水下接收的噪声问题是大家都很关心的课题,因为它直接限制丁接收机的下潛深度。本文提出一种计算水下噪声强度的方法,根据电磁波通过损耗媒质分析水下接收时出现的噪声大小和对接收机输出端信噪比的计算,推导出极限接收深度的有用公式。根据此公式的计算表明,结果与实验数据比较一致。 The problem of noise received underwater is a subject of great concern to everyone as it directly limits the dive depth of a D-receiver. In this paper, a method of calculating underwater noise intensity is proposed. Based on the analysis of electromagnetic noise through lossy medium and the calculation of signal to noise ratio (SNR) at receiver output, a useful formula for the ultimate receiver depth is deduced. Calculations based on this formula show that the results are in good agreement with the experimental data.