attenuation network

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。

-An error analysis for the dual six-port network analyzer is given. The estimation of the error limits from various sources for measuring the reflection coefficient, attenuation and phase shift is discussed in detail.

本文给出了双六端口网络分析仪的误差分析方法，详细讨论了测量反射系数、衰减和相移时各个分项误差大小的估计。

The notching circuit made of this kind of twin T network can increase the attenuation slop outside the pass-band but decrease signal loss within pass-band.

采用这种双T网络做成的陷波电路，可使通带外的频带衰减陡度增大，而通带内的有效信号损失减小。

Thirdly, this paper improving the formula of attenuation relay distance, raise the accuracy of the construction plan. And calculate 10G high-speed attenuation relay distance to ensure enough data bandwith and upgrading capacity in the new MSTP network.

论文还通过改善衰减中继距离计算公式，提高了MSTP工程建设规划精度，通过10G高速业务中继段距离的计算，为目前MSTP网络有足够的繁冗性和数据带宽的可升级能力提供支持。

As for the multi-floor propagation environment, the empirical attenuation factor model is introduced in order to provide some references for indoor field strength prediction and mobile network planning in multi-floor buildings.

对多楼层传播环境，给出经验性的衰减因子模型，为工程实践中多层建筑物的室内场强预测和移动网络规划提供参考。