Patent Number: 6,298,363

Title: Adaptive windowing of FFT data for increased resolution and sidelobe rejection

Abstract: Adaptive windowing of Fast Fourier Transform (FFT) data to reduce spectral leakage and increase sidelobe rejection. The adaptive windowing is extended to 5 and 7 point convolution formulas. Thus, the present invention extends the non-static shift-variant data adaptive window generated from a spatial variant apodization. The extensions are achieved by using the window structure of multiple cosines. The sidelobe leakage of the adaptive windows is extremely small, the signal-to-noise ration is higher than conventional techniques and spectral detection is possible with higher order windowing.

Inventors: Iannuzzelli; Russell J. (Bethesda, MD)

Assignee: The Johns Hopkins University

International Classification: G06F 17/14 (20060101); H03H 21/00 (20060101); G06F 017/14 ()

Expiration Date: 10/02/2018