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Maximum a posteriori–based angular superresolution for scanning radar imaging
- Source :
- IEEE Transactions on Aerospace and Electronic Systems. 50:2389-2398
- Publication Year :
- 2014
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2014.
-
Abstract
- Because a scanning radar system works as a noncoherent sensor, it is suitable for any geometry situation, and it has significant and extensive applications, such as surveillance, autonomous landing of aircraft, navigation, and guidance. After the pulse compression technique of improving range resolution was presented, angular resolution became crucial for a scanning radar system. In this paper, a scheme of angular superresolution based on maximum a posteriori (MAP) framework is proposed. First, the received signal in azimuth is modeled as a mathematical convolution of the antenna pattern and the targets' scattering. Then, the principle of the angular superresolution algorithm, superresolution performance analysis, and computational implementation are presented. The algorithm can endure more significant disturbance of noise than conventional approaches. Simulation validates that the method can improve the radar angular resolution at least four times, even when the signal-to-noise ratio (SNR) is 10 dB. Furthermore, real data processing has proved the effectiveness of the proposed method.
- Subjects :
- business.industry
Computer science
Pulse-Doppler radar
Scattering
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Aerospace Engineering
Side looking airborne radar
Superresolution
Radiation pattern
law.invention
Inverse synthetic aperture radar
Continuous-wave radar
Radar engineering details
Pulse compression
law
Radar imaging
Angular resolution
Computer vision
Artificial intelligence
Electrical and Electronic Engineering
Radar
business
Subjects
Details
- ISSN :
- 00189251
- Volume :
- 50
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Aerospace and Electronic Systems
- Accession number :
- edsair.doi...........a69c0611948fbf2c22d2f071c6bd17fe