一種新的最大選擇恒虛警檢測器
A NEW CFAR DETECTOR WITH GREATEST OPTION
-
摘要: 本文提出一種基于有序統(tǒng)計(OS)和單元平均(CA)產(chǎn)生局部估計,并應(yīng)用最大選擇(GO)產(chǎn)生檢測單元雜波功率水平估計Z的新的恒虛警檢測器(OSCAGO)。我們推導(dǎo)出了該檢測器在Swerling Ⅱ型目標假設(shè)下的虛警概率(Pfa)、檢測概率(Pd)和度量平均判決門限(ADT)解析表達式。分析了它在均勻背景和強干擾環(huán)境中的檢測性能。并且把它與OS-,GOSGO-CFAR進行了比較。結(jié)果表明,OSCAGO在均勻雜波背景和多目標情況下的檢測性能與OS和GOSGO相比,都有很明顯的提高。在干擾目標數(shù)為某些值時,OSCAGO的CFAR損失比GOSGO小近3dB。
-
關(guān)鍵詞:
- 雷達; 檢測; 恒虛警率; 信號處理
Abstract: This paper presents a new Constant-False-Alarm Ratio(CFAR) detector based on Ordered Statistics(OS) and Cell-Averaging(CA) forming local estimates, and using Greatest-Option (GO) to form interference power level estimate Z in test cell (OSCAGO). Under the Swerling II assumption, the analytic expressions of false-alarm probability (Pfa), detection probability (Pd) and Average Decision Threshold (ADT) of this detector are derived, its detection performances in homogeneous background and in strong interfering targets environment are analyzed, and compared with that of OS-, GOSGO-CFARs. Results show that the detection performances of OSCAGO in homogeneous background and in multiple-target situations are all obviously better than those of OS and GOSGO. When the number of interfering targets is equal to certain value, the CFAR loss of OSCAGO is about 3dB less than that of GOSGO. -
Finn H M, Johnson R S. RCA Rev., 1968, 29(9): 414-464.[2]Hansen V G. Constant False Alarm Rate Processing in Search R.adars. IEEE International Radar Conference, LONDON: 1973, 325-332.[3]Trunk G V. IEEE Trans. on AES, 1978, AES-14(5): 750-755.[4]Al-Hussaini E K, Ibrahim B M. IEE Proc.-F 1986, 133(3): 217-223.[5]Richard J T, Dillard G M. IEEE Trans, on AES, 1977, AES-13(4): 338-343.[6]Rohling H. IEEE Trans. on AES, 1983, AES-19(4): 608-621.[7]Elias A R, de Mercado M G, Davo E R. IEEE Trans. on AES, 1990, AES-26(1): 197-202.[8]何友,Rohling H.電子科學(xué)學(xué)刊,1994, 16(6): 582-590.[9]He Y. IEE Proc.-F 1994, 141(4): 205-212. -
計量
- 文章訪問數(shù): 2321
- HTML全文瀏覽量: 129
- PDF下載量: 351
- 被引次數(shù): 0
下載:
