PRS Bandwidth Stitching for Phase Compensation in Frequency Hopping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The 5G wireless communication systems face challenges in achieving precise positioning due to the complexity of frequency hopping and channel estimation, particularly in scenarios involving multiple frequency ranges and diverse network architectures, which affect the accuracy and efficiency of positioning reference signals.
Innovation Solution
The implementation of bandwidth stitching for positioning reference signals (PRS) is introduced, allowing for enhanced phase compensation and alignment across different frequency bands, utilizing comb patterns and muting patterns to optimize signal overlap and alignment in both time and frequency domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency hopping is implemented for positioning reference signals, then spectral efficiency is improved, but channel estimation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring comb patterns and muting patterns for positioning reference signals before frequency hopping occurs. The comb pattern defines predetermined subcarrier spacing and the muting pattern defines predetermined resource element positions in advance, allowing the receiver to prepare channel estimation templates beforehand. This reduces the real-time complexity of channel estimation during frequency hopping while maintaining spectral efficiency.
2Measurement precision
If bandwidth stitching is implemented across multiple frequency ranges, then positioning accuracy is improved, but signal alignment complexity increases
Solution Approach 1:
The patent applies parameter changes by systematically varying comb pattern parameters (such as comb size and subcarrier offset) and muting pattern parameters across different frequency ranges. These parameter changes are predetermined and coordinated between frequency ranges, enabling bandwidth stitching for improved positioning accuracy while reducing alignment complexity through standardized parameter relationships.
3Productivity
If comb patterns and muting patterns are used for signal overlap, then frequency reuse is improved, but pattern coordination complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into multiple ranges, each with its own comb pattern and muting pattern configuration. This segmentation allows independent optimization of each frequency range while maintaining overall system coordination through standardized pattern relationships. The segmentation enables frequency reuse across ranges without requiring complex global pattern coordination.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Disclosed are techniques for wireless communication. In an aspect, a receiver device receives a first plurality of positioning reference signal (PRS) resources scheduled within a PRS bandwidth on a plurality of time intervals, the first plurality of PRS resources staggered in frequency across the plurality of time intervals, each pair of consecutive PRS resources of the first plurality of PRS resources partially overlapping in frequency, and performs phase estimation for the first plurality of PRS resources based, at least in part, on the overlap in frequency between each pair of consecutive PRS resources.