SYSTEMS FOR DELAY-MATCHED ANALOG SELF-INTERFERENCE CANCELLATION
First Claim
Patent Images
1. A system for delay-matched analog self-interference cancellation comprising:
- a transmit coupler, communicatively coupled to an RF transmit signal of a full-duplex wireless communication system, that samples the RF transmit signal to create a sampled RF transmit signal;
a delay matcher, comprising concentric metal delay lines coupled by switches, that imposes a variable delay on the sampled RF transmit signal to create a delayed RF transmit signal;
wherein the variable delay is a function of delay line lengths and switch positions;
an analog self-interference canceller, comprising a signal divider, first and second delayers, first and second scalers, and a signal combiner, wherein the signal divider splits the delayed RF transmit signal into first and second transmit signal components, the first scaler and first delayer scale and delay the first transmit signal component to create a first self-interference cancellation signal component, the second scaler and second delayer scale and delay the second transmit signal component to create a second self-interference cancellation signal component, and the signal combiner combines the first and second self-interference cancellation signal components to form an RF self-interference cancellation signal;
an amplifier, that amplifies the RF self-interference cancellation signal; and
a receive coupler, communicatively coupled to an RF receive signal of the full-duplex wireless communication system, that combines the RF self-interference cancellation signal with the RF receive signal.
4 Assignments
0 Petitions
Accused Products
Abstract
A system for delay-matched analog self-interference cancellation including a transmit coupler, that samples the analog transmit signal to create a sampled analog transmit signal; a delay matcher that imposes a variable delay on the sampled analog transmit signal to create a delayed analog transmit signal; an analog self-interference canceller that transforms the delayed analog transmit signal to an analog self-interference cancellation signal; and a receive coupler, that combines the analog self-interference cancellation signal with the analog receive signal.
-
Citations
18 Claims
-
1. A system for delay-matched analog self-interference cancellation comprising:
-
a transmit coupler, communicatively coupled to an RF transmit signal of a full-duplex wireless communication system, that samples the RF transmit signal to create a sampled RF transmit signal; a delay matcher, comprising concentric metal delay lines coupled by switches, that imposes a variable delay on the sampled RF transmit signal to create a delayed RF transmit signal;
wherein the variable delay is a function of delay line lengths and switch positions;an analog self-interference canceller, comprising a signal divider, first and second delayers, first and second scalers, and a signal combiner, wherein the signal divider splits the delayed RF transmit signal into first and second transmit signal components, the first scaler and first delayer scale and delay the first transmit signal component to create a first self-interference cancellation signal component, the second scaler and second delayer scale and delay the second transmit signal component to create a second self-interference cancellation signal component, and the signal combiner combines the first and second self-interference cancellation signal components to form an RF self-interference cancellation signal; an amplifier, that amplifies the RF self-interference cancellation signal; and a receive coupler, communicatively coupled to an RF receive signal of the full-duplex wireless communication system, that combines the RF self-interference cancellation signal with the RF receive signal. - View Dependent Claims (2, 3)
-
-
4. A system for delay-matched 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; a delay matcher, that imposes a variable delay on the sampled analog transmit signal to create a delayed analog transmit signal; an analog self-interference canceller that transforms the delayed analog transmit signal to an analog self-interference cancellation signal; and a receive coupler, communicatively coupled to an analog receive signal of the communication system, that combines the analog self-interference cancellation signal with the analog receive signal. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification