A data-driven multitone echo canceller

A data-driven echo canceller for full-duplex data transmission with multitone modulation is presented. This multitone echo canceller (MTEC) is not impaired by eigenvalue-spread problems that are inherent in signal-driven echo cancellers-it has numerical performance and cancellation range that equals...

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Bibliographic Details
Published in:IEEE transactions on communications 1994-10, Vol.42 (10), p.2853-2869
Main Authors: Cioffi, J.M., Bingham, J.A.C.
Format: Article
Language:English
Subjects:
Bit error rate
Echo cancellers
Eigenvalues and eigenfunctions
Frequency estimation
Modems
Protocols
Pulse modulation
Quadrature amplitude modulation
Senior members
Time domain analysis
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Summary:A data-driven echo canceller for full-duplex data transmission with multitone modulation is presented. This multitone echo canceller (MTEC) is not impaired by eigenvalue-spread problems that are inherent in signal-driven echo cancellers-it has numerical performance and cancellation range that equals, and in most cases exceeds, that of data-driven echo cancellers used in data transmission with baseband or quadrature amplitude modulation. The method makes use of frequency-domain updating, but time-domain implementation of the canceller. It introduces no delay into the received signal path and presents no special difficulties for interframe interpolation between near-end echo, far-end echo, or far-end data signal. The authors also investigate the fast initialization and the special case of far-end frequency offset in the echo signal.< >
ISSN:0090-6778
1558-0857
DOI:10.1109/26.328955