短波传播

利用新研制的短波传播时延实时数字显示系统，在武汉电离层观象台对BPM时号的传播时延进行了长时间连续观测。

Continous observations of the propagation delay variation of BPM standard time signal were carried out in real time at Wuhan Ionospheric Observatory by a digital display system .

近海短波传播方式的确定具有现实意义。

The determination of offshore short-wave propagation pattern has realistic meaning .

近海短波传播方式确定方法及相关分析

Determination Method and Correlation Analysis of Offshore Short-wave Propagation Pattern

电离层变化对短波传播时延的影响及改正

The effects of ionospheric variation on time lag of short wave propagation and its corrections

提出了固体中短波传播数值模拟的单位分解有限元法。

A special integration scheme for partition of unity finite element method for short wave propagation in solids ;

但是世界基督教广播公司仍然坚持使用短波来传播节目。

But World Christian Broadcasting still has faith in shortwave radio .

辽宁区域地震短波通信传播特性和频率选择探讨

Research on transmission characteristics and frequency selection of seismic short wave communication in Liaoning

短波天波传播频率预测是短波天波通信电路性能预测的前提。

The frequency prediction of skywave propagation in shortwave band is the precondition of performance prediction of skywave communication circuit .

通过讨论短波信号的传播特性，可以导出短波通信选择工作频率的一些基本原则以及实现频率管理的方法，并且在此基础上介绍了实时频率选择技术的现状与发展。

With discussion of the propagation character of HF channel , some principles of frequency management could be acquired . Then the development and status in quo of RTFS technology is introduced .

短波通信在电波传播研究、频率自适应通信、中高速数据通信、组网通信、自适应跳频通信以及近垂直入射天波通信等方面都取得了重大突破。

Studies on the propagation of the skywave and the groundwave , the adaptive communications , the high speed data transmission , the net communication , the adaptive hopping frequency communications , and the near vertical incidence skywave communications have got some significant results .

本文结合自行研制的新型短波监测设备，对短波传播理论、无线电测向技术、数字信号处理理论和软件无线电理论等进行了深入研究，并将其应用于设备中。

Combined with the newly developed Short-wave Monitor and Meterage System , the paper gives a thorough investigation on short-wave diffuse theory , radio direction detecting technology , DSP theory , Software Radio theory , ect .