Radio Wave Propagation Estimation Using Segmented Technique Selection
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Solution Overview
Problem
Existing radio wave propagation estimation methods struggle to maintain high accuracy when the transmission point differs from the point where actual measurements were taken, as the error between estimated and measured values is significantly affected by antenna position, limiting the applicability of past measured values for new installation locations.
Innovation Solution
A radio wave propagation characteristic estimation apparatus and method that classify measurement conditions to determine the optimum estimation technique from multiple techniques based on actual measured values, allowing for accurate estimation by selecting the appropriate technique for each group of conditions and using it to estimate radio wave propagation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single radio wave propagation characteristic estimation technique is used for all locations, then the device complexity is reduced, but the estimation accuracy deteriorates when the transmission point differs from the measurement point
Solution Approach 1:
The patent divides the estimation technique selection into segments based on transmission point locations. Multiple estimation techniques are prepared for different transmission point segments, and the appropriate technique is selected based on the current transmission point. This segmentation allows high accuracy for each specific location while managing overall system complexity through structured organization.
Solution Approach 2:
The patent changes the parameter of estimation technique selection based on the transmission point location parameter. By storing multiple estimation techniques and selecting the appropriate one according to the transmission point, the system adapts the estimation approach to match the specific measurement conditions, thereby maintaining high accuracy across different locations.
2Measurement precision
If multiple radio wave propagation characteristic estimation techniques are stored and selected based on transmission point, then the estimation accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent performs preliminary action by pre-storing multiple radio wave propagation characteristic estimation techniques in the storage unit before actual estimation is needed. The techniques are organized and prepared in advance, allowing quick selection based on the transmission point without requiring complex real-time analysis or computation.
3Productivity
If actual measured values from one location are used for estimation at another location, then the productivity is improved by reusing data, but the measurement precision deteriorates due to position-dependent errors
Solution Approach 1:
The patent changes the estimation technique parameter based on the transmission point location to compensate for position-dependent errors. By selecting different estimation techniques tailored to specific transmission points, the system maintains measurement precision when reusing actual measured values across different locations, rather than applying a single technique universally.
Data Source
AI summary
To estimate radio wave propagation characteristics with high estimation accuracy, even when used for a variety of purposes. An estimation technique determining unit determines, for each of groups classified in accordance with a measurement condition, an optimum radio wave propagation characteristic estimation technique from among a plurality of radio wave propagation characteristic estimation techniques, based on an actual measured value of radio waves. A radio wave propagation characteristic estimating unit discriminates a group corresponding to the given measurement condition, sets the optimum radio wave propagation characteristic estimation technique corresponding to the discriminated group, and estimates the radio wave propagation characteristics in accordance with the set radio wave propagation characteristic estimation technique.