NTN Uplink Pre-Compensation for DMRS Phase Continuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In non-terrestrial network systems, rapid satellite movement causes significant Doppler shifts and delays, leading to phase discontinuity during joint channel estimation using DMRS bundles, which existing technologies struggle to address.
Innovation Solution
A method for wireless communication involves segmenting a time period into frequency compensation segments based on first information, considering phase continuity requirements to enable effective joint channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If joint channel estimation is performed using DMRS bundle in NTN systems, then channel estimation accuracy is improved, but phase continuity cannot be ensured due to rapid satellite movement causing large phase shifts
Solution Approach 1:
The time domain window corresponding to the DMRS bundle is divided into multiple frequency compensation segments. Each segment is processed independently with its own frequency compensation, allowing phase continuity to be maintained within each segment while accommodating phase shifts between segments due to satellite movement.
Solution Approach 2:
Frequency compensation values are dynamically adjusted for each segment based on estimated frequency offsets caused by satellite Doppler effects. This parameter change approach allows the system to adapt to rapidly changing channel conditions while maintaining estimation accuracy.
2Stability of the object's composition
If frequency compensation segments are introduced to maintain phase continuity, then phase stability is improved, but system complexity increases due to additional processing requirements
Solution Approach 1:
The time domain window corresponding to the DMRS bundle is divided into multiple frequency compensation segments. Each segment is processed independently with its own frequency compensation, allowing phase continuity to be maintained within each segment while accommodating phase shifts between segments due to satellite movement.
Solution Approach 2:
Frequency compensation values are dynamically adjusted for each segment based on estimated frequency offsets caused by satellite Doppler effects. This parameter change approach allows the system to adapt to rapidly changing channel conditions while maintaining estimation accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures phase continuity, enabling accurate joint channel estimation in non-terrestrial networks by compensating for frequency offsets due to satellite movement.
Implementation Method 1
satellite movement may cause rapid changes in Doppler shifts and delays, resulting in a large phase shift in the time domain window corresponding to the DMRS bundle
Data Source
AI summary
A method and an apparatus for wireless communication are provided. One example method includes: determining, by a terminal device operating in a non-terrestrial network (NTN) system, a plurality of frequency compensation segments within a first time period based on first information, wherein the first information comprises information of demodulation reference signal (DMRS) bundle used for joint channel estimation, and the first time period comprises at least one time domain window corresponding to the DMRS bundle; and performing, by the terminal device, pre-compensation on an uplink channel corresponding to the first time period based on the plurality of frequency compensation segments.