A New Digital Echo Canceler for Two-Wire Subscriber Lines
- 1 November 1981
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Communications
- Vol. 29 (11) , 1573-1581
- https://doi.org/10.1109/tcom.1981.1094923
Abstract
A new type of digital echo canceler for two-wire digital transmission is presented. The new principle involves very simple signal processing and is thus an interesting alternative for digital transmission on subscriber lines. The principle is compared with other echo cancellation techniques, and it is shown how choice of line code, equalization, and carrier recovery are affected by the new echo canceler. A theoretical analysis of the principle is given, taking into account finite accuracy, jitter, noise, and correlated data streams. The echo canceler can be used for line attenuation up to 40 dB. At 80 kbits/s this corresponds to at least 7 km 0.6 mm cable and is sufficient to cover more than 99 percent of the existing Norwegian subscriber lines.Keywords
This publication has 4 references indexed in Scilit:
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- Digital echo cancellation for baseband data transmissionIEEE Transactions on Acoustics, Speech, and Signal Processing, 1979
- Digital adaptive filters: Conditions for convergence, rates of convergence, effects of noise and errors arising from the implementationIEEE Transactions on Information Theory, 1979
- A Digital Subscriber SetIEEE Transactions on Communications, 1979