Interference cancellation system
AssigneeRockwell Collins, Inc.
InventorDana J. Jensen
Life of this patent
Estimating the term…
Abstract
Embodiments of the inventive concepts disclosed herein are directed to a system for cancelling interference. The system may include a first antenna and a second antenna spatially separated from the first antenna. The system may include a first time delay unit, coupled to the first antenna, and configured to apply a first time delay and first power gain on a first signal received by the first antenna. The system may include a control circuit, coupled to the first time delay unit, and configured to determine the first time delay and first power gain to cause a modified version of the first signal and a second signal, received by the second antenna, to be aligned in time and power levels.
Claims20
A system for cancelling interference, the system comprising:
- a first antenna;
- a second antenna spatially separated from the first antenna;
- a first time delay unit, coupled to the first antenna, and configured to apply a first time delay and first power gain on a first signal received by the first antenna;
- a control circuit, coupled to the first time delay unit, and configured to determine the first time delay and first power gain to cause a modified version of the first signal and a second signal, received by the second antenna, to be aligned in time and power levels;
- and
- a subtractor configured to subtract respective power levels of the modified version of the first signal and the second signal to provide an output signal that provides at least a first null and a second null.
A system for automatically cancelling interference, the system comprising:
- a first antenna;
- a second antenna spatially separated from the first antenna;
- a first time delay unit configured to apply a first time delay and first power gain on a first signal received by the first antenna to provide a first modified version of the first signal;
- a second time delay unit configured to apply a second time delay and second power gain on a second signal received by the second antenna to provide a first modified version of the second signal;
- a third time delay unit configured to apply a third time delay and third power gain on the first signal received by the first antenna to provide a second modified version of the first signal;
- a fourth time delay unit configured to apply a fourth time delay and fourth power gain on the second signal received by the second antenna to provide a second modified version of the second signal;
- a first subtractor configured to subtract respective power levels of the first modified version of the first signal and the first modified version of the second signal to provide a first output signal;
- a first control circuit configured to determine the first and second time delays and first and second power gains based on a power level of the first output signal to cause the first modified version of the first signal and the first modified version of the second signal to be aligned in time and power levels;
- a second subtractor configured to subtract respective power levels of the second modified version of the first signal and the second modified version of the second signal to provide a second output signal;
- and
- a second control circuit configured to determine the third and fourth time delays and third and fourth power gains based on a power level of the second output signal to cause the second modified version of the first signal and the second modified version of the second signal to be aligned in time and power levels.
A radio frequency system for cancelling interference, the radio frequency system comprising:
- a first antenna;
- a second antenna spatially separated from the first antenna;
- a first time delay unit, coupled to the first antenna, and configured to apply a first time delay and first power gain on a first signal received by the first antenna;
- a second time delay unit, coupled to the second antenna, and configured to apply a second time delay and a second power gain on a second signal received by the second antenna;
- a circuit, coupled to the first time delay unit and the second time delay circuit, and configured to determine the first time delay, the second time delay, first power gain, and the second power gain to cause a modified version of the first signal and the second signal to be aligned in time and power levels;
- and
- a subtractor configured to subtract respective power levels of the modified version of the first signal and the second signal to provide an output signal that provides at least a first null and a second null.
Dependencies are inferred from the claim text.