专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06985458B2 Multiple band load balancing satellite communication 失效
公开(公告)号：US06985458B2
公开(公告)日：2006-01-10
申请号：US09907508
申请日：2001-07-18
申请人： Jeffery B. Freedman , Ted M. Kaplan
发明人： Jeffery B. Freedman , Ted M. Kaplan
IPC分类号： H04B7/212
CPC分类号： H04L1/0007 , H04B7/1858
摘要： The throughput between a satellite and a plurality of users is controlled by adjusting resources among the users depending on the signal degradation (such as rain fade) experienced by the users. A plurality of time division multiplex (TDM) channels (also called bands) each have a plurality of TDM subchannels corresponding to the users. The channels have different signal fade ranges and the users are assigned to channels based on their signal degradations. Users with signal degradations within a range of each other are assigned to different subchannels within a common channel. Those users with downlinks having substantial signal degradation are given a greater packet length or duration for the data packets of their corresponding subchannels. Additionally, the forward error correction (FEC) code rate is adjusted depending on signal degradation. If some downlinks are experiencing extreme signal degradation, their packet lengths can be reduced to zero and the length (i.e., time within the TDM frame) reallocated to other subchannels until conditions improve.

2. 发明授权

US06871045B2 In-orbit reconfigurable communications satellite 有权
标题翻译：在轨可重构通信卫星
公开(公告)号：US06871045B2
公开(公告)日：2005-03-22
申请号：US09907507
申请日：2001-07-18
申请人： Philip A. Rubin , Jeffery B. Freedman , Ted M. Kaplan
发明人： Philip A. Rubin , Jeffery B. Freedman , Ted M. Kaplan
IPC分类号： H04B7/185 , H04B7/204
CPC分类号： H04B7/18519 , H04B7/2041
摘要： The footprint of a first satellite is reconfigurable in orbit by ground control to switch on and off different transponders. Each transponder is connected to a corresponding downlink antenna feed, each of which transmits a downlink beam independent of the others. The satellite can be moved into different orbits or otherwise changed to service new geographic areas by using different combinations of the transponders. In one embodiment, the satellite includes an antenna and components for an uplink beam corresponding to each downlink beam. Various subsets of the downlink antenna feeds are mechanically linked to move in unison using gimbals, each subset using a corresponding gimbal and mechanical driver. The first satellite is sufficiently reconfigurable that it may serve as a back up satellite to a plurality of other satellites in a constellation of satellites.
摘要翻译：第一颗卫星的占地面积可以通过地面控制在轨道上进行重新配置，可以打开和关闭不同的应答器。每个应答器连接到相应的下行链路天线馈送，每个馈送单独发送下行链路波束。可以通过使用转发器的不同组合，将卫星移动到不同的轨道或以其他方式改变以服务于新的地理区域。在一个实施例中，卫星包括用于与每个下行链路波束对应的上行链路波束的天线和分量。下行链路天线馈送的各种子集被机械地连接以使用万向节一致地移动，每个子集使用对应的万向节和机械驱动器。第一颗卫星是可重构的，它可以作为卫星星座中多个其他卫星的备用卫星。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式