Multi-channel self-interference cancellation method and apparatus for relayed communication
First Claim
1. A method for providing self-interference cancellation in relayed electromagnetic communication between a first device and one or more other devices through a relay station comprising the steps of:
- generating at said first device a plurality of near signals;
transmitting said near signals from said first device to said relay station;
receiving at said first device a composite signal from said relay station, said composite signal containing relayed versions of said near signals and relayed versions of a plurality of remote signals transmitted from said one or more other devices, said composite signal having multiple frequency channels including one or more shared frequency channels, each said shared frequency channel being occupied by at least one of said relayed near signals and one of said relayed remote signals;
selectively generating one or more cancellation signals, each said cancellation signal having a frequency band corresponding to one of said shared frequency channels, each said cancellation signal representing a phase-inverted version of the relayed near signal occupying said one of said shared frequency channels; and
combining said cancellation signals with said composite signal to produce a desired signal representing said relayed remote signals.
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Abstract
Multi-channel self-interference cancellation is provided in relayed electromagnetic communication between a first device and one or more other devices on one or more shared frequency channels. Specifically, near signals are generated at the first device and transmitted to a relay station. A composite signal is received at the first device from the relay station containing relayed versions of the near signals and relayed versions of remote signals transmitted from the one or more other devices, the composite signal having frequency channels including the one or more shared frequency channels, each shared frequency channel occupied by at least one of the relayed near signals and one of the relayed remote signals. One or more cancellation signals are selectively generated, each having a frequency band corresponding to one of the shared frequency channels. The cancellation signals are combined with the composite signal to produce a desired signal representing the relayed remote signals.
54 Citations
10 Claims
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1. A method for providing self-interference cancellation in relayed electromagnetic communication between a first device and one or more other devices through a relay station comprising the steps of:
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generating at said first device a plurality of near signals;
transmitting said near signals from said first device to said relay station;
receiving at said first device a composite signal from said relay station, said composite signal containing relayed versions of said near signals and relayed versions of a plurality of remote signals transmitted from said one or more other devices, said composite signal having multiple frequency channels including one or more shared frequency channels, each said shared frequency channel being occupied by at least one of said relayed near signals and one of said relayed remote signals;
selectively generating one or more cancellation signals, each said cancellation signal having a frequency band corresponding to one of said shared frequency channels, each said cancellation signal representing a phase-inverted version of the relayed near signal occupying said one of said shared frequency channels; and
combining said cancellation signals with said composite signal to produce a desired signal representing said relayed remote signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for providing self-interference cancellation in relayed electromagnetic communication between a first device and one or more other devices through a relay station, the system comprising:
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means for generating at said first device a plurality of near signals;
means for transmitting said near signals from said first device to said relay station;
means for receiving at said first device a composite signal from said relay station, said composite signal containing relayed versions of said near signals and relayed versions of a plurality of remote signals transmitted from said one or more other devices, said composite signal having multiple frequency channels including one or more shared frequency channels, each said shared frequency channel being occupied by at least one of said relayed near signals and one of said relayed remote signals;
means for selectively generating one or more cancellation signals, each said cancellation signal having a frequency band corresponding to one of said shared frequency channels, each said cancellation signal representing a phase-inverted version of the relayed near signal occupying said one of said shared frequency channels; and
means for combining said cancellation signals with said composite signal to produce a desired signal representing said relayed remote signals.
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Specification