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Wavelet denoising of signals based on the fourth order moment

In many applications the localization of a wireless communications transmitter is important. Localization of a mobile wireless communication unit using the time difference of arrival (TDOA) method is addressed. The localization of a GSM type emitter is enhanced by using denoised time domain signals. Denoising is obtained by thresholding the wavelet detail coefficients in time and the application of a fourth order moment criterion in scale. The performance, as a function of SNR and mean squared error for the TDOA is obtained.