Multi-Layer PTRS Mapping in DFT-s-OFDM for Phase Noise Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-frequency wireless communication networks like 5G and 6G, phase noise and center frequency offset increase, leading to deteriorated demodulation performance due to the lack of a mapping rule for phase tracking reference signals (PTRS) in DFT-s-OFDM symbols.
Innovation Solution
A method for mapping PTRS to multiple layers of DFT-s-OFDM symbols, involving communication devices that send and receive indication information to determine PTRS ports, layers, and data mapping, with orthogonal cover codes and flexible pattern parameters to reduce interference and improve phase noise estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PTRS is mapped to multiple layers of DFT-s-OFDM symbols, then phase noise estimation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the PTRS mapping into multiple layers of DFT-s-OFDM symbols, where each layer can be independently configured with specific mapping rules. This allows the receiving end to perform phase noise estimation across multiple layers, improving accuracy while maintaining manageable complexity through structured segmentation of the mapping process.
Solution Approach 2:
The patent extends PTRS mapping from a single layer to multiple layers in the vertical dimension of the signal structure. By mapping PTRS to multiple layers of DFT-s-OFDM symbols, the system gains additional dimensions for phase noise estimation, improving measurement precision while the structured multi-layer approach prevents exponential complexity increase.
2Productivity
If PTRS mapping is optimized for multiple layers, then system throughput is improved, but resource utilization complexity increases
Solution Approach 1:
The patent creates a universal PTRS mapping framework that works across multiple layers of DFT-s-OFDM symbols with consistent mapping rules. This multi-functional mapping approach allows the same PTRS structure to serve multiple layers simultaneously, improving system throughput while avoiding the need for complex layer-specific customization that would increase resource allocation complexity.
Solution Approach 2:
The patent optimizes system throughput by adjusting PTRS mapping parameters such as mapping position, density, and distribution across multiple layers. By changing these parameters systematically rather than redesigning the entire mapping structure, the system achieves improved throughput with controlled complexity in resource allocation.
Data Source
AI summary
A PTRS sending method and receiving method and a communication apparatus. The method includes: a terminal device sends first information to a network device, receives first indication information from the network device, and sends a DFT-s-OFDM symbol to which a PTRS is mapped to the network device. In the method, a rule for mapping the PTRS to a plurality of layers of the DFT-s-OFDM symbol is specified, to ensure phase noise estimation performance and improve a demodulation capability.