Fast Algorithm and Test of Underwater High-Speed Moving Target Based on Positive and Negative HFM Signals
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摘要: 针对水下高速小目标的特点, 提出了基于宽带正反双曲调频( HFM )信号的水下高速小目标检测与参数估计快速算法, 并完成了仿真。通过在信号发射端加入时间伸缩因子来模拟目标运动, 实现了水下高速小目标检测与参数估计的动态试验。并采集了雷体的反射回波数据。设计的以TMS320C6701为核心的信号处理系统, 通过本文提出的快速算法实现了低信噪比下雷体反射回波检测与参数估计。试验结果表明, 基于正反HFM 信号的快速处理算法及数字信号处理(DSP)系统能有效完成低信噪比下的高速目标回波的检测与参数估计, 与仿真结果具有较好的一致性.
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关键词:
- 双曲调频信号 /
- 水下高速小目标 /
- TM S320C6701 /
- 快速算法 /
- 试验
Abstract: According to the characteristics of underwater small high-speed moving target, a fast algorithm o f signal detection and parameter estimation is presented and simulated based on positive and negative hyperbolic frequency modulation (HFM) signals. A dynamic tank test of signal detection and parameter estimation of underwater small high-speed moving target is conducted by adding the time stretch factor in signal transmitting end. The echo of the high-speed moving target is sampled. A signal processing system with a core of TMS320C6701 is designed, and torpedo echo detection and parameter estimation at low signal to noise ratio (SNR) level are completed by the present fast algorithm. The results of the tank test exhibit well consistence with the simulation ones, and show that the digital signal processing (DSP) system and the fast algorithm can effectively complete the echo detection and parameter estimation of underwater small high-speed moving target at low SNR. -
[1] 张静远. 基于小波变换的宽带自导信号处理新技术研究[D]. 武汉: 海军工程大学, 1997: 26-28.Zhang Jing-yuan. Research on New Technology of Wide-band Homing Signal Processing Based on Wave let Trans-form [D]. Wuhan: Naval University of Engineering,1997: 26-28. [2] 黄海宁. 水下宽频带信号处理的理论与技术研究[D]. 西安: 西北工业大学, 2003:21-31. Huang Hai-ning. Research on Underwater Wideband Signal Process[D]. X I’an: Northwestern Polytechnical University, 2003: 21-31. [3] 杨长生, 杨小丰, 李志舜. 基于双曲调频小波变换的水下运动目标参数估计[J]. 鱼雷技术, 2005, 13(3):15-17.Yang Chang-sheng, Yang Xiao-feng, Li Zhi-shun. Parameter Estimation of Underwater Moving Target Based on Hyperbolic Frequency Modulation Wave let Transform[J] . Torpedo Technology, 2005, 13(3): 15-17. [4] 李方慧, 王飞, 何佩琨. TM S320C6000系列DSPs原理与应用[M]. 北京: 电子工业出版社, 2003. [5] 刘宇, 王岩飞, 杨汝良. 基于TMS320C6701高速并行信号处理平台的设计[J]. 现代雷达, 2003, 25 (3):18-20.Liu Yu, Wang Yan-fei, Yang Ru-liang. Design of High Speed Parallel Signal Processing Platform Based on TM S320C6701[J]. Modern Radar, 2003, 25 (3): 18-20. [6] 卞红雨. TM S320C6000 系列DSPs 的CPU 与外设[M]. 北京: 清华大学出版社, 2003. [7] 朱埜. 主动声纳检测信息原理[M]. 北京: 海洋出版社, 1990.
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