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本文介绍一种以PCM信号为输入的数字相关接收法及其在浅海声释放器上的应用。实验证明,此相关器不但具有很强的抗多路径和起伏的能力,而且实现了干扰背景下弱信号的灵敏、可靠的检测,是某些多路径和时空变的水声信道,特别在条件极其复杂的浅海区域中信息的一种简单而有效的实时相关、实时检测的方法。根据这个原理,设计和制成了高性能的浅海声释放器。实验证明,即使在水深10米左右条件复杂的浅水信道中,几十瓦指令脉冲的释放距离仍可达2.5浬以上。 本文介绍的相关接收法,可应用于水下数字通讯和模拟信息的数字传输等方面。
This paper introduces a digital correlation receiver with PCM signal as input and its application in shallow sea sound releaser. Experiments show that this correlator not only has strong ability to resist multipath and undulation, but also realizes the sensitive and reliable detection of weak signals in the background of interference. It is some of the multipath and space-time variable underwater acoustic channels, especially under the condition of A Simple and Effective Real-Time Correlation, Real-Time Detection Approach to Information in Extremely Complex Shallow Sea Areas. According to this principle, the design and manufacture of high-performance shallow sea sound release device. Experiments show that, even in shallow water channel depth of about 10 meters, tens of watts command pulse release distance is still up to 2.5 浬. This article describes the relevant receiving method can be applied to underwater digital communications and analog digital transmission of information and so on.