Decision feed forward equalization for partial response equalized signal including pre-cursor cancelation
AssigneeNVIDIA Corporation
InventorsVishnu Balan, Viswanath Annampedu, Pervez Mirzra Aziz
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Abstract
A receiver includes a partial response (PR) system that receives a received signal from a transmitter over a channel and equalize the received signal such that there is a controlled relationship between consecutive values of equalized received symbols and transmitted data transmitted by the transmitter. The receiver also includes a decision feed forward equalization (DFFE) system that receives partial response signals from the PR system and cancel at least one of pre-cursor intersymbol interference (ISI) or post-cursor ISI introduced by the channel.
Claims20
A receiver comprising:
- programmable logic to receive user input specifying a number and position of at least one pre-cursor or post-cursor tap to be canceled, and to program a decision feed forward equalization (DFFE) system using the user input;
- a partial response (PR) system to receive a signal from a transmitter over a channel and to equalize the signal such that there is a controlled relationship between consecutive values of equalized received symbols and data transmitted by the transmitter;
- and
- the DFFE system to receive partial response signals from the PR system and to cancel at least one of pre-cursor intersymbol interference (ISI) or post-cursor ISI introduced by the channel.
A system comprising:
- a transmitter;
- and
- a receiver communicatively coupled to the transmitter via a communication channel, wherein the receiver comprises:
- programmable logic to receive user input specifying a number and position of at least one pre-cursor or post-cursor tap to be canceled, and to program a decision feed forward equalization (DFFE) system using the user input;
- a partial response (PR) system to receive a signal from the transmitter over the communication channel and to equalize the signal such that there is a controlled relationship between consecutive values of equalized received symbols and data transmitted by the transmitter;
- and
- the DFFE system to receive partial response signals from the PR system and to cancel at least one of pre-cursor intersymbol interference (ISI) or post-cursor ISI introduced by the communication channel.
A method of operating a receiver, the method comprising:
- receiving user input specifying a number and position of at least one pre-cursor or post-cursor tap to be canceled;
- programming a decision feed forward equalization (DFFE) system using the user input;
- receiving, by a partial response (PR) system, a signal from a transmitter over a channel;
- equalizing, by the PR system, the signal to obtain partial response signals such that there is a controlled relationship between consecutive values of equalized received symbols and data transmitted by the transmitter;
- and
- canceling, by the DFFE system, at least one of pre-cursor intersymbol interference (ISI) or post-cursor ISI introduced by the channel.
Dependencies are inferred from the claim text.