一种多点实时收发尺度目标模拟器的DSP实现方法

摘要

In underwater acoustic countermeasure there is a big difference between the single-receiving mul-ti-transmitting scale target simulator and the real submarine echo. In this paper, an implementation method of mul-ti-point real-time receiving/transmitting scale target simulator based on advanced digital signal processor(ADSP) is pre-sented. This method adopts the multi-point receive-transmit mode and the multi-channel signal parallel real-time detec-tion and processing to improve the target simulatorʹs simulation fidelity of underwater target in terms of the space echo characteristics and the time/frequency domain characteristics. Test results show that the minimal time delay of the sys-tem can be controlled less than 10 ms, and the difference between time delay simulation and target strength simulation is reduced, thus the echo frequency of each highlight is more close to the real submarine echo frequency. This study may provide reference for further optimization of the scale target simulation technology.%针对水声对抗中单收多发尺度目标模拟器模拟回波与真实潜艇回波存在着较大差异，介绍了一种基于高级数字信号处理器(ADSP)的多点实时收发尺度目标模拟器的实现方法，采用多点收发方式，多通道信号并行实时检测处理，从回波的空间特性、时频域特性等方面提高目标模拟器对水下尺度目标的模拟逼真程度。测试结果表明，系统的最小时延一般可控制在10 ms内，减少了时延模拟和目标强度模拟的差异，在各亮点回波频率上更接近于真实潜艇回波。该研究可为尺度目标模拟技术的进一步优化提供参考。