Radar Velocity Correction for Angle-Related Measurement Errors
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Solution Overview
Problem
Radar systems face inaccuracies in velocity measurements when the angle between the target object and the radar system falls within a specific range, leading to unreliable velocity calculations.
Innovation Solution
A radar system with multiple RF circuits and a processing circuit that measures range and angle, calculates coordinates, and obtains combinations of cycles to determine velocities, using statistical values to correct velocity measurements through mean and standard deviation-based grouping and clustering algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar system uses conventional velocity calculation methods, then the system structure remains simple, but the velocity measurement accuracy deteriorates when the target angle falls within a specific range
Solution Approach 1:
The patent segments the velocity calculation process into multiple independent cycles, where each cycle calculates velocity based on coordinate differences. By dividing the measurement into discrete time segments and combining results statistically, the system achieves higher accuracy without requiring complex real-time computation, thus resolving the contradiction between precision and complexity.
Solution Approach 2:
The patent performs preliminary coordinate calculations and velocity computations for multiple cycles before final statistical processing. By pre-calculating intermediate values and storing them for later combination, the system reduces computational complexity during critical measurement phases while maintaining high velocity measurement accuracy through subsequent statistical aggregation.
2Measurement precision
If the radar system increases the number of measurement cycles and statistical processing, then the velocity accuracy improves, but the measurement time increases
Solution Approach 1:
The patent performs velocity calculations for multiple cycles beyond the minimum single-cycle requirement, using statistical processing of these partial measurements to achieve higher accuracy. By accepting the time cost of multiple cycles as a necessary investment for precision, the system resolves the contradiction by demonstrating that moderate time extension yields significant accuracy improvements through error averaging.
3Reliability
If the radar system uses single-cycle velocity calculation, then the response speed is fast, but the velocity measurement reliability deteriorates due to angle-related errors
Solution Approach 1:
The patent implements a feedback mechanism where velocity measurements from multiple cycles are statistically combined and averaged to produce a final reliable velocity value. This feedback loop allows the system to compensate for angle-related errors in individual cycles through aggregation, achieving high reliability while maintaining reasonable measurement efficiency by using a fixed number of cycles.
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
The method provides accurate and stable velocity measurements by reducing measurement errors, enabling precise tracking and collision detection.
Implementation Method 1
The radar system calculates the range based on the time required for the radio waves to be emitted and return
Implementation Method 2
The velocity calculation relies on the Doppler Effect. The radar system calculates the frequency difference between the emitted and received radio waves, and using this frequency difference and the frequency of the emitted wave, the velocity of the object can be calculated
Data Source
AI summary
A radar system includes multiple radio frequency (RF) circuits and a processing circuit. The RF circuits obtain multiple RF signals with respect to an object. The processing circuit is configured to measure a range and an angle of the object related to the radar system according to the RF signals, and calculates coordinates according to the range and the angle in each of multiple cycles. The processing circuit also obtains multiple combinations among the cycles, in which each combination corresponds to two cycles. For each combination, the processing circuit calculates velocities according to the corresponding coordinates and a cycle difference. The processing circuit also calculates at least one statistic value of the velocities of the combinations, and calculates a corrected velocity according to the statistic value.