点波束

低轨卫星移动系统的点波束确定算法

Spot Beam Judgement Algorithm of Low Earth Orbit Satellite Mobile System

根据星座空间几何基础，以及卫星对地面的覆盖情况以及点波束的形状，通过建立数学模型，提出了地面终端确定所在点波束的仿真算法；

According to the space geometry , the coverage of satellite constellation on earth , and the shape of spot beam , by building up mathematic model , a spot beam judgement simulation ( algorithm ) is proposed .

Inmarsat-B与Inmarsat-F系统点波束控制比较

Comparing Spot-Beam Control between Inmarsat-B and Inmarsat-F

根据NGSO卫星移动通信系统的关键技术和发展趋势，本文对其组网关键技术进行了深入研究，内容涉及星座设计、星际链路、点波束以及卫星星座网中的路由、切换等。

According to the key techniques and development trends of the NGSO mobile satellite communication , this dissertation mainly focuses on the networking technologies in the NGSO satellite networks , which includes constellation design , inter-satellite link , spot-beam design , routing and handover .

低轨卫星系统星载多波束天线点波束设计及优化

Spot-beam Design and Optimization of On-board Multi-beam Antenna for LEO Satellite Systems

讨论了卫星蜂窝通信系统的点波束设计。

The spot-beam design in the satellite-based cellular communication systems is discussed mainly .

针对具有点波束的低轨卫星移动通信系统，提出了一种信道动态预留策略。

A dynamic channel reserve strategy for LEO communication system with spot-beam is proposed .

在分析链路损耗与点波束天线增益之间制约关系的基础上，提出了一种新的点波束优化设计模型&链路电平平衡点波束模型。

On the basis of discussing the analyzed restraint relationship between the link loss and the spot-beam antenna gain a new spot-beam model of optimum design named link level balance spot-beam model is proposed .

为适应军用卫星通信发展韵需求，卫星通信系统要求星载天线不仅能够生成高质量的点波束，而且还需要具有在其服务区内进行快速灵活的波束扫描的能力。

To meet the demand for the development of military satellite communication , satellite antennas are required not only to produce spot beams with high quality , but also to have the flexible ability of beam scanning in their service region .

计算结果表明，该点波束模型能使各点波束小区的链路电平预算余量达到平衡，并使星上功率得到更有效的利用，弥补了现有模型的不足，具有较高的应用价值。

The calculation result shows that the model can keep the balance of the link level budget margin among the different spot-beam cellars , the onboard power in satellite can be used more effectively and the model is possessed of better applied value .

为了满足高容量系统的要求，近几年发展了许多新的技术，其中为了解决多个点波束区域的通信，被称为时分多址/星上交换（TDMA/SS）技术便应运而生。

To meet the needs of high capacity system , new technologies are being developed , and one of the most recent is the system known as time division multiple access , satellite switched ( TDMA / SS ) which is suitable for multiple spot beam zones .

采用电磁仿真和实验的方法研究了同轴馈源辐射方向图-10dB点波束宽度的调整方法和减小同轴馈源电压驻波比和轴比的技术途径。

The feed is a coaxial form in S-band and a circular waveguide form in X-band . The technique is studied by making use of EM simulation and experimentation for adjusting the beamwidth of - 10 dB and reducing the VSWR and axial ratio for circular polarization .

针对任意非高斯信号的快速固定点盲波束形成方法

Fast fixed point blind beamforming algorithm for arbitrary non-Gaussian signals

当观察点接近波束轴线时，可用近轴近似法简化计算。

To simplify the calculation , a paraxial approximation is employed when the observer is located near the beam axis .

文章提出一种新型结构，通过加入变容二极管，实现了在固定频点上波束可控，更适于实际应用。

Through adding varactors , a new structure is introduced and it realizes controllable wave-beam of fixed frequency which is better for practical use .

根据复射线理论，利用复源点高斯波束场来模拟天线的远场方向图。

Based on complex ray theory , the Gaussian beams emitted by complex source points are employed to simulate the far-field pattern of antennas . In this paper .

复点源脉冲波束在理想导电体上的散射

Complex Source Pulsed Beams Scattering in Perfectly Conducting Cylinders

导出了复射线场拟合的权函数，分析了复源点间距和波束宽度参量等对拟合精度的影响，讨论了口径平面上及口径平面外的拟合误差。

In this paper , the weight function of complex ray simulation is derived , the influences of complex source point spacing and beam width parameter on simulation accuracy are analyzed , and the simulation errors on and beyond the simulation aperture plane are dis - cussed .