【摘要】 本文提出一种利用增益可控部件与微机组成的环路对大动态范围的水声脉冲信号进行脉冲内增益控制并进行幅度精测的方法。该方法对包络有畸变和信号幅度有起伏的情况亦可得到满意效果。文中介绍了瞬时幅度增益控制及幅度测量的基本数学模型、硬件实现方法以及为使系统按要求的声级进行转发（应答）时系统的标校方法。更多还原

【Abstract】 This paper presents a method to control the gain and measure the amplitude exactly forunderwater sound pulse with a wide dynamic range, in which a loop composed of gain controlled unit andndcrocomputer is employed. This method also has a satisfactory result when there are distortion with signalenvelop and fluctuation with signal amplitude. The basic mathematical model of instantaneousamplitude-gain-control and amplitude measuring, the hardware strueture are presented. The calibrationmethod of the system for re-transmitting (response) as required sound level is given as well.更多还原