Track-Before-Detect Strategies for Radar Detection in G0-Distributed Clutter
| Autor: | Wei Yi, Thia Kirubarajan, Xiaobo Yang, Lingjiang Kong, Jiang Haichao |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Radar cross-section
Computer science Aerospace Engineering 02 engineering and technology Moving target indication Track-before-detect Constant false alarm rate Radar engineering details 0203 mechanical engineering 0202 electrical engineering electronic engineering information engineering Computer vision Electrical and Electronic Engineering Envelope (radar) Radar horizon Low probability of intercept radar 020301 aerospace & aeronautics Radar tracker business.industry Pulse-Doppler radar 020206 networking & telecommunications Radar lock-on Continuous-wave radar Bistatic radar Stationary target indication Chi-squared target models Clutter Artificial intelligence business Algorithm |
| Zdroj: | IEEE Transactions on Aerospace and Electronic Systems. 53:2516-2533 |
| ISSN: | 0018-9251 |
| DOI: | 10.1109/taes.2017.2702259 |
| Popis: | This paper considers target detection via dynamic-programming based track-before-detect (DP-TBD) for radar systems. The clutter is modeled usingenlr G0 distribution, which is usually used to model clutter received from high-resolution radars and radars working at small grazing angles. Two target models, namely, Swerling 0 and 1 models, are considered to capture the radar cross section changes over time. DP-TBD techniques that integrate amplitude suffer from significant performance loss in this case due to the high likelihood of target-like outliers. In this paper, the log-likelihood ratio (LLR) is used in the integration process of DP-TBD, taking the place of amplitude, to enhance radar detection performance. The expressions for the LLR for the above target models are derived first. However, neither of them has a closed-form solution. In order to reduce the complexity of evaluating the LLR, efficient but accurate approximation methods are proposed. Then the approximated LLR is used in the integration process of DP-TBD. Simulations are used to examine the efficiency of the approximation methods as well as the performances of different DP-TBD strategies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|