PAM data communication with reflection cancellation

摘要

The present invention is directed to data communication systems and methods. More specifically, embodiments of the present invention provide a communication system that removes reflection signals. A digital data stream is processed through both tentative path and the main path. The tentative path uses a first DFE device and a reflection cancellation circuit to generate a correction signal for removing reflection signal from the digital data stream. A second DFE device removes ISI and other noises from the corrected digital data stream. There are other embodiments as well.

主权项

1. A communication system, the system comprising:
an input receiver device for receiving an analog data stream; an analog to digital converter (ADC) device coupled to the input receiver device, the ADC device being configured to convert the analog data stream to a digital data stream, the digital data stream comprising a first signal and a first noise profile associated with the first signal, the first noise profile including inter-symbol interference (ISI) noise signals and reflection signals; a feed forward equalizer (FFE) device coupled to the ADC device and configured to be connected/coupled to a tentative signal path and a main signal path; a first decision feedback equalizer (DFE) device configured to be connected/coupled to an output of the feed forward equalizer device through the tentative signal path, the first DFE being configured to remove at least a first portion of the ISI noise signals; an adder device configured to connect the tentative signal path and the main signal path and output an intermediate signal; and a reflection canceller circuit coupled to the first DFE device and configured to be connected/coupled to the main signal path through the adder device, the reflection canceller circuit being configured to input a plurality of correction signals, the correction signals being configured to cancel a second portion of the ISI noise signal and reflection signal signals traversing through the main signal path, the reflection canceller circuit comprising a filter and an error generation module.