ARCHITECTURE AND CONTROL OF ANALOG SELF-INTERFERENCE CANCELLATION
First Claim
1. An apparatus for interference cancellation in a wireless communication system with a diversity antenna configured for reception, comprising:
- a receive signal path configured to transfer an overall receive (Rx) signal comprising an Rx signal and a residual transmit (Tx) signal, from an antenna port to an Rx input port of a transceiver;
at least one cancellation path configured to receive a leakage Tx signal from the antenna port;
a cancellation unit configured to apply a cancellation signal, to the overall Rx signal in the receive signal path;
a compensation unit configured to generate the cancellation signal by modifying the leakage Tx signal in the cancellation path, based on a compensation control signal; and
a feedback receiver unit configured to generate the compensation control signal based on the residual Tx signal and the cancellation signal.
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Accused Products
Abstract
An apparatus for interference cancellation in wireless communication systems configured for reception, comprises a receive signal path configured to convey an overall receive (Rx) signal comprising an Rx signal and a residual transmit (Tx) signal, from an antenna port to an Rx input port of a transceiver, and at least one cancellation path configured to receive a leakage Tx signal from the antenna port. Further, the apparatus comprises a cancellation unit configured to apply a cancellation signal to the overall Rx signal in the receive signal path and a compensation unit configured to generate the cancellation signal by modifying the leakage Tx signal in the cancellation path, based on a compensation control signal. In addition, the apparatus comprises a feedback receiver unit configured to generate the compensation control signal based on the residual Tx signal in the overall Rx signal and the cancellation signal.
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Citations
27 Claims
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1. An apparatus for interference cancellation in a wireless communication system with a diversity antenna configured for reception, comprising:
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a receive signal path configured to transfer an overall receive (Rx) signal comprising an Rx signal and a residual transmit (Tx) signal, from an antenna port to an Rx input port of a transceiver; at least one cancellation path configured to receive a leakage Tx signal from the antenna port; a cancellation unit configured to apply a cancellation signal, to the overall Rx signal in the receive signal path; a compensation unit configured to generate the cancellation signal by modifying the leakage Tx signal in the cancellation path, based on a compensation control signal; and a feedback receiver unit configured to generate the compensation control signal based on the residual Tx signal and the cancellation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for interference cancellation in a wireless communication system with a main antenna, comprising:
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a receive signal path configured to transfer an overall receive (Rx) signal comprising an Rx signal and a residual interference signal from an antenna port to an Rx input port of a transceiver; a transmit signal path configured to transfer an overall Tx signal, from an output port of a power amplifier to the antenna port; a cancellation unit configured to apply a first cancellation signal, and a second cancellation signal to the overall Rx signal in the receive signal path; a first compensation unit configured to generate the first cancellation signal by modifying a first interference signal in the transmit signal path, based on a first compensation control signal; a second compensation unit configured to generate the second cancellation signal by modifying a second interference signal in the transmit signal path, based on a second compensation control signal; and a feedback receiver unit configured to generate the first compensation control signal based on the residual interference signal and the first cancellation signal, and configured to generate the second compensation control signal based on the residual interference signal and the second cancellation signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for a wireless communication system with a diversity antenna configured for reception, that has at least one receive signal path configured to convey an overall receive (Rx) signal comprising an Rx signal and a residual transmit (Tx) signal from a diversity antenna port to an Rx input port of a transceiver and one cancellation path configured to receive a leakage Tx signal from the diversity antenna port, comprising;
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sampling a compensated leakage Tx signal in the cancellation path at a first coupling unit and generating a first leakage Tx output signal and a second leakage Tx output signal based on the compensated leakage Tx signal; sampling the residual Tx signal in the overall Rx signal at a second coupling unit to generate a residual Tx output signal at a first output of the second coupling unit; receiving the first leakage Tx output signal from the first coupling unit at the second coupling unit and generating a cancellation of the residual Tx signal in the receive signal path at a second output of the second coupling unit; and providing the second leakage Tx output signal from the first coupling unit and the residual Tx output signal from the second coupling unit to a feedback receiver and generating a compensation control signal for compensating the leakage Tx signal in the cancellation path based thereon, to form the compensated leakage Tx signal. - View Dependent Claims (24)
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25. A method for a wireless communication system with a main antenna, that has at least one receive signal path configured to convey an overall receive (Rx) signal comprising an Rx signal and residual interference signal comprising a first residual interference signal and a second residual interference signal from a main antenna port to an Rx input port of a transceiver and at least one transmit signal path configured to convey an overall Tx signal, from an output port of a power amplifier to the main antenna port, comprising;
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sampling the overall Tx signal in the transmit signal path at a first coupling unit to provide a first interference signal and a second interference signal; sampling a compensated first interference signal associated with the first interference signal at a second coupling unit and generating a first coupled signal and a second coupled signal based thereon; sampling the residual interference signal in the overall Rx signal at a third coupling unit to provide a residual output interference signal based on the residual interference signal at a first output of the third coupling unit; receiving the first coupled signal from the second coupling unit at the third coupling unit and generating a cancellation of the first residual interference signal in the receive signal path at a second output of the third coupling unit; sampling a compensated second interference signal associated with the second interference signal at a fourth coupling unit and generating a third coupled signal and a fourth coupled signal based thereon; providing the third coupled signal to the second output of the third coupling unit and generating a cancellation of the second residual interference signal in the receive signal path at the second output of the third coupling unit; and providing the residual output interference signal from the third coupling unit, the second coupled signal from the second coupling unit and the fourth coupled signal from the fourth coupling unit to a feedback receiver unit and generating a first compensation control signal for compensating the first interference signal based on a comparison of the residual output interference signal and the second coupled signal to iteratively arrive at a final value of the compensated first interference signal, and generating a second compensation control signal for compensating the second interference signal based on a comparison of the residual output interference signal and the fourth coupled signal to iteratively arrive at a final value of the compensated second interference signal. - View Dependent Claims (26, 27)
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Specification