Two-Torpedo Salvo Active Homing Method Based on Fractional Fourier Transform
-
摘要: 针对双雷齐射中可能产生的两雷相互干扰问题, 文中提出了一种基于分数阶傅里叶变换的双雷齐射主动自导方法。两雷通过分别发射不同调频斜率的线性调频(LFM)信号, 并利用分数阶傅里叶变换对LFM信号的聚焦特性, 以实现双雷回波信号的分离检测。在此基础上, 提出了双雷齐射目标检测的总体方案, 并进一步分析了影响目标参数估计结果的主要因素。不同信噪比条件下的仿真试验结果表明, 利用分数阶傅里叶变换可有效实现双雷齐射目标检测, 具有较强的抗干扰能力, 且双雷基本可工作于同一频段, 无需分频段使用。该方法可对双雷齐射条件下的主动自导提供参考。Abstract: A two-torpedo salvo can effectively improve hit probability, but it may cause mutual interference problems. Therefore, a two-torpedo salvo active homing method based on fractional Fourier transform is proposed in this study. The echo signals of two torpedoes can be separated and detected by transmitting linear frequency modulation (LFM) signals at different chirp rates and by applying the focus characteristics of the fractional Fourier transform to those LFM signals. Accordingly, a general scheme for two-torpedo salvo target detection is proposed, and the main factors that affect the target parameter estimation results are further analyzed. Simulation results under different signal-to-noise ratios show that using fractional Fourier transform can effectively realize target detection of a two-torpedo salvo and has strong anti-interference capabilities. In addition, two torpedoes can work in the same frequency band without frequency division, thus making the method feasible for use in two-torpedo salvo active homing.
-
Key words:
- torpedo /
- two-torpedo salvo /
- fractional Fourier transform /
- active homing /
- target detection
-
[1] 周德善. 鱼雷自导技术[M]. 北京: 国防工业出版社. 2009. [2] 姜凯峰, 周明, 葛津华. 舰载反鱼雷鱼雷齐射作战能力研究[J]. 舰船科学技术, 2010, 32(11): 64-68.Jiang Kai-feng, Zhou Ming, Ge Jin-hua. Research on Operational Capability of Shipboard Anti-torpedo Torpedo[J]. Ship Science and Technology, 2010, 32(11): 64-68. [3] 刘影, 周明, 高勇. 声自导鱼雷互扰问题初探[J]. 舰船科学技术, 2006, 28(4): 58-60.Liu Ying, Zhou Ming, Gao Yong. On Mutual Conductance of Acoustic Torpedo[J]. Ship Science and Technology, 2006, 28(4): 58-60. [4] 张静远, 王鹏. 声自导鱼雷双雷齐射有关技术与战术问题分析[J]. 鱼雷技术, 2013, 21(4): 299-305.Zhang Jing-yuan, Wang Peng. Technical and Tactical Analysis of Two-Torpedo Salvo for Acoustic Homing Torpedo[J]. Torpedo Technology, 2013, 21(4): 299-305. [5] Wiener N. Hermitian Polynomials and Fourier Analysis[J]. Journal of Mathematics Physics MIT, 1929, 18: 70-73. [6] Almeida L B. The Fractional Fourier Transform and Time-frequency Representations[J]. IEEE Trans. Signal Processing, 1994, 42(11): 3084-3091. [7] Ozaktas H M, Arikan, Kutay M A, el al. Digital Computa-tion of the Fractional Fourier Transform[J]. IEEE Trans. Signal Processing, 1996, 44(9): 2141-2150. [8] Ozaktas H M. The Fractional Fourier Transform with Application in Optics and Signal Processing[M]. New York: John Wiley & Sons, 2001: 117-183. [9] Chen Y L, Guo L H, Gong Z X. The Concise Fractional Fourier Transform and Its Application in Detection and Parameter Estimation of the Linear Frequency-modulated Signal[J]. Chinese Journal of Acoustics, 2017(1): 70-86. [10] 陶然, 邓兵, 王越. 分数阶傅里叶变换及其应用[M]. 北京: 清华大学出版社, 2009. [11] 谢砚同, 彭圆, 张风珍. 基于分数阶傅里叶变换的水下目标速度估计[J]. 数字海洋与水下攻防, 2018, 1(3): 75-80.Xie Yan-tong, Peng Yuan, Zhang Feng-zhen. Underwater Target Velocity Estimation Based on Fractional Fourier Transform[J]. Digital Ocean & Underwater Warfare, 2018, 1(3): 75-80. [12] 赵兴浩, 邓兵, 陶然. 分数阶傅里叶变换数值计算中的量纲归一化[J]. 北京理工大学学报, 2005, 25(4): 360-364.Zhao Xing-hao, Deng Bing, Tao Ran. Dimensional Nor-malization in the Digital Computation of the Fractional Fourier Transform[J]. Transactions of Beijing Institute of Technology, 2005, 25(4): 360-364. [13] Yan M, Yan K. FRFT Based on Joint Estimation Time Delay and Radial Velocity of Underwater Target[C]//2010 3th International Congress on Image and Signal Pro-cessing, Yantai: CISP, 2010. [14] 马艳, 罗美玲. 基于分数阶傅里叶变换水下目标距离及速度的联合估计[J]. 兵工学报, 2011, 32(8): 1030-1035.Ma Yan, Luo Mei-ling. FRFT-based Joint Range and Radial Velocity Estimation of Underwater Target[J]. Acta Armamentarii, 2011, 32(8): 1030-1035.
点击查看大图
计量
- 文章访问数: 151
- HTML全文浏览量: 3
- PDF下载量: 92
- 被引次数: 0