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    Method and apparatus providing decentralized, goal-orientated adaptive learning in an adaptive orthogonal frequency division multiplex communication system
    2.
    发明申请
    Method and apparatus providing decentralized, goal-orientated adaptive learning in an adaptive orthogonal frequency division multiplex communication system 有权
    在自适应正交频分复用通信系统中提供分散，面向目标的自适应学习的方法和装置

    公开(公告)号：US20050128935A1

    公开(公告)日：2005-06-16

    申请号：US10732066

    申请日：2003-12-10

    Applicant: Clive Tang ,  Victor Stolpman

    Inventor： Clive Tang ,  Victor Stolpman

    IPC: H04J20060101 ,  H04J11/00 ,  H04L1/00 ,  H04L27/26

    CPC classification number: H04L1/0009 ,  H04L1/0003 ,  H04L1/0021 ,  H04L27/2601

    Abstract: Disclosed is an OFDM communications system and a method of operating the OFDM communications system. The system includes an OFDM transmitter for transmitting data over a plurality of OFDM sub-channels, where the OFDM transmitter has a plurality of modulators of different types. The system further includes an OFDM receiver for receiving the data from the plurality of OFDM sub-channels, where the OFDM receiver has a plurality of corresponding demodulators of the different types. The system further includes, in accordance with this invention, an adaptive learning automata that contains a group or team of independent, decentralized automaton operating in accordance with a game theory-based approach. Each of the plurality of automaton are responsible for managing one MCS switching threshold value so as to maximize at least one selected performance criterion. The OFDM transmitter is responsive to the MCS switching thresholds for selecting an appropriate one or ones of said modulators for modulating the data for various ones of the sub-channels.

    Abstract translation: 公开了OFDM通信系统和操作OFDM通信系统的方法。 该系统包括用于在多个OFDM子信道上发送数据的OFDM发射机，其中OFDM发射机具有多个不同类型的调制器。 该系统还包括用于从多个OFDM子信道接收数据的OFDM接收机，其中OFDM接收机具有多个不同类型的对应解调器。 该系统还包括根据本发明的自适应学习自动机，其包含根据基于游戏理论的方法操作的独立的分散式自动机的组或团队。 多个自动机中的每一个负责管理一个MCS切换阈值，以使至少一个所选择的性能标准最大化。 OFDM发射机响应于MCS切换阈值，用于选择用于调制各个子信道的数据的所述调制器中适当的一个或多个调制器。

    Synchronization in a broadcast OFDM system using time division multiplexed pilots
    3.
    发明申请
    Synchronization in a broadcast OFDM system using time division multiplexed pilots 审中-公开
    使用时分复用导频的广播OFDM系统中的同步

    公开(公告)号：US20050063298A1

    公开(公告)日：2005-03-24

    申请号：US10931324

    申请日：2004-08-31

    Applicant: Fuyun Ling ,  Alok Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Rajiv Vijayan ,  Bojan Vrcelj

    Inventor： Fuyun Ling ,  Alok Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Rajiv Vijayan ,  Bojan Vrcelj

    IPC: H04B3/10 ,  H04J20060101 ,  H04J1/16 ,  H04J11/00

    CPC classification number: H04L27/2657 ,  H04L5/005 ,  H04L25/022 ,  H04L27/2613 ,  H04L27/2662 ,  H04L27/2665 ,  H04L2027/003

    Abstract: In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least S1 identical pilot-1 sequences of length L1 and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2>L1, S1·L1=N, and S2·L2=N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot-1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).

    Abstract translation: 在OFDM系统中，发射机在第一组子带上广播第一TDM导频，随后在每帧中的第二组子带上接收第二TDM导频。 每个组中的子带从N个总子带中选出，使得（1）第一TDM导频的OFDM符号包含长度为L1的至少S1个相同的导频1序列，以及（2）第二TDM导频的OFDM符号包含 至少S2个长度为L2的导频-2序列，其中L2> L1，S1.L1 = N，S2.L2 = N。 发射机还可以广播FDM导频。 接收机处理第一TDM导频以获得帧定时（例如，通过执行不同导频-1序列之间的相关）并且进一步处理第二TDM导频以获得符号定时（例如，通过检测导出的信道脉冲响应估计的开始 从第二TDM导频）。

    Process and device for timing recovery
    5.
    发明授权
    Process and device for timing recovery 失效
    用于定时恢复的过程和设备

    公开(公告)号：US5426672A

    公开(公告)日：1995-06-20

    申请号：US920433

    申请日：1992-08-14

    Applicant: Wilhelm Volejnik

    Inventor： Wilhelm Volejnik

    IPC: H03L7/093 ,  H04J20060101 ,  H04J3/06 ,  H04J3/07 ,  H04L7/033 ,  H04L7/00 ,  H04L25/36 ,  H04L25/40

    CPC classification number: H04J3/076 ,  H03L7/093

    Abstract: In byte-wise stuffing of synchronous signals of the synchronous digital multiplex hierarchy, jitter which complicates timing recovery occurs with phase-jumps of 8 UI. A possibility is therefore sought of converting jitter into drift. This is achieved using a phase-locked loop (PLL) in which a phase-jump compensator (7) is inserted between the output (4) of a phase discriminator (3) and the input (5) of an oscillator (6). The phase-jump compensator converts an input correcting quantity (K.sub.e) into an output correcting quantity (K.sub.a). When no stuffing is being performed, the input correcting quantity (K.sub.e) leaves the phase-jump compensator (7) unchanged (a1, b1). If positive stuffing (+St) is being performed, the pulses, thereby lengthened, of the input correcting quantity (K.sub.e) are firstly shortened to the standard duration (x1) and subsequently lengthened in a stepwise fashion to the original duration (c1, d1). In the case of negative stuffing (-St), by contrast, the pulses, thereby shortened, of the input correcting quantity (K.sub.e) are firstly lengthened to the standard duration (x 1) and then once again shortened in a stepwise fashion (e 1, f1).

    Abstract translation: PCT No.PCT / EP91 / 02090 Sec。 371日期：1992年8月14日 102（e）日期1992年8月14日PCT 1991年12月4日PCT PCT。 出版物WO91 / 12678 日期为1991年8月22日。在同步数字多路复用层次的同步信号的字节式填充中，使用8 UI的相位跳跃发生复杂的定时恢复抖动。 因此，寻求将抖动转换为漂移的可能性。 这是通过锁相环（PLL）实现的，其中相位跳变补偿器（7）插入在相位鉴别器（3）的输出（4）和振荡器（6）的输入端（5）之间。 相位跳变补偿器将输入校正量（Ke）转换为输出校正量（Ka）。 当不进行填充时，输入校正量（Ke）使相位跳变补偿器（7）保持不变（a1，b1）。 如果进行了正填充（+ St），则首先将输入校正量（Ke）的脉冲（因此延长）缩短到标准持续时间（x1），然后以逐步的方式延长到原始持续时间（c1，d1 ）。 在负填充（-St）的情况下，输入校正量（Ke）的脉冲（因此缩短）首先被延长到标准持续时间（x 1），然后再次以逐步方式缩短（e 1，f1）。

    Proximity-based automatic ID code reconfiguration of wireless input/output systems
    6.
    发明申请
    Proximity-based automatic ID code reconfiguration of wireless input/output systems 审中-公开
    无线输入/输出系统的基于接近的自动ID码重新配置

    公开(公告)号：US20050281224A1

    公开(公告)日：2005-12-22

    申请号：US11209599

    申请日：2005-08-22

    Applicant: Cris Fraenkel ,  John Cavacuiti

    Inventor： Cris Fraenkel ,  John Cavacuiti

    IPC: H04J20060101 ,  H04J1/00 ,  H04L12/24 ,  H04Q1/00 ,  H04Q5/22 ,  H04W8/24 ,  H04Q7/00

    CPC classification number: H04W8/245 ,  H04L41/0803

    Abstract: A system and method is disclosed for reconfiguring an ID code associated with a receiver to enable a receiver to respond to data packets tagged with the ID code sent from a desired transmitter. A preferred embodiment includes a transmitter, selectively responsive to an enable command, for broadcasting a data packet at a first power level when the enable command is asserted, the data packet including an ID code, the transmitter broadcasting an ID configuration command having a configuration ID code at a second power level less than the first power level when the enable signal is deasserted. The preferred embodiment of a method for operating a transmitter includes the steps of broadcasting a data packet at a first power level when an enable signal is asserted, the data packet including an ID code; and broadcasting an ID configuration command at a second power level less than the first power level when the enable signal is deasserted, the ID configuration command including a new ID code.

    Abstract translation: 公开了一种用于重新配置与接收机相关联的ID码的系统和方法，以使得接收机能够响应于从期望的发射机发送的ID码标记的数据分组。 优选实施例包括：当启用使能命令被确定时，选择性地响应于使能命令的发射机，用于以第一功率电平广播数据分组，所述数据分组包括ID代码，所述发射机广播具有配置ID的ID配置命令 当使能信号被无效时，在小于第一功率电平的第二功率电平下的代码。 用于操作发射机的方法的优选实施例包括以下步骤：当使能信号被断言时，以第一功率电平广播数据分组，所述数据分组包括ID码; 以及当所述使能信号被无效时，以小于所述第一功率电平的第二功率电平广播ID配置命令，所述ID配置命令包括新的ID码。

    Methods and apparatuses for peak detection among multiple signals
    8.
    发明申请
    Methods and apparatuses for peak detection among multiple signals 审中-公开
    用于多个信号之间峰值检测的方法和装置

    公开(公告)号：US20050174826A1

    公开(公告)日：2005-08-11

    申请号：US11086933

    申请日：2005-03-22

    Applicant: William Alexander

    Inventor： William Alexander

    IPC: G01D1/12 ,  G01R19/04 ,  G06F7/00 ,  G06F19/00 ,  G11C5/06 ,  H04J20060101

    CPC classification number: G01D1/12

    Abstract: Digital peak detection among multiple signals, or inputs. In one embodiment, a detection method that includes receiving multiple digitized input signals. For each digitized input signal, the method also includes noting a first data value associated with the digitized input signal at a first time. The method includes comparing the first data values to determine a largest first data value from among the first data values. For each digitized input signal, the method includes noting a second data value associated with the digitized input signal at a second time. The method includes comparing the second data values to determine a largest second data value from among the second data values. The method includes comparing the largest second data value with a threshold data value. The method includes detecting a peak when the largest second data value is greater than the threshold data value, and less than the largest first data value. In other embodiments, devices that includes a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC) that is configured to perform at least the steps of this detection method. That is, the FPGA or the ASIC can be provided with logic, or programming, that can be utilized in performing the steps of this detection method.

    Abstract translation: 多个信号或输入之间的数字峰值检测。 在一个实施例中，一种包括接收多个数字化输入信号的检测方法。 对于每个数字化的输入信号，该方法还包括在第一时间注意与数字化输入信号相关联的第一数据值。 该方法包括比较第一数据值以从第一数据值中确定最大的第一数据值。 对于每个数字化的输入信号，该方法包括在第二时间注意与数字化输入信号相关联的第二数据值。 该方法包括比较第二数据值以从第二数据值中确定最大的第二数据值。 该方法包括将最大的第二数据值与阈值数据值进行比较。 该方法包括当最大的第二数据值大于阈值数据值并小于最大的第一数据值时检测峰值。 在其他实施例中，包括现场可编程门阵列（FPGA）或专用集成电路（ASIC）的设备，其被配置为至少执行该检测方法的步骤。 也就是说，FPGA或ASIC可以被提供有可用于执行该检测方法的步骤的逻辑或编程。

    Method for supporting a plurality of subscribers operating on different frequency bands using a single access point
    9.
    发明申请
    Method for supporting a plurality of subscribers operating on different frequency bands using a single access point 有权
    用于使用单个接入点来支持在不同频带上操作的多个订户的方法

    公开(公告)号：US20050063349A1

    公开(公告)日：2005-03-24

    申请号：US10668865

    申请日：2003-09-23

    Applicant: Robert LoGalbo ,  Tyrone Bekiares ,  Shmuel Silverman

    Inventor： Robert LoGalbo ,  Tyrone Bekiares ,  Shmuel Silverman

    IPC: H04J20060101 ,  H04W88/08 ,  H04Q7/00

    CPC classification number: H04W88/08

    Abstract: The present invention allows a single access point (“AP”; 100) to support a plurality of devices (102, 104) operating on different frequency bands. During a first period of time, the AP initiates a contention free period at a first frequency. The AP switches from the first frequency to a second frequency, and communicates with devices operating at the second frequency. Periodically during the first period of time, the AP temporarily ceases communication with devices operating at the second frequency to initiate a contention free period at the second frequency, switch from the second frequency to the first frequency, initiate another contention free period at the first frequency, and switch from the first frequency back to the second frequency.

    Abstract translation: 本发明允许单个接入点（“AP”; 100）支持在不同频带上操作的多个设备（102,104）。 在第一时间段内，AP以第一频率发起无竞争期。 AP从第一频率切换到第二频率，并与在第二频率工作的设备进行通信。 在第一时间周期期间，AP暂时停止与在第二频率工作的设备的通信，以在第二频率发起无竞争时段，从第二频率切换到第一频率，以第一频率发起另一争用自由周期 ，并从第一频率切换回第二频率。

    Method and apparatus for synchronizing audio and video in encrypted videoconferences
    10.
    发明申请
    Method and apparatus for synchronizing audio and video in encrypted videoconferences 有权
    用于在加密视频会议中同步音频和视频的方法和装置

    公开(公告)号：US20050058287A1

    公开(公告)日：2005-03-17

    申请号：US10661110

    申请日：2003-09-12

    Applicant: Bran Ferren ,  W. Hillis ,  Gerard Roccanova

    Inventor： Bran Ferren ,  W. Hillis ,  Gerard Roccanova

    IPC: H04J20060101 ,  H04N7/14 ,  H04N7/167

    CPC classification number: H04N21/4788 ,  H04N7/142 ,  H04N7/147 ,  H04N21/8547

    Abstract: The invention provides a system that preserves the synchronization of the audio and video presented at a secure conferencing site without necessitating decryption, decompression, compression, and encryption of signals at the hub. The presently preferred embodiment of the invention provides an apparatus and method for synchronizing audio and video in encrypted videoconferences that comprises a plurality of conference sites; and a hub for receiving a compressed and encrypted, composite audio and video signal from each site, for determining a currently active site, and for transmitting said composite audio and video signal from said currently active site to all other sites; said hub receiving a compressed and encrypted audio only signal from each site; wherein said hub routes all incoming compressed and encrypted audio only signals to each site.

    Abstract translation: 本发明提供了一种系统，其保持在安全会议场所呈现的音频和视频的同步，而不需要在集线器处对信号进行解密，解压缩，压缩和加密。 本发明的当前优选实施例提供了一种用于在包括多个会议地点的加密视频会议中同步音频和视频的装置和方法; 以及用于从每个站点接收压缩和加密的复合音频和视频信号的集线器，用于确定当前活动的站点，以及用于将所述复合音频和视频信号从所述当前活动站点发送到所有其他站点; 所述集线器从每个站点接收压缩和加密的仅音频信号; 其中所述集线器将所有输入的压缩和加密的仅音频信号路由到每个站点。

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