公开(公告)号：US07043199B2

公开(公告)日：2006-05-09

申请号：US09875607

申请日：2001-06-06

申请人： Jerry Dai ,  Stan Kay ,  Yezdi Antia ,  Zhenliang Shi ,  Anwer Khan ,  Gaguk Zakaria

发明人： Jerry Dai ,  Stan Kay ,  Yezdi Antia ,  Zhenliang Shi ,  Anwer Khan ,  Gaguk Zakaria

IPC分类号： H04B7/185

CPC分类号： H04B7/18543

摘要： An uplink power control system for terminals in a satellite communication system provides closed loop power control using feedback signals generated at a satellite. The satellite performs inter-beam routing of uplink signals from satellite terminals, and processing of uplink signals to generate terminal transmission-specific feedback information that is transmitted in downlink signals to the terminals. The satellite also generates a beacon signal. An uplink power control algorithm at each terminal uses the beacon signal and feedback data to adjust transmit power.

公开(公告)号：US07386310B2

公开(公告)日：2008-06-10

申请号：US10705314

申请日：2003-11-10

申请人： Jerry Dai ,  Anwer Khan ,  Stan Kay ,  Yezdi Antia

发明人： Jerry Dai ,  Anwer Khan ,  Stan Kay ,  Yezdi Antia

IPC分类号： H04Q7/20

CPC分类号： H04B7/18543 ,  H04B7/18513

摘要： A satellite communications system having a fallback mode of operation, during which uplink signals are transmitted at a reduced data rate, is provided with a novel fallback mode ingress/egress mechanism utilizing a combination of a feedback-based fade detection scheme and fade detection based on parameters independent of the uplink signal transmission. The fallback mode ingress/egress mechanism is responsive to a satellite beacon signal independent of the uplink signals and to feedback signals produced by the satellite in response to the uplink signals, for requesting a satellite terminal to switch into the fallback mode when either the feedback signals indicate an increase in a fade level or in response to a first value of a selected parameter of the satellite beacon signal. The fallback mode ingress/egress mechanism requests the satellite terminal to switch out of the fallback mode in response to a second value of the satellite beacon signal parameter.

摘要翻译： 具有以降低的数据速率发送上行链路信号的回退操作模式的卫星通信系统被提供有利用基于反馈的渐变检测方案和基于褪色检测的褪色检测的组合的新型回退模式入口/出口机制 参数独立于上行链路信号传输。 回退模式入口/出口机制响应于卫星信标信号而独立于上行链路信号，并响应于上行链路信号产生的反馈信号，用于当卫星终端反馈信号 指示衰落水平的增加或响应于卫星信标信号的选定参数的第一值。 回退模式进/出机构响应于卫星信标信号参数的第二值请求卫星终端切换回退模式。

公开(公告)号：US06622006B1

公开(公告)日：2003-09-16

申请号：US09677524

申请日：2000-10-02

申请人： Ludong Wang ,  Yezdi Antia ,  Jerry Dai

发明人： Ludong Wang ,  Yezdi Antia ,  Jerry Dai

IPC分类号： H04B7185

CPC分类号： H04B7/18506

摘要： A communications system has a high altitude communication device generates a plurality of user link beams having a first communication characteristic and a feeder link having a first communication characteristic. A gateway terminal receives the user link beam for receiving a first received signal and a second received signal thereafter. The receiver circuit has a recursive filter for generating differential amplitude of symbol timing estimate from said first received signal.

摘要翻译： 通信系统具有高空通信装置，生成具有第一通信特性的多个用户链路波束和具有第一通信特性的馈线链路。 网关终端接收用于接收第一接收信号的用户链路波束和其后的第二接收信号。 接收器电路具有递归滤波器，用于从所述第一接收信号产生符号定时估计的差分幅度。