Boots – shoes – and leggings
Patent
1985-06-14
1986-05-13
Malzahn, David H.
Boots, shoes, and leggings
364825, G06F 1531
Patent
active
045890838
ABSTRACT:
The invention relates to an adaptive filtering system for cancelling one or more sinusoidal interference signal contained with a desired signal in an incoming signal. A phase-locked loop is used to track a sinusoidal interference frequency and to synthesize various synchronous in-phase/in-quadrature square wave signals. Each of these signals is weighted in accordance with variations in the amplitude and the phase of the sinusoidal interference signal and the weighted square wave signals are combined together with the incoming signal so as to deliver the desired signal substantially free from any sinusoidal interference signal. In the case of multiple correlated signals, the instant filtering system gives a steady state performance substantially better than that of the well known Widrow-Hoff adaptive notch filter.
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patent: 4349916 (1982-09-01), Roeder
patent: 4429309 (1984-01-01), Kipp
patent: 4441090 (1984-03-01), Warren
White, "An Adaptive Tunning Filter for Communications", Conference: 1982 International Symposium on Circuits & Systems, Rome, Italy, May 10-12, 1982, pp. 705-708.
Le Dinh Chon T.
Leblanc Andre
Centre de Recherche Industrielle Du Quebec
Malzahn David H.
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