Systems and methods for intelligently-tuned digital self-interference cancellation
First Claim
1. A system for digital self-interference cancellation comprising:
- a filter coupled to a digital residue signal of a communication system that reduces noise, thereby generating a first reduced-noise digital residue signal;
a channel estimator coupled to the filter that generates a current self-interference channel estimate from a sampled digital transmit signal, the first reduced-noise digital residue signal, and past self-interference channel estimates;
wherein the channel estimator generates the current self-interference channel estimate according to a digital transform configuration;
a controller that dynamically sets the digital transform configuration in response to changes in a controller-sampled digital residue signal;
a channel memory, coupled to the channel estimator, that stores the past self-interference channel estimates; and
a predictor that modifies output of the channel estimator to compensate for a first time delay incurred in tuning the system for digital self-interference cancellation;
wherein the system generates a digital self-interference cancellation signal from the current self-interference channel estimate and the sampled digital transmit signal;
wherein the digital self-interference cancellation signal is combined with a receive signal of the communication system to form the digital residue signal.
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Abstract
A system for digital self-interference cancellation includes a filter that generates a reduced-noise digital residue signal; a channel estimator that generates a current self-interference channel estimate from a digital transmit signal, the reduced-noise digital residue signal, and past self-interference channel estimates; a controller that dynamically sets the digital transform configuration in response to changes in a controller-sampled digital residue signal; a predictor that modifies output of the channel estimator to compensate for a first time delay incurred in tuning the system for digital self-interference cancellation; and a channel memory that stores the past self-interference channel estimates.
350 Citations
18 Claims
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1. A system for digital self-interference cancellation comprising:
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a filter coupled to a digital residue signal of a communication system that reduces noise, thereby generating a first reduced-noise digital residue signal; a channel estimator coupled to the filter that generates a current self-interference channel estimate from a sampled digital transmit signal, the first reduced-noise digital residue signal, and past self-interference channel estimates;
wherein the channel estimator generates the current self-interference channel estimate according to a digital transform configuration;a controller that dynamically sets the digital transform configuration in response to changes in a controller-sampled digital residue signal; a channel memory, coupled to the channel estimator, that stores the past self-interference channel estimates; and a predictor that modifies output of the channel estimator to compensate for a first time delay incurred in tuning the system for digital self-interference cancellation;
wherein the system generates a digital self-interference cancellation signal from the current self-interference channel estimate and the sampled digital transmit signal;
wherein the digital self-interference cancellation signal is combined with a receive signal of the communication system to form the digital residue signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification