When the random pulse repetition interval (RPRI) compressed sensing radar suffers from the jamming of active velocity false target,the sparsity of target echoes will be destroyed and the RPRI compressed sensing radar's superiority on target detection and velocity measurement will be limited.In practice,due to the random modulation,the jammers can hardly update precise parameters such as the random PRI in time,which will induce the echo signals of true and false target to be sparse in different dictionaries.By utilizing this factor,a velocity false target identification algorithm is proposed within the frame of compressed sensing.The echo signals of true and false target can be sparsely presented and separated by building a joint dictionary.Also,to present application limitation of the algorithm,the autocorrelation of the joint dictionary under different RPRI signal's random mode is analyzed as well as its influence on the separation results.Computer simulation verifies the effectiveness and superiority of the algorithm.
[1] Kaveh M,Cooper G R.Average ambiguity function for a randomly staggered pulse sequence[J].IEEE Transactions on Aerospace and Electronic Systems,1976,AES-12:410-413.
[2] 朱晓华.脉位调制脉冲串雷达信号理论与应用研究[D].江苏南京:南京理工大学,2002.11. Zhu Xiaohua.Study on pulse-position-modulated pulse-sequence radar signal theory and its applications[D].Nanjing,Jiangsu:Nanjing University of Science and Technology,2002.11.(in Chinese)
[3] 刘振,等.一种新的随机PRI脉冲多普勒雷达无模糊MTD算法[J].雷达学报,2012,1(1):28-35. Liu Zhen,et al.Novel method of unambiguous moving target detection in pulse-Doppler radar with random pulse repetition interval[J].Journal of Radars,2012,1(1):28-35.(in Chinese)
[4] Donoho D.Compressed sensing[J].IEEE Transactions on Information Theory,2006,52(4):1289-1306.
[5] Patel V M,Easley G R,et al.Compressed synthetic aperture radar[J].IEEE Journal of Selected Topics in Signal Processing,2010,4(2):244-254.
[6] Quan Y H,Zhang,et al.Velocity ambiguity resolving for moving target indication by compressed sensing[J].Electronics Letters,2011,47(22):1249-1251.
[7] 刘振.基于压缩感知的随机调制雷达信号处理方法与应用研究[D].湖南长沙:国防科学技术大学,2013.4. Liu Zhen.Methods and applications of random modulated radar signal processing based on compressed sensing[D].Changsha,Hunan:National University of Defense Technology,2013.4.(in Chinese)
[8] 卢刚.雷达有源假目标抑制方法研究[D].四川成都:电子科技大学,2012.6. Lu Gang.Study of algorithms on suppression of radar active false targets[D].Chengdu,Sichuan:University of Electronic Science & Technology of China,2012.6.(in Chinese)
[9] Pace P E,Fouts D J,et al.Digital false-target image synthesizer for countering ISAR[J].IEE Proc Radar Sonar Navigation,2002,149(5):248-257.
[10] Zhang J D,Zhu D Y.New antivelocity deception jamming technique using pulses with adaptive initial phases[J].IEEE Transactions on Aerospace and Electronic Systems,2013,49(2):1290-1300.
[11] Soumek M.SAR-ECCM using phase-perturbed LFM chirp signalsand DRFM repeat jammer penalization[J].IEEE Transactions on Aerospace and Electronic Systems,2006,42(1):191-205.
[12] AKHTAR J.Orthogonal block boded ECCM schemes against repeat radar jammers[J].IEEE Transactions on Aerospace and Electronic Systems,2009,45(3):1218-1226.
[13] AKHTAR J.An ECCM scheme for orthogonal independent range-focusing of real and false targets[A].IEEE Radar Conference[C].IEEE,2007.846-849.
[14] Zhen Liu,Xizhang Wei,Xiang Li.Aliasing-free moving target detection in random pulse repetition interval radar based on compressed sensing[J].IEEE Sensors Journal,2013,13(7):2523-2534.
2017, Vol. 45 
