A New Side-Looking Scheme for Speed Estimation and Detection of Tangential Slow-Moving Targets
Abstract
:1. Introduction
- A new side-looking radar scheme is proposed, which uses the change in frequency of the wave-path difference between the receiving channels to replace the Doppler frequency to estimate the velocity of the tangential moving target; the scheme can ensure the accuracy of the velocity measurement and reduce the processing complexity.
- A deconvolution-based clutter map algorithm is proposed to solve the problem of slow and weak targets being susceptible to clutter, and this algorithm can pre-learn the clutter environment to reduce the computation and running time in actual measurements.
- The theoretical performance and performance curve of the detector in the system are given, and the performance of the detector before and after clutter processing is simulated to verify the effectiveness of the proposed clutter processing algorithm.
- The scheme of this paper has no special requirements for radar equipment. Theoretically, the scheme can be deployed on any millimeter-wave radar equipment with multiple channels. In addition, this paper solves the problem that the phase difference is not obvious due to the small spacing of the receiving channels and verifies it on commercial millimeter-wave radar equipment.
2. Proposed Method
3. Target Detection
3.1. Detect Targets in Different Distance Units
3.2. Detect the Characteristic Signal of Tangential Moving Target
- In the case of a null hypothesis:
- In the case of an alternative hypothesis:
4. The Method of Dealing with Clutter
Algorithm 1 Clutter map algorithm based on deconvolution |
Input: transmit signal ; received signal ; iterative forgetting factor Output: signal after clutter removal
|
5. Experimental Results
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameter | Value |
---|---|
frequency (GHz) | 77 |
Pulse width (s) | 1/1,000,000 |
Pulse number | 1,000,000 |
Bandwidth (MHz) | 150 |
Range resolution (m) | 1 |
Velocity resolution(m/s) | 0.2 |
Target speed (m/s) | 1 |
Parameter | Value |
---|---|
Carrier frequency (GHz) | 77 |
Bandwidth (MHz) | 150 |
Sampling frequency | 10 |
Number of transmitted frames | 200 |
Number of cycles per frame | 128 |
Frame transmission period (s) | 0.07 |
Range resolution (m) | 1 |
Velocity resolution (m/s) | 0.5 |
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Qi, Z.; Huang, X.; He, L. A New Side-Looking Scheme for Speed Estimation and Detection of Tangential Slow-Moving Targets. Sensors 2022, 22, 4535. https://doi.org/10.3390/s22124535
Qi Z, Huang X, He L. A New Side-Looking Scheme for Speed Estimation and Detection of Tangential Slow-Moving Targets. Sensors. 2022; 22(12):4535. https://doi.org/10.3390/s22124535
Chicago/Turabian StyleQi, Ziyi, Xiaohong Huang, and Lanpu He. 2022. "A New Side-Looking Scheme for Speed Estimation and Detection of Tangential Slow-Moving Targets" Sensors 22, no. 12: 4535. https://doi.org/10.3390/s22124535
APA StyleQi, Z., Huang, X., & He, L. (2022). A New Side-Looking Scheme for Speed Estimation and Detection of Tangential Slow-Moving Targets. Sensors, 22(12), 4535. https://doi.org/10.3390/s22124535