基于功率中值和歸一化采樣協(xié)方差矩陣的自適應(yīng)匹配濾波檢測器

劉明; 水鵬朗

doi:10.11999/JEIT140900

基于功率中值和歸一化采樣協(xié)方差矩陣的自適應(yīng)匹配濾波檢測器

doi: 10.11999/JEIT140900

劉明¹,
水鵬朗¹

基金項目:

國家自然科學(xué)基金(61271295)資助課題

計量
- 文章訪問數(shù): 1777
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2014-07-09
- 修回日期: 2014-10-08
- 刊出日期: 2015-06-19

Adaptive Matched Filter Detector Based on Power Median and Normalized Sample Covariance Matrix

Liu Ming¹,
Shui Peng-lang¹

摘要

摘要: 在非均勻海雜波環(huán)境中，參考單元中的異常單元限制了采樣協(xié)方差矩陣(SCM)的估計性能，從而影響了傳統(tǒng)自適應(yīng)匹配濾波(AMF)檢測器的檢測性能。而考慮刪除異常單元的方法在參考單元數(shù)目有限時可能導(dǎo)致矩陣的奇異性。鑒于此，在保持參考單元數(shù)目不變條件下，該文設(shè)計一種基于功率中值與歸一化采樣協(xié)方差矩陣(MNSCM)的估計方法，并將其與匹配濾波器(MF)相結(jié)合，構(gòu)造一種新型的自適應(yīng)匹配濾波檢測器。與傳統(tǒng)的自適應(yīng)匹配濾波相比，該文設(shè)計的檢測器在實測和仿真海雜波數(shù)據(jù)條件下均具有明顯的性能優(yōu)勢。
- 目標(biāo)檢測 /
- 海雜波 /
- 自適應(yīng)匹配濾波器 /
- 采樣協(xié)方差矩陣 /
- 功率中值和歸一化采樣協(xié)方差矩陣
Abstract: In nonhomogeneous sea clutter, abnormal cells included reference cells constrain the performance of the Sample Covariance Matrix (SCM), and then influence the detection performance of the traditional Adaptive Matched Filter (AMF) detector, while censoring abnormal cells may cause singularity of the covariance matrix in the case of limited reference cells. Without changing number of the reference cells, this paper devises the median and normalized covariance matrix estimator and uses in the detection scheme of the AMF. Compared with the traditional AMF, the newly devised AMF obtains better performance in both measured and simulated clutter.
- Target detection /
- Sea clutter /
- Adaptive Matched Filter (AMF) /
- Sample Covariance Matrix (SCM) /
- Median and Normalized Sample Covariance Matrix (MNSCM)

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參考文獻(xiàn)(19)

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