宽带多普勒测速声呐数字仿真系统设计

The Digital Simulation Design of Broadband Doppler Sonar Systemfor Velocity Measurements

宽带多普勒测速声呐基本原理为声波在水中的多普勒效应,通过测量声波经海底散射产生的多普勒频移,得到载体相对海底的绝对速度。根据宽带多普勒测速声呐工作特点,进行理论分析,提出了基于椭圆条带分割形式的海底散射回波模型,并设计了基于Matlab平台的宽带多普勒测速声呐仿真系统,通过仿真系统可以较为方便的研究发射信号形式及回波信号处理算法对测速精度的影响,为设计更高精度多普勒测速声呐设备提供一定的参考价值。

Broadband Doppler sonar for velocity measurements is based on sound waves Doppler effect in water. It can get the instrument＇ s absolute velocity vector to sea - bottom by measuring the sound waves Doppler frequency shift that generated by sea - bottom backscattering. According to the characteristics of broadband Doppler sonar for velocity measurements work, after theoretical analysis, the model of sea - bottombackscattering based on the split form of ellipse is put forward, and the simulation system ofbroadband Doppler sonar for velocity measurements based on Matlab platform is designed. The simulationsystem can be more convenient toresearch the effect of the transmission signal form and the echo signal processing algorithms for echo measurement precision. Therefore, the simulation system provides some reference value for the design of high precision velocity measurement instrument in the future.