多基地雷達(dá)中雙門限CFAR檢測(cè)算法

胡勤振; 蘇洪濤; 周生華; 劉子威

doi:10.11999/JEIT151163

多基地雷達(dá)中雙門限CFAR檢測(cè)算法

doi: 10.11999/JEIT151163

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61372134, 61401329)

計(jì)量
- 文章訪問數(shù): 1744
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2015-10-21
- 修回日期: 2016-07-08
- 刊出日期: 2016-10-19

Double Threshold CFAR Detection for Multisite Radar

Funds:

The National Natural Science Foundation of China (61372134, 61401329)

摘要

摘要: 針對(duì)多基地雷達(dá)系統(tǒng)，該文為解決傳統(tǒng)集中式檢測(cè)算法數(shù)據(jù)傳輸率大的問題，根據(jù)廣義似然比檢測(cè)算法和自適應(yīng)匹配濾波算法，提出兩種雙門限恒虛警率檢測(cè)器：雙門限廣義似然比檢測(cè)器和雙門限自適應(yīng)匹配濾波檢測(cè)器。首先各個(gè)局部雷達(dá)站將超過第1門限的局部檢驗(yàn)統(tǒng)計(jì)量傳送到融合中心。然后融合中心根據(jù)局部雷達(dá)站傳送的數(shù)據(jù)計(jì)算融合后的全局檢驗(yàn)統(tǒng)計(jì)量，并與第2門限比較，得到最終的判決結(jié)果。在各空間分集通道的信雜噪比假設(shè)相同的條件下，給出了雙門限自適應(yīng)匹配濾波檢測(cè)器的虛警概率和檢測(cè)概率的解析表達(dá)式。仿真結(jié)果表明，兩種雙門限檢測(cè)器在低數(shù)據(jù)率傳輸時(shí)能夠保持較好的檢測(cè)性能。
- 雷達(dá) /
- 雙門限檢測(cè) /
- 恒虛警率檢測(cè) /
- 廣義似然比檢測(cè) /
- 自適應(yīng)匹配濾波
Abstract: For multisite radar system, to solve the data transmission rate problem, two kinds of Double Threshold Constant False Alarm Rate (DT-CFAR) detectors, the DT Generalized Likelihood Ratio Test (DT-GLRT) detector and the DT Adaptive Matched Filter (DT-AMF) detector, are proposed based on the GLRT and the AMF algorithms. Fisrt, the local test statistics which exceed the first threshold are transferred to the fusion center. Then, the global test statistic is obtained from the local test statistics and the final decision is made compared to the second threshold in the fusion center. The closed form expression for probabilities of false alarm and detection of the DT-AMF detector are also given when the Signal to Clutter plus Noise Ratios (SCNRs) are identical in the spatial diversity channels. Simulation results illustrate that the DT-CFAR detectors can maintain a good performance with a low communication rate.
- Radar /
- Double hreshold detection /
- Constant False Alarm Rate (CFAR) /
- Generalized Likelihood Ratio Test (GLRT) /
- Adaptive Matched Filter (AMF)

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