| US 7,483,481 B1 | ||
| System and method for adaptively updating precoder taps | ||
| Ayman Ghobrial, Huntsville, Ala. (US); Fred Chu, Madison, Ala. (US); Michael D. Turner, Huntsville, Ala. (US); and Kevin W. Schneider, Huntsville, Ala. (US) | ||
| Assigned to Adtran, Inc., Huntsville, Ala. (US) | ||
| Filed on Aug. 31, 2004, as Appl. No. 10/930,343. | ||
| Int. Cl. H03H 7/30 (2006.01) | ||
| U.S. Cl. 375—233 [375/232; 375/350; 375/222; 348/607] | 46 Claims |
| 1. A system for enabling adaptive precoder updates, comprising:
a first signal path configured to receive encoded signals, the first signal path having a decoder configured to decode the
encoded signals thereby recovering data originally transmitted from a remote transmitter;
a delay mechanism configured to receive and delay the encoded signals;
a second signal path connected in parallel with the first signal path and configured to receive the encoded signals delayed
by the delay mechanism, the second signal path having an adaptive filter configured to filter the encoded signals received
by the second signal path based on a set of coefficients of the adaptive filter, the adaptive filter configured to adaptively
update the coefficients based on the data recovered by the first signal path; and
logic configured to adaptively generate new precoder taps based on the coefficients and to transmit the new precoder taps
to a precoder,
wherein the first and second signal paths are configured such that the signals filtered by the adaptive filter are not combined
with signals to be decoded by the decoder.
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