Transmitter equalization
AssigneeCisco Technology, Inc.
InventorsAdee O. Ran, Joel Dror
Life of this patent
Estimating the term…
Abstract
A method includes transmitting, by a transmitter and over a transmit channel to a remote device, a signal that includes a plurality of signal points and receiving, by a receiver and over a receive channel from the remote device, a response signal that includes a plurality of response points corresponding to the plurality of signal points. The method also includes adjusting the plurality of signal points of the signal until logical values of the plurality of response points invert to produce an adjusted signal, estimating, based on the adjusted signal, a pulse response of the transmit channel, and applying equalization in the transmitter based on the estimated pulse response to reduce an effect of the pulse response on the signal.
Claims20
A method comprising:
- transmitting, by a transmitter and over a transmit channel to a remote device, a signal comprising a plurality of signal points;
- receiving, by a receiver and over a receive channel from the remote device, a response signal comprising a plurality of response points corresponding to the plurality of signal points;
- adjusting the plurality of signal points of the signal until logical values of the plurality of response points invert to produce an adjusted signal;
- estimating, based on the adjusted signal, a pulse response of the transmit channel;
- and
- applying equalization in the transmitter based on the estimated pulse response to reduce an effect of the pulse response on the signal.
An apparatus comprising:
- a transmitter configured to transmit, over a channel, a signal comprising a plurality of signal points to a remote device;
- a receiver configured to receive, from the remote device, a response to the signal, wherein the response comprises a plurality of response points corresponding to the plurality of signal points;
- and
- a hardware processor configured to:
- adjust the plurality of signal points of the signal until logical values of the plurality of response points invert to produce an adjusted signal;
- estimate, based on the adjusted signal, a pulse response of the channel;
- and
- apply equalization in the transmitter based on the estimated pulse response to reduce an effect of the pulse response on the signal.
A method comprising:
- transmitting a signal comprising a plurality of signal points;
- receiving a response to the signal, wherein the response comprises a plurality of response points corresponding to the plurality of signal points;
- adjusting the plurality of signal points of the signal until logical values of the plurality of response points invert to produce an adjusted signal;
- and
- applying equalization at a transmitter based on the adjusted signal.
Dependencies are inferred from the claim text.