PT-RS Power Boosting for Multi-Layer Uplink Phase Noise
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Solution Overview
Problem
Oscillator phase noise increases with carrier frequency, particularly in millimeter-wave communications, leading to significant common phase errors in wireless signals, which existing technologies struggle to effectively compensate for, especially in multi-layer uplink transmissions.
Innovation Solution
A method where user equipment (UE) determines and applies separate power boosts to phase-tracking reference signal (PT-RS) ports, enabling better phase noise compensation by distributing multi-layer uplink transmissions across multiple PT-RS ports and adjusting power boosts based on the number of layers and precoder configurations, allowing for improved phase tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power boost is applied to all PT-RS ports in multi-layer uplink transmissions, then the implementation complexity is reduced, but the phase noise compensation effectiveness deteriorates
Solution Approach 1:
The patent applies different power boost values to different PT-RS ports based on the number of layers mapped to each port. Specifically, ports with more layers receive higher power boosts than ports with fewer layers, optimizing phase noise compensation for each port's specific conditions rather than using a uniform approach.
2Reliability
If separate power boosts are applied to different PT-RS ports, then the phase noise compensation effectiveness is improved, but the device complexity increases
Solution Approach 1:
The patent segments the power boost determination process by port, where each PT-RS port's power boost is independently determined based on the number of layers mapped to that port. This segmentation allows for optimized compensation per port while maintaining clear, rule-based implementation.
Solution Approach 2:
The patent changes the power boost parameter dynamically based on the number of layers mapped to each PT-RS port. The power boost value is adjusted according to the layer count, with higher layer counts receiving higher power boosts, thereby adapting the system to varying transmission conditions.
3Measurement precision
If higher power boosts are applied to PT-RS ports with more layers, then the phase tracking accuracy is improved, but the overall transmission power consumption increases
Solution Approach 1:
The patent adjusts the power boost parameter based on the number of layers per port, applying higher power boosts only where needed (ports with more layers) rather than uniformly across all ports. This selective parameter adjustment improves phase tracking accuracy for complex ports while minimizing unnecessary power consumption.
Data Source
AI summary
Techniques related to multi-layer wireless communications are disclosed. Some aspects of the disclosure relate to devices and methods for determining a transmission power boost for a phase-tracking reference signal (PT-RS). A wireless user equipment (UE) may map a multi-layer uplink transmission to a plurality of PT-RS ports by distributing the layers of the multi-layer uplink transmission among the plurality of PT-RS ports. The UE may determine a first transmission power boost for a first PT-RS port, and a second transmission power boost, different from the first transmission power boost, for a second PT-RS port. The UE may transmit a first PT-RS corresponding to the first PT-RS port utilizing the first transmission power boost, and the second PT-RS corresponding to the second PT-RS port, frequency division multiplexed with the first PT-RS, utilizing the second transmission power boost. Other aspects, embodiments, and features are also claimed and described.