Echo canceller for two-wire pull duplex data transmission

Details Echo canceller for two-wire pull duplex data transmission Echo canceller for two-wire pull duplex data transmission

H - Electricity

04

B

354/233, 379/3,

H04B 3/20 (2006.01) H04B 3/23 (2006.01) H04L 5/14 (2006.01) H04M 3/18 (2006.01) H04M 11/00 (2006.01)

Patent

CA 1063744

ECHO CANCELLER FOR TWO-WIRE FULL DUPLEX DATA TRANSMISSION Abstract of the Disclosure An adaptive echo canceller for digital data transmission systems permits full duplex, i.e., simultaneous bidirectional transmission, operation at full bandwidth over two-wire transmission facilities. A transversal filter arrangement digitally synthesizes a cancellation signal for unwanted leakage, i.e., echoes, through hybrid junctions directly from the digital data input symbols, rather than from the analog transmitter output. An error control signal for correlation with tap signals on the transversal filter is derived from the output of the receiver, instead of its input.

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