Systems and methods for multi-rate digital self-interference cancellation
AssigneeKumu Networks, Inc.
InventorsDinesh Bharadia, Jung-Il Choi, Mayank Jain, Rajendra Tushar Moorti
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Abstract
A system for multi-rate digital self-interference cancellation including a signal component generation system coupled to a digital transmit signal of a communication system that generates a set of signal components from the digital transmit signal; a multi-rate adaptive filter that transforms the set of signal components into a digital self-interference cancellation signal, according to a transform configuration, to form an interference-reduced receive signal; and a transform adaptor that dynamically sets the transform configuration in response to changes in the interference-reduced receive signal.
Claims22
A system for multi-rate digital self-interference cancellation comprising:
- a signal component generation system coupled to a digital transmit signal of a communication system that generates a set of signal components from the digital transmit signal;
- wherein the signal component generation system comprises a set of transform paths;
- wherein each transform path comprises a component generator and an anti-aliasing filter;
- wherein a majority of the set of transform paths further comprise an upsampler, a downsampler, and a signal multiplier;
- wherein signal multipliers couple transform paths to at least one other transform path;
- a multi-rate adaptive filter that transforms the set of signal components into a digital self-interference cancellation signal according to a transform configuration, wherein the digital self-interference cancellation signal is combined with a receive signal of the communication system to form an interference-reduced receive signal;
- and
- a transform adaptor that dynamically sets the transform configuration in response to changes in the interference-reduced receive signal.
A method for multi-rate digital self-interference cancellation comprising:
- receiving a digital transmit signal of a communication system;
- generating a set of signal components from the digital transmit signal;
- wherein generating the set of signal components comprises:
- generating a first signal component by upsampling the digital transmit signal;
- performing signal component generation, according to a self-interference model, on the upsampled digital transmit signal;
- downsampling the generated signal component;
- and
- performing anti-aliasing filtering on the downsampled signal component;
- transforming the set of signal components into a digital self-interference cancellation signal according to a transform configuration;
- combining the digital self-interference cancellation signal with a receive signal of the communication system to form an interference-reduced receive signal;
- and
- dynamically adapting the transform configuration in response to changes in the interference-reduced receive signal.
Dependencies are inferred from the claim text.