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It has been shown that the performance of communication systems based on low dimensional chaotic systems with exact analytic solutions containing a single fixed basis function may exhibit performance comparable to that of nonchaotic systems. Previously, novel low frequency (LF) oscillators exhibiting solvable, chaotic behavior have been proposed, although the generation of low frequency signals has...
One of the first steps to be accomplished by a cognitive user in cognitive radio applications is spectrum sensing: analysis of the received electromagnetic transmissions to search for unoccupied spectrum bands (spectrum holes). We propose two spectrum sensing methods based on comparing the power spectral densities estimated from data acquired over two non-overlapping time segments. The first window...
Combined detection-estimation (DE) schemes for estimating the state of a dynamical stochastic system with uncertainties are considered. Several different performance criteria such as the weighted minimax mean-squared error and the incremental mean-squared error are used. The uncertainties in the system model too are modeled in several different ways such as single or multiple bounds on the unknown...
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