Signal processor, radar device, and signal processing method for radar device
The two-stage coherent integration in the signal processor addresses false detection and accuracy issues in radar systems by improving target velocity and distance resolution, especially in low SNR conditions.
JP2026099041APending Publication Date: 2026-06-18MITSUBISHI ELECTRIC CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- MITSUBISHI ELECTRIC CORP
- Filing Date
- 2024-12-06
- Publication Date
- 2026-06-18
AI Technical Summary
Technical Problem
Existing radar systems face issues with false target detection and degraded accuracy in calculating target velocity and distance resolution, particularly when the signal-to-noise ratio is low or when multiple targets are present.
Method used
A signal processor with two-stage coherent integration units is employed to integrate distance and velocity components separately, using first and second coherent integration units to reduce integration loss and improve accuracy.
Benefits of technology
The solution effectively suppresses false detection and maintains target velocity and distance resolution accuracy even with low SNR, enhancing radar system performance.
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Smart Images
Figure 2026099041000001_ABST
Abstract
To obtain a signal processor that can suppress false detection of targets while suppressing the degradation of the accuracy of target velocity calculation and the distance resolution of targets. [Solution] The signal processor 30 provided in the radar device 1 includes a first coherent integration unit 31 that generates a first coherent integrated signal by integrating terms including distance and velocity components in the received video signal, and a second coherent integration unit 32 that generates a second coherent integrated signal by integrating the velocity term of the first coherent integrated signal. The detection unit 33 detects target candidates based on the second coherent integrated signal, the velocity calculation unit 34 calculates the velocity of the target candidates based on the second coherent integrated signal, and the distance calculation unit 35 calculates the frequency of the target candidates based on the first and second coherent integrated signals, and calculates the distance to the target candidates using the velocity and frequency of the target candidates.
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