公开(公告)号：US07633895B2

公开(公告)日：2009-12-15

申请号：US10428953

申请日：2003-05-01

申请人： Leonard N. Schiff ,  Ahmad Jalali

发明人： Leonard N. Schiff ,  Ahmad Jalali

IPC分类号： H04B7/212

CPC分类号： H04B7/216 ,  H04B7/18543 ,  H04B2201/70702 ,  Y02D70/446

摘要： Orthogonal CDMA (OCDMA) in the return link of a satellite based communications system provides improved bandwidth efficiencies; increased ability to overcome channel degrading phenomenon; reduced transmission power; or various combinations thereof. By achieving code synchronization needed for advantageous use of OCDMA in the return link of a satellite based communication system, a plurality of terminals, each with a unique time slot/code channel assignment, may transmit concurrently, with the same, or lower, aggregate power as would be used by a single terminal using TDMA. Use of OCDMA in the return link allows one or more terminals, each in a common beam and assigned a common time slot, to transmit at a higher transmission power to overcome channel degradation effects. The ability to allow for higher transmission power for a particular terminal can increase the effective data rate for that terminal by enabling the use of a higher order modulation technique.

摘要翻译： 基于卫星通信系统的返回链路中的正交CDMA（OCDMA）提供了改进的带宽效率; 增强克服渠道退化现象的能力; 降低发射功率; 或其各种组合。 通过实现在基于卫星的通信系统的返回链路中有利地使用OCDMA所需的代码同步，每个具有唯一的时隙/码信道分配的终端可以以相同或更低的总功率同时发送 如将由使用TDMA的单个终端使用的那样。 在返回链路中使用OCDMA允许一个或多个终端，每个在公共波束中并且分配公共时隙，以更高的发射功率发射以克服信道劣化效应。 允许特定终端的较高发射功率的能力可以通过使用更高阶调制技术来增加该终端的有效数据速率。

公开(公告)号：US07933215B2

公开(公告)日：2011-04-26

申请号：US10860883

申请日：2004-06-03

申请人： Leonard N. Schiff ,  Ahmad Jalali ,  Wei Shi

发明人： Leonard N. Schiff ,  Ahmad Jalali ,  Wei Shi

IPC分类号： H04L12/26

CPC分类号： H04B7/18513 ,  H04B7/18543

摘要： Methods and apparatus are disclosed to provide orthogonal multiple access communication in a return link of a satellite communication system. In one embodiment, a closed loop control of a transmit parameter associated with transmission of signals may be performed. In addition, changes in motion of a terminal are monitored such that an open loop control of the transmit parameter is performed, if the detected change meets a certain threshold. For example, an open control is performed if an abrupt or sudden motion is detected.

摘要翻译： 公开了在卫星通信系统的返回链路中提供正交多址通信的方法和装置。 在一个实施例中，可以执行与信号传输相关联的传输参数的闭环控制。 此外，如果检测到的变化满足一定阈值，则监视终端的运动变化，使得执行发​​送参数的开环控制。 例如，如果检测到突然或突然的运动，则执行打开控制。

公开(公告)号：US08284826B2

公开(公告)日：2012-10-09

申请号：US11934684

申请日：2007-11-02

申请人： Leonard N. Schiff ,  William G. Ames

发明人： Leonard N. Schiff ,  William G. Ames

IPC分类号： H04B3/46

CPC分类号： H04H20/18 ,  H04H20/67

摘要： Synchronization of satellite and terrestrial broadcasts in a shared frequency arrangement is use in order to facilitate simultaneous reception of the broadcasts. A delay value is adjusted based on a synchronization between a first terrestrial broadcast and a satellite broadcast, and a delay value for a second terrestrial broadcast is adjusted based on a synchronization between the second terrestrial broadcast, the first terrestrial broadcast and the satellite broadcast. The adjustment of the relative delay values provides an improved reception pattern based on receipt of a shared frequency communication from multiple sources by improving a signal quality factor within at least selected regions of the coverage areas in which the relative delay values permit synchronization. This allows for synchronization lock between multiple substantially simultaneous broadcasts as determined by a cyclic prefix window of the broadcasts in overlapping coverage areas, useful for simultaneous satellite and terrestrial broadcasts using an OFDM format.

摘要翻译： 使用共享频率安排中的卫星和地面广播的同步，以便于同时接收广播。 基于第一地面广播和卫星广播之间的同步来调整延迟值，并且基于第二地面广播，第一地面广播和卫星广播之间的同步来调整用于第二地面广播的延迟值。 相对延迟值的调整通过改善相对延迟值允许同步的覆盖区域的至少所选区域内的信号质量因子，基于从多个源接收到共享频率通信来提供改进的接收模式。 这允许在重叠覆盖区域中的广播的循环前缀窗口确定的多个基本上同时的广播之间的同步锁定，对于使用OFDM格式的同时卫星和地面广播是有用的。

公开(公告)号：US06208858B1

公开(公告)日：2001-03-27

申请号：US09120857

申请日：1998-07-21

申请人： Franklin P. Antonio ,  Gene W. Marsh ,  Richard A. Stewart ,  Marie M. Bjerede ,  Ananthanarayanan Chockalingam ,  Arthur S. Kerns ,  Brian Butler ,  Matthew S. Grob ,  James T. Determan ,  Douglas Grover ,  Leonard N. Schiff ,  William G. Ames

发明人： Franklin P. Antonio ,  Gene W. Marsh ,  Richard A. Stewart ,  Marie M. Bjerede ,  Ananthanarayanan Chockalingam ,  Arthur S. Kerns ,  Brian Butler ,  Matthew S. Grob ,  James T. Determan ,  Douglas Grover ,  Leonard N. Schiff ,  William G. Ames

IPC分类号： H04Q720

CPC分类号： H04B7/18534

摘要： A method for reducing call dropping rates in a multi-beam communication system. The multi-beam communication system includes a user terminal, a gateway, and a plurality of beam sources, where each beam source projects a plurality of beams, and where a communication link between the user terminal and the gateway is established on one or more beams. The method according to the present invention relies on a messaging protocol between the gateway and the user terminal. Based on messages sent from the user terminal to the gateway, preferably on a preselected periodic basis, the gateway can determine the more desirable beam(s) for transmitting data or information to the user terminal. The messages sent from the user terminal to the gateway contain values representing beam strengths as measured at the user terminal. The gateway uses the user terminal measured beam strengths to select the beams that should be used for transmitting data or information to the user terminal. The beams that should be used are the beams that if used will decrease the call dropping rates and provide a desired level of beam source diversity.

摘要翻译： 一种用于在多光束通信系统中降低呼叫丢弃率的方法。 多波束通信系统包括用户终端，网关和多个波束源，其中每个波束源投射多个波束，并且在一个或多个波束上建立用户终端和网关之间的通信链路 。 根据本发明的方法依赖于网关与用户终端之间的消息协议。 基于从用户终端发送到网关的消息，优选地以预选的周期性基础，网关可以确定用于向用户终端发送数据或信息的更理想的波束。 从用户终端发送到网关的消息包含表示在用户终端测量的波束强度的值。 网关使用用户终端测量的光束强度来选择应用于向用户终端发送数据或信息的光束。 应该使用的波束是如果使用的波束将降低呼叫丢弃率并提供期望的波束源分集水平。

公开(公告)号：US06714780B1

公开(公告)日：2004-03-30

申请号：US09722001

申请日：2001-06-12

申请人： Franklin P. Antonio ,  Gene W. Marsh ,  Richard A. Stewart ,  Marie M. Bjerede ,  Ananthanarayanan Chockalingam ,  Arthur S. Kerns ,  Brian Butler ,  Matthew S. Grob ,  James T. Determan ,  Douglas Grover ,  Leonard N. Schiff ,  William G. Ames

发明人： Franklin P. Antonio ,  Gene W. Marsh ,  Richard A. Stewart ,  Marie M. Bjerede ,  Ananthanarayanan Chockalingam ,  Arthur S. Kerns ,  Brian Butler ,  Matthew S. Grob ,  James T. Determan ,  Douglas Grover ,  Leonard N. Schiff ,  William G. Ames

IPC分类号： H04Q720

CPC分类号： H04B7/18534

摘要： A method for reducing call dropping rates in a multi-beam communication system. The multi-beam communication system includes a user terminal, a gateway, and a plurality of beam sources, where each beam source projects a plurality of beams, and where a communication link between the user terminal and the gateway is established on one or more beams. The method according to the present invention relies on a messaging protocol between the gateway and the user terminal. Based on messages sent from the user terminal to the gateway, preferably on a preselected periodic basis, the gateway can determine the more desirable beam(s) for transmitting data or information to the user terminal. The messages sent from the user terminal to the gateway contain values representing beam strengths as measured at the user terminal. The gateway uses the user terminal measured beam strengths to select the beams that should be used for transmitting data or information to the user terminal. The beams that should be used are the beams that if used will decrease the call dropping rates and provide a desired level of beam source diversity.

摘要翻译： 一种用于在多光束通信系统中降低呼叫丢弃率的方法。 多波束通信系统包括用户终端，网关和多个波束源，其中每个波束源投射多个波束，并且在一个或多个波束上建立用户终端和网关之间的通信链路 。 根据本发明的方法依赖于网关与用户终端之间的消息协议。 基于从用户终端发送到网关的消息，优选地以预选的周期性基础，网关可以确定用于向用户终端发送数据或信息的更理想的波束。 从用户终端发送到网关的消息包含表示在用户终端测量的波束强度的值。 网关使用用户终端测量的光束强度来选择应用于向用户终端发送数据或信息的光束。 应该使用的波束是如果使用的波束将降低呼叫丢弃率并提供期望的波束源分集水平。

公开(公告)号：US06339611B1

公开(公告)日：2002-01-15

申请号：US09435941

申请日：1999-11-09

申请人： Franklin P. Antonio ,  Leonard N. Schiff ,  William G. Ames

发明人： Franklin P. Antonio ,  Leonard N. Schiff ,  William G. Ames

IPC分类号： H04B169

CPC分类号： H04B7/18534 ,  H04B7/10

摘要： The information signals are transferred to end users, customers, or service subscribers using at least two signal sources, generally satellites, and polarized radiation. Two polarization modes are employed, with the preferred modes being left-hand and right-hand circularly polarized radiation, although other polarization modes may be employed. The total number of channels can be divided among the polarization modes and transferred to end users either through the use of polarization switching in the receivers to selectively switch between the satellites, or by switching elements in the satellites (sources) to switch between polarization modes used for transmission.

摘要翻译： 使用至少两个信号源（通常是卫星）和偏振辐射将信息信号传送给终端用户，客户或服务订户。 采用两种偏振模式，其中优选的模式是左旋和右旋圆偏振辐射，尽管可以采用其它偏振模式。 信道的总数可以在极化模式之间划分并且通过使用接收器中的偏振切换来选择性地在卫星之间切换，或者通过卫星（源）中的开关元件在所使用的偏振模式之间切换来传送给终端用户 用于传输。

公开(公告)号：US08744344B2

公开(公告)日：2014-06-03

申请号：US12126337

申请日：2008-05-23

申请人： Leonard N. Schiff ,  David S. Miller

发明人： Leonard N. Schiff ,  David S. Miller

IPC分类号： H04B7/185

CPC分类号： H04B7/18519

摘要： A satellite communication system for providing communications between user terminals and gateways constituted with m primary satellites. In one embodiment, n back up satellites are also provided. Further, each satellite, primary or back-up, is equipped to project N/m beams onto and across an area in a loosely-packed array manner. M of the m primary and n back-up satellites collectively create N beam spots to cover the area. Moreover, each sub-area is covered by a beam spot separated from another sub-area covered by another beam spot by one beam width. Each satellite is also equipped to facilitate communication over 1 of m band of frequencies on one beam. AS a result, any of the m primary satellites may be efficiently replaced on demand by a selected one of the n back-up satellites. The gateways and user terminals are configured to communicate signals through or with both or either the primary and back-up satellites.

摘要翻译： 一种卫星通信系统，用于在由m个主卫星构成的用户终端和网关之间提供通信。 在一个实施例中，还提供n个备用卫星。 此外，每个卫星，主要或备用装备，以松散排列的方式将N / m波束投射到一个区域上并跨越一个区域。 m个主要和n个后备卫星的M共同创造N个光束点以覆盖该区域。 此外，每个子区域被从另一个光束点覆盖一个光束宽度的另一个子区域分离的光束点覆盖。 每个卫星还配备了一个波束上的m个频带范围内的通信。 结果，可以根据需要由n个备用卫星中的所选择的一个有效地替换任何一个m个主卫星。 网关和用户终端被配置为通过或与主卫星和后备卫星两者或任一者传送信号。

公开(公告)号：US08121536B2

公开(公告)日：2012-02-21

申请号：US10625167

申请日：2003-07-22

申请人： Leonard N. Schiff ,  David S. Miller

发明人： Leonard N. Schiff ,  David S. Miller

IPC分类号： H04B7/185

CPC分类号： H04B7/18532 ,  Y02D70/446

摘要： A quality measure, such as a signal-to-noise ratio, of a signal arriving at a gateway for a return link is used to adjust a data rate for the link. The return link is transferred from a terminal to the gateway through a satellite, and shared by a number of user terminals at any given time, including the terminal for which the data rate is adjusted. The terminals sharing the link have a certain interference relationship. Adjusting a data rate for a message sent from one or more terminals through the return link in the presence of signal degradation or power loss does not appreciably change the interference relationship among the plurality of terminals.

摘要翻译： 使用到达用于返回链路的网关的信号的质量度量（例如信噪比）来调整链路的数据速率。 返回链路通过卫星从终端传送到网关，并在任何给定时间由多个用户终端共享，包括调整数据速率的终端。 共享链路的终端具有一定的干扰关系。 在存在信号劣化或功率损耗的情况下，通过返回链路调整从一个或多个终端发送的消息的数据速率，不会明显改变多个终端之间的干扰关系。

公开(公告)号：US08107436B2

公开(公告)日：2012-01-31

申请号：US12621390

申请日：2009-11-18

申请人： Leonard N. Schiff

发明人： Leonard N. Schiff

IPC分类号： H04W4/00 ,  H04B7/185

CPC分类号： H04B7/18513 ,  H04B7/18534

摘要： Communication diversity using a plurality of satellites is disclosed. The satellites can support multiple regions corresponding to multiple satellite beams. Each satellite can support all regions in the reverse direction and each satellite can be designated as a primary satellite for one of the multiple regions corresponding to one of the multiple satellite beams. Each satellite can receive from any of the regions reverse link signals broadcast by, for example, a mobile station. Each satellite can communicate the received reverse link signals to, for example, a base station or gateway where the signals can be combined to increase signal quality. A mobile station receives forward link signals from the primary satellite and monitors a signal quality from the primary satellite and from a secondary satellite. If the signal quality from the primary satellite drops below a threshold value, the communication signal is transferred to the secondary satellite.

摘要翻译： 公开了使用多个卫星的通信分集。 卫星可以支持对应于多个卫星波束的多个区域。 每个卫星可以支持相反方向的所有区域，并且每个卫星可以被指定为对应于多个卫星波束之一的多个区域之一的主卫星。 每个卫星可以从任何区域接收由例如移动台广播的反向链路信号。 每个卫星可以将接收到的反向链路信号传送到例如基站或网关，其中可以组合信号以增加信号质量。 移动台接收来自主卫星的前向链路信号，并监测来自主卫星和辅助卫星的信号质量。 如果来自主卫星的信号质量低于阈值，则通信信号被传送到辅助卫星。

公开(公告)号：US07920543B2

公开(公告)日：2011-04-05

申请号：US11620630

申请日：2007-01-05

申请人： Leonard N. Schiff ,  David S. Miller ,  Sumantra Chakravarty

发明人： Leonard N. Schiff ,  David S. Miller ,  Sumantra Chakravarty

IPC分类号： H04J3/24

CPC分类号： H04W52/46 ,  H04W4/12 ,  H04W64/00 ,  H04W88/04

摘要： A broadband terrestrial message delivery system includes a plurality of wireless communication devices (WCDs), each including a receiver and transmitter, the WCDs capable of not only receiving messages destined for a subscriber associated with a particular WCD, but further capable of acting as a relay point to move messages to and from other subscribers. Message diffusion includes relaying the messages in accordance with all earmark that specifies both the total number of times (N) a message is to be repeated, and the number of times (i) the received message has already been repeated. Methods of improving the spectral efficiency of such a message diffusion architecture include adding a propagation ring width control parameter (J) to the earmark such that a WCD acting in relay mode transmits no more than J repetitions of the message; and providing sectorization such that several sectorized message pathways in a cell may be simultaneously active.

摘要翻译： 宽带地面消息传送系统包括多个无线通信设备（WCD），每个无线通信设备（WCD）包括接收机和发射机，该WCD能够不仅接收去往与特定WCD相关联的订户的消息，而且能够充当中继 指向其他用户移动消息。 消息扩散包括根据指定要重复的消息的总次数（N）的所有指定项目以及已经重复接收到的消息的次数（i）来中继消息。 提高这种消息扩散架构的频谱效率的方法包括将传播环宽度控制参数（J）添加到指定项目，使得以中继模式行动的WCD传送不超过该消息的J个重复; 并且提供扇区化，使得小区中的几个分段消息路径可以同时活动。