Systems and methods for full-duplex signal shaping
First Claim
1. A system for processing signals, comprising:
- a transmitter that transmits an RF transmit signal;
a receiver that receives an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;
an interference cancellation component that samples the RF transmit signal and transforms the sampled RF transmit signal into a self-interference cancellation signal;
wherein the self-interference cancellation signal is combined with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; and
a filtering component that removes a second portion of interference from the processed signal by;
downconverting the processed RF signal to a processed baseband signal,sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal, andfiltering the processed digital signal to remove the second portion of interference;
wherein removal of the first portion of interference results in prevention of receiver saturation at the filtering component.
0 Assignments
0 Petitions
Accused Products
Abstract
A system for processing signals includes an interference cancellation component that samples an RF transmit signal, transforms the sampled RF transmit signal into a self-interference cancellation signal, and combines the sampled RF transmit signal and self-interference cancellation signal to remove a first portion of interference from the RF receive signal, the combination forming a processed RF signal; and a filtering component that removes a second portion of interference from the processed signal by downconverting the processed RF signal to a processed baseband signal, sampling the processed baseband signal to create a processed digital signal, and filtering the processed digital signal to remove the second portion of interference.
145 Citations
27 Claims
-
1. A system for processing signals, comprising:
-
a transmitter that transmits an RF transmit signal; a receiver that receives an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;an interference cancellation component that samples the RF transmit signal and transforms the sampled RF transmit signal into a self-interference cancellation signal;
wherein the self-interference cancellation signal is combined with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; anda filtering component that removes a second portion of interference from the processed signal by; downconverting the processed RF signal to a processed baseband signal, sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal, and filtering the processed digital signal to remove the second portion of interference; wherein removal of the first portion of interference results in prevention of receiver saturation at the filtering component. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for processing signals, comprising:
-
transmitting an RF transmit signal; receiving an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;sampling the RF transmit signal; transforming the sampled RF transmit signal into a self-interference cancellation signal; combining the self-interference cancellation signal with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; downconverting the processed RF signal to a processed baseband signal; sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal; and filtering the processed digital signal to remove a second portion of interference; further comprising resampling the processed digital signal from the first sample rate to a second sample rate;
wherein the second sample rate is higher than the first sample rate.- View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A system for processing signals, comprising:
-
a transmitter that transmits an RF transmit signal; a receiver that receives an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;an interference cancellation component that samples the RF transmit signal and transforms the sampled RF transmit signal into a self-interference cancellation signal;
wherein the self-interference cancellation signal is combined with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; anda filtering component that removes a second portion of interference from the processed signal by; downconverting the processed RF signal to a processed baseband signal, sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal, and filtering the processed digital signal to remove the second portion of interference; wherein downconverting the processed RF signal comprises downconverting the processed RF signal into a narrowband stream.
-
-
16. A system for processing signals, comprising:
-
a transmitter that transmits an RF transmit signal; a receiver that receives an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;an interference cancellation component that samples the RF transmit signal and transforms the sampled RF transmit signal into a self-interference cancellation signal;
wherein the self-interference cancellation signal is combined with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; anda filtering component that removes a second portion of interference from the processed signal by; downconverting the processed RF signal to a processed baseband signal, sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal, and filtering the processed digital signal to remove the second portion of interference; wherein the filtering component resamples the processed digital signal from the first sample rate to a second sample rate;
wherein the second sample rate is higher than the first sample rate.- View Dependent Claims (17, 18)
-
-
19. A system for processing signals, comprising:
-
a transmitter that transmits an RF transmit signal; a receiver that receives an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;an interference cancellation component that samples the RF transmit signal and transforms the sampled RF transmit signal into a self-interference cancellation signal;
wherein the self-interference cancellation signal is combined with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; anda filtering component that removes a second portion of interference from the processed signal by; downconverting the processed RF signal to a processed baseband signal, sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal, and filtering the processed digital signal to remove the second portion of interference; wherein the filtering component resamples the processed digital signal from the first sample rate to a second sample rate;
wherein the second sample rate is lower than the first sample rate.- View Dependent Claims (20, 21)
-
-
22. A system for processing signals, comprising:
-
a transmitter that transmits an RF transmit signal; a receiver that receives an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;an interference cancellation component that samples the RF transmit signal and transforms the sampled RF transmit signal into a self-interference cancellation signal;
wherein the self-interference cancellation signal is combined with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; anda filtering component that removes a second portion of interference from the processed signal by; downconverting the processed RF signal to a processed baseband signal, sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal, and filtering the processed digital signal to remove the second portion of interference; wherein the filtering component performs mapping of a digital transmit signal, using a digital intermediate frequency converter, to a frequency fragment in a wireless frequency band for transmission by the transmitter;
wherein the transmitter converts the mapped digital transmit signal into the RF transmit signal.
-
-
23. A method for processing signals, comprising:
-
transmitting an RF transmit signal; receiving an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;sampling the RF transmit signal; transforming the sampled RF transmit signal into a self-interference cancellation signal; combining the self-interference cancellation signal with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; downconverting the processed RF signal to a processed baseband signal; sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal; and filtering the processed digital signal to remove a second portion of interference; wherein downconverting the processed RF signal comprises downconverting the processed RF signal into a narrowband stream.
-
-
24. A method for processing signals, comprising:
-
transmitting an RF transmit signal; receiving an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;sampling the RF transmit signal; transforming the sampled RF transmit signal into a self-interference cancellation signal; combining the self-interference cancellation signal with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; downconverting the processed RF signal to a processed baseband signal; sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal; and filtering the processed digital signal to remove a second portion of interference; wherein removal of the first portion of interference results in prevention of receiver saturation; wherein the first portion of interference is larger than a dynamic range of the analog-to-digital converter.
-
-
25. A method for processing signals, comprising:
-
transmitting an RF transmit signal; receiving an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;sampling the RF transmit signal; transforming the sampled RF transmit signal into a self-interference cancellation signal; combining the self-interference cancellation signal with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; downconverting the processed RF signal to a processed baseband signal; sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal; and filtering the processed digital signal to remove a second portion of interference; wherein the processed digital signal comprises a first digital signal stream and a second digital signal stream;
further comprising resampling the first digital signal stream from the first sample rate to a second sample rate;
wherein filtering the processed digital signal comprises filtering the first digital signal stream after resampling and filtering the second digital signal stream without resampling.- View Dependent Claims (26)
-
-
27. A method for processing signals, comprising:
-
transmitting an RF transmit signal; receiving an RF receive signal;
wherein transmission of the RF transmit signal and reception of the RF receive signal occur simultaneously;sampling the RF transmit signal; transforming the sampled RF transmit signal into a self-interference cancellation signal; combining the self-interference cancellation signal with the RF receive signal to remove a first portion of interference from the RF receive signal, said combination forming a processed RF signal; downconverting the processed RF signal to a processed baseband signal; sampling, at a first sample rate, the processed baseband signal at an analog-to-digital converter to create a processed digital signal; and filtering the processed digital signal to remove a second portion of interference; further comprising performing mapping of a digital transmit signal, using a digital intermediate frequency converter, to a frequency fragment in a wireless frequency band for transmission;
further comprising converting the mapped digital transmit signal into the RF transmit signal.
-
Specification