Digital computing device for a data transmission...

Details Digital computing device for a data transmission... Digital computing device for a data transmission...

H - Electricity

04

B

354/67

H04B 3/23 (2006.01) G06F 17/15 (2006.01) H03H 17/02 (2006.01) H04L 25/03 (2006.01)

Patent

CA 1314997

ABSTRACT OF THE DISCLOSURE A device for real time computing of a sum of terms having the form .SIGMA.h(iT).qe((n-i)T) is suitable for use in an echo canceller for a data transmission system using code 2B 1Q. The device first transforms each of the successive estimated values of ?e into transformed values ??e which are powers of two, by adding or sub- tracting 1. The successive elementary products each obtained by a shift of h by an amount selected in response to the respective value of q?e. The elementary products are summed in a register.

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