一種基于跟蹤信息的多基雷達(dá)系統(tǒng)航跡起始算法
doi: 10.11999/JEIT150148
基金項目:
國家自然科學(xué)基金(61401329, 61271024, 60901065)
A Track Initiation Algorithm for Multisite Radar Systems Based on Tracking Information
Funds:
The National Natural Science Foundation of China (61401329, 61271024, 60901065)
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摘要: 多基雷達(dá)系統(tǒng)(MSRS)可以大大提高目標(biāo)定位性能，然而由于各個雷達(dá)站信噪比的差異，通常存在一些雷達(dá)站尚未建立目標(biāo)航跡，從而不能最大程度地提高目標(biāo)定位精度。因此，如何利用其它雷達(dá)站提供的目標(biāo)跟蹤信息，提高尚未建立目標(biāo)航跡的雷達(dá)站的探測性能是一個值得研究的問題。為此，該文提出一種基于跟蹤信息的航跡起始算法。首先將已經(jīng)跟蹤到目標(biāo)的雷達(dá)站提供的目標(biāo)跟蹤信息，送至尚未建立目標(biāo)航跡的雷達(dá)站；然后利用目標(biāo)跟蹤信息和目標(biāo)運(yùn)動模型，建立目標(biāo)預(yù)測波門；最終在虛假航跡起始概率恒定的條件下，調(diào)整預(yù)測波門內(nèi)的檢測門限，完成目標(biāo)檢測和航跡起始過程。仿真實驗表明，該算法可以大大提高目標(biāo)檢測概率和目標(biāo)航跡起始概率。Abstract: MultiSite Radar Systems (MSRS) can significantly improve target localization performance. However, due to the difference of signal-to-noise ratios of separate radar sites, there usually exist some radar sites that have not initiated a target track, hence target localization accuracy can not be improved to the best. So an interesting problem is how to use target tracking information provided by other radar sites to improve the detection performance of the radar sites that have not initiated the target track. In this paper, a track initiation algorithm based on tracking information is proposed. Firstly, the target tracking information provided by the radar sites that have already tracked a target is transmitted to the radar sites that have not initiated the target track. Then, a predicted gate is established according to the tracking information and target dynamic model. Finally detection thresholds in the predicted gate are adjusted under a constant probability of false track initiation, and target detection and track initiation are accomplished. Numerical results indicate that the proposed algorithm can significantly improve the probability of target detection and target track initiation.
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Key words:
- Radar /
- Track initiation /
- Tracking information /
- Predicted gate /
- Probability of false track initiation
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