MIMO antenna leakage canceller system
AssigneeMaxim Integrated Products, Inc.
InventorOlivier Charlon
Life of this patent
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Abstract
A system includes a first duplexer that receives samples of a signal transmitted from a first transmit portion of a communication device and outputs a filtered signal based on sampled transmitted signal. A first modulator adjusts the filtered signal based on at least one of a phase, amplitude, and delay of leakage associated with the transmitted signal. The leakage corresponds to leakage from the first transmit portion of the communication device to a first receive portion of the communication device. The first modulator provides a leakage cancellation signal based on the adjusted filtered signal. A first coupler subtracts the leakage cancellation signal from a signal received by the first receive portion of the communication device.
Claims20
A system comprising:
- a first duplexer that receives samples of a signal transmitted, via a second duplexer, from a first transmit portion of a communication device and outputs a filtered signal based on the sampled transmitted signal;
- a first modulator that receives the filtered signal from the first duplexer, that adjusts the filtered signal based on at least one of a phase, amplitude, and delay of leakage associated with the transmitted signal, wherein the leakage corresponds to leakage from the first transmit portion of the communication device to a first receive portion of the communication device, and that provides a leakage cancellation signal based on the adjusted filtered signal;
- and
- a first coupler that subtracts the leakage cancellation signal from a signal received by the first receive portion of the communication device.
A method comprising:
- sampling a signal transmitted from a first transmit portion of a communication device;
- filtering the sampled transmitted signal, wherein filtering the sampled transmitted signal includes using a first duplexer to filter the sampled transmitted signal, and wherein the signal is transmitted from the first transmit portion using a second duplexer;
- receiving the filtered signal from the first duplexer and adjusting the filtered signal based on at least one of a phase, amplitude, and delay of leakage associated with the transmitted signal, wherein the leakage corresponds to leakage from the first transmit portion of the communication device to a first receive portion of the communication device;
- providing a leakage cancellation signal based on the adjusted filtered signal;
- and
- subtracting the leakage cancellation signal from a signal received by the first receive portion of the communication device.
Dependencies are inferred from the claim text.