Pulse or digital communications – Repeaters – Testing
Patent
1989-11-17
1992-05-05
Olms, Douglas W.
Pulse or digital communications
Repeaters
Testing
375 12, 375 99, 375103, 333 28R, H04B 304, H04B 314
Patent
active
051114810
ABSTRACT:
A dual mode LMS channel equalizer is disclosed. The inventive channel equalizer utilizes an LMS algorithm to both identify channel parameters and to smooth the received data signal to mitigate the effects of channel additive noise. In real time operation, the inventive equalizer first identifies the channel parameters in a training period. Thereafter, the same LMS algorithm is switched to smooth the received data signal, while intermittently, the LMS algorithm is switched back to track the slowly changing channel parameters. In comparison with the conventional LMS adaptive channel equalizer, the inventive dual mode channel equalizer achieves a significant performance improvement at little additional cost.
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Chen Walter Y.
Haddad Richard A.
Nynex Corporation
Olms Douglas W.
Rubenstein Kenneth
Smith Ralph
Swingle Loren C.
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