Partial echo cancellation duplexing
AssigneeIntel Corporation
InventorsRainer Strobel, Vladimir Oksman
Life of this patent
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Abstract
Methods, circuitries, and systems for transmitting data upstream between a first device and a second device and downstream between the second device and the first device are disclosed. A method includes determining an upstream crosstalk effect for an upstream channel and determining a downstream crosstalk effect for a downstream channel. The crosstalk effect includes near end crosstalk from a third device that is non-co-located with respect to the first device and the second device. A data rate of an upstream transmission or downstream transmission is adjusted based on the upstream crosstalk effect and the downstream crosstalk effect.
Claims16
A partial echo cancellation duplexing system, comprising:
- a channel estimation circuitry configured to:
- determine an upstream crosstalk effect for an upstream channel between a first device and a second device;
- and
- determine a downstream crosstalk effect for a downstream channel between the first device and the second device;
- wherein the upstream crosstalk effect, the downstream crosstalk effect, or both, includes near end crosstalk from a third device that is non-co-located with respect to the first device and the second device;
- and
- a partial echo cancellation duplexing circuitry configured to adjust a data rate of an upstream transmission or downstream transmission based on the upstream crosstalk effect and the downstream crosstalk effect,
- wherein the channel estimation circuitry is configured to determine the upstream crosstalk effect and the downstream crosstalk effect based on:
- transmissions of an upstream data frame and a downstream data frame, wherein one or both of the upstream data frame and the downstream data frame include a synchronization symbol or a quiet symbol in a first symbol position;
- and
- measurement of one or more of a downstream channel signal-to-noise ratio (SNR), an upstream channel SNR, a downstream channel far end crosstalk coupling, an upstream channel far end crosstalk coupling, a downstream channel near end crosstalk coupling, and an upstream channel near end crosstalk during the first symbol position.
A method to transmit data upstream between a first device and a second device and downstream between the second device and the first device, comprising:
- determining an upstream crosstalk effect for an upstream channel;
- determining a downstream crosstalk effect for a downstream channel;
- wherein the upstream crosstalk effect, the downstream crosstalk effect, or both, includes near end crosstalk from a third device that is non-co-located with respect to the first device and the second device;
- and
- based on the upstream crosstalk effect and the downstream crosstalk effect, adjusting a data rate of an upstream transmission or downstream transmission,
- wherein determining the upstream crosstalk effect and determining the downstream crosstalk effect comprise:
- transmitting an upstream data frame and a downstream data frame, wherein one or both of the upstream data frame and the downstream data frame include a synchronization symbol or a quiet symbol in a first symbol position;
- and
- measuring one or more of a downstream channel signal-to-noise ratio (SNR), an upstream channel SNR, a downstream channel far end crosstalk coupling, an upstream channel far end crosstalk coupling, a downstream channel near end crosstalk coupling, and an upstream channel near end crosstalk during the first symbol position.
Dependencies are inferred from the claim text.