LOS Path Determination Using Transmitter Polarization Characteristics
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in determining a line of sight (LOS) path due to the complexity of signal propagation and polarization characteristics.
Innovation Solution
The method involves determining the polarization used by a transmitter for reference signals (RS), receiving these signals with different polarization configurations, measuring their polarization characteristics, and comparing them to expected characteristics to determine if the RS was received in a LOS path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If polarization characteristics are used to determine LOS path, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The transmitter pre-configures multiple polarization states for reference signals before transmission. The receiver is pre-programmed with algorithms to analyze polarization characteristics. This preliminary preparation enables precise LOS determination without requiring complex real-time processing during operation.
Solution Approach 2:
Polarization characteristics serve as an intermediary parameter between the transmitted reference signal and the LOS path determination. Instead of directly analyzing complex signal propagation paths, the system uses polarization as a measurable intermediary that indirectly indicates LOS conditions, simplifying the overall measurement process.
2Measurement precision
If multiple polarization configurations are measured, then LOS determination accuracy is improved, but measurement time increases
Solution Approach 1:
The system transmits reference signals with different polarization configurations in periodic intervals rather than simultaneously. This allows the receiver to measure each configuration sequentially, reducing the total measurement time while still gathering sufficient data for accurate LOS determination through multiple measurements.
Solution Approach 2:
The system measures polarization characteristics across multiple configurations, using more measurements than the theoretical minimum. This excessive action provides redundancy that improves accuracy through statistical analysis, while the periodic timing ensures the total measurement duration remains acceptable for practical applications.
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 allows for accurate determination of the LOS path based on polarization characteristics, enhancing the precision of positioning calculations and improving communication efficiency in wireless communication systems.
Implementation Method 1
a transmitter for at least one RS
Implementation Method 2
measuring polarization characteristics of the first received polarization and the second received polarization
Data Source
AI summary
Method and apparatus to determine a line-of-sight (LOS) path based at least on polarization characteristics. The apparatus determines a polarization used by a transmitter for at least one RS. The apparatus receives the at least one RS with a first received polarization in a first configuration and a second received polarization in a second configuration that is different from the first configuration. The apparatus measures polarization characteristics of the first received polarization and the second received polarization. The apparatus determines whether the at least one RS was received in a LOS path from the transmitter based on the measured polarization characteristics and expected received polarization characteristics, wherein the expected received polarization characteristics are based on the determined polarization used by the transmitter.