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    Call processing using previously obtained line characteristics
    24.
    发明授权
    Call processing using previously obtained line characteristics 失效
    使用先前获得的线路特征的呼叫处理

    公开(公告)号：US5764759A

    公开(公告)日：1998-06-09

    申请号：US319159

    申请日：1994-10-06

    Applicant: Chris Hamilton ,  Prabhakar Chitrapu

    Inventor： Chris Hamilton ,  Prabhakar Chitrapu

    IPC: H04B3/23 ,  H04M9/00 ,  H04B3/20

    CPC classification number: H04B3/23

    Abstract: A technique for utilization of call processing resources in a call processing system is disclosed wherein echo characteristics of a telephone line ascertained and utilized by a echo canceler, and are also stored for subsequent use by a different echo canceler which processes a call on that same telephone line. The technique may also be used with call processing resources other than echo cancelers.

    Abstract translation: 公开了一种在呼叫处理系统中利用呼叫处理资源的技术，其中由回波消除器确定并利用的电话线路的回波特性，并且还被不同的回波消除器存储以用于在同一电话机上处理呼叫的后续使用 线。 除了回声消除器之外，该技术还可以用于呼叫处理资源。

    Method and apparatus for optimal utilization of a radio channel based on cognition model data
    25.
    发明申请
    Method and apparatus for optimal utilization of a radio channel based on cognition model data 审中-公开
    基于认知模型数据优化无线电信道利用的方法和装置

    公开(公告)号：US20080090563A1

    公开(公告)日：2008-04-17

    申请号：US11999353

    申请日：2007-12-05

    Applicant: Prabhakar Chitrapu

    Inventor： Prabhakar Chitrapu

    IPC: H04M3/42 ,  H04M1/00 ,  H04Q7/20 ,  H04Q7/22

    CPC classification number: G01S5/0252 ,  G01S5/02 ,  G01S5/0294 ,  G01S5/14 ,  H04L67/04 ,  H04L67/16 ,  H04L67/18 ,  H04L69/329 ,  H04W16/18 ,  H04W28/26 ,  H04W48/16 ,  H04W48/20 ,  H04W64/00 ,  H04W76/10 ,  H04W88/02 ,  H04W88/08

    Abstract: Classes of cognition models which may include: 1) Radio Environment models, 2) Mobility models and 3) Application/User Context models are utilized in a wireless communications network. Radio Environment models represent the physical aspects of the radio environment, such as shadowing losses, multi-path propagation, interference and noise levels, etc. Mobility models represent users motion, in terms of geo-coordinates and/or logical identifiers, such as street names etc. as well as speed of user terminal etc. The context model represents the present state and dynamics of each of these application processes within itself and between multiple application processes. These data are employed to optimize network performance.

    Abstract translation: 认知模型类可能包括：1）无线电环境模型，2）移动模型和3）无线通信网络中使用应用/用户上下文模型。 无线电环境模型表示无线电环境的物理方面，例如阴影丢失，多径传播，干扰和噪声水平等。移动模型表示用户在地理坐标和/或逻辑标识符（例如街道）方面的运动 名称等以及用户终端的速度等。上下文模型表示其本身和多个应用进程之间的这些应用进程中的每一个的当前状态和动态。 这些数据用于优化网络性能。

    APPARATUS AND METHODS FOR IMPLEMENTING HIERARCHICAL MODULATION AND DEMODULATION FOR GERAN EVOLUTION
    26.
    发明申请
    APPARATUS AND METHODS FOR IMPLEMENTING HIERARCHICAL MODULATION AND DEMODULATION FOR GERAN EVOLUTION 审中-公开
    用于实施GERAN演变的分层调制和解调的装置和方法

    公开(公告)号：US20070297533A1

    公开(公告)日：2007-12-27

    申请号：US11765697

    申请日：2007-06-20

    Applicant: Prabhakar Chitrapu ,  Paul Russell

    Inventor： Prabhakar Chitrapu ,  Paul Russell

    IPC: H04L27/20

    CPC classification number: H04L27/3488 ,  H04L27/183 ,  H04L2001/0098

    Abstract: The present invention relates to hierarchical modulation (HM) and demodulation for global system for mobile communications (GSM)/enhanced data rates for GSM evolution (EDGE) radio access network (GERAN) evolution. In one embodiment, HM symbols are generated by generating primary modulated symbols based on a first bit group, generating secondary modulated symbols based on a second bit group, and combining the primary modulated symbols and the secondary modulated symbols. In another embodiment, the HM symbols are demodulated. In yet another embodiment, a received GERAN signal is converted to baseband complex symbol values, which are processed to produce training symbols and data symbols that carry pilot symbols. Channel parameters of the radio channel are estimated based on the training symbols. An equalized signal is generated based on the estimated channel parameters and data symbol. Primary and secondary demodulated symbols are generated based on the equalized signal.

    Abstract translation: 本发明涉及用于GSM演进（EDGE）无线电接入网（GERAN）演进的全球移动通信系统（GSM）/增强数据速率的分级调制（HM）和解调。 在一个实施例中，通过基于第一位组生成主调制符号，基于第二位组生成二次调制符号，以及组合初次调制符号和次调制符号来生成HM符号。 在另一个实施例中，HM符号被解调。 在另一个实施例中，接收的GERAN信号被转换为基带复合符号值，其被处理以产生携带导频符号的训练符号和数据符号。 基于训练符号来估计无线信道的信道参数。 基于估计的信道参数和数据符号生成均衡信号。 基于均衡信号生成主和次解调符号。

    Method and system for securing wireless communications
    28.
    发明申请
    Method and system for securing wireless communications 审中-公开
    用于确保无线通信的方法和系统

    公开(公告)号：US20060133338A1

    公开(公告)日：2006-06-22

    申请号：US11283017

    申请日：2005-11-18

    Applicant: Alexander Reznik ,  Alan Carlton ,  Alain Briancon ,  Yogendra Shah ,  Prabhakar Chitrapu ,  Rajat Mukherjee ,  Marian Rudolf

    Inventor： Alexander Reznik ,  Alan Carlton ,  Alain Briancon ,  Yogendra Shah ,  Prabhakar Chitrapu ,  Rajat Mukherjee ,  Marian Rudolf

    IPC: H04Q7/24

    CPC classification number: H04W12/08 ,  H04L27/3477 ,  H04L63/107 ,  H04W12/00503 ,  H04W12/02 ,  H04W12/12 ,  H04W16/30

    Abstract: A method and system for securing wireless communications is disclosed. In one embodiment, different security policies are used based on the distance between a receiver and a transmitter, whereby data in the wireless communications can only be demodulated if received in particular trust zones. In another embodiment, a plurality of bit stream fragments are transmitted by a plurality of transmitters to a receiver located in an area where transmission patterns radiated by the transmitters intersect. Alternatively, the receiver performs a function on packet data units (PDUs) transmitted by the transmitters. In yet another embodiment, primary modulation points of a modulation constellation are split into clusters of proximate secondary modulation points which can be demodulated only by a receiver that is within range of the transmitter. In yet another embodiment, a main waveform is transmitted which overlays a QPSK signal with hierarchical modulation (HM) having encoded descrambling information.

    Abstract translation: 公开了一种用于确保无线通信的方法和系统。 在一个实施例中，基于接收机和发射机之间的距离使用不同的安全策略，由此无线通信中的数据只有在特定的信任区域中被接收时才能被解调。 在另一个实施例中，多个比特流片段由多个发射机发射到位于由发射机辐射的传输模式相交的区域中的接收机。 或者，接收机对发射机发送的分组数据单元（PDU）执行功能。 在另一个实施例中，调制星座的初级调制点被分成近似二次调制点的簇，其可以仅由位于发射机的范围内的接收机解调。 在另一个实施例中，发送主波形，其叠加具有编码解扰信息的分层调制（HM）的QPSK信号。

    Smart antenna for generating nested beams
    29.
    发明申请
    Smart antenna for generating nested beams 审中-公开
    用于产生嵌套光束的智能天线

    公开(公告)号：US20050261028A1

    公开(公告)日：2005-11-24

    申请号：US10902357

    申请日：2004-07-29

    Applicant: Prabhakar Chitrapu

    Inventor： Prabhakar Chitrapu

    IPC: H04B7/04 ,  H04B7/185 ,  H04W16/28

    CPC classification number: H04W16/28 ,  H04B7/0408

    Abstract: A smart antenna is disclosed for generating nested beams. The antenna is configured to generate a cover beam and a center beam. The cover beam has a wide coverage area and the center beam, which is nested within the cover beam, has a narrow coverage area. Both the cover beam and the center beam may be independently steerable or steered jointly as if coupled together. The cover beam is preferably used for system-wide purposes, such as multicasting, broadcasting, paging, tracking, and physical measurements. The center beam is preferably used for exchanging data between a transmitter and receiver. However, the cover beam and the center beam may also be used for transmission of data and signaling traffic respectively.

    Abstract translation: 公开了一种用于产生嵌套光束的智能天线。 天线被配置为产生覆盖光束和中心光束。 覆盖光束具有宽的覆盖区域，并且嵌套在覆盖光束内的中心光束具有窄的覆盖区域。 覆盖梁和中心梁都可以独立地引导或转向，如同联结在一起。 覆盖波束优选用于全系统的目的，例如多播，广播，寻呼，跟踪和物理测量。 中心波束优选用于在发射机和接收机之间交换数据。 然而，覆盖波束和中心波束也可以分别用于数据和信令业务的传输。

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