed for secure interferencefree communications. By using ultra-wideband random noise to spread the signal and by using polarization diversity for transmitting the spread message and the reference signal, we make the transmitted signal appear totally featureless and noise-like. However, the system may encounter intentional and non-intentional interference since its operating bandwidth is very large. This paper derives analytical models to characterize system performance in partial-band jamming channels and channels containing narrowband interference. Models compare very well with simulations and results validate successful system operation under low signal-to-interference ratio conditions. Research also reveals that the center frequency of transmitted signal must be suitably protected to prevent link outage due to the presence of cross-interference terms. Since multipath acts as self-interference for communication systems, a new method which can improve system performance in multipath environments is also introduced in this paper.