UAV Frequency Switching for Faster Interference Measurement
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Solution Overview
Problem
Current interference measurement methods for unmanned aerial vehicles (UAVs) are inefficient, as they can only measure one frequency point per measurement period, leading to low accuracy and long measurement times, which hinders the determination of the optimal working frequency point and affects image transmission performance and flight distance.
Innovation Solution
A method that synchronizes the UAV and its remote control to measure multiple frequency points within a single measurement period by switching between frequency points, accumulating Received Signal Strength Indication (RSSI) values, and re-determining the working frequency point based on interference values and Signal-Noise Ratio (SNR), allowing for faster interference measurement and improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If only one frequency point is measured per measurement period, then the measurement process is simple, but the interference measurement efficiency is low and the measurement time is long
Solution Approach 1:
The measurement period is segmented into multiple scheduling slices, with each slice dedicated to measuring a specific frequency point. This allows parallel measurement of multiple frequency points within a single measurement period, transforming the sequential measurement process into a structured parallel approach that improves efficiency while maintaining measurement accuracy
Solution Approach 2:
The system implements periodic frequency point switching within each measurement period, where the frequency point to be measured changes periodically according to the scheduling slice timing. This periodic action enables systematic coverage of all frequency points while maintaining a regular measurement rhythm, improving both efficiency and determinism of the measurement process
2Measurement precision
If multiple frequency points are measured sequentially, then the measurement coverage is complete, but the frequency point corresponding to interference minimum cannot be determined timely
Solution Approach 1:
The measurement period is divided into multiple scheduling slices, with each slice assigned to measure a specific frequency point. This segmentation enables simultaneous measurement of multiple frequency points across different slices, completing full frequency coverage while identifying the optimal frequency point within the same measurement period rather than requiring sequential measurement across multiple periods
Solution Approach 2:
The system pre-configures the scheduling slices and frequency point mapping before measurement begins. This preliminary arrangement ensures that when measurement starts, all frequency points are already assigned to specific time slots, enabling immediate parallel measurement and rapid determination of the optimal frequency point without delays from dynamic decision-making during measurement
3Measurement precision
If frequency point switching is performed for each measurement, then all frequency points can be measured, but the measurement complexity increases
Solution Approach 1:
The measurement process is segmented into discrete scheduling slices with predetermined frequency point assignments. This segmentation transforms the complex task of measuring multiple frequency points into a series of simple, isolated measurement tasks, each handled in its own scheduling slice, reducing overall process complexity while maintaining comprehensive measurement coverage
Solution Approach 2:
The system employs periodic frequency point switching based on pre-established scheduling slice patterns. This periodic action creates a predictable, rhythmic measurement process where frequency switching follows a regular timetable, simplifying control logic and making the measurement process more manageable despite measuring multiple frequency points
Data Source
AI summary
A method for determining a working frequency point includes: each measurement period and each frequency point to be measured in each measurement period are acquired; whether a present moment is a first scheduling slice of a present measurement period is judged; if YES, frequency point switching and measurement are sequentially performed to obtain a Received Signal Strength Indication (RSSI) value of each frequency point to be measured in the present measurement period, frequency point switching back to a present working frequency point is performed, and the judging is re-executed until an RSSI value of each frequency point to be measured in each measurement period is measured; if NO, the judging is re-executed; and a working frequency point is redetermined according to a relationship between the RSSI value of each frequency point to be measured in each measurement period and an interference value of the present working frequency point.