Abstract

A scheme for epoch synchronization of random frequency-hopped signals in broadband noise is presented. This scheme operates on the power samples of the real-time autocorrelation function of the received waveform. The scheme takes advantage of the fact that power sampling in the correlation domain suppresses frequency and phase dependence, but preserves timing information, in order to construct a maximum-likelihood epoch estimation algorithm for which the hopping pattern need not be known. The conditional mean and variance of this estimator are derived analytically and a simple parameter is found to be adequate for measuring the estimation performance. Simulation results that confirm the analytical results are reported. >

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