Echo cancellation in two-wire, two-way data transmission systems

Details Echo cancellation in two-wire, two-way data transmission systems Echo cancellation in two-wire, two-way data transmission systems

1980-12-23

1983-05-24

Rubinson, G. Z.

Multiplex communications

Wide area network

Packet switching

370 24, H04B 320

Patent

active

RE0312533

ABSTRACT:
An adaptive echo canceller for two-wire, simultaneous two-way data communication at full bandwidth uses Nyquist-interval, rather than baud-interval, processing to achieve independence from timing discrepancies between near-end and far-end terminals. The entire echo signal, and not merely baud-interval samples thereof, is suppressed. The echo canceller is preferably a transversal structure.

REFERENCES:
patent: 3499999 (1970-03-01), Sondhi
patent: 3500000 (1970-03-01), Kelly et al.
patent: 3597541 (1971-08-01), Proakis et al.
patent: 3732410 (1973-05-01), Mackechnie
patent: 3735055 (1973-05-01), Thomas
patent: 3810021 (1974-05-01), Kalet et al.
patent: 3922505 (1975-11-01), Hoge
patent: 4007341 (1977-02-01), Sourgens et al.
patent: 4087654 (1978-05-01), Mueller
V. Koll and S. Weinstein; "Simultaneous Two-Way Data Transmission over a Two-Wire Circuit"; IEEE Transactions on Communications; Feb. 1973; pp. 143-147.
M. Sondhi; "An Adaptive Echo Canceller"; Bell System Technical Journal; vol. XLVI, No. 3; Mar. 1967; pp. 497-511.
F. Becker and H. Rudin; "Application of Automatic Transversal Filters to the Problem of Echo Suppression"; Bell System Tech. Journal; Dec. 1966; pp. 1847-1850.
K. Mueller; "A New Digital Echo Canceller for Two-Wire Full-Duplex Data Transmission"; IEEE Trans. on Communications; vol. COM-24, No. 9; Sep. 1976; pp. 956-962.

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