Repeater Emissions Control for In-Band and Out-of-Band Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless repeaters face challenges in controlling RF electromagnetic field emissions that can interfere with other wireless systems, despite adherence to generic standards like 802.11 IEEE, necessitating additional protection to prevent interference.
Innovation Solution
A system and method are introduced to control the total output power level and emissions within and outside the passband of repeater transmissions using an emissions control system, incorporating input measurements and algorithms to minimize interference with other communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If generic emissions standards (e.g., 802.11 IEEE) are used to control repeater transmissions, then device complexity is reduced and ease of manufacture is improved, but emissions interference with other wireless systems occurs
Solution Approach 1:
The emissions control system performs preliminary measurements of the RF electromagnetic field environment before the repeater begins transmissions. The system identifies frequency bands and wireless systems present in the area, and pre-configures emission limits and control parameters to prevent interference before it occurs
Solution Approach 2:
The emissions control system continuously monitors the RF electromagnetic field environment and measures actual emissions from the repeater. Based on this feedback, the system dynamically adjusts transmission power levels and emission characteristics to maintain compliance and prevent interference with other wireless systems
2Object-generated harmful factors
If additional emissions control mechanisms are added to the repeater, then emissions interference is reduced, but device complexity increases
Solution Approach 1:
The emissions control system is designed to perform multiple functions: measuring RF electromagnetic field levels, identifying frequency bands in use, controlling in-band emissions, controlling out-of-band emissions, and dynamically adjusting transmission parameters. This multi-functional approach consolidates what could be separate complex subsystems into a single integrated control mechanism
Solution Approach 2:
The emissions control system autonomously monitors the environment, measures its own emissions, and adjusts its operation without requiring external intervention. The system self-regulates by comparing measured emissions against identified interference thresholds and automatically modifying transmission parameters to prevent interference
Data Source
AI summary
A system and method for minimizing interference between communication systems in an area. A system includes a repeater that is positioned within the area. The repeater includes a donor antenna communicating between the repeater and a wireless base station, a server antenna communicating between the repeater and a user device, a downlink transmission path to boost and repeat signals received by the donor antenna to the server antenna, and an uplink transmission path to boost and repeat signals received by the server antenna to the donor antenna. The system includes an emissions control system having control inputs that are processed to control a total output power level in a passband of the signal transmissions on the uplink transmission path by the repeater, and/or emissions outside the passband of the signal transmissions on the uplink transmission path by the repeater, based on the one or more processed control inputs.