| US 7,570,685 B2 | ||
| System, method and apparatus for crosstalk cancellation | ||
| Hiroshi Takatori, 932 S. Beach Dr., Sacramento, Calif. 95831 (US); Kenneth C. Dyer, 3040 Prado La., Davis, Calif. 95616 (US); and Mark Callicotte, 7628 Windbridge Dr. #70, Sacramento, Calif. 95831 (US) | ||
| Filed on Oct. 05, 2004, as Appl. No. 10/959,622. | ||
| Claims priority of provisional application 60/509434, filed on Oct. 06, 2003. | ||
| Prior Publication US 2005/0074055 A1, Apr. 07, 2005 | ||
| Int. Cl. H04B 1/38 (2006.01) | ||
| U.S. Cl. 375—219 [375/222; 370/201; 370/286; 455/63.1] | 18 Claims |
| 1. A method for crosstalk cancellation in a system comprising
a transceiver 2 having a transmitter T2 and a receiver R2,
a transceiver 3 having a transmitter T3 and a receiver R3,
a transceiver 4 having a transmitter T4 and a receiver R4, and at least one communication path P1, wherein
said transceiver 2 and said transceiver 4 communicate through said communication path P1, said method comprising, in no particular order,
placing an insertion block between said transmitter T2 and said receiver R2 for inserting an error signal at said receiver R2 into said communication path P1;
placing a far-end crosstalk (FEXT) canceller FC32 at said transmitter T4, said FEXT canceller FC32 comprising a finite impulse response (FIR) filter;
connecting said FIR filter to said receiver R4 for obtaining said error signal;
connecting said FIR filter to said transmitter T3 for obtaining transmit data thereof;
correlating said error signal and said transmit data; and
adapting said FEXT canceller FC32 based on said correlating step to compensate far-end crosstalk at said receiver R2.
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