Wireless Interference Mitigation via Dynamic Frequency Band Adjustment
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Solution Overview
Problem
Mobile wireless communication devices face interference challenges due to the close proximity of multiple transceivers operating on different communication protocols, which limits the achievable isolation between transmitters and receivers, affecting the performance of radio frequency reception.
Innovation Solution
A method is implemented to estimate the interference impact between transceivers and adjust the frequency band usage of wireless local area network connections based on the performance impact, using a control processor to periodically reassess and change the frequency band to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple wireless transceivers are placed in close proximity in a compact mobile device, then device size and integration are improved, but interference between transceivers increases
Solution Approach 1:
The system dynamically changes operating parameters including frequency band selection and transmit power levels to mitigate interference. The receiver estimates interference from the transmitter and adjusts the frequency band usage accordingly, allowing the device to maintain compact size while managing interference through parameter optimization.
Solution Approach 2:
The interference mitigation system operates dynamically by continuously monitoring and adjusting frequency band allocation between transceivers. The receiver periodically estimates interference levels and triggers frequency band changes when necessary, creating a dynamic adaptation mechanism that responds to changing interference conditions in real-time.
2Speed
If transmitter power is increased to improve communication range, then transmission distance is improved, but interference to co-located receiver increases
Solution Approach 1:
The system adjusts transmit power levels as a controllable parameter to balance communication range with interference mitigation. When interference is detected, the transmitter reduces power or changes frequency band, allowing the system to maintain adequate range while preventing receiver saturation.
Solution Approach 2:
The receiver provides feedback to the transmitter about estimated interference levels. This feedback loop enables the transmitter to adjust its power output and frequency selection based on actual interference conditions, optimizing the balance between communication range and receiver protection.
3Object-affected harmful factors
If frequency bands are dynamically adjusted to mitigate interference, then interference mitigation is improved, but system complexity increases
Solution Approach 1:
The system implements self-service interference mitigation where the receiver autonomously estimates interference levels and triggers frequency band changes without requiring complex external coordination. This self-managing approach reduces overall system complexity while maintaining effective interference mitigation.
Solution Approach 2:
The receiver performs preliminary interference estimation before transmission occurs or during ongoing operation, allowing proactive frequency band selection. This preliminary action enables the system to prevent interference issues before they degrade performance, simplifying the control logic compared to reactive approaches.
Data Source
AI summary
Mitigating interference in a mobile wireless communication device by using an estimation of the performance impact of interfering signals generated by a wireless cellular transmitter and received by a co-located wireless local area network receiver. Wireless local area network frequency band usage is modified based on the performance impact estimation and the state of the wireless cellular and wireless local area network connections. The estimation accounts for properties of the wireless cellular transmitter and wireless local area network receiver as well as operational characteristics of the wireless cellular and wireless local area network connections.