Radio Propagation Correction Using Reference-Point Similarity
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Solution Overview
Problem
Existing methods for correcting radio wave propagation properties fail when there are no measurement points in the evaluation area, preventing the calculation of reliability and correction.
Innovation Solution
A radio wave propagation property calculation device that calculates feature amounts in both evaluation and reference points using a predetermined propagation estimation formula, and corrects estimation values based on actual measurements from measurement points in a different area, utilizing a correction formula that considers the similarity and relative values of these feature amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement points are located in the evaluation area to correct radio wave propagation properties, then estimation accuracy is improved, but the method fails when no measurement points exist in the evaluation area
Solution Approach 1:
The patent introduces a reference point as an intermediary element. The reference point is located in the evaluation area and serves as a mediator to establish the correction relationship. By using the reference point's received electric power (which can be measured or estimated) as a baseline, the system can correct propagation properties even when no actual measurement points exist in the evaluation area. The reference point acts as a bridge between the estimation system and the correction mechanism.
Solution Approach 2:
The patent creates a virtual copy of the measurement process by calculating the received electric power at the reference point using the propagation estimation formula, rather than requiring actual physical measurements at multiple points. This virtual copying allows the system to simulate measurement conditions and perform corrections based on calculated values, enabling the method to work when physical measurement points are unavailable.
2Measurement precision
If multiple measurement points are used to calculate degree of reliability, then correction accuracy is improved, but device complexity and measurement setup requirements increase
Solution Approach 1:
The patent extracts the essential correction function from the complex multi-point measurement system. Instead of requiring multiple measurement points to calculate degrees of reliability, the system extracts the correction capability and implements it through a simplified reference point approach. The reference point provides sufficient information for correction without needing the complex multi-point measurement arrangement, thereby reducing device complexity while maintaining correction accuracy.
Solution Approach 2:
The patent changes the measurement parameters from multiple spatial points to a single reference point with specific characteristics. By focusing on the received electric power at the reference point and using feature amounts that characterize the evaluation area, the system achieves correction accuracy without requiring multiple measurement points. This parameter transformation simplifies the measurement setup while preserving the essential correction functionality.
Data Source
AI summary
A radio wave propagation property calculation device includes processing circuitry to calculate, using a predetermined propagation estimation formula, a first estimation value of electric power received at a first evaluation point, and a second estimation value of electric power received at a first reference point, to calculate a first feature amount being related to a first area including the first evaluation point, a second feature amount being related to a second area including the first reference point, a third feature amount being related to a third area including a first measurement point, and a fourth feature amount being related to a area including a second measurement, and to calculate a relative value of the first and second estimation values, actually measure and correct the first estimation value based on the first to fourth feature amounts and the calculated relative value, and calculate a correction value of the first estimation value.