By Topic

Decision-directed echo cancellation for full-duplex data transmission at 4800bps

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Quatieri, T.F. ; Massachusetts Institute of Technology, Lexington, Massachusetts ; O'Leary, G.C.

In this paper, we present a design for a full-duplex near-echo-cancelling data modem based on a cambined "decision-directed" (DD) adaptive echo canceller and adaptive channel equalizer. This algorithm has the important feature that the interference to the canceller caused by the far-end signal is eliminated by subtracting an estimate of the far-end signal based on receiver decisions. This technique is extended to provide a new approach to full-duplex far-echo cancellation in which frequency offset of the far echo is adaptively estimated with little interference from the far-end signal and near echo. The approach uses receiver decisions on the far-end signal, but in addition, relies on a separate receiver structure devoted to joint estimation of the far-echo channel and the frequency offset in the far echo. The feasibility of both echo-cancelling modem algorithms is demonstrated by computer simulation with realistic channel distortions and with 4800 bps data transmission at which rate frequency offset in the far echo becomes important.

Published in:

Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '86.  (Volume:11 )

Date of Conference:

Apr 1986