On the base of hardware approach, to discuss all the theory involve in active detecting sonar system, including the selection of signal waveform, digital signal sampling, digital signal processing.
以硬件为基础，对所涉及到的理论都作论述，包括探测声纳的信号波形选择，数字信号采样、处理原理与方法。
The U. S. Navy plans to deploy a new submarine detection system, known as Low Frequency Active Sonar (LFA), throughout 80% of the world's oceans.
在世界的 80% 的大海各处，美国海军计划部署一个新的海中发现系统，即是低的频率活跃的声纳 （LFA） 。
On the base of the active sonar theory, This thesis provide active ultrasonic detecting system that application in low-speed moving object of short-range in shallow sea surroundings.
论文文摘本论文基于主动声纳的基本原理，提出适用于浅海环境水下近程低速目标主动声探测系统。
On the base of the active sonar theory, This thesis provide active ultrasonic detecting system that application in low-speed moving object of short-range in shallow sea surroundings.
论文文摘本论文基于主动声纳的基本原理，提出适用于浅海环境水下近程低速目标主动声探测系统。
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