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Detection & discrimination of covert DS/SS signals using triple correlation

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3 Author(s)
Gouda, M. ; Dept. of Inf. & Simulation, Cranfield Univ., Swindon, UK ; Adams, E.R. ; Hill, P.C.J.

In light of the growing use of direct sequence spread spectrum techniques and the increasingly congested communication environments, conventional linear and nonlinear intercept receivers are ineffective in detecting direct-sequence spread spectrum (DS/SS) signals if the transmissions are designed to be covert and the chip code sequences are unavailable. An investigation into using correlation-based processing is reported showing that the cyclostationary property of DS/SS provides detection capability. Results are given of a feasibility study into using the triple correlation function (TCF) for DS/SS detection taking into account the discrete polynomial structure of the chip code sequences involved. However, it is possible under certain conditions to detect and estimate the DS/SS length and its code generating function g(X)

Published in:

Radio Science Conference, 1998. NRSC '98. Proceedings of the Fifteenth National

Date of Conference:

24-26 Feb 1998

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