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Tri‐orthogonal polarization diversity reception for non‐geosynchronous satellite orbit ionospheric channels 下载免费PDF全文
Nicholas P. Lawrence Hedley J. Hansen Derek Abbott 《International Journal of Satellite Communications and Networking》2018,36(1):44-65
Electromagnetic signals propagating through the ionosphere are subject to path delay and the depolarizing effect of Faraday rotation. These are both dependent on global position and link geometry, which constantly vary for satellites in non‐geosynchronous orbits. These effects introduce performance error and reduce range resolution of remote sensing polarimetric measurements. Communication with ground receivers may be severely degraded by these effects. In this paper, a tri‐orthogonal approach at the receiver is introduced to enhance performance of conventional polarization diverse receive schemes. Performance is measured through a capacity metric. The work presented forms part of a large‐field‐of‐view, non‐geosynchronous satellite model exploiting tri‐orthogonal receive polarimetry as a means to enhancing link performance in a field‐of‐view. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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遥感卫星具有技术要求低、成本低、发射简单、无轨位限制等特点,可广泛应用于各种领域,目前我国已建成陆地观测、海洋观测和大气观测等多领域的遥感观测。遥感卫星大部分属于非静止轨道(NGSO)卫星,数量庞大的NGSO遥感卫星不断涌现和部署,对卫星业务及频率轨道资源的监管带来严峻挑战,为促进无线电频率轨道资源的有效使用,开展NGSO遥感卫星的监测迫在眉睫。 相似文献
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针对我国Ka频段使用卫星固定业务的非对地静止卫星轨道(Non-Geostationary Satellite Orbit,NGSO)星座系统对对地静止卫星轨道(Geostationary Satellite Orbit,GSO)系统的干扰问题开展研究.在梳理国际电联技术建议书和《无线电规则》的基础上,通过理论分析和仿真计算等手段,对不同链路场景下NGSO星座系统对GSO系统在Ka频段的干扰问题进行分析计算.研究结果表明,在NGSO星座系统与GSO系统上下行通信有重叠部分的频段,其对GSO系统都会产生严重干扰.最后给出降低干扰的措施与建议.为我国未来拟使用Ka频段的NGSO星座系统对GSO系统的干扰分析提供参考. 相似文献