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本文阐述遥控水下系统非同步动作的声脉冲周期编码(PTC).具有编码灵活、电路简单、指令多的特点,适合在变参的水声信道中传输.对其相应的信号检测采用锁相环频率自动跟踪窄带滤波和周期双符合检测器,构成准最佳检测系统,能在强干扰背景下提取弱信号,并加以正确判决、准确可靠地检出特定的编码指令.几十瓦脉冲声功率的作用距离可达4n mile以上.电路采用低功耗CMOS器件,耗电省、体积小.经多次海上实验,证明其性能优越.
This paper describes the acoustic pulse period code (PTC) for remote control underwater system asynchronous operation with the characteristics of flexible coding, simple circuit and multi-instruction, which is suitable for transmitting in variable channel acoustic channel.The corresponding signal detection is phase locked Ring frequency automatic tracking narrowband filter and periodic double coincidence detector to form a quasi-optimal detection system can extract weak signals in the context of strong interference and correct judgments, accurate and reliable detection of specific coding instructions. The power of the role of up to 4n mile above the circuit using low-power CMOS devices, power consumption, small size. After many sea experiments to prove its superior performance.