Abstract

In this article a method is described for the detection of linear frequency modulation (FM) pulses with unknown frequency rate parameters in a noisy environment. The method, which is equivalent to the wavelet transform, enhances the signal towards noise. The technique is based on the variation of the domain after which a Fourier transform is applied, or for short called ‘‘variable domain transform.’’ The enhancement is in the order of pulse compression. The computational speed is of the order of that of the fast Fourier transform. The method is also applicable for other signal forms. A criterion is given for the type of signals that can be processed in that manner. An actual signal is analyzed and discussed.

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