Systems and methods for tunable out-of-band interference mitigation
First Claim
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1. A system for interference mitigation comprising:
- a first transmit coupler, communicatively coupled to an analog transmit signal of a communication system, that splits the analog transmit signal into a first-path analog transmit signal and a second-path analog transmit signal;
a first receive-band filter that filters the first-path analog transmit signal in the receive band prior to processing by the receive-band noise cancellation system, resulting in reduced signal power outside of the receive band;
a receive-band noise cancellation system that samples the first-path analog transmit signal and generates a receive-band noise cancellation signal from the first-path analog transmit signal;
wherein the receive-band noise cancellation system introduces a first noise component in the transmit band of the receive-band noise cancellation signal;
a second receive-band filter that filters the receive-band noise cancellation signal, resulting in reduced signal power outside of the receive band and in reduction of the first noise component;
a first transmit-band filter that filters the second-path analog transmit signal in a transmit band, resulting in reduced signal power outside of the transmit band;
a second transmit coupler that combines the receive-band noise cancellation signal and the second-path analog transmit signal, resulting in generation of a reduced-noise analog transmit signal;
wherein the reduced-noise analog transmit signal has further reduced signal power in a receive band relative to the second-path analog transmit signal;
a first receive coupler, communicatively coupled to an analog receive signal of the communication system, that splits the analog receive signal into a first-path analog receive signal and a second-path analog receive signal;
a transmit-band noise cancellation system that samples the first-path analog receive signal and generates a transmit-band noise cancellation signal from the first-path analog receive signal;
a third receive-band filter that filters the second-path analog receive signal in the receive band, resulting in reduced signal power outside of the receive band; and
a second receive coupler that combines the transmit-band noise cancellation signal and the second-path analog receive signal, resulting in generation of a reduced-noise analog receive signal;
wherein the reduced-noise analog receive signal has further reduced signal power in a transmit band relative to the second-path analog receive signal.
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Abstract
A system for interference mitigation includes: a first transmit coupler; a receive-band noise cancellation system; a first transmit-band filter; a second transmit coupler; a first receive coupler; a transmit-band noise cancellation system; a first receive-band filter; and a second receive coupler.
333 Citations
20 Claims
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1. A system for interference mitigation comprising:
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a first transmit coupler, communicatively coupled to an analog transmit signal of a communication system, that splits the analog transmit signal into a first-path analog transmit signal and a second-path analog transmit signal; a first receive-band filter that filters the first-path analog transmit signal in the receive band prior to processing by the receive-band noise cancellation system, resulting in reduced signal power outside of the receive band; a receive-band noise cancellation system that samples the first-path analog transmit signal and generates a receive-band noise cancellation signal from the first-path analog transmit signal;
wherein the receive-band noise cancellation system introduces a first noise component in the transmit band of the receive-band noise cancellation signal;a second receive-band filter that filters the receive-band noise cancellation signal, resulting in reduced signal power outside of the receive band and in reduction of the first noise component; a first transmit-band filter that filters the second-path analog transmit signal in a transmit band, resulting in reduced signal power outside of the transmit band; a second transmit coupler that combines the receive-band noise cancellation signal and the second-path analog transmit signal, resulting in generation of a reduced-noise analog transmit signal;
wherein the reduced-noise analog transmit signal has further reduced signal power in a receive band relative to the second-path analog transmit signal;a first receive coupler, communicatively coupled to an analog receive signal of the communication system, that splits the analog receive signal into a first-path analog receive signal and a second-path analog receive signal; a transmit-band noise cancellation system that samples the first-path analog receive signal and generates a transmit-band noise cancellation signal from the first-path analog receive signal; a third receive-band filter that filters the second-path analog receive signal in the receive band, resulting in reduced signal power outside of the receive band; and a second receive coupler that combines the transmit-band noise cancellation signal and the second-path analog receive signal, resulting in generation of a reduced-noise analog receive signal;
wherein the reduced-noise analog receive signal has further reduced signal power in a transmit band relative to the second-path analog receive signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification