Patent ID: 7522847
Filing Date: 2009-04-21
Classification: H04B,H04L

Abstract:
1. An optical communication device comprising: a continuous time filter having an adjustable bandwidth and at least one cascaded low pass filter, wherein the continuous time filter is configured to reduce channel induced pre-cursor interference in an incoming data signal and generate a filtered incoming data signal; a decision feedback equalizer, coupled to the continuous time filter, and configured to reduce post-cursor interference in the filtered incoming data signal and output a compensated signal and equalized data, the decision feedback equalizer comprising a summer that is configured to generate the compensated signal by combining an equalized feedback signal with the filtered incoming data signal; and a bandwidth controller configured to receive the compensated signal from the decision feedback equalizer and estimate a bandwidth error of the continuous time filter based thereon, the bandwidth controller further configured to generate a control signal based on the bandwidth error and to adjust the bandwidth of the continuous time filter using the control signal, and thereby reduce the bandwidth error as determined from the decision feedback equalizer, the bandwidth controller comprising: