Apparatus and method for effectively eliminating the echo signal

Details Apparatus and method for effectively eliminating the echo signal Apparatus and method for effectively eliminating the echo signal

1995-04-18

1996-11-19

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

379411, H04B 323

Patent

active

055770274

ABSTRACT:
In a data transmission system that transmits a transmitting signal to an external network and receives a receiving signal plus an echo signal of the transmitting signal from the network, a method of eliminating the echo signal from the receiving signal includes the step of time interpolating samples of the transmitting signal at a sampling rate of the receiving signal before the transmitting signal is sent to the network. A replica signal of the echo signal is generated using the interpolated samples of the transmitting signal to cancel the echo signal from the receiving signal after the receiving and echo signals are also time interpolated at the sampling rate of the receiving signal. An apparatus for eliminating the echo signal from the receiving signal is also described.

REFERENCES:
patent: 5353279 (1994-10-01), Koyama
patent: 5414766 (1995-05-01), Cannalire
patent: 5446728 (1995-08-01), Lomark

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