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1. 发明申请

WO2016112288A2 GROUND TERMINAL DESIGN FOR HIGH RATE DIRECT TO EARTH OPTICAL COMMUNICATIONS 审中-公开
标题翻译：高速直接到地球光通信的地面终端设计
公开(公告)号：WO2016112288A2
公开(公告)日：2016-07-14
申请号：PCT/US2016012643
申请日：2016-01-08
申请人： MASSACHUSETTS INST TECHNOLOGY
发明人： BOROSON DON M , ROBINSON BRYAN S , MURPHY DANIEL V , STEWART JASON , KHATRI FARZANA I , CONSTANTINE STEVEN , GEISLER DAVID J , YARNALL TIMOTHY M , DARLING ZACHARY
CPC分类号： H04B10/118 , H04B7/18513 , H04B10/1121 , H04B10/29 , H04B10/40 , H04B10/61 , H04J14/02
摘要： Challenges of direct-to-Earth (DTE) laser communications (lasercom) between spacecraft in low-Earth orbit (LEO) or medium-Earth orbit (MEO) and ground terminals can include short duration transmission windows, long time gaps between the transmission windows, deleterious effects of atmospheric turbulence, and the inability to operate in cloudy weather. Direct-link optical communications systems described herein can have data rates that are high enough to empty high-capacity on-board buffer(s) (e.g., having a capacity of at least about 1 Tb to hundreds of Tb) of a spacecraft in a single pass lasting only tens of seconds to a few minutes (e.g., 1-15 minutes), and overprovisioning the buffer capacity accounts for variations in the latency between links. One or more distributed networks of compact optical ground terminals, connected via terrestrial data networks, receive and demodulate WDM optical data transmissions from a plurality of orbiting spacecraft (e.g., satellites).
摘要翻译：在低地球轨道（LEO）或中地球轨道（MEO）中的航天器与地面终端之间的直接对地（DTE）激光通信（激光通信）的挑战可以包括短持续时间传输窗口，传输窗口之间的长时间间隔，大气湍流的有害影响，以及在多云天气下无法操作。这里描述的直接链路光通信系统可以具有足够高的数据速率，以清空在一个或多个处理器中的航天器的高容量板载缓冲器（例如，具有至少大约1Tb到几百个Tb的容量）单次通过仅持续几十秒到几分钟（例如1-15分钟），并且过度配置缓冲器容量会导致链路之间的延迟变化。通过地面数据网络连接的一个或多个小型光学地面终端的分布式网络接收并解调来自多个轨道空间飞行器（例如卫星）的WDM光学数据传输。

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