XINWU CHEN et al: A NOVEL METHOD FOR BLIND EXTRACTION OF SIGNALS USING EMPIRICAL MODE ..
نویسندگان
چکیده
Starting from wavelet analysis of chaotic signals’ time-frequency characteristic, we propose a new harmonic signals extraction method using Empirical Mode Decomposition (EMD). We analyze features of chaotic signals using wavelet transform to determine the parameters of harmonic signals and interference signals. The harmonic signals as source signals are hidden within chaotic energy accumulation zone. We use analog Gaussian channel noise generator on the observed signals according to the system requirement. We make empirical mode analysis of observed signals to establish virtual accepting arrays which implement the desired signal extracted from the accumulation zone in underdetermined system. This will reduce the additive effects of the channel noise on the extracted signals. Simulations verified the validity and general application of the method.
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