Wireless Access Point Interference Management for GPS Harmonics
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Solution Overview
Problem
Wireless communication systems often interfere with disparate communication technologies, such as GPS, due to frequency assignments that cause interference through harmonic order products or spectral regrowth, leading to disruptions in simultaneous transmissions.
Innovation Solution
A method and apparatus that allow wireless devices to communicate with access points to adjust transmit power and resource allocations to avoid interfering frequencies, using parameters to signal the access point about interfering technologies, thereby mitigating interference by reducing power during interference periods or allocating non-interfering resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If access points assign frequencies in the higher 700 MHz range for wireless communication, then communication bandwidth and data transmission are improved, but interference is caused to GPS signals through second harmonic order products
Solution Approach 1:
The patent changes the frequency parameter by avoiding assignment of frequencies in the higher 700 MHz range that would generate harmful second harmonic order products interfering with GPS signals. The access point modifies its frequency allocation parameters to exclude ranges that could cause interference while maintaining adequate communication bandwidth through alternative frequency assignments.
2Adaptability or versatility
If access points assign frequencies for uplink transmission, then wireless communication capability is improved, but direct interference or harmonic order product interference is caused to other communication technologies
Solution Approach 1:
The access point modifies frequency assignment parameters to avoid generating harmful emissions that would interfere with other communication technologies. By adjusting the assigned frequencies and their associated transmission parameters, the system maintains wireless communication versatility while preventing direct and harmonic order product interference with disparate technologies.
Solution Approach 2:
The system implements feedback mechanisms where the access point receives information about interfering technologies and their operating parameters, then adjusts its frequency assignments accordingly. This feedback loop enables the access point to adapt its resource allocation to avoid causing interference while maintaining communication capability.
3Productivity
If devices transmit simultaneously on assigned frequencies, then communication efficiency is improved, but spectral regrowth causes interference to GPS and other systems
Solution Approach 1:
The patent addresses spectral regrowth by modifying transmission parameters including frequency selection and power control. The access point assigns frequencies and adjusts transmit power levels to minimize spectral regrowth that would interfere with GPS and other systems, thereby maintaining communication efficiency while reducing harmful emissions.
Data Source
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AI summary
Systems and methodologies are described that facilitate avoiding interference with communication technologies. A communications apparatus comprises an interference detecting component for determining potential or actual interference with one or more communication technologies over a set of resources, and a parameter signaling component for transmitting one or more parameters related to the interference to an access point that assigns resources to the communications apparatus. An access point comprises a parameter signal receiving component for receiving, from the communications apparatus, one or more parameters related to potential or actual interference with one or more communications technologies, an interfered resource determining component for determining resources over which communications potentially or actually interfere with the one or more communication technologies, and a resource assigning component for assigning resources to the communications apparatus. A method performed by the communications apparatus comprises determining potential or actual interference with one or more communication technologies over a set of resources, and transmitting one or more parameters related to the interference to an access point that assigns resources to the communications apparatus. A method performed by the access point comprises receiving one or more parameters from a communications apparatus, wherein the one or more parameters are related to potential or actual interference with one or more communication technologies, determining resources over which communications potentially or actually interfere with the one or more communication technologies, and assigning resources to the communications apparatus.