radio-wave propagation

In network planning, radio propagation and coverage forecasting are both conducted on the basis of propagation models, while the classical models can not reflect the propagation characteristics of a particular environment accurately. Using these propagation models without calibrating may introduce serious errors into the predicted value.

在网络规划中，无线传播预测和覆盖预测都是基于传播模型进行的，而经典模型无法正确反映某个特定环境的电波传播特性，如果直接应用这些模型，预测值的误差可能很大。

Finally the author gives some suggestions in improving radio propagation in roadways.

最后,提出了改进无线电波在井巷中使用效果的几点建议.

Propagation time and synchronization accuracy of radio signals of short waves

短波无线电信号传输时间及时刻同步精度

Then, an overview of the theory of radio emission mechanisms and the propagation of radio emission in solar coronal was done.

然后对有关射电辐射机制、传播的理论作了一个简要的回顾。

Studies are presented on five radio propagation models in ITU-R recommendations.

文章介绍ITU -R 建议中五项电波传播技术模式的研究情况.