Eight Port Uplink Precoding and Power Scaling
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Solution Overview
Problem
Existing wireless communication systems face challenges with multiple port transmissions, particularly with eight ports, due to complexities in uplink transmission and power management, leading to inefficiencies in spectral efficiency and power delivery.
Innovation Solution
Enhancements to the precoding matrix and codebook design for uplink transmissions with eight ports, including partial coherence configurations and power scaling factors for different UE antenna architectures, along with DCI enhancements for efficient port grouping and SRS resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If eight port transmissions are implemented to increase data throughput, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the eight port transmission system into multiple codebook subsets, each handling specific port combinations. This segmentation allows the system to manage complexity by dividing the large 8x8 precoding matrix into smaller, more manageable subsets that can be independently selected and applied based on channel conditions.
Solution Approach 2:
The patent changes the parameter of codebook structure by introducing partial coherence configurations that differ from traditional full coherence assumptions. This parameter change allows the system to adapt to realistic hardware constraints while maintaining high spectral efficiency through optimized precoding matrices that reflect actual device capabilities.
2Power
If power scaling factors are applied to manage power delivery across eight ports, then power management is improved, but loss of energy increases
Solution Approach 1:
The patent applies different power scaling factors to different port groups within the eight port system. Instead of uniform power distribution, each port or port group receives optimized power scaling based on its specific channel conditions and coherence characteristics. This local quality approach minimizes overall power loss by concentrating power where it is most effective.
Solution Approach 2:
The patent uses partial coherence configurations where only subsets of ports are fully coherent rather than all eight ports. This partial action approach allows power to be efficiently distributed across coherent subsets while avoiding the excessive power requirements and losses that would result from attempting full coherence across all ports.
3Ease of manufacture
If codebook subsets are configured for partial coherence to simplify device architecture, then ease of manufacture is improved, but manufacturing precision decreases
Solution Approach 1:
The patent introduces dynamic codebook subset selection where the system can adaptively choose between different partial coherence configurations based on real-time channel conditions and device capability reports. This dynamics allows the system to maintain manufacturing simplicity while achieving high precision when needed by switching to more sophisticated codebook subsets when channel conditions warrant it.
Solution Approach 2:
The patent creates a universal codebook structure that can function at multiple levels of precision. The same codebook framework supports both simplified partial coherence configurations for ease of manufacture and more precise full coherence configurations when manufacturing precision is achieved, making the system universally applicable across different device capabilities.
Data Source
AI summary
An apparatus and system of providing uplink transmission with eight ports are described. Precoders for partial and full coherent UE uplink transmissions are described, in addition to downlink control information (DCI) enhancements and sounding reference signal (SRS) configurations for codebook-based uplink transmission. Precoder matrices are provided for different ranks for the eight port transmissions.