Control of coefficient drift for fractionally spaced equalizers

Details Control of coefficient drift for fractionally spaced equalizers Control of coefficient drift for fractionally spaced equalizers

1980-12-05

1983-05-17

Yusko, Donald J.

Pulse or digital communications

Repeaters

Testing

333 18, H04B 110

Patent

active

043843557

ABSTRACT:
Tap coefficient drift in a fractionally spaced equalizer (10) is minimized by adding signal energy (n(t)) to the received data signal (s.sub.r (t)) at frequencies where the sampled channel transfer function has substantially zero gain.

REFERENCES:
patent: 3974449 (1976-08-01), Falconer
patent: 4021738 (1977-05-01), Gitlin et al.
patent: 4100604 (1978-07-01), Perreault
patent: 4158232 (1979-06-01), Koeth et al.
patent: 4181888 (1980-01-01), Falconer
patent: 4184129 (1980-01-01), Danjon et al.
patent: 4247940 (1981-01-01), Mueller et al.
"Fractional Tap-Spacing Equalizers and Consequences for Clock Recovery for Data Modems," G. Ungerboeck, IEEE Transaction on Communications, vol. COM-24, No. 8, Aug. 1976, pp. 856-864.

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