INTERFERENCE CANCELLATION FOR DIVISION FREE DUPLEXING OR FULL DUPLEX OPERATION
First Claim
Patent Images
1. A device comprising:
- a transmit chain operable for receiving an input comprising a digital form of a first signal and for converting the digital form of the first signal into an analog form of the first signal;
a receive chain; and
a cancellation block coupled to the receive chain and the transmit chain, wherein the transmit chain is further operable for transmitting the analog form of the first signal while a second signal is being received by the receive chain in a frequency band that overlaps a frequency band used for transmitting the first signal, wherein the cancellation block is operable for generating a third signal that accounts for interference between the first signal transmitted by the transmit chain and the second signal received by the receive chain, and wherein the receive chain is operable for applying the third signal to the second signal received by the receive chain to produce a compensated second signal.
2 Assignments
0 Petitions
Accused Products
Abstract
In full duplex operation, a first signal is transmitted from a wireless device while a second signal in the same frequency band as the first signal is received at the device. A third signal can be generated that accounts for channel characteristics on the transmitted first signal. The third signal can be applied to the received second signal to compensate for interference caused by the transmitted first signal.
25 Citations
20 Claims
-
1. A device comprising:
-
a transmit chain operable for receiving an input comprising a digital form of a first signal and for converting the digital form of the first signal into an analog form of the first signal; a receive chain; and a cancellation block coupled to the receive chain and the transmit chain, wherein the transmit chain is further operable for transmitting the analog form of the first signal while a second signal is being received by the receive chain in a frequency band that overlaps a frequency band used for transmitting the first signal, wherein the cancellation block is operable for generating a third signal that accounts for interference between the first signal transmitted by the transmit chain and the second signal received by the receive chain, and wherein the receive chain is operable for applying the third signal to the second signal received by the receive chain to produce a compensated second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for wireless communication, the method comprising:
-
transmitting an analog form of a first signal from a wireless device, the analog form converted from a first digital form of the first signal; generating a cancellation signal that accounts for channel characteristics on the transmitted first signal, the cancellation signal generated in digital form using inputs comprising;
a second digital form of the first signal produced by converting the analog form of the first signal back to digital form, and a digital form of a second signal received at the wireless device, wherein the first signal is transmitted and the second signal is received concurrently within overlapping frequency bands;converting the cancellation signal from digital form to analog form; and applying the analog form of the cancellation signal to an analog form of the second signal received at the wireless device, to compensate for interference between the first signal transmitted by the wireless device and the second signal received by the wireless device. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A device comprising:
-
a plurality of transmit chains comprising a first transmit chain coupled to a first antenna and configured to convert a digital form of a first signal into an analog form of the first signal, the plurality of transmit chains further comprising a second transmit chain coupled to a second antenna and configured to convert a digital form of a second signal into an analog form of the second signal; a receive chain coupled to a third antenna; and a cancellation block coupled to the receive chain and the transmit chains, wherein the first transmit chain is operable for transmitting the analog form of the first signal while the second transmit chain is transmitting the analog form of the second signal and while a third signal is being received by the receive chain, the first and second transmit chains configured to transmit in overlapping frequency bands that also overlap a frequency band of the third signal;
the cancellation block configured to generate a fourth signal that accounts for channel effects between the first and third antennas on the first signal transmitted by the first transmit chain and for channel effects between the second and third antennas on the second signal transmitted by the second transmit chain, the fourth signal then subtracted from the third signal received by the receive chain to produce a compensated third signal. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification