| US 7,577,697 B2 | ||
| Measurement of equalizer span alignment with respect to channel condition | ||
| Tomasz Thomas Prokop, Glenhaven (Australia); and Dominic Wing-Kin Yip, Carlingford (Australia) | ||
| Assigned to Agere Systems Inc., Allentown, Pa. (US) | ||
| Filed on Apr. 26, 2005, as Appl. No. 11/114,025. | ||
| Prior Publication US 2006/0239340 A1, Oct. 26, 2006 | ||
| Int. Cl. G06F 17/10 (2006.01) | ||
| U.S. Cl. 708—323 | 22 Claims |
| 3. An apparatus, comprising:
a linear transversal equalizer for transforming an input signal into an equalized signal, wherein:
the input signal is tapped to obtain a plurality of variously delayed taps;
each tap of said plurality of taps is weighted by a respective weight of a plurality of weights to form a respective weighted
tap; and
the weighted taps are combined to form the equalized signal; and
an alignment module for aligning a span of said plurality of variously delayed taps with a temporal spread of the input signal,
wherein:
a plurality of first values, each corresponding to a weight from said plurality of weights, are multiplied with a corresponding
plurality of second values, each corresponding to a predefined function, to form a plurality of alignment products;
the predefined function has one or more zeros at locations intended for largest of the weights; and
said alignment products are combined to form an alignment measure based on which the span is aligned with the temporal spread.
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