Divided Amplifier Control for Blanked PRB Interference Mitigation
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Solution Overview
Problem
Residual energy transmission in blanked Physical Resource Blocks (PRBs) due to spectral leakage, sidelobes from modulation techniques, and nonlinearity of power amplifiers causes interference, affecting communication quality and extending beyond intended networks.
Innovation Solution
Utilizing a plurality of amplifiers to selectively deactivate those associated with blanked PRBs, ensuring no energy is transmitted in these regions by distributing different frequency bands to distinct amplifiers and employing a controller for intelligent deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PRB blanking is implemented to mitigate interference, then network performance is improved, but residual energy transmission continues due to spectral leakage, sidelobes, and amplifier nonlinearity
Solution Approach 1:
The patent divides the amplifier into multiple segments, where each amplifier handles a specific subset of PRBs. This segmentation allows selective deactivation of individual amplifiers corresponding to blanked PRBs, preventing residual energy transmission from those specific resource blocks while maintaining operation of other amplifiers handling active PRBs.
2Measurement precision
If multiple amplifiers are used to distribute different frequency bands, then control over energy transmission is improved, but device complexity increases
Solution Approach 1:
The amplifier system is segmented into multiple independent amplifiers, each responsible for specific frequency bands or PRBs. This segmentation enables precise control over which amplifiers are active, allowing the system to selectively transmit or block energy in specific frequency regions while maintaining overall system manageability through modular architecture.
Solution Approach 2:
The system dynamically activates or deactivates specific amplifiers based on which PRBs are blanked or active. This dynamic control allows the system to adapt to varying transmission requirements, enabling precise energy control by turning on or off only the amplifiers needed for current transmission conditions.
Data Source
AI summary
Embodiments of the present disclosure are directed to systems and methods for mitigating energy transmitted on subcarriers in a communications network. For example, a signal intended for transmission can be separated and distributed to different amplifiers at the signal amplification stage. Amplifiers that correspond with regions of blanked PRBs in the signal can be selectively deactivated. In this way, energy wastage is reduced and interference is mitigated due to preventing residual energy transmission that may occur in the blanked regions even when no information is being carried in those regions of the signal.