Digital bit rate synchronizer for digital echo cancellers and si

Details Digital bit rate synchronizer for digital echo cancellers and si Digital bit rate synchronizer for digital echo cancellers and si

1981-09-09

1983-10-18

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

1791706, 364164, 375106, H04B 7015

Patent

active

044110065

ABSTRACT:
In a digital echo canceller using an impulse response filter, an interpolating and synchronizing circuit is used to couple the received digital signals from the four-wire circuit to the input of the filter. The interpolation and synchronization circuit generates signals having values between the values of received digital samples, and these interpolated valves are then sampled at the send signal rate and supplied to the impulse response filter.

REFERENCES:
patent: 3504126 (1970-03-01), Inose et al.
patent: 4071744 (1978-01-01), Pollock
patent: 4074086 (1978-02-01), Falconer et al.
patent: 4151589 (1979-04-01), Ross
patent: 4253181 (1981-02-01), Watten

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