signal attenuation

Based on long-term add-up distributing of rain drop intensity in part areas of our country, the rain attenuation of X-band signal transmitting is computed.

基于我国部分地区降雨强度长期累计分布，计算了部分地区X波段信号传输的降雨衰耗。

Aiming at compensating the absorption and attenuation of seismic signal, the paper anew establishes the relationship about absorption coefficient and Q-value, and brings forward a time window method that is base on reverse Q-value to compensate strata absorption and attenuation in frequency domain.

针对地震信号的吸收衰减补偿问题，在重新建立吸收系数和Q值关系的基础上，提出了一种基于反Q补偿的分时窗频域吸收衰减补偿方法。

Methods; To study the relationship between signal attenuation and temperature or time by the theory of diffusion movements on classical physics.

方法：用经典物理学的扩散理论探讨扩散运动引起的信号衰减与温度、时间的关系。

Inputting high-frequency and single pulse signal into coaxial line, the time delay and distortion caused by dispersion can be recorded and measured by digital oscilloscope. The line length and attenuation coefficient are achieved.

将高频单脉冲信号输入同轴电缆，借助数字存储示波器记录输入、输出端的波形和相对延时，可以测量传输线的电缆长度和衰减系数，同时观察脉冲波形因色散引起的畸变。

This paper, based on the measurement of the impedance-frequency characteristics and attenuation characteristics of the city telephone line network, proposes a method of FDM to transfer carrier signal, such as digital modulation signal, tone carrier signal, etc.

在对市内电话信道阻抗特性、衰耗特性测试的基础上，提出市话线路可采用频分复用的方法传递载波信号，如数字调制信号、语言载波信号等。

Based on traditional attenuation factor method, the short-term energy and the short-term zero crossing rate of the speech signal is used to dynamically revise the mixing factor in the proposed method.

该算法在传统的混音衰减因子法的基础上，采用短时能量及短时过零率对混音的衰减因子进行动态修正。

Objective; To compare the dependence of signal attenuation on temperature and time caused by the diffusion movements in inhomogeneous and linear gradient magnetic field.

目的：比较非理想均匀磁场和线性梯度磁场中扩散运动引起的信号衰减对温度、时间的依赖性。

In this paper, a measurement system of UWS electromagnetic pulse radiating field is developed, which consisted of TEM horn, coaxial transmitting line, wide band oscillograph and data processing software for the compensation of signal attenuation and aberration.

介绍了一套自行研制的高功率超宽谱电磁脉冲辐射场测量系统，该系统主要由TEM喇叭接收天线、同轴传输线、宽带示波器及微型计算机组成。

Based on the Fourier transform analysis of saw tooth signal frequency modulation, the concept of power spectrum spread attenuation factor in the case of barrage jamming is presented.

首先通过对锯齿波调频的傅里叶变换，提出了阻塞式干扰下功率谱扩展衰减因子概念；

For the same line with obstructor at the user's terminal the attenuation of carrier signal is weak, when transferring distance is 30km, the applicable frequency range is 0.1~ 200kHz.

当用户处有阻波器时，载波信号衰减很小，在30km范围内可用频段为0.1～200kHz。

Traditional broadcast which transmit by analogue signal have many shortcomings such as signal attenuation, noise, the inflexibility of wiring etc.

但传统广播存在信号衰减、噪音、布线缺乏灵活性，对重复信息、文本信息需人工介入，智能程度差等问题。

Analysis of Underwater Target Signal and Its Effective Attenuation Coefficient

水下目标信号特性及其有效衰减系数分析

The point of degradation, due to attenuation or distortion, at which a signal becomes unusable.

由于衰减或失真使得信号变得不能使用的那个退化点.