Boots – shoes – and leggings
Patent
1996-07-31
1998-12-22
Sheikh, Ayaz R.
Boots, shoes, and leggings
702 76, G06F 1531, G01R 2316
Patent
active
058525670
ABSTRACT:
An iterative time frequency algorithm filters noisy wide band
onstationary signals by projecting the noisy signal into the TF domain, masking the TF response, computing the inverse TF transform to extract a filtered signal, and repeating these steps until the projection lies within the mask. As a result, the TF domain properties of the extracted signal are substantially equal to the desired TF domain properties. Furthermore, the iterative approach is computationally simple because it avoids inverting matrices. The TF transform and its inverse must be selected such that the iterative algorithm is guaranteed to converge. Candidate transform pairs can be tested on known data, and if the TF transforms converge to the desired TF properties, the candidate pair can be selected. Alternately, the candidate pairs can be tested against a sufficient convergence condition, and if they satisfy the condition within an acceptable tolerance, they can be selected with confidence. Furthermore, the sufficient convergence condition can be solved directly to provide the TF transform and its inverse.
REFERENCES:
patent: 4837578 (1989-06-01), Gammell
patent: 4894795 (1990-01-01), Whitehouse et al.
patent: 5046504 (1991-09-01), Albert et al.
patent: 5291560 (1994-03-01), Daugman
patent: 5353233 (1994-10-01), Oian et al.
Qian, Shie and Dapang Chen, "Discrete Gabor Transform," IEEE Transactions on Signal Processing, vol. 41, No. 7, Jul. 1993, pp. 2429-2438.
Qian, Shie and Dapang Chen, "Optimal Biorthogonal Analysis Window Function for Discrete Gabor Transform," IEEE Transactions on Special Processng, vol. 42, No. 3, Mar. 1994, pp. 694-697.
Qian et al., "Discrete Gabor Transform", IEEE Transactions on Signal Processing, vol. 41, No. 7, Jul. 1993, pp. 2429-2438.
Wexler et al., "Discrete Gabor Expansions", Elsevier Science Publishers B.V., vol. 21, No. 3, Nov. 1990, pp. 207-220.
Qian Shie
Xia Xiang-Gen
Denson-Low W. K.
Duraiswamy V. D.
Hughes Electronics Corporation
Lee Douglas S.
National Instruments Corporation
LandOfFree
Iterative time-frequency domain transform method for filtering t does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Iterative time-frequency domain transform method for filtering t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iterative time-frequency domain transform method for filtering t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2052732