一種航跡恒虛警的目標(biāo)檢測(cè)跟蹤一體化算法
doi: 10.11999/JEIT150638
基金項(xiàng)目:
國(guó)家自然科學(xué)基金(61401329, 61271291, 61201285)，國(guó)家杰出青年科學(xué)基金(61525105)，中國(guó)博士后科學(xué)基金(2015M 580817)
An Integrated Target Detection and Tracking Algorithm with Constant Track False Alarm Rate
Funds:
The National Natural Science Foundation of China (61401329, 61271291, 61201285), The National Science Fund for Distinguished Young Scholars (61525105), The Postdoctoral Science Foundation of China (2015M580817)
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摘要: 對(duì)于傳統(tǒng)雷達(dá)系統(tǒng)，目標(biāo)檢測(cè)和目標(biāo)跟蹤通常被看作是兩個(gè)獨(dú)立的過(guò)程。然而，在跟蹤階段，可以獲得目標(biāo)位置信息(跟蹤信息)，將該信息反饋至目標(biāo)檢測(cè)器將有助于提升檢測(cè)性能。為此，該文提出一種航跡恒虛警的目標(biāo)檢測(cè)跟蹤一體化算法。首先根據(jù)目標(biāo)跟蹤信息和目標(biāo)運(yùn)動(dòng)模型，建立預(yù)測(cè)波門；然后按照給定的航跡虛警概率，計(jì)算幀虛警概率，即預(yù)測(cè)波門內(nèi)至少出現(xiàn)一個(gè)虛警的概率；最終根據(jù)幀虛警概率調(diào)整預(yù)測(cè)波門內(nèi)的檢測(cè)門限，完成目標(biāo)檢測(cè)過(guò)程。仿真實(shí)驗(yàn)表明，該算法可以大大提高目標(biāo)檢測(cè)概率，推遠(yuǎn)目標(biāo)跟蹤距離，同時(shí)也可以保證目標(biāo)突然消失時(shí)航跡能夠以較高的概率結(jié)束。
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關(guān)鍵詞:
- 目標(biāo)檢測(cè) /
- 目標(biāo)跟蹤 /
- 跟蹤信息 /
- 航跡恒虛警
Abstract: For traditional radar systems, target detection and target tracking are usually conducted separately. However, at the tracking stage, the target location information (tracking information) can be obtained, which can be fed back to the target detector to improve detection performance. Therefore, in this paper, an integrated detection and tracking algorithm with constant track false alarm rate is proposed. Firstly, a predicted gate is established according to the tracking information and target dynamic model. Then according to a prescribed track false alarm rate, the frame false alarm rate, i.e., the probability that there exists at least one false alarm in the predicted region, is calculated. Finally, detection thresholds in the predicted region are adjusted according to the frame false alarm rate, and target detection process is accomplished. Simulation results indicate that the proposed algorithm can significantly improve target detection probability and extend the tracking distance, and meanwhile it can guarantee that the target track can be terminated with a high probability when the target disappears suddenly. -
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