Non-Uniform Reference Signal Generation for Wireless Systems
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Solution Overview
Problem
Existing methods for generating and transmitting reference signals in wireless communication systems are resource-intensive and inefficient, particularly in assigning uniform comb-type structures for reference signal resources, which limits data throughput and beamforming capabilities.
Innovation Solution
Implementing a system that assigns non-uniformly distributed frequencies and time slots for reference signals, using a base coset pattern tiled across a resource grid, allowing for more efficient channel estimation and beamforming by reducing bandwidth usage and enabling greater data throughput and support for multiple users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uniform comb-type structures are used for reference signal resources, then resource allocation is simple, but data throughput is limited and bandwidth usage is inefficient
Solution Approach 1:
The patent applies asymmetry by transitioning from uniform comb-type reference signal structures to non-uniform distributed structures. Specifically, reference signals are placed at non-uniformly spaced frequency subcarriers and time slots, creating an asymmetric pattern that improves channel estimation accuracy and allows more efficient bandwidth utilization, thereby increasing data throughput while maintaining manageable allocation complexity through standardized patterns
Solution Approach 2:
The patent extends the reference signal resource allocation from one-dimensional uniform spacing to two-dimensional non-uniform distribution across both frequency and time dimensions. By distributing reference signals non-uniformly across frequency subcarriers and time slots simultaneously, the system achieves better channel estimation in multi-dimensional space, enabling improved throughput without excessive complexity
2Measurement precision
If more reference signal resources are allocated, then channel estimation accuracy improves, but bandwidth consumption increases
Solution Approach 1:
The patent changes the distribution parameters of reference signals from uniform to non-uniform spacing in both frequency and time domains. This parameter change allows reference signals to be strategically positioned where they provide maximum channel estimation value while minimizing overall bandwidth consumption, achieving better estimation accuracy with fewer resources
Solution Approach 2:
The patent applies local quality by concentrating reference signal resources in specific local regions of the time-frequency grid where channel conditions require enhanced estimation, rather than uniformly distributing resources everywhere. This localized approach improves channel estimation accuracy in critical areas while reducing overall bandwidth consumption
3Adaptability or versatility
If uniform comb-type reference signal structures are used, then implementation is straightforward, but beamforming capabilities are limited
Solution Approach 1:
The patent introduces dynamics by enabling flexible, non-uniform configuration of reference signal patterns that can adapt to different beamforming requirements. The system can dynamically adjust the distribution pattern of reference signals across frequency and time to match varying channel conditions and beamforming needs, enhancing adaptability while maintaining reasonable structural complexity through standardized pattern definitions
Data Source
AI summary
Apparatuses, systems, and techniques to indicate resources of reference signals. In at least one embodiment, a system includes one or more processors to receive an indication of two or more non-uniformly distributed frequencies or time slots of two or more corresponding reference signals to be transmitted by the system.