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1. 发明申请

US20180076998A1 COMMUNICATION CONTROL DEVICE AND COMMUNICATION CONTROL SYSTEM 审中-公开
公开(公告)号：US20180076998A1
公开(公告)日：2018-03-15
申请号：US15691954
申请日：2017-08-31
申请人： FUJITSU LIMITED
发明人： Hideki MATSUI
IPC分类号： H04L27/34 , H04B7/14 , H04L27/26
CPC分类号： H04L27/3461 , H04B7/14 , H04L27/205 , H04L27/2613 , H04L2027/0083
摘要： A generating unit that generates phase difference-added first data obtained by adding a phase change according to second data to a first signal indicating first data and a transmitting unit that transmits the phase difference-added first data are provided, and thus the first data and the second data can be transmitted through a simple configuration.

2. 发明授权

US09166680B2 Apparatus and method for measuring IQ imbalance for optical receiver 有权
标题翻译：用于测量光接收机IQ不平衡的装置和方法
公开(公告)号：US09166680B2
公开(公告)日：2015-10-20
申请号：US14027445
申请日：2013-09-16
申请人： Electronics and Telecommunications Research Institute
发明人： Chun Ju Youn , Jong-Hoi Kim , Joong-Seon Choe , Duk Jun Kim , Yong-Hwan Kwon , Eun Soo Nam
IPC分类号： H04B10/073 , H04B10/61 , H04L27/22 , H04L27/36 , H04L27/00
CPC分类号： H04B10/0731 , H04B10/613 , H04L27/223 , H04L27/364 , H04L2027/0083
摘要： Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure.
摘要翻译：提供了一种用于测量IQ不平衡的装置和方法，特别是用于测量光接收机的IQ不平衡的装置和方法。用于测量光接收机的IQ不平衡的装置包括产生光学和参考信号以向光学接收器提供光学参考信号的光产生单元，通过使用同相（I）信号产生李萨如图的图形创建单元以及响应于光学参考信号从光学接收器输出的正交相位（Q）信号，以及计算单元，参考利萨如图来计算光学接收机的IQ不平衡。

3. 发明申请

US20140105099A1 SYSTEM FOR SYNCHRONIZING A SATELLITE POINTING DEVICE 审中-公开
标题翻译：用于同步卫星指示装置的系统
公开(公告)号：US20140105099A1
公开(公告)日：2014-04-17
申请号：US14052609
申请日：2013-10-11
申请人： THALES
发明人： Marc TOURET
IPC分类号： H04B7/14 , H04L7/00
CPC分类号： H04B7/14 , G01S1/22 , H04B7/18517 , H04L7/00 , H04L2027/0083
摘要： A system for synchronizing a satellite pointing device using the transmission of a satellite synchronization signal in a set of contiguous time intervals, comprises first means of selection of at least two time intervals belonging to the set. The system also comprises second means of selection of at least two distinct transmission frequencies, each transmission frequency being associated with one of the said selected time intervals. Finally the system comprises means for modulating the synchronization signal in the selected time intervals by using the transmission frequency respectively associated with the time interval and means for demodulating the synchronization signal received.
摘要翻译：使用卫星同步信号在一组连续的时间间隔中的传输来同步卫星指向装置的系统包括选择属于该组的至少两个时间间隔的第一装置。该系统还包括选择至少两个不同传输频率的第二装置，每个传输频率与所述所选择的时间间隔之一相关联。最后，该系统包括用于通过使用分别与时间间隔相关联的传输频率在所选择的时间间隔中调制同步信号的装置和用于解调所接收的同步信号的装置。

4. 发明授权

US08537934B2 System and method for multi-carrier modulation 有权
公开(公告)号：US08537934B2
公开(公告)日：2013-09-17
申请号：US11331520
申请日：2006-01-12
申请人： Robindra B. Joshi , Jeffrey S. Putnam , Thuji S. Lin , Paul T. Yang
发明人： Robindra B. Joshi , Jeffrey S. Putnam , Thuji S. Lin , Paul T. Yang
IPC分类号： H04L27/00
CPC分类号： H04L27/152 , H04L27/2602 , H04L27/261 , H04L27/2657 , H04L27/2675 , H04L2027/0028 , H04L2027/0055 , H04L2027/0067 , H04L2027/0069 , H04L2027/0083
摘要： A method of compensating for carrier frequency and phase errors of a received multi-carrier modulated signal. The received multi-carrier signal including modulated carriers for transmitting known data and unmodulated carriers for error correction, comprising, time domain down converting the received multi-carrier signal to base-band to provide a down-converted signal, the down-converted signal including a plurality of modulated carriers for transmitting known data and unmodulated carriers for error correction. Sampling an unmodulated carrier of the down-converted signal to provide received data samples. Providing a reference signal derived from the unmodulated carrier of the down-converted signal. And, estimating phase errors from a phase difference between the ummodulated carrier and the reference signal derived from the unmodulated carrier of the down-converted signal to provide a plurality of received sample phase error estimates for each modulated carrier.

5. 发明申请

US20120219044A1 APPARATUS AND METHOD FOR CLOCK SYNCHRONIZATION IN A MULTI-POINT OFDM/DMT DIGITAL COMMUNICATIONS SYSTEM 有权
标题翻译：多点OFDM / DMT数字通信系统中时钟同步的装置和方法
公开(公告)号：US20120219044A1
公开(公告)日：2012-08-30
申请号：US13406955
申请日：2012-02-28
申请人： Daniel J. Marchok , Samir Kapoor , Ravi Chandran
发明人： Daniel J. Marchok , Samir Kapoor , Ravi Chandran
IPC分类号： H04B1/38
CPC分类号： H04W56/00 , H04L5/0007 , H04L5/0051 , H04L5/023 , H04L5/1453 , H04L27/0014 , H04L27/2607 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L2027/0055 , H04L2027/0083
摘要： A multi-point communications system is set forth herein. The communications system includes a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to a clock signal. The communications system may also include a receiver for receiving the OFDM/DMT symbols via the transmission medium. The receiver demodulates the received symbols using at least one timing signal.
摘要翻译：本文阐述了一种多点通信系统。通信系统包括用于在传输介质上经过预定数量的箱传输OFDM / DMT符号的发射机。使用至少一个定时信号来生成OFDM / DMT符号。预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。通信系统还可以包括用于经由传输介质接收OFDM / DMT符号的接收机。接收机使用至少一个定时信号来解调所接收的符号。

6. 发明授权

US07613102B2 Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system 有权
公开(公告)号：US07613102B2
公开(公告)日：2009-11-03
申请号：US11982422
申请日：2007-10-31
申请人： Daniel J. Marchok , Samir Kapoor , Ravi Chandran
发明人： Daniel J. Marchok , Samir Kapoor , Ravi Chandran
IPC分类号： H04J11/00
CPC分类号： H04W56/00 , H04L5/0007 , H04L5/0051 , H04L5/023 , H04L5/1453 , H04L27/0014 , H04L27/2607 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L2027/0055 , H04L2027/0083
摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.

7. 发明授权

US07239650B2 Apparatus and method for receiving upstream data transmissions from multiple remote transmitters 有权
标题翻译：用于从多个远程发射机接收上行数据传输的设备和方法
公开(公告)号：US07239650B2
公开(公告)日：2007-07-03
申请号：US09755339
申请日：2001-01-03
申请人： Selim Shlomo Rakib , Yehuda Azenkot
发明人： Selim Shlomo Rakib , Yehuda Azenkot
IPC分类号： H04J1/00 , H04J3/06
CPC分类号： H04W48/16 , H03M13/256 , H03M13/39 , H03M13/41 , H04B1/1027 , H04B1/707 , H04B1/7087 , H04B7/2668 , H04B2201/709709 , H04H20/77 , H04H20/78 , H04J3/0602 , H04J3/0608 , H04J3/0638 , H04J3/0682 , H04J13/00 , H04J13/004 , H04J14/007 , H04L1/006 , H04L1/16 , H04L5/023 , H04L5/026 , H04L5/06 , H04L7/041 , H04L12/2801 , H04L25/03057 , H04L25/03343 , H04L25/4921 , H04L27/0014 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L27/362 , H04L2025/03414 , H04L2027/0083 , H04L2027/0087 , H04N7/10 , H04N7/17309 , H04N7/54 , H04N21/2221 , H04N21/2408 , H04N21/4305 , H04N21/4383 , H04W24/00 , H04W56/00 , H04W74/0866
摘要： A system for bidirectional communication of digital data between a central unit and a remote unit wherein the need for tracking loops in the central unit has been eliminated. The central unit transmitter generates a master carrier and a master clock signal which are used to transmit downstream data to the remote units. The remote units recover the master carrier and master clock and synchronize local oscillators in each remote unit to these master carrier and master clock signals to generate reference carrier and clock signals for use by the remote unit receiver. These reference carrier and clock signals are also used by the remote unit transmitters to transmit upstream data to the central unit. The central unit receiver detects the phase difference between the reference carrier and clock signals from the remote units periodically and adjusts the phase of the master carrier and master clock signals for use by the central unit receiver to receive the upstream data.
摘要翻译：已经消除了用于在中央单元和远程单元之间双向通信数字数据的系统，其中在中央单元中需要跟踪环路。中央单元发射机产生主载波和主时钟信号，用于将下行数据发送到远程单元。远程单元恢复主载波和主时钟，并将每个远程单元中的本地振荡器与这些主载波和主时钟信号同步，以生成参考载波和时钟信号供远程单元接收机使用。这些参考载波和时钟信号也被远程单元发射机用于将上行数据传输到中央单元。中央单元接收机周期性地检测来自远程单元的参考载波和时钟信号之间的相位差，并调整主载波和主时钟信号的相位，供中央单元接收机使用以接收上行数据。

8. 发明授权

US07058143B2 Apparatus and a method for calculation of a correlation value corresponding to a frequency error, and a recording medium with a recorded correlation value calculation program 失效
标题翻译：用于计算与频率误差相对应的相关值的装置和方法，以及具有记录的相关值计算程序的记录介质
公开(公告)号：US07058143B2
公开(公告)日：2006-06-06
申请号：US10760425
申请日：2004-01-21
申请人： Masahiko Mutoh
发明人： Masahiko Mutoh
IPC分类号： H03D1/00 , H04B1/69
CPC分类号： H04B1/709 , H04B1/707 , H04L27/2278 , H04L2027/0046 , H04L2027/0065 , H04L2027/0083
摘要： To provide an apparatus for calculation of correlation that can take a correlation even when a frequency error is relatively large. With a 0-th degree correlator for taking, to output, a correlation between a reference signal and a measurement signal, an n-th degree correlator including an ejwt multiplier of calculating a frequency component addition signal having a frequency component added to the reference signal, and a correlation calculator for taking, to output, a correlation between the frequency component addition signal and the measurement signal, and an adder for adding an output of the 0-th degree correlator and an output of the n-th degree correlator and the output of the n-th degree correlator added at the adder do not have an increased noise/correlation value ratio, even when a frequency error is large. Accordingly, a correlation can be taken even with an increased frequency error. Another embodiment includes a conceptual block diagram in which a symbol D(o) is multiplied by a frequency.
摘要翻译：提供一种用于计算相关性的装置，即使当频率误差较大时也可以进行相关。对于用于获取，输出参考信号和测量信号之间的相关性的0度相关器，包括计算频率分量相加信号的第n次相关器，所述第n次相关器具有计算具有添加到参考信号的频率分量，以及相关计算器，用于输出频率分量相加信号和测量信号之间的相关性，以及用于将第0次相关器的输出和即使频率误差较大，第n次相关器和加法器附加的第n次相关器的输出不具有增加的噪声/相关值比。因此，即使增加的频率误差也可以进行相关。另一实施例包括其中符号D（o）乘以频率的概念框图。

9. 发明授权

US06771590B1 Communication system clock synchronization techniques 有权
标题翻译：通讯系统时钟同步技术
公开(公告)号：US06771590B1
公开(公告)日：2004-08-03
申请号：US09665225
申请日：2000-09-18
申请人： Daniel J. Marchok , Samir Kapoor , Ravi Chandran
发明人： Daniel J. Marchok , Samir Kapoor , Ravi Chandran
IPC分类号： H04J1100
CPC分类号： H04W56/00 , H04L5/0007 , H04L5/0051 , H04L5/023 , H04L5/1453 , H04L27/0014 , H04L27/2607 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L2027/0055 , H04L2027/0083
摘要： A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are generated using at least one timing signal. At least one of the predetermined number of bins includes a pilot tone sub-symbol having a frequency corresponding to the clock signal. The communications system also includes a receiver for receiving the OFDM/DMT symbols from the transmission medium. The receiver demodulates the received symbols using at least one timing signal. The receiver has a first pilot tone search mode of operation in which the receiver adjusts its timing signal to scan the frequency range of the predetermined number of bins looking for the pilot tone sub-symbol and identifies the bin including the pilot tone sub-symbol. The receiver further has a subsequent second pilot tone acquisition mode in which the receiver adjusts the timing signal to receive the identified bin containing the pilot tone sub-symbol and measures phase differences between successive pilot tone sub-symbols to thereby perform a further adjustment of the timing signal so that the pilot tone sub-symbol is received within a frequency range sufficient for subsequent phase locked loop processing thereof.
摘要翻译：本文阐述了一种多点通信系统。通信系统包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。使用至少一个定时信号来生成OFDM / DMT符号。预定数量的箱中的至少一个包括具有对应于时钟信号的频率的导频音子符号。通信系统还包括用于从传输介质接收OFDM / DMT符号的接收机。接收机使用至少一个定时信号来解调所接收的符号。接收机具有第一导频音搜索操作模式，其中接收机调整其定时信号以扫描寻找导频音子符号的预定数量的频道的频率范围，并识别包括导频音子符号的音箱。接收机还具有随后的第二导频音调获取模式，其中接收机调整定时信号以接收包含导频音符号的识别的小区，并且测量连续的导频音子符号之间的相位差，从而进一步调整定时信号，使得在对其后续的锁相环处理足够的频率范围内接收导频音子符号。

10. 发明申请

US20020037061A1 System for parameter estimation and tracking of interfering digitally modulated signals 有权
标题翻译：干扰数字调制信号的参数估计和跟踪系统
公开(公告)号：US20020037061A1
公开(公告)日：2002-03-28
申请号：US09943770
申请日：2001-08-31
申请人： BAE SYSTEMS Information
发明人： Rachel E. Learned
IPC分类号： H04B001/10
CPC分类号： H04L25/0224 , H04B1/71072 , H04L1/0054 , H04L7/042 , H04L25/0204 , H04L25/0216 , H04L25/03331 , H04L27/0014 , H04L2025/03611 , H04L2025/03796 , H04L2027/0016 , H04L2027/0061 , H04L2027/0065 , H04L2027/0067 , H04L2027/0083
摘要： In a multi-user detection system in which interfering signals are purposely allowed to exist, a parameter estimation unit is provided which utilizes signal processing for determining the channel transfer function for each received signal, including the received power, phase of the oscillator, timing offset relative to the base station clock carrier frequency offset, and number of multipaths replicas and delays for each replica, with the system providing realtime uninterrupted estimates of these parameters required by the signal separation unit.
摘要翻译：在其中有目的地允许存在干扰信号的多用户检测系统中，提供参数估计单元，其利用信号处理来确定每个接收信号的信道传递函数，包括接收功率，振荡器相位，定时偏移相对于基站时钟载波频率偏移，以及每个副本的多路径复制和延迟的数量，其中系统提供信号分离单元所需的这些参数的实时不间断估计。

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