Systems and methods for multi-rate digital self-interference cancellation

摘要

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.

主权项

1. 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.