公开(公告)号：US20090034654A1

公开(公告)日：2009-02-05

申请号：US11882643

申请日：2007-08-03

申请人： Thomas Inukai ,  Anil Agarwal ,  Mark Miller

发明人： Thomas Inukai ,  Anil Agarwal ,  Mark Miller

IPC分类号： H04L27/00

CPC分类号： H04B7/2125 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0022 ,  H04W56/00

摘要： A communication system having a first station and a second station in communication over a wireless communications link. The first station is operative during a communication session to assemble signals from multiple data sources into a common data stream and to transmit the data stream as frame-based communication signals to the second station. The first station comprises a dynamically configurable multiplexer that is operative during a communication session (1) to generate the common data stream by multiplexing the signals in accordance with a plurality of control parameters and assemble said signals according to frames, (2) to dynamically modify the plurality of control parameters in accordance with changes in wireless link conditions and (3) to generate control signals identifying modifications to the control parameters. The first station is operative to transmit to said second station the signals assembled according to frames and the control signals

摘要翻译： 一种具有通过无线通信链路进行通信的第一站和第二站的通信系统。 第一站在通信会话期间操作以将来自多个数据源的信号组合成公共数据流，并将数据流作为基于帧的通信信号发送到第二站。 第一站包括动态可配置的多路复用器，其在通信会话（1）期间操作以通过根据多个控制参数复用所述信号来生成公共数据流，并且根据帧组合所述信号，（2）动态地修改 所述多个控制参数根据无线链路条件的变化，以及（3）产生识别对所述控制参数的修改的控制信号。 第一站可操作地向所述第二站发送根据帧和控制信号组装的信号

公开(公告)号：US4792963A

公开(公告)日：1988-12-20

申请号：US388005

申请日：1982-06-14

申请人： S. Joseph Campanella ,  Thomas Inukai

发明人： S. Joseph Campanella ,  Thomas Inukai

IPC分类号： H04B7/204 ,  H04L7/033 ,  H03K1/17 ,  H04L7/00

CPC分类号： H04B7/2048 ,  H04L7/0331

摘要： A satellite clock system in which the frequency of the onboard satellite clock, which is implemented as a relatively high uncertainty voltage-controlled oscillator, is corrected in accordance with a high-stability, low-uncertainty terrestrial clock. Metering bursts are transmitted from the earth station to the satellite where portions of the metering bursts are truncated due to misalignment between the bursts and the synchronization windows timed by the onboard oscillator of the satellite. The patterns of the received bursts which are re-transmitted by the satellite are compared with a stored pattern and a phase shift value determined in accordance with the number of incorrect comparisons. The phase error measurement value is utilized to control a programmable divider connected between the high-stability, low-uncertainty oscillator and the burst transmitter to thus provide a short-term correction. The output values from the phase error measurement are accumulated over a sidereal day period to provide a sidereal day phase shift value. The accumulated value of the sidereal day phase shifts is summed with all previous daily values to compute a cumulative phase shift from the beginning of the system operation. The current and cumulative phase shift values are then summed and divided by a period of one sidereal day to produce an actual phase correction for the next sidereal day. The actual daily frequency correction is computed by summing all values of the sidereal day frequency correction and telemetering this value to the satellite. Alternately, the accumulation of the frequency corrections can be performed onboard the satellite.

摘要翻译： 一种卫星时钟系统，其中根据高稳定性，低不确定性的地面时钟校正被实现为相对高的不确定性压控振荡器的车载卫星时钟的频率。 计量脉冲串从地球站传输到卫星，其中由于由卫星的机载振荡器定时的脉冲串和同步窗口之间的未对准，计量脉冲串的部分被截断。 由卫星重新发送的接收脉冲串的模式与存储的模式和根据不正确比较的数量确定的相移值进行比较。 相位误差测量值用于控制连接在高稳定性，低不确定度振荡器和脉冲串发射机之间的可编程分频器，从而提供短期校正。 来自相位误差测量的输出值在恒星白天期间累积以提供恒星白天相移值。 恒星相移的累积值与所有以前的每日值相加，以计算从系统操作开始的累积相移。 然后将当前和累积相移值相加并除以一个恒星天的周期，以产生下一个恒星日的实际相位校正。 实际的每日频率校正是通过将恒星频率校正和遥测该值的所有值相加到卫星来计算的。 或者，可以在卫星上执行频率校正的累积。

公开(公告)号：US06529485B1

公开(公告)日：2003-03-04

申请号：US09331406

申请日：1999-08-26

申请人： Anil K. Agarwal ,  Thomas Inukai

发明人： Anil K. Agarwal ,  Thomas Inukai

IPC分类号： H04B7212

CPC分类号： H04B7/18543 ,  H04B7/18513 ,  H04B7/2125 ,  H04L1/0025 ,  H04L1/0026

摘要： A method for generating a Doppler-free local clock in a communications network having a master reference terminal (400) and a terminal (200) exchanging reference and management bursts, includes steps for determining a transmit timing correction value responsive to the management burst received by the master reference terminal (400), determining a receive timing correction value responsive to the reference burst received by the terminal (200), and adjusting the frequency of a clock responsive to both the transmit timing correction value and the receive timing correction value to thereby generate the Doppler-free local clock.

摘要翻译： 一种用于在具有主参考终端（400）和交换参考和管理脉冲串的终端（200）的通信网络中产生无多普勒本地时钟的方法，包括以下步骤：响应于所接收的管理突发确定发射定时校正值 所述主参考终端（400）响应于由所述终端（200）接收的所述参考突发确定接收定时校正值，以及响应于所述发射定时校正值和所述接收定时校正值来调整时钟的频率，从而 产生无多普勒的本地时钟。

公开(公告)号：US4602375A

公开(公告)日：1986-07-22

申请号：US387582

申请日：1982-06-11

申请人： Thomas Inukai

发明人： Thomas Inukai

IPC分类号： H04B7/204 ,  H04L7/033 ,  H04L7/04 ,  H04B7/185

CPC分类号： H04B7/2048 ,  H04L7/042 ,  H04L7/0334 ,  H04L7/046

摘要： In an on-board satellite clock correction system of the type wherein phase errors between the satellite clock and a ground-based clock are determined and a clock correction value sent to the satellite, the clock correction value is determined by curve-fitting the determined phase errors in accordance with a polynomial function, updating the polynomial function coefficients so as to minimize discrepancy between the determined phase errors and those according to the polynomial function, predicting a clock drift in accordance with the polynomial function and calculating an error correction value in accordance with the predicted clock drift.

摘要翻译： 在确定了卫星时钟和基于地面的时钟之间的相位误差并且发送到卫星的时钟校正值的类型的车载卫星时钟校正系统中，通过对所确定的相位进行曲线拟合来确定时钟校正值 根据多项式函数的误差，更新多项式函数系数，以使所确定的相位误差与根据多项式函数的差异最小化，根据多项式函数预测时钟漂移，并根据多项式函数计算误差校正值 预测时钟漂移。

公开(公告)号：US20070268843A1

公开(公告)日：2007-11-22

申请号：US11751824

申请日：2007-05-22

申请人： Benjamin Pontano ,  Thomas Inukai

发明人： Benjamin Pontano ,  Thomas Inukai

IPC分类号： H04L12/28

CPC分类号： H04B1/707 ,  H04L5/0017 ,  H04L25/03834

摘要： The present disclosure provides for methods and systems for segmented spread-spectrum communication according to one embodiment of the invention. Segmented spread-spectrum communication may include replicating a signal, spreading each of the replicated signals with a code, and modulating each of the coded signals within a unique spectral segment. The spectral segments may be uniform or nonuniform in width and may or may not be contiguous within the spectrum. The receive processing may include interference detection within a spectral segment. In response to detected interference, spectral segments may be discarded, a signal gain of each segment may be adjusted according to the level of interference, and/or selected segments may be adjusted according to the level of interference. Moreover, at the receiver a number of transmitted spectral segments may be combined. As a further embodiment, a plurality of signals may spread among a plurality of spectral segments.

摘要翻译： 本公开提供了根据本发明的一个实施例的用于分段扩频通信的方法和系统。 分段扩频通信可以包括复制信号，用代码扩展每个复制信号，以及调制唯一频谱段内的每个编码信号。 光谱段的宽度可以是均匀的或不均匀的，并且在光谱内可以是或也可以不是连续的。 接收处理可以包括频谱段内的干扰检测。 响应于检测到的干扰，可以丢弃频谱段，可以根据干扰电平来调整每个段的信号增益，和/或可以根据干扰电平来调整所选择的段。 此外，在接收机处，可以组合多个传输的频谱段。 作为另一实施例，多个信号可以在多个频谱段之间分布。

公开(公告)号：US06459898B1

公开(公告)日：2002-10-01

申请号：US09443465

申请日：1999-11-19

申请人： Ferit Yegenoglu ,  Thomas Inukai

发明人： Ferit Yegenoglu ,  Thomas Inukai

IPC分类号： H04B7185

CPC分类号： H04B7/18597

摘要： In a satellite network with on-board switching and bandwidth on demand, traffic monitoring is required to facilitate billing data collection and to avoid congestion at the satellite. In addition to traffic monitoring, performance monitoring is necessary to quickly respond to link degradation or possible equipment anomalies. Monitoring terminals specially equipped with traffic measuring and policing and link performance measuring capabilities are used to monitor traffic and performance. The monitoring terminal is located in each satellite beam to perform the monitoring functions for that beam. The monitoring terminals are low-cost terminals that receive down-link traffic in their respective beam, and record statistics on a per transmit-terminal or per virtual connection basis. Records are periodically transmitted to a central location where they are processed for billing, enforcing traffic contracts, and taking actions against link degradations.

摘要翻译： 在具有车载切换和带宽需求的卫星网络中，需要进行流量监控以便于收集数据并避免卫星拥塞。 除了交通监控之外，性能监控还需要快速响应链路降级或可能的设备异常。 特别配备流量测量和监管和链路性能测量功能的监控终端用于监控流量和性能。 监控终端位于每个卫星光束中，以执行该光束的监视功能。 监控终端是在其各自的波束中接收下行链路业务的低成本终端，并且在每个发射终端或每个虚拟连接的基础上记录统计信息。 记录被周期性地传送到中央位置，在那里它们被处理用于计费，执行交通合同，并对链路退化采取行动。