Mobile Device Control Module for Transmitter-Receiver Interference
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Solution Overview
Problem
Mobile devices with both transmitting and positioning capabilities face interference issues between their high power transmitters and sensitive satellite positioning system receivers, leading to decreased performance and increased power consumption due to existing solutions like complex filters, blanking, and increased power requirements.
Innovation Solution
A control module in the mobile device monitors the transmission power and selectively enables or disables the satellite signal receiver based on predetermined thresholds, reducing interference by intelligently managing the receiver's operation in relation to the transmitter's power levels, and optionally adjusting the transmitter's power or disabling it to allow signal acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the high power transmitter is used to transmit information, then the transmitting capability is improved, but the SPS receiver performance deteriorates due to interference
Solution Approach 1:
The patent segments the operation timeline by disabling the SPS receiver during high power transmitter transmission periods and enabling it during low power periods. This temporal segmentation allows both the high power transmitter and sensitive SPS receiver to operate without mutual interference, resolving the contradiction between transmitter power and receiver performance.
Solution Approach 2:
The system implements periodic action by cycling the SPS receiver between enabled and disabled states synchronized with the transmitter's power transmission cycle. The receiver is disabled during high power transmission periods and enabled during low power periods, creating a periodic operation pattern that eliminates interference while maintaining both functions.
2Reliability
If complex filters are used in the SPS receiver to limit interference, then the receiver performance is improved, but the device complexity and power consumption increase
Solution Approach 1:
The patent extracts the interference mitigation function from the receiver's internal circuitry (filters, amplifiers) and implements it at the system control level through the control module. Instead of adding complex filters to the receiver, the system simply disables the receiver during high power transmitter periods, eliminating the need for additional complex circuitry while maintaining receiver performance.
Solution Approach 2:
The system dynamically adjusts the receiver's operational state based on real-time transmitter power levels. The control module monitors transmitter power and dynamically enables or disables the SPS receiver accordingly, replacing static complex filtering circuitry with a dynamic control approach that achieves the same interference mitigation goal with much simpler implementation.
3Object-affected harmful factors
If the SPS receiver is blanked during high power transmitter operation, then the interference is reduced, but the receiver sensitivity decreases and power consumption increases
Solution Approach 1:
The control module implements feedback by continuously monitoring the transmitter's power level and using this information to control the SPS receiver's operational state. When transmitter power exceeds a threshold, the receiver is disabled; when power decreases below the threshold, the receiver is enabled. This feedback mechanism ensures optimal interference avoidance while minimizing unnecessary power consumption.
Solution Approach 2:
The system changes the operational parameter of the SPS receiver (enabled/disabled state) based on transmitter power conditions. By adjusting this binary parameter dynamically, the system achieves interference avoidance during high power periods while maintaining receiver functionality during low power periods, optimizing the balance between interference reduction and power consumption.
Data Source
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AI summary
A control module interconnecting a transmitter portion and a signal receiver portion of a mobile device is provided. The control module monitors the transmitter portion of the mobile device and, based on the monitored condition, alters the mobile device to inhibit the ability of a transmission signal from a transmitter to interfere with the signal receiver portion, i.e., intelligent blanking. In other words, the control module may disable or modify the signal receiver portion when power on the transmitter portion exceeds a predetermined power threshold level. Alternatively the control module may force the transmitter portion to transmit at a reduced power level.