Digital Signal Processing


Secure Solitary Wavelets using Simple X-Band Microwave Circuitry

Authors: Sai Venkatesh Balasubramanian

The operation of various contemporary communication systems such as WiMax in the Microwave X-Band, coupled with the information explosion in recent times has enforced a high pressure in the capacity and security handling aspects, where it would be convenient to provide these facilities at the physical level itself. The present work proposed a radically new solution to this issue, by developing a Secure Solitary Wavelet. Specifically, a Gunn Oscillator Microwave source is fed to a microwave transistor, and by using a slave low frequency signal, the nature of the output is tuned and the envelope is observed to be chaotic, and is characterized using Kolmogorov Entropy and Lyapunov Exponents. This envelope is modulated onto a hyperbolic secant function to create a Secure Solitary Wavelet. It is seen that the solitary nature induces extreme compactness and smoothness as seen by the vanishing higher moments, while the chaotic envelope is controlled by the slave frequency acting as a key and providing a layer of security to the wavelet. A Secure Solitary Wavelet based Orthogonal Frequency Division Multiplexing (OFDM) is proposed and compared with conventional OFDM in terms of performance assessment. The extreme simplicity of the proposed design coupled with the compactness and security of the Secure Solitary Wavelet form the highlights of the present work.

Comments: 5 Pages.

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Submission history

[v1] 2015-10-28 08:00:24

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