Multi-Port PRS Channel Reconstruction for DL-AoD Estimation
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Solution Overview
Problem
Existing wireless positioning technologies, particularly in 5G networks, face challenges in accurately determining the downlink angle of arrival (DL-AoD) due to limitations in utilizing multi-port positioning reference signals (PRS) for precise angle estimation.
Innovation Solution
A method and system for wireless positioning that involves receiving antenna parameters for multiple antenna ports of a transmission-reception point (TRP), obtaining positioning measurements of PRS resources, reconstructing the underlying physical channel, and determining the DL-AoD measurement based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multi-port PRS resources are used for positioning measurements, then positioning accuracy is improved, but the complexity of channel reconstruction and angle estimation increases
Solution Approach 1:
The patent segments the channel estimation process by first estimating individual channel responses for each antenna port separately using PRS measurements, then combining these segmented estimates through coherent integration to reconstruct the overall physical channel. This segmentation approach enables accurate multi-port channel reconstruction while managing computational complexity through a structured multi-step process.
Solution Approach 2:
The patent introduces an intermediary channel response estimation step that serves as a bridge between raw PRS measurements and final angle-of-arrival estimation. By first estimating channel responses for each antenna port as intermediate results, then combining these intermediaries, the system achieves accurate positioning while organizing the complex reconstruction process into manageable stages.
2Measurement precision
If multiple antenna ports are utilized for PRS transmission, then downlink angle of arrival estimation accuracy is improved, but the processing complexity at the UE increases
Solution Approach 1:
The UE processes each antenna port's PRS measurements separately to estimate individual channel responses, then combines these segmented estimates. This segmentation reduces the complexity burden on the UE by breaking down the multi-port processing into manageable per-port operations followed by a combination step, rather than requiring simultaneous processing of all ports together.
Solution Approach 2:
The patent performs preliminary channel response estimation for each antenna port before the final angle-of-arrival calculation. By pre-estimating and storing channel responses for individual ports as intermediate results, the UE prepares data in advance, reducing the computational burden during the final AoD estimation step and organizing complex processing into preparatory and final stages.
3Measurement precision
If PRS measurements from multiple antenna ports are combined, then positioning precision is enhanced, but the time and computational resources required increase
Solution Approach 1:
The system performs preliminary channel response estimation for each antenna port and stores these intermediate results before the final combination step. By preparing channel response data in advance for each port, the system reduces the computational workload during the final positioning calculation, organizing the time-consuming processing into preparatory estimation phases and a final integration phase.
Solution Approach 2:
The patent segments the measurement processing into distinct per-port channel estimation steps followed by a combination step. This segmentation allows the system to process and store intermediate channel response results for each antenna port separately, enabling efficient resource utilization and reducing peak computational demands compared to processing all ports simultaneously.
Data Source
AI summary
Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) receives a set of antenna parameters for a plurality of antenna ports of a transmission-reception point (TRP), obtains positioning measurements of a plurality of positioning reference signal (PRS) resources transmitted on the plurality of antenna ports, reconstructs an underlying physical channel between the TRP and the UE based on the positioning measurements of the plurality of PRS resources, and determines a downlink angle of arrival (DL-AoD) measurement from the TRP to the UE based on the reconstructed underlying physical channel.