Boots – shoes – and leggings
Patent
1992-08-20
1993-11-23
Malzahn, David H.
Boots, shoes, and leggings
36472401, G06F 1531
Patent
active
052650421
ABSTRACT:
This invention describes a nonlinear comb filter device and a method for removing harmonic interference from a corrupted signal. Here, a corrupted signal is defined as a signal containing an impulsive signal and harmonic interference. The corrupted signal is delayed through a delay line. The delay line has a plurality of tapped output terminals each spaced at a delay time that is a multiple of the fundamental period of the harmonic interference. An odd number of taps is preferred for ease of sampling and ease of performing certain nonlinear functions such as a median. Each delay line tap is connected to a corresponding input to a nonlinear device. A median device is one possible embodiment of a nonlinear device. The delay line and the nonlinear device extract the harmonic interference from the corrupted signal. The corrupted signal is synchronized with the extracted harmonic interference by tapping the corrupted signal off of the delay line at a delay that is equal to the average delay of the delay line and the nonlinear device. The extracted harmonic interference is then subtracted from the synchronized corrupted-signal in order to produce the impulsive signal of interest.
REFERENCES:
patent: 4344150 (1982-08-01), McLaughlin
patent: 4672567 (1987-06-01), Kelly et al.
patent: 4724395 (1988-02-01), Freeman
patent: 4928258 (1990-05-01), May
patent: 4951242 (1990-08-01), Hobson
patent: 5138567 (1992-08-01), Mehrgardt
Narendra, "A Separable Median Filter For Image Noise Smoothing" IEEE Trans. on Pattern Analysis and Machine Intelligence vol. PAMI-3, No. 1, Jan. 1981, pp. 20-29.
Elliott, "Adaptive Cancellation of Periodic, Synchronously Sampled Interfence" IEEE Trans. on Acoustics, Speech & Signal Processing vol. ASSP-33 No. 3 Jun. 1985, pp. 715-717.
Wang, "Adaptive Harmonic Noise Cancellation with an Application to Distribution Power Line Communications" IEEE Trans. on Communications, vol. 36, No. 7 Jul. 1988.
Astola et al, "On Computation of the Running Median" IEEE Trans. on Acoustics, Speech & Signal Processing vol. 37 No. 4 Apr. 1989, pp. 572-574.
Nehorai, "Adaptive Comb Filtering For Harmonic Signal Enhancement" ICASSP 85, 1985, pp. 335-338.
Longhotham et al, "Theory of Order Statistic Filters & Their Relationship to Linear FIR Filters" IEEE Trans. on Acoustics, Speech & Signal Processing, vol. 37, No. 2, Feb. 1989, pp. 275-277.
Malzahn David H.
Maser Thomas O.
Morelli Robert D.
The United States of America Government as represented by the Di
Utermohle John R.
LandOfFree
Device and method for a nonlinear comb filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and method for a nonlinear comb filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and method for a nonlinear comb filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1854865