Circuit and method for finding the sampling phase and...

Pulse or digital communications – Equalizers – Automatic

Reexamination Certificate

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Reexamination Certificate

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09572155

ABSTRACT:
A circuit determines a sampling phase of a sampling clock of an analog-to-digital converter in a receiver of a communication system. The apparatus adjusts the sampling clock of an analog-to-digital converter in a receiver of a communication system based on the determined sampling phase of the sampling clock to remove a first intersymbol interference from a signal received by the receiver. An open loop filter removes any remaining intersymbol interference from the received signal. This is to insure that the receiver within a communication system that the adaptive equalization necessary to eliminate precursor and postcursor intersymbol interference is decoupled and independent.

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Lin et al., “Adaptive Nonlinear Decision Feedback Equalization with Channel Estimation and Timing Recovery in Digital Magnetic Recording Systems”, IEEE Trans. on Circuits and Systems-II: Analog and Digital Signal Processing, vol. 42, No. 3, Mar. 1995, pp. 196-206.

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