Systems for multi-peak-filter-based analog self-interference cancellation
First Claim
Patent Images
1. A system for multi-peak filter-based analog self-interference cancellation comprising:
- a transmit coupler, communicatively coupled to an analog transmit signal of a communication system, that samples the analog transmit signal to create a sampled analog transmit signal;
an analog self-interference canceller, comprising a first signal divider, first and second filters, first, second, and third scalers, and a first signal combiner, wherein the first signal divider splits the analog transmit signal into first, second, and third signal paths;
wherein the first filter filters the first signal path and the first scaler scales the first signal path to create a first analog self-interference signal component;
wherein the second filter filters the second signal path and the second scaler scales the second signal path to create a second analog self-interference signal component;
wherein the third signal path is unfiltered and the third scaler scales the third signal path to create a third analog self-interference signal component;
wherein the first filter has a single peak centered at a first frequency;
wherein the second filter has exactly two peaks centered at a second frequency and a third frequency respectively;
wherein the first frequency is twice the second frequency;
wherein the third frequency is three times the second frequency;
wherein the first signal combiner combines the first, second, and third analog self-interference signal components to form a first analog self-interference cancellation signal;
a receive coupler, communicatively coupled to an analog receive signal of the communication system, that combines the first analog self-interference cancellation signal with the analog receive signal.
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Abstract
A system for multi-peak filter-based analog self-interference cancellation includes a transmit coupler that samples the analog transmit signal to create a sampled analog transmit signal; an analog self-interference canceller, using multi-peak filters, that generates an analog self-interference cancellation signal; and a receive coupler that combines the analog self-interference cancellation signal with the analog receive signal.
175 Citations
23 Claims
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1. A system for multi-peak filter-based analog self-interference cancellation comprising:
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a transmit coupler, communicatively coupled to an analog transmit signal of a communication system, that samples the analog transmit signal to create a sampled analog transmit signal; an analog self-interference canceller, comprising a first signal divider, first and second filters, first, second, and third scalers, and a first signal combiner, wherein the first signal divider splits the analog transmit signal into first, second, and third signal paths;
wherein the first filter filters the first signal path and the first scaler scales the first signal path to create a first analog self-interference signal component;
wherein the second filter filters the second signal path and the second scaler scales the second signal path to create a second analog self-interference signal component;
wherein the third signal path is unfiltered and the third scaler scales the third signal path to create a third analog self-interference signal component;
wherein the first filter has a single peak centered at a first frequency;
wherein the second filter has exactly two peaks centered at a second frequency and a third frequency respectively;
wherein the first frequency is twice the second frequency;
wherein the third frequency is three times the second frequency;
wherein the first signal combiner combines the first, second, and third analog self-interference signal components to form a first analog self-interference cancellation signal;a receive coupler, communicatively coupled to an analog receive signal of the communication system, that combines the first analog self-interference cancellation signal with the analog receive signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for multi-peak filter-based analog self-interference cancellation comprising:
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a transmit coupler, communicatively coupled to an analog transmit signal of a communication system, that samples the analog transmit signal to create a sampled analog transmit signal; an analog self-interference canceller, comprising a first signal divider, first and second filters, first, second, and third scalers, and a first signal combiner, wherein the first signal divider splits the analog transmit signal into first, second, and third signal paths;
wherein the first filter filters the first signal path and the first scaler scales the first signal path to create a first analog self-interference signal component;
wherein the second filter filters the second signal path and the second scaler scales the second signal path to create a second analog self-interference signal component;
wherein the third signal path is unfiltered and the third scaler scales the third signal path to create a third analog self-interference signal component;
wherein the first filter has a single peak centered at a first frequency;
wherein the second filter has exactly two peaks centered at a second frequency and a third frequency respectively;
wherein the first signal combiner combines the first, second, and third analog self-interference signal components to form a first analog self-interference cancellation signal;a receive coupler, communicatively coupled to an analog receive signal of the communication system, that combines the first analog self-interference cancellation signal with the analog receive signal. - View Dependent Claims (21, 22, 23)
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Specification