Meshless Search SR-STAP for Airborne Radar Based on Meta-Heuristic Algorithms
Abstract
:1. Introduction
2. Background and Basic Method
2.1. Signal Model
2.2. Basic MH-STAP Method
2.2.1. MH-STAP Algorithm Flow
- (1)
- Initialization: k = 0, , , .
- (2)
- Optimization: obtain the optimal space-time steering vector under the current iteration by using meta-heuristic algorithms.
- (3)
- Update: k = k + 1, , , .
- (4)
- Judgment: When the criterion is satisfied, jump out of the loop.
2.2.2. Performance Comparison
3. Improved PSO-GWO-STAP
3.1. Improved Fitness Function
3.2. PSO and GWO Algorithms
3.3. The Process of the Proposed Method
3.4. The Performance of the Proposed Method
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Abbreviations
Full Name | Acronym |
Clutter covariance matrix | CCM |
Coherent processing interval | CPI |
Differential evolution | DE |
Direction of arrival | DOA |
Deep unfolding | DU |
Evolutionary computation | EC |
Genetic algorithm | GA |
Grey wolf optimization | GWO |
Improvement factor | IF |
Improved fitness function | IFF |
Local mesh splitting subspace estimation | LMSSE |
Meta-heuristic algorithms | MH |
Moving target indication | MTI |
Particle swarm optimization | PSO |
Reduced-dimension local search clutter subspace estimation | RD-LSCSE |
Sample covariance matrix | SCM |
Swarm intelligence | SI |
Sparse recovery | SR |
Space-time adaptive processing | STAP |
Uniform planar array | UPA |
Wireless sensor networks | WSNs |
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Parameter | Symbol | Value |
---|---|---|
Platform height | H | 8000 m |
Signal wavelength | λ | 0.23 m |
Array spacing | d | 0.115 m |
Pulse repeat frequency | fr | 2434.8 Hz |
Flight velocity | V | 140 m/s |
Element number in UPA | M × N | 8 × 8 |
Pulse number in CPI | K | 8 |
Clutter-to-noise ratio | CNR | 60 dB |
Non-side-looking angle | θp | 15° |
STAP Algorithm | LMSSE | PSO | GWO | GA | DE |
---|---|---|---|---|---|
Average runtime(s) | 1.53 | 1.93 | 1.97 | 2.14 | 7.64 |
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Hou, Y.; Zhang, Y.; Gui, W.; Wang, D.; Dong, W. Meshless Search SR-STAP for Airborne Radar Based on Meta-Heuristic Algorithms. Sensors 2023, 23, 9444. https://doi.org/10.3390/s23239444
Hou Y, Zhang Y, Gui W, Wang D, Dong W. Meshless Search SR-STAP for Airborne Radar Based on Meta-Heuristic Algorithms. Sensors. 2023; 23(23):9444. https://doi.org/10.3390/s23239444
Chicago/Turabian StyleHou, Yunfei, Yingnan Zhang, Wenzhu Gui, Di Wang, and Wei Dong. 2023. "Meshless Search SR-STAP for Airborne Radar Based on Meta-Heuristic Algorithms" Sensors 23, no. 23: 9444. https://doi.org/10.3390/s23239444