脉冲重复间隔（PRI）变换及其改进算法是雷达信号分选领域的经典算法。随着信号环境的日益复杂，不同调制的多种雷达信号，具有交叠严重，PRI分布范围广的特点，加上脉冲抖动现象严重，使传统算法的分选能力大大减弱，甚至会出现分选出错现象。针对上述问题，对改进的传统算法进一步改进，提出一种新的变换分选算法，新方法利用脉冲的脉内特征进行脉冲预分离，大大降低了信号的复杂程度，能够适应PRI值分布在较大范围内的抖动雷达信号分选问题，并通过模拟仿真验证新算法的有效性。
Pulse repetition interval (PRI) transform and its improved algorithms are the classical algorithms in radar signal sorting area. With the signal environment getting more and more complex, radar signals with different modulation overlap seriously and the PRI distribute in wide ranges. In addition the pulse jitter is serious, the traditional method of sorting capability has been greatly reduced and even it will be sorted wrong. In response to these problems, further improvement should be applied in traditional improve algorithms. We propose a new sorting method which use the intra-pulse characteristics to separate pluses beforehand, which greatly reduces the complexity of the signal. It is possible to adapt the jitter problems and wide range PRI values questions in radar signal sorting and verified the validity of the new algorithm by computer simulation.
2017,39(10): 132-136 收稿日期：2016-09-01
DOI：10.3404/j.issn.1672-7649.2017.10.026
分类号：TN951
作者简介：乐明军(1991-),男,硕士研究生,研究方向为信号处理理论与技术
参考文献：
[1] 何明浩. 雷达对抗信息处理[M]. 北京:清华大学出版社, 2010. HE Ming-hao. Radar countermeasure information processing[M]. Beijing Tsing Hua University Press, 2010.
[2] 乔宏乐, 王超, 王鹏. 基于PRI变换法的脉冲信号分选算法[J]. 火控雷达技术, 2012(2):34-38. QIAO Hong-le, WANG Chao, WANG Peng. Pulse signals de-interleaving algorithm based on PRI transform[J]. Fire Control Radar Technology, 2012(2):34-38.
[3] MARDIA H K. New techniques for the deinterleaving of repetitive sequences[J]. Radar & Signal Processing Iee Proceedings F, 1989, 136(4):149-154.
[4] MILOJEVIĆ D J, POPOVIĆ B M. Improved algorithm for the deinterleaving of radar pulses[J]. Radar & Signal Processing Iee Proceedings F, 1992, 139(1):98-104.
[5] MAHDAVI A, PEZESHK A M. A fast enhanced algorithm of PRI transform[C]//International Symposium on Parallel Computing in Electrical Engineering. 2011:179-184.
[6] 魏东升, 巫胜洪. 雷达信号脉内细微特征的研究[J]. 舰船科学技术, 1994(3):23-30. WEI Dong-sheng, WU Sheng-hong. Study on the subtle characteristics of radar signal[J]. Ship Science and Technology, 1994(3):23-30.
[7] 陈韬伟. 基于脉内特征的雷达辐射源信号分选技术研究[D]. 成都: 西南交通大学, 2010. CHEN Tao-wei. Deinterleaving technology for radar emitter signals based on the intra-pulse features[D]. Chengdou:Southwest Jiaotong University, 2010.
[8] 贾立印, 张洪顺. LFM脉冲压缩雷达信号的时频分析及其应用[C]//全国无线电应用与管理学术会议. 2008. JIA Li-yin, ZHANG Hong-shun. Time-frequency analysis of LFM pulse compression radar signal and appliance[C]//National Conference on Radio Application and Management, 2008.
