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A LFM interference suppression method based on oblique projection is proposed for GPS receiver. It is applicable to the GPS propagation environment with LFM interferences, multipath and noise. By using the concentration property of LFM interferences in fractional Fourier domain, the initial frequency, frequency modulation rate and direction-of-arrival (DOA) of LFM interferences are first estimated...
A novel direction of arrival (DOA) estimation method is proposed for coherent wideband linear frequency modulated (LFM) signals in multipath environment. In this method, the wideband LFM signals are first transformed into fractional Fourier (FRF) domain to construct the array model, in which time-variant steering vector is changed into time-invariant one and wideband LFM signals are converted to narrowband...
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