Adaptive filter including signal path compensation

Details Adaptive filter including signal path compensation Adaptive filter including signal path compensation

1986-06-20

1988-03-15

Ng, Jin F.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

370 321, H04B 323

Patent

active

047318341

ABSTRACT:
Impulse response estimation is improved in an adaptive filter by compensating digital signals incoming to the filter to include a nonlinearity substantially identical to a nonlinearity included in a return signal path to the filter.

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patent: 3678504 (1972-07-01), Kaneko
patent: 4024358 (1977-05-01), Virupaksha
patent: 4464746 (1984-08-01), Snijders et al.
patent: 4467146 (1984-08-01), Lassaux
patent: 4507747 (1985-03-01), Houdard et al.
"Companded Pulse-Code Modulation Voice Codec Using Monolithic Weighted Capacitor Arrays", Paul Gray et al., IEEE Journal of Solid-State Circuits, Dec. 1975, pp. 497-498.
G. P. Eckley et al., "Digital Signal Solves Hybrid Balance Puzzle", Telephone Engineer & Management, Aug. 1, 1983, pp. 39-46.
D. L. Duttweiler, "Bell's Echo-Killer Chip", IEEE Spectrum, Oct. 1980, pp. 34-37.

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