Patent ID: 7450636
Filing Date: 2008-11-11
Classification: H03H,H04L

Abstract:
1. An adaptive transmit equalizer of a transmitter for equalizing digital symbols to be transmitted by the transmitter over a communications channel to a receiver, the equalizer comprising: a transmit filter having an associated register for storing at least one filter coefficient, said at least one filter coefficient stored in the register being received in the transmitter via the communications channel from a tuning engine of the receiver, wherein the transmit filter compensates for distortion in the communications channel, and wherein the tuning engine generates performance metric values based on digital symbols received through the communications channel from the transmitter, wherein the performance metric values include a weighted combination of individual performance metrics including vertical eye opening values and clock jitter values, the tuning engine using a simplex algorithm that identifies said at least one new filter coefficient based on the performance metric values.