Apparatus and method for interference cancellation in communication systems
AssigneeAT&T Intellectual Property I, L.P.
InventorsVaneet Aggarwal, Dinesh Bharadia, Rittwik Jana, Christopher W. Rice, Nemmara K. Shankaranarayanan
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Abstract
A system that incorporates the subject disclosure may include, for example, determining channel gains for a group of transmitters based on transmitted training symbols; and performing analog time domain cancellation and digital time domain cancellation responsive to a determination that a total interference does not satisfy a threshold range of the analog-to-digital converter, where the total interference is determined based on the channel gains. Other embodiments are disclosed.
Claims20
A method comprising:
- receiving, by a system including a processor, a group of signals from a group of transmitters, wherein each of the group of signals includes training symbols according to an orthogonal frequency-division multiplexing protocol;
- determining, by the system, a channel gain for each of the group of signals;
- determining, by the system, a total interference based on the channel gain;
- determining, by the system, whether the total interference satisfies a threshold range of an analog-to-digital converter of the system;
- performing, by the system, digital time domain cancellation without performing analog time domain cancellation responsive to a determination that the total interference satisfies the threshold range;
- and
- performing, by the system, the analog time domain cancellation and the digital time domain cancellation responsive to a determination that the total interference does not satisfy the threshold range.
A device, comprising:
- a non-transitory memory that stores instructions;
- an analog-to-digital converter;
- and
- a processor coupled with the memory and the analog-to-digital converter, wherein responsive to executing the instructions, the processor performs operations comprising:
- determining channel gains for a group of transmitters based on training symbols associated with the group of transmitters;
- and
- selectively performing analog time domain cancellation and digital time domain cancellation responsive to a determination that a total interference does not satisfy a threshold range of the analog-to-digital converter, wherein the total interference is determined based on the channel gains.
A non-transitory computer-readable storage device comprising computer instructions, which, responsive to being executed by a processor, cause the processor to perform operations comprising:
- determining channel gains for a group of transmitters based on transmitted training symbols;
- and
- performing analog time domain cancellation and digital time domain cancellation responsive to a determination that a total interference does not satisfy a threshold range of an analog-to-digital converter,
- wherein the total interference is determined based on the channel gains.
Dependencies are inferred from the claim text.