Method of cancelling listener echo in a digital data receiver, a

Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network

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333 18, H04B 322

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active

046137319

ABSTRACT:
A listener echo canceller for a receiver made to receive data symbols a.sub.n transmitted at regular time intervals T. The received wave is first conventionally decoded to derive the received symbols therefrom, said symbols are the subjected to a bulk delay which has been determined for shifting the listener echo impulse response to the time reference origin. The delayed symbols are then processed to generate an echo replica which replica is then fedback to the decoder input for being subtracted therefrom.

REFERENCES:
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patent: 3962637 (1976-06-01), Motley et al.
patent: 4024342 (1977-05-01), Croisier et al.
patent: 4106102 (1978-08-01), Desblache
patent: 4243935 (1981-01-01), McCool et al.
patent: 4309770 (1982-01-01), Godard
patent: 4329655 (1982-05-01), Nojima et al.
"The Synchronous Adaptive Kalman Receiver for Carrier Modulation Systems", Gaurdincerri et al., Cselt/Rapporti Technic, vol. 4, No. 1, pp. 59-63, Mar. 1976.

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