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1、222t?0Fl: 2005- 09- 10; 2005- 12- 15bTe:( 1978- ) ,3,V,1Z_/a0dTr?s,X?VEbSARmTrT孙云辉1,李芳倩2,冯建伟3( 1. 65041部队,沈阳null 110113; 2.东北大学,沈阳null 110014 ; 3.北海舰队司令部,青岛null 266071)null nullK1: null SAR具有较强的抗干扰性能,欺骗式干扰是对抗SAR 的重要手段b欺骗式干扰的有效性主要取决于欺骗假目标的逼真程度,假目标越逼真, ATR 系统就越难以将其从真实目标中识别出来,欺骗干扰效果也就越好b在此基础上,提出了一种基于SA
2、R图像的欺骗式干扰效果评估系统,该系统可以对欺骗假目标的模拟逼真程度进行定量评估b1oM: null SAR;欺骗式干扰;效果评估ms|: null TN972+ . 3; TN974; TN958 null nullDSM: null AEffect evaluation for deception jamming based on SAR imageSun Yunhui1, Li Fangqian2 , Feng Jianwei3(65041 unit of PLA, Shenyang 110113, China; Northeast university, Shenyang 110014
3、,China; North sea fleet command, Qingdao 266071, China)Abstract:SAR has the great capability of ECCM, and the deception jamming is an important measure a-gainst SAR. The fidelity of decoy targets determines the validity of deception jamming. T he more lifelike thedecoy targets are,the more difficult
4、 the ATR system recognise them from true targets, so the result of decep-tion jamming is better.T herefore an effect evaluation system for the deception jamming is proposed based onSAR images,which can quantificationally evaluate the fidelity of the decoy targets.Keywords:SAR; deception jamming;effe
5、ct evaluation1nullSARMr, null,m2Ub图2null 虚警概率与检测概率的表示q:pf a =nullnullK CFAR q(z) dz (1)SARmlu|S,S),|2Mnull2N3gbm3U,n53g=9od9,_?53gg( i, j )b),M2M null 2N3g6B,),Nm)b图 3null CFAR 检测算法框图/p_?5d9bn5po9(Tkg( i, j )9(,YV3god9Fp(,:nullc = (2M null2N - 4)- 1 nullM 1k= M g(i- k, j)+ g(i+ k, j) +nullN 2k= N+ 1
6、 g(i, j- k)+ g(i, j+ k) (2)po9Znullc,Tkg(i, j)9Z,:nullc = (2M null2N - 4)- 1 null322006(2):SARmTrTnullM 1k= M g(i- k,j )+ g(i+ k, j)- nullc 2+nullN 2k= N+ 1 g(i, j- k)+ g(i,j+ k)- nullc 2 (3)B- CFAREV:g(i, j)- nullcnullc nullK CFAR (4)T, g(i, j )k, nullcku9(,nullcku9Z, K CFARq9bkTT( 4)H,k=S,iTPHTk;5
7、kobkjvl1sOquS7Mbku,H9o(#S,uiPSiiYo9bVCFAR_mis1/S,NH,V!BK,CFARm=)bKVYVd9SudSu7bVK)CFARmBr1/So,_rT,H9S4|=mb+YS1oAuY,yNVCFAR_#K)SARmhvs1o,iOSARmSb2.2nullS| 4, 6S_CFARmS,1oo,7S+4|SaZ_M1u=b4|S+, CFAR_mAVS4|,SaZ_bV+4|1?,S4|)bBS5MyBSvl,mV_Z_,c?Kv,5Z_VSZ_bS?11o,SZ_H,TbW=robKZ_1+4|b=Pm)/,=SKa)aH_,sSubuS+aZ_sS,1S+4|b2.3null+4|S+1?QS+,T1E3L+YS,yN+YS+sb+YS(yafaX)+1V(Mr|o7),r?Q,irmbBsOqSARsOVSS+sB,+YSVSARm+ 7 ,yN|+1bS+1sSs?p,QS4+,Vaqaoa+ 8- 9 ,9S4|)Su=b(1)( Form factor) Fuu9,:F= P2 /(4nullA ) (5)T, PS, ASbBuX,uMb(2)qq(Eccentricity) E9$%,BuXbE9T,BeZE9u()1,V9s8.2Y1vbzZEu
