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    Methods and apparatus for detecting the presence of a prescribed signal in a channel of a communications system
    1.
    发明授权
    Methods and apparatus for detecting the presence of a prescribed signal in a channel of a communications system 失效
    用于检测通信系统的通道中规定信号的存在的方法和装置

    公开(公告)号：US5854808A

    公开(公告)日：1998-12-29

    申请号：US614327

    申请日：1996-03-12

    申请人： George Peponides ,  Kumar Balachandran

    发明人： George Peponides ,  Kumar Balachandran

    IPC分类号： G10L11/02 ,  H04B17/00 ,  H04L12/56 ,  H04L27/00 ,  H04L27/18 ,  H04W48/18

    CPC分类号： H04L27/0012 ,  G10L25/78 ,  H04L27/18 ,  H04W48/18

    摘要： Methods and apparatus for detecting the presence of a particular signal among all the channels of interest in a cellular or similar type system are disclosed. A first method detects CDPD signals, and a second method detects DQPSK signals used in digital control channels in accordance with the IS-136 standard. These methods include the steps of sampling a received signal in at least one channel to obtain a predetermined number of samples for the at least one channel; computing an error value for each sample; determining a minimum error value; determining a ratio of the minimum error value to a reference value; and making a decision as to whether the received signal is the prescribed signal on the basis of at least the ratio, wherein the decision is made by comparing the ratio to a threshold value.

    摘要翻译： 公开了用于在蜂窝或类似类型系统中的所有感兴趣信道中检测特定信号的存在的方法和装置。 第一种方法检测CDPD信号，第二种方法根据IS-136标准检测在数字控制信道中使用的DQPSK信号。 这些方法包括以下步骤：在至少一个信道中对接收到的信号进行采样，以获得用于至少一个信道的预定数量的样本; 计算每个样本的误差值; 确定最小误差值; 确定最小误差值与参考值的比率; 以及至少基于所述比例来决定所述接收信号是否是所述规定信号，其中通过将所述比率与阈值进行比较来进行判定。

    Methods and apparatus for detecting a cellular digital packet data (CDPD) carrier
    2.
    发明授权
    Methods and apparatus for detecting a cellular digital packet data (CDPD) carrier 失效
    用于检测蜂窝数字分组数据（CDPD）载波的方法和装置

    公开(公告)号：US5574750A

    公开(公告)日：1996-11-12

    申请号：US121339

    申请日：1993-09-14

    申请人： George Peponides ,  Kumar Balachandran

    发明人： George Peponides ,  Kumar Balachandran

    IPC分类号： G10L11/02 ,  H04B17/00 ,  H04L12/56 ,  H04L27/00 ,  H04L27/18 ,  H04W48/18 ,  H04B3/46 ,  H03D1/00 ,  H04B1/04 ,  H04L7/00

    CPC分类号： H04W48/18 ,  G10L25/78 ,  H04L27/0012 ,  H04L27/18

    摘要： Disclosed herein are methods and apparatus for detecting the presence of a CDPD carrier in a channel of a cellular system (although the invention is broadly applicable to detecting a specific kind of carrier associated with an "overlay" system, wherein an "overlay" system is one that shares the frequency allocation of another system on a non-cooperating basis). This specification describes a spectral estimation technique for detection of a CDPD carrier. In addition, this specification describes an MMSE (minimum mean-squared error) method that improves on the spectral estimation method.

    摘要翻译： 本文公开了用于检测蜂窝系统的信道中的CDPD载波的存在的方法和装置（尽管本发明广泛地适用于检测与“覆盖”系统相关联的特定类型的载波，其中“覆盖”系统是 一个在不合作的基础上分享另一个系统的频率分配）。 本说明书描述了用于检测CDPD载波的频谱估计技术。 另外，本说明书中描述了一种改进了频谱估计方法的MMSE（最小均方误差）方法。

    Time synchronization in a network
    3.
    发明申请
    Time synchronization in a network 有权
    网络中的时间同步

    公开(公告)号：US20070025398A1

    公开(公告)日：2007-02-01

    申请号：US11339293

    申请日：2006-01-24

    申请人： Lawrence Yonge ,  Srinivas Katar ,  Timothy Vandermey ,  James Petranovich ,  Neal Riedel ,  George Peponides ,  Sherman Gavette

    发明人： Lawrence Yonge ,  Srinivas Katar ,  Timothy Vandermey ,  James Petranovich ,  Neal Riedel ,  George Peponides ,  Sherman Gavette

    IPC分类号： H04J3/06 ,  H04L7/00

    CPC分类号： H04J3/0655 ,  H04B3/54 ,  H04B2203/5408 ,  H04B2203/5412 ,  H04B2203/5416

    摘要： A method and corresponding system for communicating between stations in a network is presented. The method includes providing repeated beacon transmissions from a coordinator station for coordinating transmissions among the stations; transmitting a signal from a first station and receiving the signal at a second station; and performing one or both of: generating the signal based on a local clock at the first station and time adjustment information in a beacon transmission received by the first station, and sampling the signal at sample times based on a local clock at the second station and time adjustment information in a beacon transmission received by the second station.

    摘要翻译： 提出了一种用于在网络中的站之间进行通信的方法和对应系统。 该方法包括提供来自协调站的重复信标传输，用于协调站间的传输; 从第一站发送信号并在第二站接收信号; 并且执行以下中的一个或两个：基于第一站处的本地时钟生成信号和由第一站接收的信标发送中的时间调整信息，以及基于第二站处的本地时钟在采样时间采样信号，以及 由第二站接收的信标发送中的时间调整信息。

    Communicating in a network that includes a medium having varying transmission characteristics
    4.
    发明申请
    Communicating in a network that includes a medium having varying transmission characteristics 有权
    在包括具有变化的传输特性的介质的网络中进行通信

    公开(公告)号：US20070025391A1

    公开(公告)日：2007-02-01

    申请号：US11337946

    申请日：2006-01-23

    申请人： Lawrence Yonge ,  Srinivas Katar ,  James Petranovich ,  Neal Riedel ,  George Peponides ,  Wai Chan

    发明人： Lawrence Yonge ,  Srinivas Katar ,  James Petranovich ,  Neal Riedel ,  George Peponides ,  Wai Chan

    IPC分类号： H04L12/43

    CPC分类号： H04B3/54 ,  H04B2203/542 ,  H04B2203/5445

    摘要： A method and corresponding system for operating in a network in which stations communicate over a shared medium are presented. The shared medium has at least one varying channel characteristic that varies approximately periodically. The method includes providing repeated beacon transmissions from a coordinator station for coordinating transmissions among a plurality of the stations, wherein at least some beacon transmissions are synchronized to the varying channel characteristic; and transmitting from a first station to at least one receiving station during a time slot determined based on at least one of the beacon transmissions received by the first station from the coordinator station.

    摘要翻译： 提出了一种用于在站中在共享介质上通信的网络中操作的方法和对应系统。 共享介质具有至少一个变化的通道特性，其周期性地变化。 该方法包括提供来自协调器站的重复信标传输，用于协调多个站之间的传输，其中至少一些信标传输与变化的信道特性同步; 以及在基于由所述协调器站接收到的所述第一站的信标传输中的至少一个所确定的时隙期间，从第一站向至少一个接收站发送。