公开(公告)号：US07174127B2

公开(公告)日：2007-02-06

申请号：US10246868

申请日：2002-09-17

申请人： David D. Otten ,  David G. Duckworth

发明人： David D. Otten ,  David G. Duckworth

IPC分类号： H04B7/185 ,  H04Q7/20

CPC分类号： H04B7/18563 ,  H04B7/1858 ,  H04L12/5692

摘要： A hybrid satellite communications system provides communications, particularly Internet access, to computer users. The hybrid satellite communications system includes a satellite system and a terrestrial communications system. The satellite system includes two transceivers. The first transceiver receives and transmits a first set of signals received from the terrestrial communications system to a plurality of user units. In reverse fashion, the satellite systems second transceiver receives a second set of signals in a second frequency band from the user units and transmits those signals back to the terrestrial communications system. The first set of signals (downlink signals) are of much higher frequency than the second set of signals (uplink signals). Preferably, the first set of signals are relayed by a Direct Broadcast System (DBS) satellite in a frequency band between 12.2 GHz and 12.9 GHz, while the second set of signals are relayed by a Mobile Satellite System (MSS) satellite operating between 1.0 GHz and 3.0 Ghz, or relayed by a terrestrial node operating between 0.8 and 2.0 Ghz. The differences in frequency between the first set of signals and second set of signals is considered optimal for the transmission and receipt of communications between a computer user with the Internet. Moreover, the present invention is capable of using the present communications infrastructures dedicated to the satellite transmission of television via DBS satellites, satellite cellular communications via MSS satellites, and radio communications via terrestrial cellular systems.

摘要翻译： 混合卫星通信系统向计算机用户提供通信，特别是互联网接入。 混合卫星通信系统包括卫星系统和地面通信系统。 卫星系统包括两个收发器。 第一收发器接收并发射从地面通信系统接收的第一组信号到多个用户单元。 以相反的方式，卫星系统第二收发机从用户单元接收第二频带中的第二组信号，并将这些信号发送回地面通信系统。 第一组信号（下行链路信号）的频率高于第二组信号（上行链路信号）。 优选地，第一组信号由在12.2GHz和12.9GHz之间的频带中的直接广播系统（DBS）卫星中继，而第二组信号由在1.0GHz之间工作的移动卫星系统（MSS）卫星中继 和3.0 Ghz，或由运行在0.8和2.0 Ghz之间的地面节点进行中继。 第一组信号和第二组信号之间的频率差异被认为是用于互联网的计算机用户之间的通信的发送和接收的最佳的。 此外，本发明能够使用专用于经由DBS卫星进行电视卫星传输的当前通信基础设施，经由MSS卫星的卫星蜂窝通信以及经由陆地蜂窝系统的无线电通信。

公开(公告)号：US5511233A

公开(公告)日：1996-04-23

申请号：US223437

申请日：1994-04-05

申请人： David D. Otten

发明人： David D. Otten

IPC分类号： H04B1/16 ,  H04B7/185 ,  H04B7/26 ,  H04W16/14 ,  H04B1/00 ,  H04B7/00

CPC分类号： H04W16/14 ,  H04B7/18513 ,  H04B7/18563 ,  H04B7/18532

摘要： A mobile communications system provides communications with mobile users in the interference zones of communications services having priority of use of the frequency band in which the mobile user operates. The frequency band has been previously allocated for use by the other services, such as fixed microwave service (FMS); however, by means of the invention, the mobile user is able to conduct communications operations on a subband or subbands in that frequency band. A position locating system determines the position of the mobile user and if the user is within an interference zone, the mobile user is assigned subbands for operation in the previously allocated frequency band that are outside the subbands of operation of the FMS. A memory accessible by the processor selecting the frequency band of operation of the mobile user includes descriptions of the transmit and receive interference zones of each FMS. The processor selects the frequency subband of operation of the mobile user based on its position relative to the interference zone or zones. The system may have surface and/or space nodes and a network controller that monitors the mobile user's position and controls the nodes and user to subbands. Mobile users are isolated from the fixed microwave sites either by continuous management of their frequency assignments by calculations and commands sent from the network controller to the mobile user or by computations by the mobile user's unit. The mobile system is frequency agile by operating in dynamically selectable frequency subbands.

摘要翻译： 移动通信系统提供与移动用户操作的频带优先使用的通信业务的干扰区域中的移动用户的通信。 频段以前已分配供其他服务使用，如固定微波服务（FMS）; 然而，借助于本发明，移动用户能够对该频带中的子带或子带进行通信操作。 位置定位系统确定移动用户的位置，并且如果用户在干扰区内，移动用户被分配用于在FMS的操作子带之外的先前分配的频带中操作的子带。 选择移动用户的频带的处理器可访问的存储器包括每个FMS的发送和接收干扰区域的描述。 处理器根据其相对于干扰区或区的位置来选择移动用户的频率子带。 系统可以具有表面和/或空间节点以及监视移动用户的位置并且控制节点和用户到子带的网络控制器。 移动用户通过从网络控制器发送到移动用户的计算和命令的持续管理或者通过移动用户的单元的计算来连续地管理固定的微波站点。 移动系统通过在动态可选择的频率子带中操作来进行频率敏捷。

公开(公告)号：US5835857A

公开(公告)日：1998-11-10

申请号：US751651

申请日：1996-11-18

申请人： David D. Otten

发明人： David D. Otten

IPC分类号： H04B7/005 ,  H04B7/185 ,  H04B7/204 ,  H04B7/216 ,  H04L1/00 ,  H04L1/20 ,  H04L5/02 ,  H04L12/28 ,  H04W52/08 ,  H04W52/10 ,  H04W52/22 ,  H04W92/02 ,  H04Q7/00

CPC分类号： H04W52/228 ,  H04B7/18532 ,  H04B7/18558 ,  H04B7/18567 ,  H04B7/2041 ,  H04B7/216 ,  H04L1/004 ,  H04L1/0042 ,  H04L1/0047 ,  H04L1/0071 ,  H04L1/20 ,  H04L5/02 ,  H04W52/225 ,  H04B7/18517 ,  H04B7/18534 ,  H04B7/18543 ,  H04W12/08 ,  H04W12/12 ,  H04W52/08 ,  H04W52/10 ,  H04W92/02

摘要： Methods for operating a wireless communications system provided for reducing the use of the system by unauthorized users by establishing the geographical location of selected user, comparing this location with the known locations of authorized users and denying service to the selected user if the selected user's location does not correspond to the known location of authorized users. Seamless hand-over of a user between nodes of the communication system is effected by periodically recomputing a algorithm which determines a preferred node for communication with the user. When the algorithm indicates that another node is preferred, a call initiation handshake is established between the user and the preferred node, while still maintaining communication with the original node. Communication between the user and the first node is not interrupted until the user establishes a communication "lock" with the second node. Passive intermodulation interference of signals transmitted and received by nodes of a multi-satellite node system is eliminated by using certain of the satellite nodes for transmit-only and other of the satellite nodes for receive-only operation. In another embodiment PIM interference is eliminated by time duplexing the signals transmitted and received by a satellite's antenna. PIM interference is also reduced by assigning unique portions of each transmitter subband and each receiver subband to each of the satellite nodes.

摘要翻译： 用于操作无线通信系统的方法，用于通过建立所选用户的地理位置来减少未授权用户对系统的使用，将该位置与授权用户的已知位置进行比较，并且如果所选择的用户的位置是 不符合授权用户的已知位置。 通过周期性重新计算确定用于与用户通信的优选节点的算法来实现通信系统的节点之间的用户的无缝切换。 当算法指示另一个节点是优选的时，在用户和优选节点之间建立呼叫发起握手，同时仍保持与原始节点的通信。 用户与第一个节点之间的通信不会中断，直到用户与第二个节点建立通信“锁定”为止。 通过使用某些卫星节点仅用于发射和其他卫星节点进行接收操作，消除了由多卫星节点系统的节点发射和接收的信号的被动互调干扰。 在另一个实施例中，通过对卫星天线发射和接收的信号进行时间双工来消除PIM干扰。 通过将每个发射机子带和每个接收机子带的唯一部分分配给每个卫星节点也可以减少PIM干扰。

公开(公告)号：US06522865B1

公开(公告)日：2003-02-18

申请号：US09371316

申请日：1999-08-10

申请人： David D. Otten

发明人： David D. Otten

IPC分类号： H04B7185

CPC分类号： H04B7/1858

摘要： A hybrid satellite communications system provides communications, particularly Internet access, to computer users. The hybrid satellite communications system includes a satellite system and a terrestrial communications system. The satellite system includes two transceivers. The first transceiver receives and transmits a first set of signals received from the terrestrial communications system to a plurality of user units. In reverse fashion, the satellite systems second transceiver receives a second set of signals in a second frequency band from the user units and transmits those signals back to the terrestrial communications system. The first set of signals (downlink signals) are of much higher frequency than the second set of signals (uplink signals). Preferably, the first set of signals are relayed by a Direct Broadcast System (DBS) satellite in a frequency band between 12.2 GHz and 129 GHz, while the second set of signals are received and transmitted by a Mobile Satellite System (MSS) satellite operating between 1.0 GHz and 3.0 GHz. The differences in frequency between the first set of signals and second set of signals is considered optimal for the transmission and receipt of communications between a computer user with the Internet. Moreover, the present invention is capable of using the present communications infrastructure dedicated to the satellite transmission of television via DBS satellites and satellite cellular communications via MSS satellites.

摘要翻译： 混合卫星通信系统向计算机用户提供通信，特别是互联网接入。 混合卫星通信系统包括卫星系统和地面通信系统。 卫星系统包括两个收发器。 第一收发器接收并发射从地面通信系统接收的第一组信号到多个用户单元。 以相反的方式，卫星系统第二收发机从用户单元接收第二频带中的第二组信号，并将这些信号发送回地面通信系统。 第一组信号（下行链路信号）的频率高于第二组信号（上行链路信号）。 优选地，第一组信号由在12.2GHz和129GHz之间的频带中的直接广播系统（DBS）卫星中继，而第二组信号由移动卫星系统（MSS）卫星在 1.0 GHz和3.0 GHz。 第一组信号和第二组信号之间的频率差异被认为是用于互联网的计算机用户之间的通信的发送和接收的最佳的。 此外，本发明能够通过经由MSS卫星的DBS卫星和卫星蜂窝通信专用于电视卫星传输的本通信基础设施。

公开(公告)号：US4991393A

公开(公告)日：1991-02-12

申请号：US372239

申请日：1989-06-26

申请人： David D. Otten ,  Robert L. Sackheim

发明人： David D. Otten ,  Robert L. Sackheim

IPC分类号： B64G1/26 ,  F02K9/58 ,  F02K9/80 ,  G05D1/08

CPC分类号： F02K9/58 ,  B64G1/26 ,  F02K9/80 ,  G05D1/0883

摘要： Apparatus and a corresponding method for controlling the attitude of a space vehicle during operation of its propulsion engines, without gimbaling of the engines. Two engines are differentially throttled, one above and one below a nominal thrust setting of the engines, in response to an error signal indicative of the difference between an actual attitude angle and a desired attitude angle. Three or four engines can be used to control attitude about two orthogonal axes, or a greater number of engines can be used for redundancy.

摘要翻译： 用于在其推进发动机的操作期间控制空间车辆的姿态的装置和相应的方法，而不发动机。 响应于指示实际姿态角和期望姿态角之间的差异的误差信号，两个发动机被差分地节流，一个在发动机的公称推力设置之上和之一下方。 可以使用三个或四个发动机来控制两个正交轴的姿态，或者可以使用更多数量的发动机进行冗余。