Radio Wave Intensity Correction Using Measured Data
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Solution Overview
Problem
Existing methods for creating precise maps of radio wave reception conditions require a large number of measurement points, leading to high costs and varying precision due to differences in measurement precision across points.
Innovation Solution
A received intensity calculation device that acquires theoretical values and measured values, determines a correction range based on the difference between them, and corrects theoretical values of radio wave intensity at reception points using a combination of geographical information and measurement data to create a highly precise map with reduced measurement points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of measurement points are used to create a precise radio wave condition map, then the measurement precision and map accuracy are improved, but the cost and complexity of data collection increase
Solution Approach 1:
The patent applies parameter changes by using different weights for theoretical values and measured values based on their reliability. The correction amount is adjusted according to the difference between measured and theoretical values, allowing the system to adaptively blend these sources rather than treating them equally, thus achieving high precision with fewer measurement points.
Solution Approach 2:
The patent introduces an intermediary correction mechanism that processes the difference between measured and theoretical values. This intermediary layer calculates correction amounts and applies them to theoretical values to generate corrected values, serving as a bridge that combines the strengths of both measurement and theory without requiring extensive measurements.
2Measurement precision
If measured values with high precision are collected at all points, then the map accuracy is improved, but the cost and time for data collection increase
Solution Approach 1:
The patent applies partial action by measuring radio wave conditions only at selected points rather than all points. The system uses theoretical values at unmeasured points and blends them with measured values using calculated correction amounts, achieving sufficient map accuracy without the time and cost of comprehensive measurement.
Solution Approach 2:
The patent implements feedback by using measured values to correct theoretical values. The difference between measured and theoretical values at measurement points is calculated, and this feedback information is used to adjust theoretical values at both measured and unmeasured points, continuously improving map accuracy without requiring re-measurement of all points.
3Ease of manufacture
If theoretical values are used without correction, then the data collection cost is reduced, but the map precision deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the correction amounts based on the difference between measured and theoretical values. The system changes the weight given to measured versus theoretical values according to local conditions, achieving high precision while maintaining cost-effectiveness through selective correction rather than universal measurement.
Solution Approach 2:
The patent creates a composite approach by combining theoretical values and measured values into corrected values. Rather than using one source exclusively, the system blends both sources with appropriate weights, creating a hybrid solution that achieves high precision without the full cost of comprehensive measurement.
Data Source
AI summary
A first acquisition unit acquires theoretical values of received intensity of radio waves from a transmission point received at a plurality of reception points. A second acquisition unit defines a reception point associated with one of a plurality of theoretical values of received intensity acquired by the first acquisition unit as a measurement point and acquires a measured value of received intensity at the measurement point thus defined. A determination unit that determines a correction range in accordance with a difference between the measured value of received intensity acquired by the second acquisition unit and the theoretical value of received intensity at the measurement point acquired by the first acquisition unit. A correction unit corrects the theoretical value of received intensity at the reception point included in the correction range determined by the determination unit, based on the measured value of received intensity acquired by the second acquisition unit.