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1. 发明授权

US06430418B1 Method and system for controlling uplink power in a satellite communication system using error leveling 有权
标题翻译：用于使用误差调整在卫星通信系统中控制上行链路功率的方法和系统
公开(公告)号：US06430418B1
公开(公告)日：2002-08-06
申请号：US09596344
申请日：2000-06-19
申请人： Dennis A. Nivens , David A. Wright , Michael S. Munoz , Gregory S. Caso , Scott A. Stephens
发明人： Dennis A. Nivens , David A. Wright , Michael S. Munoz , Gregory S. Caso , Scott A. Stephens
IPC分类号： H04B700
CPC分类号： H04B7/18543 , H04B7/18513
摘要： A method and system for controlling uplink power in a satellite communication system using error leveling is provided. The uplink power control system for a satellite communication system of a preferred embodiment of the present invention comprises a communication satellite (101) and at least one UET (105). The communication satellite (101) includes an error detector (211) and a comparator (215). The UET (105) includes a receiver (206) for receiving an error indicator signal from the comparator (215), and a power profile processor (216) for controlling the transmit power level of the particular chanslot being used by the UET in response to the error indicator. A preferred method for controlling the transmit power level of a particular chanslot assigned to a UET in a satellite communication system in accordance with the present invention includes determining an error count for an uplink data signal received from the UET in the chanslot (403), and comparing the error count to a predetermined error threshold (404). The method further includes generating an error indicator signal for the chanslot in response to the comparison (405), and controlling the transmit power level of the particular chanslot in response to the error indicator (409, 410).
摘要翻译：提供了一种使用误差校正在卫星通信系统中控制上行链路功率的方法和系统。本发明优选实施例的用于卫星通信系统的上行链路功率控制系统包括通信卫星（101）和至少一个UET（105）。通信卫星（101）包括误差检测器（211）和比较器（215）。 UET（105）包括用于从比较器（215）接收错误指示符信号的接收器（206）和用于响应于UET而被UET使用的特定车厢的发射功率电平的功率配置文件处理器（216）错误指示器。根据本发明的用于控制分配给卫星通信系统中的UET的特定信道的发射功率电平的优选方法包括确定从信道（403）中的UET接收的上行链路数据信号的误差计数，以及将误差计数与预定误差阈值进行比较（404）。所述方法还包括响应于所述比较（405）生成所述信道的错误指示符信号，以及响应于所述错误指示符（409,410）来控制所述特定信道的发射功率电平。

2. 发明授权

US5602883A Method of implementing digital phase-locked loops 失效
标题翻译：实现数字锁相环的方法
公开(公告)号：US5602883A
公开(公告)日：1997-02-11
申请号：US141797
申请日：1993-10-13
申请人： Scott A. Stephens , J. Brooks Thomas
发明人： Scott A. Stephens , J. Brooks Thomas
IPC分类号： H03L7/08 , H03D3/24
CPC分类号： H03L7/08 , H03L2207/50
摘要： In a new formulation for digital phase-locked loops, loop-filter constants are determined from loop roots that can each be selectively placed in the s-plane on the basis of a new set of parameters, each with simple and direct physical meaning in terms of loop noise bandwidth, root-specific decay rate, and root-specific damping. Loops of first to fourth order are treated in the continuous-update approximation (B.sub.L T .fwdarw.0) and in a discrete-update formulation with arbitrary B.sub.L T. Deficiencies of the continuous-update approximation in large-B.sub.L T applications are avoided in the new discrete-update formulation.
摘要翻译：在数字锁相环路的新方案中，环路滤波器常数是根据环路根确定的，每个环路根据一组新的参数选择性地放置在s平面上，每组参数具有简单直接的物理意义的环路噪声带宽，根特定衰减率和根特定阻尼。在连续更新近似（BLT - > 0）和具有任意BLT的离散更新公式中处理第一到第四阶的循环。在新的离散更新公式中，避免了大型BLT应用程序中连续更新近似的缺陷。

3. 发明授权

US06424816B1 Statistical communication link 有权
标题翻译：统计通信链接
公开(公告)号：US06424816B1
公开(公告)日：2002-07-23
申请号：US09662047
申请日：2000-09-15
申请人： Scott A. Stephens
发明人： Scott A. Stephens
IPC分类号： H04B1700
CPC分类号： H04B7/18523 , H04H60/44
摘要： A communications system (34) that monitors a state of a plurality of radios (10). In one embodiment, the communications system (34) automatically and continuously monitors the number of radios (10) tuned to each of a plurality of available radio stations. Each radio (10) generates a coded signal depending on which radio station the radio (10) is currently tuned to. The coded signal is applied to a frequency generator (32) that generates a unique frequency signal for each code that is then transmitted by the radio (10). Each radio (10) tuned to the same station would transmit the same unique frequency signal at substantially the same power level. The frequency signals transmitted by all of the radios (10) are received by a receiver (34), such as a satellite-based receiver (34), that separates the signals by frequency. The power received for each different frequency signal is then measured to give a total power output for that frequency. An estimation of the number of transmission for each different frequency signal is determined as the measured power level minus the expected receiver noise power, divided by the expected received power from a transmission from a single radio (10).
摘要翻译：一种监视多个无线电装置（10）的状态的通信系统（34）。在一个实施例中，通信系统（34）自动并连续监视调谐到多个可用无线电台中的每一个的无线电设备（10）的数量。每个无线电（10）根据当前调谐到的无线电台（10）的哪个无线电台产生编码信号。编码信号被施加到频率发生器（32），该频率发生器产生用于由无线电装置（10）发送的每个代码的唯一频率信号。调谐到同一站的每个无线电（10）将以基本上相同的功率电平发送相同的唯一频率信号。由所有无线电设备（10）发射的频率信号由接收器（34）接收，诸如基于卫星的接收机（34），其按频率分离信号。然后测量每个不同频率信号接收的功率，以给出该频率的总功率输出。每个不同频率信号的传输次数的估计被确定为测量的功率电平减去预期的接收机噪声功率，除以来自单个无线电装置（10）的传输的预期接收功率。

4. 发明授权

US5910945A Method and apparatus for synchronizing communications in a satellite based telecommunications system 失效
标题翻译：用于在基于卫星的电信系统中同步通信的方法和装置
公开(公告)号：US5910945A
公开(公告)日：1999-06-08
申请号：US643120
申请日：1996-04-30
申请人： Arthur L. Garrison , Terrence R. Smigla , Scott A. Stephens
发明人： Arthur L. Garrison , Terrence R. Smigla , Scott A. Stephens
IPC分类号： H04L7/00 , H04B7/15 , H04B7/212 , H04L7/08 , H04J3/06
CPC分类号： H04B7/2125
摘要： A method and apparatus are provided, for maintaining synchronous return and forward communications links between user terminals and earth stations communicating via a common satellite in a satellite based telecommunications system. Each user terminal maintains a closed synchronization loop with its associated earth station based on timing and frequency error offset signals received by the user terminals. The user terminals update their internal timing and frequency generators based on the received error offset signals. In an earth station sharing embodiment, one of the earth stations is designated as a master earth station while the remaining stations are designated as slave earth stations with respect to a common satellite. The slave earth stations monitor a return link between at least one user terminal and the master earth station. The slave earth stations update their internal reference timing and frequency signal generators, in order to remain synchronous with the return link between the monitored user terminal and the master earth station. The slave earth stations maintained synchronous forward links by requesting synchronization update information from the monitored user terminal. Upon receiving a request, the monitored user terminal calculates a difference in timing and frequency between frames received from the requesting slave and associated master earth stations. The user terminal transmits the difference in timing and frequency along its return link.
摘要翻译：提供了一种方法和装置，用于维持在基于卫星的电信系统中经由公共卫星进行通信的用户终端和地球站之间的同步返回和转发通信链路。每个用户终端基于由用户终端接收的定时和频率误差偏移信号来维护与其相关联的地球站的闭合同步环路。用户终端基于接收的误差偏移信号更新其内部定时和频率发生器。在地球站共享实施例中，地球站中的一个被指定为主地球站，而其余站被指定为相对于公共卫星的从地球站。从地球站监视至少一个用户终端和主地球站之间的返回链路。从地球站更新其内部参考定时和频率信号发生器，以便与受监控的用户终端和主地球站之间的返回链路保持同步。从地球站通过从被监控的用户终端请求同步更新信息来维持同步前向链路。在接收到请求时，被监视的用户终端计算从请求的从站和相关联的主地球站接收的帧之间的定时和频率的差异。用户终端沿其返回链路发送定时和频率的差异。

5. 发明授权

US5844521A Geolocation method and apparatus for satellite based telecommunications system 失效
标题翻译：用于卫星电信系统的地理位置方法和装置
公开(公告)号：US5844521A
公开(公告)日：1998-12-01
申请号：US758871
申请日：1996-12-02
申请人： Scott A. Stephens , Carl F. Reisig , Arthur L. Garrison
发明人： Scott A. Stephens , Carl F. Reisig , Arthur L. Garrison
IPC分类号： G01S5/12 , G01S19/25 , H04B7/15 , H04B7/185 , H04Q7/22 , H04Q7/24 , H04Q7/26 , H04Q7/30 , H04Q7/34 , G01S5/02
CPC分类号： H04B7/1855 , G01S5/12
摘要： A method is provided for determining the geolocation of a mobile terminal within a telecommunications satellite system. The system supports first and second forward communications links from first and second earth stations through first and second satellites to a common mobile terminal. The method includes receiving, at the mobile terminal, first and second forward link communications signals from the first and second earth stations and, based thereon, obtaining synchronization differential data. The synchronization differential data may include timing and frequency synchronization data necessary to maintain synchronization between the first and second communications at the mobile terminal. The mobile terminal transmits the synchronization differential data to the first earth station over the return link. The first earth station receives communications signals from the mobile terminal and based thereon calculates return link synchronization data. The earth station further calculates at least first and second geoposition lines, along which the mobile terminal is positioned, based on the return link synchronization data and the synchronization differential data received from the mobile terminal. The first and second geoposition lines define a point of intersection at which the mobile terminal is located.
摘要翻译：提供了一种用于确定电信卫星系统内的移动终端的地理位置的方法。该系统支持从第一和第二地球站通过第一和第二卫星到公共移动终端的第一和第二前向通信链路。该方法包括在移动终端处接收来自第一和第二地球站的第一和第二前向链路通信信号，并且基于此获得同步差分数据。同步差分数据可以包括在移动终端处保持第一和第二通信之间的同步所必需的定时和频率同步数据。移动终端通过返回链路将同步差分数据发送到第一地球站。第一地球站从移动终端接收通信信号，并基于此计算返回链路同步数据。基于从移动终端接收到的返回链路同步数据和同步差分数据，地球站进一步计算移动终端所位于的至少第一和第二地理位置线。第一和第二地理线定义移动终端所在的交点。

6. 发明授权

US06219524B1 Statistical communication link 失效
标题翻译：统计通信链接
公开(公告)号：US06219524B1
公开(公告)日：2001-04-17
申请号：US09095215
申请日：1998-06-10
申请人： Scott A. Stephens
发明人： Scott A. Stephens
IPC分类号： H04B1700
CPC分类号： H04B7/18523 , H04H60/44
摘要： A communications system (34) that monitors a state of a plurality of radios (10). In one embodiment, the communications system (34) automatically and continuously monitors the number of radios (10) tuned to each of a plurality of available radio stations. Each radio (10) generates a coded signal depending on which radio station the radio (10) is currently tuned to. The coded signal is applied to a frequency generator (32) that generates a unique frequency signal for each code that is then transmitted by the radio (10). Each radio (10) tuned to the same station would transmit the same unique frequency signal at substantially the same power level. The frequency signals transmitted by all of the radios (10) are received by a receiver (34), such as a satellite-based receiver (34), that separates the signals by frequency. The power received for each different frequency signal is then measured to give a total power output for that frequency. An estimation of the number of transmission for each different frequency signal is determined as the measured power level minus the expected receiver noise power, divided by the expected received power from a transmission from a single radio (10).
摘要翻译：一种监视多个无线电装置（10）的状态的通信系统（34）。在一个实施例中，通信系统（34）自动并连续监视调谐到多个可用无线电台中的每一个的无线电设备（10）的数量。每个无线电（10）根据当前调谐到的无线电台（10）的哪个无线电台产生编码信号。编码信号被施加到频率发生器（32），该频率发生器产生用于由无线电装置（10）发送的每个代码的唯一频率信号。调谐到同一站的每个无线电（10）将以基本上相同的功率电平发送相同的唯一频率信号。由所有无线电设备（10）发射的频率信号由接收器（34）接收，诸如基于卫星的接收机（34），其以频率分离信号。然后测量每个不同频率信号的功率，以给出该频率的总功率输出。每个不同频率信号的传输次数的估计被确定为测量的功率电平减去预期的接收机噪声功率，除以来自单个无线电装置（10）的传输的预期接收功率。

7. 发明授权

US6055277A Communication system for broadcasting to mobile users 失效
标题翻译：用于向移动用户广播的通信系统
公开(公告)号：US6055277A
公开(公告)日：2000-04-25
申请号：US864774
申请日：1997-05-29
申请人： Scott A. Stephens , Terrence R. Smigla , Donald R. Martin
发明人： Scott A. Stephens , Terrence R. Smigla , Donald R. Martin
IPC分类号： H04H20/00 , H03M13/27 , H04B7/26 , H04L1/00 , H04L1/02 , H04B15/00 , H03M13/00 , G06F11/00 , H04J3/04
CPC分类号： H04L1/0071 , H03M13/2742 , H03M13/2757 , H04L1/0009 , H04L1/0019 , H04L1/02
摘要： A communication system (10) implemented to be specifically matched to the time and spatially dependent statistics of a transmission channel (36). The communication system (10) is used for broadcasting over the channel (36) to users in a coverage region (18). The communication system (10) includes a transmitter (12) having an error correction encoder (30) and a weighted interleaver (32). The error correction encoder (30) includes a first input to receive data bits and a first output. The error correction encoder (30) expands each data bit received at said input by an encoder rate. The weighted interleaver (32) includes a second input to receive the expanded data bits and a second output. The weighted interleaver (32) has a non-uniform delay distribution between a minimum delay and a maximum delay to interleave the expanded data bits by the non-uniform delay distribution. The communication system (10) also employs a weighted link margin matched to the time and spatially dependent statistics of the transmission channel.
摘要翻译：实现为与传输信道（36）的时间和空间相关统计特别匹配的通信系统（10）。通信系统（10）用于通过信道（36）向覆盖区域（18）中的用户进行广播。通信系统（10）包括具有纠错编码器（30）和加权交织器（32）的发射机（12）。纠错编码器（30）包括用于接收数据位和第一输出的第一输入。纠错编码器（30）将在所述输入处接收到的每个数据位扩展一编码器速率。加权交织器（32）包括用于接收扩展数据比特和第二输出的第二输入。加权交织器（32）具有在最小延迟和最大延迟之间的非均匀延迟分布，以通过非均匀延迟分布对扩展的数据比特进行交织。通信系统（10）还采用与传输信道的时间和空间依赖统计匹配的加权链路余量。

8. 发明授权

US06304609B1 Communication system for broadcasting to mobile users 有权
标题翻译：用于向移动用户广播的通信系统
公开(公告)号：US06304609B1
公开(公告)日：2001-10-16
申请号：US09282362
申请日：1999-03-31
申请人： Scott A. Stephens , Terrence R. Smigla , Donald R. Martin
发明人： Scott A. Stephens , Terrence R. Smigla , Donald R. Martin
IPC分类号： H04L2700
CPC分类号： H04L1/0071 , H03M13/2742 , H03M13/2757 , H04L1/0009 , H04L1/0019 , H04L1/02
摘要： A communication system (10) implemented to be specifically matched to the time and spatially dependent statistics of a transmission channel (36). The communication system (10) is used for broadcasting over the channel (36) to users in a coverage region (18). The communication system (10) includes a transmitter (12) having an error correction encoder (30) and a weighted interleaver (32). The error correction encoder (30) includes a first input to receive data bits and a first output. The error correction encoder (30) expands each data bit received at said input by an encoder rate. The weighted interleaver (32) includes a second input to receive the expanded data bits and a second output. The weighted interleaver (32) has a non-uniform delay distribution between a minimum delay and a maximum delay to interleave the expanded data bits by the non-uniform delay distribution. The communication system (10) also employs a weighted link margin matched to the time and spatially dependent statistics of the transmission channel.
摘要翻译：实现为与传输信道（36）的时间和空间相关统计特别匹配的通信系统（10）。通信系统（10）用于通过信道（36）向覆盖区域（18）中的用户进行广播。通信系统（10）包括具有纠错编码器（30）和加权交织器（32）的发射机（12）。纠错编码器（30）包括用于接收数据位和第一输出的第一输入。纠错编码器（30）将在所述输入处接收到的每个数据位扩展一编码器速率。加权交织器（32）包括用于接收扩展数据比特和第二输出的第二输入。加权交织器（32）具有在最小延迟和最大延迟之间的非均匀延迟分布，以通过非均匀延迟分布对扩展的数据比特进行交织。通信系统（10）还采用与传输信道的时间和空间依赖统计匹配的加权链路余量。

9. 发明授权

US5924015A Power control method and apparatus for satellite based telecommunications system 失效
标题翻译：基于卫星电信系统的功率控制方法和装置
公开(公告)号：US5924015A
公开(公告)日：1999-07-13
申请号：US640198
申请日：1996-04-30
申请人： Arthur L. Garrison , Terrence R. Smigla , Scott A. Stephens
发明人： Arthur L. Garrison , Terrence R. Smigla , Scott A. Stephens
IPC分类号： H04B7/15 , H04B7/005 , H04B7/185 , H04B7/195
CPC分类号： H04W52/343 , H04B7/18543 , H04W52/346
摘要： A power control method and apparatus are provided for a satellite based telecommunications system. The system includes a power control subsystem which is operative with systems operations center for distributing available satellite power between earth stations. Each earth station includes a baseband manager which subdivides the available satellite power between subband beams emitted from the satellite. The earth station further includes beam processors which manage the power allocated to each subband within an associated beam in order to maintain a desired signal quality in a forward link between the satellite and user terminals within the associated subbands. The beam processors communicate with modems, each of which is assigned to a particular user terminal. Each modem controls the satellites transmission power in the forward link to the user terminals to maintain a desired signal-to-noise ratio at the user terminal receiver. The signal-to-noise ratio is determined by the corresponding beam processor. The subsystem further provides a dynamic power control loop between user terminals in the forward and return links to maintain a desired signal quality. The subsystem automatically controls the satellite output power level to ensure proper power emission by a satellite in connection with feeder links from multiple earth stations.
摘要翻译：为基于卫星的电信系统提供功率控制方法和装置。该系统包括功率控制子系统，其与系统操作中心一起运行，用于在地球站之间分配可用的卫星电力。每个地球站包括一个基带管理器，它将卫星发射的子带束之间的可用卫星功率细分。地球站还包括波束处理器，其管理分配给相关波束内的每个子带的功率，以便在相关子带内的卫星和用户终端之间的前向链路中保持期望的信号质量。波束处理器与调制解调器通信，每个调制解调器被分配给特定的用户终端。每个调制解调器控制到用户终端的前向链路中的卫星传输功率，以在用户终端接收机处保持期望的信噪比。信噪比由相应的波束处理器决定。该子系统还在前向链路和返回链路中的用户终端之间提供动态功率控制环路，以保持期望的信号质量。子系统自动控制卫星输出功率电平，以确保卫星与多个地球站的馈线连接相适应的发射功率。

10. 发明授权

US06519262B1 Time division multiplex approach for multiple transmitter broadcasting 失效
标题翻译：多发射机广播的时分复用方法
公开(公告)号：US06519262B1
公开(公告)日：2003-02-11
申请号：US09095486
申请日：1998-06-10
申请人： Scott A. Stephens , Terrence R. Smigla
发明人： Scott A. Stephens , Terrence R. Smigla
IPC分类号： H04B7212
CPC分类号： H04B7/18532
摘要： A time division multiplex (TDM) communication system (10) for broadcasting to users. The TDM communication system (10) includes a first transmitter (14) which broadcasts a first signal into a first coverage area (30) and a second transmitter (16) which broadcasts a second signal into a second coverage area (30) which at least partially overlaps said first coverage area (30). The first transmitter (14) is allocated a first TDM time block (88) having a first guard time (48) and the second transmitter (16) is allocated a second TDM time block (88) having a second guard time (48). The first (88) and second time blocks (88) form at least a portion of a TDM repeat interval such that the first transmitter (14) broadcasts the first signal during the first TDM time block (88) and the second transmitter (16) broadcasts the second signal during the second TDM time block (88).
摘要翻译：一种用于广播给用户的时分复用（TDM）通信系统（10）。 TDM通信系统（10）包括将第一信号广播到第一覆盖区域（30）的第一发射机（14）和将第二信号广播到第二覆盖区域（30）的第二发射机（16），所述第二发射机至少部分地重叠所述第一覆盖区域（30）。第一发射机（14）被分配具有第一保护时间（48）的第一TDM时间块（88），并且第二发射机（16）被分配具有第二保护时间（48）的第二TDM时间块（88）。第一（88）和第二时间块（88）形成TDM重复间隔的至少一部分，使得第一发射机（14）在第一TDM时间块（88）和第二发射机（16）期间广播第一信号，在第二TDM时间块（88）期间广播第二信号。

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