Communication Circuit Power Control for Spurious Emissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of 5G EN-DC, terminal devices face challenges in maintaining transmission power within specified limits while avoiding spurious emissions due to intermodulation distortion, which can lead to communication non-compliance if uniform power reduction is applied, potentially causing one transmitter circuit's power to fall below its lower limit.
Innovation Solution
A communication circuit with two transmitter circuits that can adjust their power levels independently, where the second transmitter circuit is placed in a transmission halt state if its power falls below a threshold, and the first transmitter circuit increases its power to ensure compliance with spurious emissions requirements, thereby preventing both from falling below their respective lower limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If uniform transmission power reduction is applied to both LTE and NR transfer circuits to satisfy spurious emissions requirements, then spurious emissions are reduced, but transmission power of one circuit may fall below the lower limit
Solution Approach 1:
The patent divides the transmission power control into separate independent adjustments for each transfer circuit (LTE and NR) rather than uniform reduction. The control unit calculates and applies different power adjustment amounts to each circuit based on individual characteristics, allowing one circuit to reduce power to meet spurious emissions requirements while preventing the other circuit from falling below its power lower limit.
Solution Approach 2:
The patent applies different power control strategies to different transfer circuits based on their local characteristics. Each circuit receives customized power adjustment tailored to its specific intermodulation distortion contribution and operational requirements, rather than applying a blanket uniform reduction to all circuits.
2Object-generated harmful factors
If transmission power of one transfer circuit is decreased to reduce intermodulation distortion, then spurious emissions are reduced, but communication performance may deteriorate
Solution Approach 1:
The patent dynamically adjusts transmission power parameters of individual transfer circuits based on calculated intermodulation distortion levels. The control unit modifies power settings selectively for each circuit to reduce harmful intermodulation products while maintaining sufficient power levels to preserve communication performance and reliability.
Data Source
AI summary
A communication circuit includes a first transfer circuit that includes a first transmitter circuit, and a second transfer circuit that includes a second transmitter circuit that can transmit a signal simultaneously with the first transmitter circuit. The second transmitter circuit is configured to be placed in a transmission halt state when transmission power of the second transmitter circuit resulting from being decreased by a predetermined value is lower than or equal to a threshold.