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US 8,077,642 B2Granted
Methods and apparatus for signal echo cancellation and transmitter calibration in full duplex systems
AssigneeIntel Corporation
InventorEhud Shoor
Life of this patent
Estimating the term…
Abstract
A method includes transmitting a first signal over a network from a first communication link to a second communication link. The method further includes receiving a second signal with the first communication link from the second communication link. The method further includes canceling signal echo from the first signal present in the second signal with a digital echo canceller. The method further includes providing correction data from a memory array to the digital echo canceller during the cancellation of the signal echo. An associated apparatus is also disclosed.
Claims13
A method comprising:
- transmitting a first signal over a network from a first communication link to a second communication link,
- receiving a second signal with the first communication link from the second communication link,
- canceling signal echo from the first signal present in the second signal with a digital echo canceller, and
- providing correction data from a memory array to the digital echo canceller during the cancellation of the signal echo.
1 more element
An apparatus comprising:
- an analog transmitter having an input and an output,
- a memory array, the memory array having a first input defined as the input of the analog transmitter, a second input, and an output to provide correction data,
- a digital echo canceller having a first input defined as the output of the memory array, a second input, a first output defining the second input of the memory array to provide update data to the memory array, and a second output to provide a signal indicative of predicted signal echo, and
- a receiver having an input for receiving a transmitted signal, wherein the second output of the digital echo canceller is subtracted from the transmitted signal to create a cleaned signal, the cleaned signal defining the second input of the digital echo canceller.
1 more element
Dependencies are inferred from the claim text.