Systems and methods for out-of-band interference mitigation
First Claim
1. A system for out-of-band interference mitigation comprising:
- a transmit digital canceller, communicatively coupled to a digital transmit signal of a communication system, that samples and then transforms the digital transmit signal to create a first digital interference cancellation signal;
wherein the transmit digital canceller transforms the digital transmit signal according to a first configuration state;
wherein the digital transmit signal is ultimately upconverted by the communication system to a radio frequency (RF) transmit signal having a first RF carrier frequency in a transmit band;
a first digital-to-analog-converter (DAC) that converts the first digital interference cancellation signal to a first baseband (BB) interference cancellation signal;
a first frequency upconverter that converts the first BB interference cancellation signal to a first RF interference cancellation signal having the first RF carrier frequency in the transmit band;
a first receive coupler, communicatively coupled to an RF receive signal of the communication system having a second RF carrier frequency in a receive band, that combines, in order to remove a first portion of interference in the transmit band, the first RF interference cancellation signal and the RF receive signal to generate a composite RF receive signal;
wherein the composite RF receive signal is ultimately downconverted by the communication system to a composite digital receive signal;
a sampling digital canceller, communicatively coupled to the digital transmit signal of the communication system, that samples and then transforms the digital transmit signal to create a second digital interference cancellation signal;
wherein the sampling digital canceller transforms the digital transmit signal according to a second configuration state;
a second DAC that converts the second digital interference cancellation signal to a second BB interference cancellation signal;
a second frequency upconverter that converts the second BB interference cancellation signal to a second RF interference cancellation signal having the first RF carrier frequency in the transmit band;
a cleaning coupler that combines, in order to remove interference in the transmit band, the RF transmit signal and the second RF interference cancellation signal to generate a cleaned RF transmit signal;
a first frequency downconverter that converts the cleaned RF transmit signal to a cleaned BB transmit signal;
a first analog-to-digital-converter (ADC) that converts the cleaned BB transmit signal to a cleaned digital transmit signal;
a receive-band digital canceller that converts the cleaned digital transmit signal to a third digital interference cancellation signal;
wherein the receive-band digital canceller transforms the cleaned digital transmit signal according to a third configuration state;
wherein the third digital interference cancellation signal is combined with the composite digital receive signal in order to remove a second portion of interference in the receive band.
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Accused Products
Abstract
A system for interference mitigation including a transmit coupler that samples the RF transmit signal to create a sampled RF transmit signal; a transmit analog canceller that transforms the RF transmit signal to an RF interference cancellation signal, according to a first configuration state; a first receive coupler that combines the RF interference cancellation signal and the RF receive signal to generate a composite RF receive signal; a sampling analog interference filtering system that, in order to remove interference in the transmit band, filters the sampled RF transmit signal to generate a cleaned transmit signal; a first frequency downconverter that converts the transmit signal to a BB transmit signal; a second frequency downconverter that converts the composite RF receive signal to a composite BB receive signal; and an analog-to-digital converter that converts the transmit signal to a digital transmit signal.
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Citations
16 Claims
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1. A system for out-of-band interference mitigation comprising:
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a transmit digital canceller, communicatively coupled to a digital transmit signal of a communication system, that samples and then transforms the digital transmit signal to create a first digital interference cancellation signal;
wherein the transmit digital canceller transforms the digital transmit signal according to a first configuration state;
wherein the digital transmit signal is ultimately upconverted by the communication system to a radio frequency (RF) transmit signal having a first RF carrier frequency in a transmit band;a first digital-to-analog-converter (DAC) that converts the first digital interference cancellation signal to a first baseband (BB) interference cancellation signal; a first frequency upconverter that converts the first BB interference cancellation signal to a first RF interference cancellation signal having the first RF carrier frequency in the transmit band; a first receive coupler, communicatively coupled to an RF receive signal of the communication system having a second RF carrier frequency in a receive band, that combines, in order to remove a first portion of interference in the transmit band, the first RF interference cancellation signal and the RF receive signal to generate a composite RF receive signal;
wherein the composite RF receive signal is ultimately downconverted by the communication system to a composite digital receive signal;a sampling digital canceller, communicatively coupled to the digital transmit signal of the communication system, that samples and then transforms the digital transmit signal to create a second digital interference cancellation signal;
wherein the sampling digital canceller transforms the digital transmit signal according to a second configuration state;a second DAC that converts the second digital interference cancellation signal to a second BB interference cancellation signal; a second frequency upconverter that converts the second BB interference cancellation signal to a second RF interference cancellation signal having the first RF carrier frequency in the transmit band; a cleaning coupler that combines, in order to remove interference in the transmit band, the RF transmit signal and the second RF interference cancellation signal to generate a cleaned RF transmit signal; a first frequency downconverter that converts the cleaned RF transmit signal to a cleaned BB transmit signal; a first analog-to-digital-converter (ADC) that converts the cleaned BB transmit signal to a cleaned digital transmit signal; a receive-band digital canceller that converts the cleaned digital transmit signal to a third digital interference cancellation signal;
wherein the receive-band digital canceller transforms the cleaned digital transmit signal according to a third configuration state;
wherein the third digital interference cancellation signal is combined with the composite digital receive signal in order to remove a second portion of interference in the receive band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for out-of-band interference mitigation comprising:
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a transmit digital canceller, communicatively coupled to a digital transmit signal of a communication system, that samples and then transforms the digital transmit signal to create a first digital interference cancellation signal;
wherein the transmit digital canceller transforms the digital transmit signal according to a first configuration state;
wherein the digital transmit signal is ultimately upconverted by the communication system to a radio frequency (RF) transmit signal having a first RF carrier frequency in a transmit band;a first digital-to-analog-converter (DAC) that converts the first digital interference cancellation signal to a first baseband (BB) interference cancellation signal; a first frequency upconverter that converts the first BB interference cancellation signal to a first RF interference cancellation signal having the first RF carrier frequency in the transmit band; a first receive coupler, communicatively coupled to an RF receive signal of the communication system having a second RF carrier frequency in a receive band, that combines, in order to remove a first portion of interference in the transmit band, the first RF interference cancellation signal and the RF receive signal to generate a composite RF receive signal;
wherein the composite RF receive signal is ultimately downconverted by the communication system to a composite digital receive signal;a sampling digital canceller, communicatively coupled to the digital transmit signal of the communication system, that samples and then transforms the digital transmit signal to create a second digital interference cancellation signal;
wherein the sampling digital canceller transforms the digital transmit signal according to a second configuration state;a cleaning coupler that combines, in order to remove interference in the transmit band, the digital transmit signal and the second digital interference cancellation signal to generate a cleaned digital transmit signal; a receive-band digital canceller that converts the cleaned digital transmit signal to a third digital interference cancellation signal;
wherein the receive-band digital canceller transforms the cleaned digital transmit signal according to a third configuration state;
wherein the third digital interference cancellation signal is combined with the composite digital receive signal in order to remove a second portion of interference in the receive band. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification