SYSTEMS AND METHODS FOR OUT-OF-BAND INTERFERENCE MITIGATION
First Claim
1. A system for out-of-band interference mitigation comprising:
- a transmit coupler, communicatively coupled to a radio-frequency (RF) transmit signal of a communication system, that samples the RF transmit signal to create a sampled RF transmit signal;
wherein the RF transmit signal has a first RF carrier frequency in a transmit band;
a transmit analog canceller that transforms, according to a first configuration state, the sampled RF transmit signal to a first RF interference cancellation signal;
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;
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 cleaned transmit signal to a baseband (BB) transmit signal having a BB frequency, wherein the BB frequency is less than the first RF carrier frequency;
a second frequency downconverter that converts the composite RF receive signal to a composite BB receive signal;
an analog-to-digital converter that converts the BB transmit signal to a digital transmit signal;
a digital canceller that transforms the digital transmit signal to a digital interference cancellation signal;
a digital-to-analog converter that converts the digital interference cancellation signal to a digitally-sourced interference cancellation signal; and
a second receive coupler that combines, in order to remove a second portion of interference in the receive band, the digitally-sourced interference cancellation signal and the composite BB receive signal.
4 Assignments
0 Petitions
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.
4 Citations
22 Claims
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1. A system for out-of-band interference mitigation comprising:
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a transmit coupler, communicatively coupled to a radio-frequency (RF) transmit signal of a communication system, that samples the RF transmit signal to create a sampled RF transmit signal;
wherein the RF transmit signal has a first RF carrier frequency in a transmit band;a transmit analog canceller that transforms, according to a first configuration state, the sampled RF transmit signal to a first RF interference cancellation signal; 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; 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 cleaned transmit signal to a baseband (BB) transmit signal having a BB frequency, wherein the BB frequency is less than the first RF carrier frequency; a second frequency downconverter that converts the composite RF receive signal to a composite BB receive signal; an analog-to-digital converter that converts the BB transmit signal to a digital transmit signal; a digital canceller that transforms the digital transmit signal to a digital interference cancellation signal; a digital-to-analog converter that converts the digital interference cancellation signal to a digitally-sourced interference cancellation signal; and a second receive coupler that combines, in order to remove a second portion of interference in the receive band, the digitally-sourced interference cancellation signal and the composite BB receive signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for out-of-band interference mitigation comprising:
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a transmit coupler, communicatively coupled to a transmit signal of a communication system, that samples the transmit signal to create a sampled transmit signal;
wherein the transmit signal has a first center frequency in a transmit band and a signal power in the transmit band;a first canceller that transforms the sampled transmit signal to a first interference cancellation signal; a first receive coupler, communicatively coupled to a receive signal of the communication system having a second center frequency in a receive band, that combines, in order to remove a first portion of interference in the transmit band, the first interference cancellation signal and the receive signal to produce a first composite receive signal; a sampling interference filtering system that, in order to remove interference in the transmit band, filters the sampled transmit signal to generate a cleaned transmit signal;
wherein the cleaned transmit signal has a reduced signal power in the transmit band;a second canceller that generates a second interference cancellation signal based on the cleaned transmit signal; and a second receive coupler, communicatively coupled to the receive path, that combines, in order to remove a second portion of interference in the receive band, the second interference cancellation signal and the first composite receive signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification