Multi-Port PTRS Time Mapping for DFT-s-OFDM Uplink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G mobile communication systems using high-frequency bands, the phase noise caused by non-ideal antennas affects data transmission performance, and existing protocols lack a time domain signal mapping rule for multiple phase tracking reference signal (PTRS) ports when using DFT-s-OFDM waveforms, necessitating a solution for efficient resource allocation.
Innovation Solution
A method for determining and allocating phase tracking reference signal (PTRS) groups across multiple PTRS ports, ensuring balanced pilot density and accurate phase noise measurement by employing orthogonal cover codes and time domain signal mapping rules, allowing for multi-port PTRS transmission in DFT-s-OFDM waveforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple PTRS ports are used to measure phase noise for multiple data streams, then measurement precision is improved, but device complexity increases due to lack of time domain resource mapping rules
Solution Approach 1:
The patent segments the time domain resources by dividing them into multiple slots, with each slot assigned to a specific PTRS port. This segmentation allows multiple PTRS ports to be multiplexed in the time domain without interfering with each other, providing clear mapping rules that reduce system complexity while enabling accurate phase noise measurement for multiple data streams
Solution Approach 2:
The patent introduces time domain slot division as an additional dimension for resource allocation. By allocating different time slots to different PTRS ports, the system transforms the resource allocation problem from a spatial/frequency domain issue into a time domain solution, thereby simplifying the overall resource management while supporting multi-port phase noise measurement
2Ease of operation
If PTRS is inserted into time domain signal before DFT module, then ease of operation is improved, but pilot density becomes unbalanced across multiple PTRS ports
Solution Approach 1:
The patent applies local quality by allocating different time slot resources to different PTRS ports based on their specific requirements. Each PTRS port receives an appropriate share of time domain resources, ensuring balanced pilot density across all ports while maintaining the operational simplicity of inserting PTRS before the DFT module
Data Source
AI summary
This application provides a data transmission method and related apparatus that address the problem of time domain resource mapping of a plurality of PTRS ports. The data transmission method includes: determining x phase tracking reference signal (PTRS) groups, where each of the x PTRS groups includes y PTRS samples, and x and y are integers greater than or equal to 2; determining a first PTRS corresponding to a first PTRS port, where the first PTRS includes z1 PTRS samples; determining a second PTRS corresponding to a second PTRS port, where the second PTRS includes z2 PTRS samples; and during uplink data transmission, sending the first PTRS corresponding to the first PTRS port and the second PTRS corresponding to the second PTRS port. z1 and z2 are positive integers, and the sum of z1 and z2 is equal to the product of x and y.