Timing control for Modem receivers

Details Timing control for Modem receivers Timing control for Modem receivers

1989-09-01

1990-11-06

Olms, Douglas W.

Pulse or digital communications

Repeaters

Testing

375106, H03H 730

Patent

active

049691635

ABSTRACT:
For a modem receiver using an adaptive equalizer with fractional tap spacing, method and apparatus are disclosed for controlling the sample-timing phase. By evaluating bandedge components of the received signal in a particular way, a timing-phase vector signal is derived which is independent of the signal energy at the bandedges and of the quality of frequency separation of the filters for the bandedge signals. After an initial period, the current timing-phase vector signal is captured and stored as a reference. Thereafter, the sampling phase of the receiver is kept at its initial random value, represented by the stored reference timing-phase vector. The necessity to initially change the sampling phase in the receiver to a value which is forced by the received signal is avoided.

REFERENCES:
patent: Re31351 (1983-08-01), Falconer
patent: 3943448 (1976-03-01), Motley et al.
patent: 3962637 (1976-06-01), Motley et al.
patent: 3978407 (1976-08-01), Forney, Jr. et al.
patent: 4004226 (1977-01-01), Quresh et al.
patent: 4253184 (1981-02-01), Gitlin et al.
patent: 4309770 (1982-10-01), Godard
patent: 4313202 (1982-01-01), Kameya
patent: 4343759 (1982-08-01), Kusika et al.
patent: 4775988 (1988-10-01), Chevillat et al.

Affiliated with

Also associated with

Rating

Timing control for Modem receivers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Timing control for Modem receivers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing control for Modem receivers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1312022