| 1. | A radio signal travels very quickly
无线电信号传播得很快。 |
| 2. | Characteristics test of acoustic emission signal transmission in wave guiding rod
波导杆中声发射信号传播特性实验 |
| 3. | The reduction in size of components and circuits for increasing package density and reducing power dissipation and signal propagation delays
减少元件和电路的几何尺寸，以达到增加电路的封装密度、减少功耗和减小信号传播延迟的目的。 |
| 4. | In this paper , firstly , basic knowledge about ionosphere and some important ionospheric parameters which will affect the propagation of signals were introduced
本论文首先简要介绍了电离层的概况及其影响到信号传播的一些重要参数。 |
| 5. | Based on coarse data of positions of user and satellite , estimation algorithms of propagation delay between different satellites and users are given
基于用户和卫星的概略位置，给出了适用于不同类型导航星和不同用户场景的卫星信号传播时延估计算法。 |
| 6. | This dissertation has studied the effects caused by terrain environment on the propagation of rf signal . the effects includes land clutter , multipath and diffraction
论文主要研究地面环境对射频信号传播的影响,包括三个方面的内容:地杂波效应、多路径效应和衍射效应。 |
| 7. | Then critical technologies of simulation system are discussed , including frame processing structure , fh sequence generator , simulation models of path loss and multipath channel , simulation of signal propagation delay and jamming signal etc
其次，讨论了仿真系统实现的关键技术，包括帧处理结构、跳频序列发生器、路径损耗与多径信道仿真模型、信号传播延时及干扰信号的仿真等。 |
| 8. | The accuracy is n ' t satisfying . by theoretic analysis and drive test , propagation characteristics are studied & several modified models are presented in this paper . the accuracy is improved by using the new model in the actual engineering
本文通过理论分析和大量的实际测量，研究了无线信号传播的特点，提出了几个修正模型，提高信号场强的预测精度，并把修正模型运用到实际工程当中。 |
| 9. | In satellite navigation and positioning system , time is important information for fast and direct acquisition of long cycle code , one of its important aspects is the uncertainty compression of signal ' s propagation delay to reduce time search range
摘要卫星导航定位系统中，辅助长码快捕的一个最重要的信息是时间信息，卫星信号传播时延估计是提供先验时间信息，减少时域搜索范围的一个重要方面。 |
| 10. | Also , much related research requires the narrowband assumption , which is not always realistic in practical applications . it is necessary to analyze the effects of finite bandwidth to bearing estimation of spatially distributed source . additionally , more complex noise models should be dealt with in practical situations as well as that of white gaussian noise
不过，其中多数方法仅适用于小角度扩展情况，当角度扩展比较大时，需要在估计的稳健性和运算量之间进行折中；而且，许多方法要求信号传播满足窄带假设，这在实际的应用场合中可能很难得到满足，有必要分析信号带宽对分布源波达方向估计的影响；另外，也有必要考虑空间色噪声环境中的分布源波达方向估计问题。 |
