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- Direct Wave Direction Finding 直接波测向
- Talk on the radio direction finding technology? 无测向能定位吗?
- After correlating with database deposited, the direction finding was realized. 与预存数据库进行相关,完成通信测向。
- High accuracy can be obtained in direction finding system where the angle of incidence is determined by the phase information of the incident wave, but the mutual coupling between antennae will effect the performance of the system. 利用相位信息确定来波入射角能达到较高的精度，但测向天线之间的互耦对系统性能的影响很大。
- Abstract: High accuracy can be obtained in direction finding system where the angle of incidence is determined by the phase information of the incident wave, but the mutual coupling between antennae will effect the performance of the system. 文摘:利用相位信息确定来波入射角能达到较高的精度，但测向天线之间的互耦对系统性能的影响很大。
- The time lag between the direct wave and the scattered wave could be computed by using the simplex algorithm method. 当弯曲波在传递时遇到平板裂缝则会产生散射波，因此含有裂缝平板的板波讯号即包括弯曲波的直接波传与裂缝引起的散射波传。
- Direction finding of low probability intercept(LPI) signals is the difficult problem in modern EW system. 低截获概率(LPI)信号的测向是现代电子战的一大难题。
- At present, wide-band direction finding is one of important researching subjects in radar and electronic counterwork. 给出了宽带信号测向中求聚焦矩阵的一大类方法,聚焦前后阵列信噪比没有任何损失。
- This paper discusses the direction finding characteristic of passive monopulse seeker. 主要讨论被动单脉冲导引头对旁瓣目标的识别。
- Crosswell seismic wavefield contains different wave such as reflection waves, direct waves, and tube waves. 井间地震波场丰富，含有反射波、直达波和管波等多种波型。
- Interferometer direction finding technique is adapted to estimating Direction-of-Arrival (DOA) of a single pulse.It can not resolve multiple signals. 摘要传统干涉仪测向是对单个脉冲信号测向的，对于多信号没有分辨能力，对于线性调频等时变频率信号也不能直接应用。
- The shape and energy distribution of direct wave is mainly influenced by drift,while the energy distribution of reflected wave is influenced mainly by the interface between coal and rock. 巷道对各道直达波能量分布及波列形状有明显影响 ; 煤岩分界面主要影响反射波能量分布。
- This method is to detect and track direct wave at receiving station.Received direct signals are integrated incoherently, filtered, made analysis of spectrum and then time synchronous signals are got. 在接收站对直达波进行检测和跟踪，再经非相干积累、滤波、谱分析等处理来提取同步信号，分析其性能。
- In the end, we discuss the direction finding algorithms of UCA for the coherent signal sources and the wide-band cyclostationary signal sources, respectively. 最后,分别对相干信源和宽带循环平稳信源的UCA测向算法进行了研究。
- This paper uses the Quadratic/Linear Traveltime Interpolation (QLTI) ray tracing method to get the traveltime of the headwave including direct wave, reflection wave, and refraction wave. 采用旅行时线性/二次联合插值射线追踪算法(QLTI算法)对包括直达波、折射波、透射波在内的多种射线进行追踪,得到井间层析成像的旅行时,它的突出优点是精度高。
- This paper applies the array manifold interpolation wideband direction finding algorithm on uniform linear array,and gives other two methods of seeking transformation matrix. 文中把阵列流行内插宽带测向算法应用到均匀线阵上,并给出了求变换矩阵的另外两种方法。
- It uses the time-frequency localization characteristic of the wavelet analysis and their correlations on the direct wave,target reflected signals and stochastic noise in multichannel GPR d... 通过实验数据和现场实测数据验证了该方法的有效性。
- The functions and designing ideas of the software were reported according to the Practice in the judgement of direction finding game with radiogoniometer. 本文就无线电测向比赛的裁判工作实际,浅谈该项应用软件的功能与其设计思想。
- Tannuri E A, Sparano J V, Simos A N,et al.Estimating directional wave spectrum based on stationary ship motion measurements. 马志良;罗德涛;主编.;近海移动式平台
- Using the concept of directional wave fields, the characteristics of the wave field around a detached breakwater were studied. 摘要本研究利用方向频谱探论离岸堤周围波场的特性。
