INTERFERENCE CANCELLATION APPARATUS AND METHOD
First Claim
1. An interference cancellation apparatus, comprising:
- a main receive antenna (110), configured to receive a radio frequency receive signal, and transmit the radio frequency receive signal to a first-type interference canceller (130);
a divider (120), configured to acquire a radio frequency reference signal generated according to a transmit signal, and transmit the radio frequency reference signal to the first-type interference canceller (130) and a second-type interference reconstructor (150);
the first-type interference canceller (130), configured to receive the radio frequency reference signal transmitted by the divider (120) and the radio frequency receive signal transmitted by the main receive antenna (110), and cancel a first-type self-interference component in the radio frequency receive signal according to the radio frequency reference signal to acquire a first processed signal, wherein the first-type self-interference component comprises a main-path self-interference component;
the second-type interference reconstructor (150), configured to acquire a reconstructed self-interference signal according to a self-interference channel parameter and the radio frequency reference signal transmitted by the divider (120);
a coupler (140), configured to receive the first processed signal and the reconstructed self-interference signal transmitted by the second-type interference reconstructor (150), and cancel a second-type self-interference component in the first processed signal according to the reconstructed self-interference signal to generate a second processed signal;
a down converter (160), configured to perform down-conversion processing on the second processed signal to generate a third processed signal; and
an analog to digital converter ADC (170), configured to perform analog to digital conversion on the third processed signal to generate a digital signal;
whereinthe second-type interference reconstructor (150) is further configured to acquire a digital baseband reference signal, receive the digital signal generated by the analog to digital converter ADC (170) and the radio frequency reference signal transmitted by the divider (120), and perform self-interference channel estimation according to the digital baseband reference signal and the digital signal to acquire the self-interference channel parameter.
1 Assignment
0 Petitions
Accused Products
Abstract
Embodiments of the present invention provide an interference cancellation apparatus and method. The method includes: receiving a radio frequency receive signal by using a main receive antenna; canceling a first-type self-interference component in the radio frequency receive signal according to a radio frequency reference signal, to generate a first processed signal; acquiring the reconstructed self-interference signal according to a self-interference channel parameter and the radio frequency reference signal; canceling a second-type self-interference component in the first processed signal according to the reconstructed self-interference signal to generate a second processed signal; performing down-conversion processing on the second processed signal to generate a third processed signal; performing analog to digital conversion on the third processed signal to generate a digital signal; and acquiring a digital baseband reference signal, and performing self-interference channel estimation according to the digital baseband reference signal and the digital signal to acquire the self-interference channel parameter.
57 Citations
18 Claims
-
1. An interference cancellation apparatus, comprising:
-
a main receive antenna (110), configured to receive a radio frequency receive signal, and transmit the radio frequency receive signal to a first-type interference canceller (130); a divider (120), configured to acquire a radio frequency reference signal generated according to a transmit signal, and transmit the radio frequency reference signal to the first-type interference canceller (130) and a second-type interference reconstructor (150); the first-type interference canceller (130), configured to receive the radio frequency reference signal transmitted by the divider (120) and the radio frequency receive signal transmitted by the main receive antenna (110), and cancel a first-type self-interference component in the radio frequency receive signal according to the radio frequency reference signal to acquire a first processed signal, wherein the first-type self-interference component comprises a main-path self-interference component; the second-type interference reconstructor (150), configured to acquire a reconstructed self-interference signal according to a self-interference channel parameter and the radio frequency reference signal transmitted by the divider (120); a coupler (140), configured to receive the first processed signal and the reconstructed self-interference signal transmitted by the second-type interference reconstructor (150), and cancel a second-type self-interference component in the first processed signal according to the reconstructed self-interference signal to generate a second processed signal; a down converter (160), configured to perform down-conversion processing on the second processed signal to generate a third processed signal; and an analog to digital converter ADC (170), configured to perform analog to digital conversion on the third processed signal to generate a digital signal;
whereinthe second-type interference reconstructor (150) is further configured to acquire a digital baseband reference signal, receive the digital signal generated by the analog to digital converter ADC (170) and the radio frequency reference signal transmitted by the divider (120), and perform self-interference channel estimation according to the digital baseband reference signal and the digital signal to acquire the self-interference channel parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An interference cancellation method, comprising:
-
acquiring a radio frequency reference signal generated according to a transmit signal; receiving a radio frequency receive signal by using a main receive antenna; canceling a first-type self-interference component in the radio frequency receive signal according to the radio frequency reference signal, to generate a first processed signal, wherein the first-type self-interference component comprises a main-path self-interference component; acquiring the reconstructed self-interference signal according to a self-interference channel parameter and the radio frequency reference signal; canceling a second-type self-interference component in the first processed signal according to the reconstructed self-interference signal to generate a second processed signal; performing down-conversion processing on the second processed signal to generate a third processed signal; performing analog to digital conversion on the third processed signal to generate a digital signal; and acquiring a digital baseband reference signal, and performing self-interference channel estimation according to the digital baseband reference signal and the digital signal to acquire the self-interference channel parameter. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
Specification