Radar Device Equal Frequency Band Division
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Solution Overview
Problem
Conventional radar devices struggle to accurately measure a range to a target when unavailable frequency bands are interspersed, leading to numerous unnecessary peaks at ranges other than the target due to unequal transmission frequency intervals.
Innovation Solution
The radar device divides multiple frequency bands such that the differences between center frequencies are equal, transmitting signals in a time division manner and rearranging reception video signals to perform band synthesis, allowing for accurate range measurement even with interspersed unavailable frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission frequencies are changed at equal intervals, then range measurement accuracy is improved, but adaptability to unavailable frequency bands deteriorates
Solution Approach 1:
The frequency spectrum is divided into multiple frequency bands, each processed separately with equal interval requirements. This segmentation allows the system to handle unavailable bands by treating each band independently while maintaining overall equal interval structure for accurate range measurement.
Solution Approach 2:
The system changes the parameter of frequency interval equality from a global constraint to a local constraint within each frequency band. By allowing different bands to have different frequency assignments while maintaining equal intervals within each band, the system adapts to unavailable bands without sacrificing measurement accuracy.
2Adaptability or versatility
If unavailable frequency bands are interspersed, then frequency band utilization flexibility is improved, but range measurement accuracy deteriorates due to unequal transmission frequency intervals
Solution Approach 1:
By segmenting the frequency spectrum into multiple bands and processing them separately, the system can skip unavailable bands while maintaining equal interval relationships within each available band. This segmentation prevents the interspersed unavailable bands from disrupting the overall equal interval structure required for accurate range measurement.
Solution Approach 2:
Instead of trying to maintain equal intervals across the entire frequency spectrum including unavailable bands, the system inverts the approach by establishing equal intervals only within each available frequency band. This inversion allows flexible utilization of available bands while preserving measurement accuracy.
3Adaptability or versatility
If transmission frequency intervals are set to unequal intervals to accommodate unavailable bands, then adaptability to frequency band constraints is improved, but occurrence of unnecessary peaks increases
Solution Approach 1:
Segmenting the frequency processing into separate bands allows the system to maintain equal interval relationships within each band even when bands are interspersed with unavailable frequencies. This segmentation prevents the generation of unnecessary peaks by preserving the equal interval structure required for clean range measurement.
Solution Approach 2:
The system changes the frequency interval parameter from a single global value to multiple local values, each maintaining equality within its respective band. This parameter change allows adaptation to unavailable bands while preventing unnecessary peaks through maintained local equal interval relationships.
Data Source
Figure 1
Figure 2~5
Figure 6A~6B
AI summary
A transmission radar (1) divides each of multiple frequency bands in such a manner that differences between center frequencies in respective frequency bands after the division are equal, and transmits, in time division manner, transmission signals of which transmission frequencies are the center frequencies in respective frequency bands after the division; a rearrangement processing unit (13) rearranges each of the reception video signals converted by the reception radar (5) in such a manner that sets of reception video signals corresponding to the multiple frequency bands before being divided by the transmission radar (1) are arranged in a row; and a band synthesis processing unit (14) performs a band synthesis on each of the reception video signals rearranged by the rearrangement processing unit (13).