Uplink Selection Based on Signal Power to Mitigate IMD
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Solution Overview
Problem
Electronic devices face limitations in concurrent multiple uplink transmissions due to intermodulation distortion (IMD) noise, which reduces data transmission rates and may prevent successful reception of signals across certain frequency bands.
Innovation Solution
A portable communication device and base station are designed with dual communication circuitries for different frequency bands, allowing the processor to adjust transmission modes based on received signal power ranges, enabling concurrent or single cellular connections to manage IMD noise by selectively transmitting signals across multiple or single frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple uplink transmissions are performed concurrently on multiple frequency bands, then data transmission rate is improved, but intermodulation distortion noise increases causing signal reception failure
Solution Approach 1:
The patent implements dynamic selection of uplink transmission modes (single frequency band or multiple frequency bands) based on real-time communication state information. The electronic device monitors reference signal received power and other metrics to determine whether concurrent transmission on multiple frequency bands is feasible, thereby adapting the transmission strategy to current channel conditions to avoid intermodulation distortion while maximizing data rate.
Solution Approach 2:
The patent changes the transmission parameter (number of frequency bands used for uplink) based on communication state. When channel conditions are favorable, multiple frequency bands are used to increase throughput; when conditions deteriorate or intermodulation distortion is detected, the system switches to single frequency band transmission to ensure reliable signal reception.
2Productivity
If multiple frequency bands are used for concurrent transmission, then transmission efficiency is improved, but intermodulation distortion occurs reducing transmission reliability
Solution Approach 1:
The patent measures and utilizes intermodulation distortion characteristics to make informed transmission decisions. By monitoring reference signal received power and detecting signs of intermodulation distortion, the system converts the harmful effect into useful feedback information that guides the selection of appropriate transmission modes, thereby preventing signal reception failure while maintaining high transmission efficiency when possible.
Solution Approach 2:
The patent implements a feedback mechanism where the electronic device monitors communication state information including reference signal received power from the base station. This feedback is used to dynamically adjust the uplink transmission strategy, switching between single and multiple frequency band transmissions based on detected channel conditions and intermodulation distortion levels.
Data Source
AI summary
A portable communication device is provided. The communication device includes a first communication circuitry configured to perform communication using a first frequency band, a second communication circuitry configured to perform communication using a second frequency band, and at least one processor configured to receive a reference signal transmitted from a first external electronic device using the first communication circuitry, and when a received power corresponding to the reference signal belongs to a specified first range, communicate with at least one external electronic device through multiple cellular connections by transmitting a first signal of the first frequency band to the first external electronic device through a first cellular connection established using the first communication circuitry and substantially concurrently transmitting a second signal of the second frequency band to a second external electronic device through a second cellular connection established using the second communication circuitry.