Reference Signal PDP Merging for Accurate 5G NR Channel Estimation
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Solution Overview
Problem
In 5G NR wireless communication systems, channel estimation performance is affected by the absence of always-present reference signals, leading to challenges in ensuring accurate channel estimation due to varying sample resolutions and QCL relationships among different reference signals.
Innovation Solution
A method and device for merging power delay profiles (PDPs) of reference signals by estimating multiple PDPs corresponding to different reference signals with quasi-co-location (QCL) relationships, adjusting sample resolution ratios, and combining them to obtain a merged PDP for improved channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple reference signals with different sample resolutions are used, then channel estimation coverage is improved, but merging complexity increases
Solution Approach 1:
The patent applies parameter changes by adjusting the sample resolution ratio of reference signals during the PDP merging process. When reference signals have different sample resolutions, the system modifies the sample resolution ratio parameter to align them, enabling accurate merging while maintaining channel estimation performance without excessive complexity
Solution Approach 2:
The patent introduces an intermediary approach by using a reference signal with higher sample resolution as a mediator during merging. The system identifies a reference signal with higher sample resolution and uses it as the basis for merging other reference signals with lower sample resolutions, simplifying the overall merging process while ensuring accurate channel estimation
2Productivity
If reference signals are merged to improve channel estimation, then data throughput increases, but processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-identifying reference signals with higher sample resolutions before the merging process. The system determines which reference signal should serve as the basis for merging in advance, enabling more efficient processing and reducing overall time consumption while maintaining improved channel estimation for higher data throughput
Data Source
AI summary
A method performed by user equipment in a wireless communication system includes receiving a plurality of reference signals from a base station, estimating a power delay profile (PDP) corresponding to each of the plurality of reference signals, and merging the PDPs corresponding to at least two reference signals, having a quasi-co-location (QCL) relationship, among the plurality of reference signals.