Modem with echo cancellation

Details Modem with echo cancellation Modem with echo cancellation

1992-06-11

1994-01-18

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

379410, H04L 514

Patent

active

052804739

ABSTRACT:
A modem receiver includes an echo canceller (122), the echo canceller including a near-end echo canceller (128) and a far-end echo canceller (130). The echo canceller also includes a phase jitter tracker (154) arranged to track and generate a phase jitter component associated with the far-end echo.

REFERENCES:
patent: 4072830 (1978-02-01), Gitlin et al.
patent: 4742510 (1988-05-01), Quatieri, Jr. et al.
patent: 4777640 (1988-10-01), Turner et al.
patent: 4970715 (1990-11-01), McMahan
Richard Gitlin and John Thompson, "A Phase Adaptive Structure for Echo Cancellation", Aug. 1978, IEEE Transactions on Communications, vol. COM-26, No. 8, pp. 1211-1220.
Thomas Quatieri and Gerald O'Leary, "Far-Echo Cancellation in the Presence of Frequency Offset", Jun. 1989, IEEE Transactions on Communications, vol. 37, No. 6, pp. 635-644.

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