基于正反HFM信号的水下高速小目标处理算法与试验分析  

Fast Algorithm and Test of Underwater High-Speed Moving Target Based on Positive and Negative HFM Signals

作　　者：明星[1] 张建超[1] 

机构地区：[1]中国人民解放军92635部队

出　　处：《鱼雷技术》2010年第3期186-191,共6页Torpedo Technology

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.According to the characteristics of underwater small high-speed moving target, a fast algorithm of signal detection and parameter estimation is presented and simulated based on positive and negative hyperbolic frequency modulation （I-IFM） 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.

关 键 词：双曲调频信号 水下高速小目标 TMS320C6701 快速算法 试验 

分 类 号：TJ630.34[兵器科学与技术—武器系统与运用工程]