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US 7,443,173 B2Granted
Systems and techniques for radio frequency noise cancellation
AssigneeIntel Corporation
InventorGregory L. Ebert
Life of this patent
Estimating the term…
Abstract
Various embodiments for radio frequency (RF) noise cancellation are described. In one embodiment, an apparatus may comprise an RF noise cancellation system arranged to sense platform noise observed by a radio subsystem, create an inverse version of the sensed platform noise, and add the inverse version of the sensed platform noise to a received RF signal to remove the platform noise from the received RF signal. Other embodiments are described and claimed.
Claims17
An apparatus comprising:
- a radio frequency (RF) noise cancellation system to create an inverse version of platform noise sensed by a radio subsystem and to add the inverse version of the sensed platform noise to a received RF signal to remove platform noise from the received RF signal, the RF noise cancellation system comprising a weighting/summing module to recreate the platform noise sensed by the radio subsystem and to generate a noise mitigating signal inverse to the recreated platform noise, the recreated platform noise having arbitrary amplitude and phase, the weighting/summing module to variably weight and sum phase shifted noise signals corresponding to the platform noise sensed by the radio subsystem to determine the arbitrary amplitude and phase and a noise sensing module to sense platform noise observed by the radio subsystem and to generate phase shifted noise signals corresponding to platform noise sensed by the noise sensing module, the noise sensing module comprising an antenna array having a plurality of antenna segments separated by a predetermined phase shift.
A system comprising:
- a wireless device comprising an RF noise cancellation system to create an inverse version of platform noise sensed by a radio subsystem and to add the inverse version of the sensed platform noise to a received RF signal to remove platform noise from the received RF signal;
- a communications antenna coupled to the wireless device to receive the RF signal;
- and
- a noise sensing module to sense platform noise observed by the radio subsystem and to generate phase shifted noise signals corresponding to platform noise sensed by the noise sensing module, the noise sensing module comprising an antenna array having a plurality of antenna segments separated by a predetermined phase shift,
- the RF noise cancellation system comprising a weighting/summing module to recreate the platform noise sensed by the radio subsystem and to generate a noise mitigating signal inverse to the recreated platform noise, the recreated platform noise having arbitrary amplitude and phase, the weighting/summing module to variably weight and sum phase shifted noise signals corresponding to the platform noise sensed by the radio subsystem to determine the arbitrary amplitude and phase.
2 more elements
A method comprising:
- sensing platform noise;
- creating an inverse version of the sensed platform noise;
- adding the inverse version of the sensed platform noise to a received RF signal to cancel the platform noise from the received RF signal;
- weighting and summing phase shifted signals corresponding to the sensed platform noise to recreate the sensed platform noise having an arbitrary phase shift and amplitude;
- and
- sensing the platform noise using a phased noise sensing antenna array having a plurality of antenna segments separated by a predetermined phase shift.
3 more elements
An article comprising a machine-readable storage medium containing instructions that if executed enable a system to:
- sense platform noise using a phased noise sensing antenna array having a plurality of antenna segments separated by a predetermined phase shift;
- create an inverse version of the sensed platform noise;
- add the inverse version of the sensed platform noise to a received RF signal to cancel the platform noise from the received RF signal;
- and
- weight and sum phase shifted signals corresponding to the sensed platform noise to recreate the sensed platform noise having an arbitrary phase shift and amplitude.
2 more elements
Dependencies are inferred from the claim text.