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    ADAPTIVE THRESHOLDING FOR OFDM CHANNEL ESTIMATION
    3.
    发明申请
    ADAPTIVE THRESHOLDING FOR OFDM CHANNEL ESTIMATION 有权
    OFDM信道估计的自适应阈值

    公开(公告)号：US20100002785A1

    公开(公告)日：2010-01-07

    申请号：US12250135

    申请日：2008-10-13

    申请人： Ashok Mantravadi ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi ,  Rajeev Krishnamurthi

    发明人： Ashok Mantravadi ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi ,  Rajeev Krishnamurthi

    IPC分类号： H04L27/28

    CPC分类号： H04L25/0218 ,  H04L5/0007 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224

    摘要： An adaptive thresholding technique eliminates suboptimum threshold values by adjusting for varying channel conditions to eliminate interference where no channel energy is present, without discarding viable taps having useful channel energy. The adaptive thresholding technique adaptively optimizes receive threshold values for both wide and local area channels based only on measured C/I ratios 300. Thresholds are calculated based on instantaneous C/I estimates and/or weighted average C/I estimates calculated from WID/LID energies obtained from the current superframe WIC/LIC symbols respectively. In alternate embodiments, thresholds are calculated based on instantaneous C/I estimates and/or weighted average C/I estimates calculated from WTPC and LTPC symbols for the wide and local area channels, respectively The present adaptive thresholding technique dynamically reduces the threshold as the C/I estimate increases to mitigate performance degradation due to removal of weak signal taps. There is a separate threshold for each of the 12 coding and modulation modes supported by an exemplary receiver.

    摘要翻译： 自适应阈值技术通过调整不同的信道条件来消除次优阈值，以消除不存在信道能量的干扰，而不丢弃具有有用信道能量的可行分接头。 自适应阈值技术仅基于测量的C / I比300自适应地优化宽和局域信道的接收阈值。阈值基于从WID / LID计算的瞬时C / I估计和/或加权平均C / I估计来计算 从当前超帧WIC / LIC符号获得的能量。 在替代实施例中，基于针对宽和局域信道的WTPC和LTPC符号计算的瞬时C / I估计和/或加权平均C / I估计来计算阈值。当前自适应阈值技术动态地将阈值设置为C /我估计增加以减轻由于去除弱信号抽头而导致的性能下降。 对于由示例性接收机支持的12个编码和调制模式中的每一个，存在单独的阈值。

    System and method for base station initiated call setup
    5.
    发明授权
    System and method for base station initiated call setup 失效
    用于基站发起呼叫建立的系统和方法

    公开(公告)号：US07069046B2

    公开(公告)日：2006-06-27

    申请号：US09739923

    申请日：2000-12-19

    申请人： Rajeev Krishnamurthi ,  Roy F. Quick ,  Bibhu Mohanty ,  Robert H. Kimball

    发明人： Rajeev Krishnamurthi ,  Roy F. Quick ,  Bibhu Mohanty ,  Robert H. Kimball

    IPC分类号： H04Q7/20 ,  H04M1/00 ,  H04M9/00 ,  H04B1/38

    CPC分类号： H04W76/10 ,  H04W24/06 ,  H04W60/04 ,  H04W68/00 ,  H04W76/20 ,  H04W76/25 ,  H04W92/14

    摘要： A system and method for performing base station initiated call setup is provided. A base station initiated call setup may be utilized to establish a test call, to deliver a packet data services call to a subscriber unit, or to reactivate a dormant packet call. The base station transmits a BS Service Request message to the mobile switching center, requesting initiation of the call. The mobile switching center will authorize the call if the call to be set up is directed to a subscriber unit located within the service area of the base station and if the service option to be used is authorized for the particular subscriber unit. The mobile switching center will allow or disallow the call depending on the state of the subscriber unit. The mobile switching center transmits a BS Service Response message to the base station, conveying the result of processing the BS Service Request message. If the base station initiated call setup is authorized and allowed, the call will generally proceed in the same manner as a subscriber terminated call.

    摘要翻译： 提供了一种执行基站发起呼叫建立的系统和方法。 可以利用基站发起的呼叫建立来建立测试呼叫，将分组数据业务呼叫传送给用户单元，或者重新激活休眠分组呼叫。 基站向移动交换中心发送BS业务请求消息，请求发起呼叫。 如果要建立的呼叫被引导到位于基站的服务区域内的用户单元，并且要被使用的服务选项被授权给特定用户单元，则移动交换中心将授权呼叫。 移动交换中心将根据用户单元的状态允许或禁止呼叫。 移动交换中心向基站发送BS业务响应消息，传送处理BS业务请求消息的结果。 如果基站发起的呼叫建立被授权和允许，则呼叫通常将以与用户终止呼叫相同的方式进行。

    Method and apparatus for providing an alert with information signal between a mobile switching center and a base station
    6.
    发明申请
    Method and apparatus for providing an alert with information signal between a mobile switching center and a base station 审中-公开
    用于在移动交换中心和基站之间提供具有信息信号的警报的方法和装置

    公开(公告)号：US20050174970A1

    公开(公告)日：2005-08-11

    申请号：US11083867

    申请日：2005-03-17

    申请人： Rajeev Krishnamurthi ,  Bibhu Mohanty ,  Roy Quick

    发明人： Rajeev Krishnamurthi ,  Bibhu Mohanty ,  Roy Quick

    IPC分类号： H04W4/16 ,  H04W36/08 ,  H04W76/02 ,  H04W88/18 ,  H04B7/216

    CPC分类号： H04W76/19 ,  H04W4/16 ,  H04W36/08 ,  H04W88/184

    摘要： Information Message signal between a mobile switching center and a base station in a cellular communication system. The invention recognizes that current provisions of the IS-634 standard lack support for certain required functionality on the interface between a mobile switching center and a base station, or the A-Interface. An Alert With Information Message signal is introduced on the A-Interface to support the required functionality. Introduction of the Alert With Information Message provides support for reliable call processing on the A-Interface for the call waiting procedure, the hard handoff procedure, and the resolution of a glare condition.

    摘要翻译： 蜂窝通信系统中移动交换中心与基站之间的信息消息信号。 本发明认识到IS-634标准的当前规定在移动交换中心和基站或A-Interface之间的接口上不支持某些所需功能。 带有信息的警报消息信号在A-Interface上引入，以支持所需的功能。 带有信息消息的警报简介为呼叫等待过程，硬切换过程和眩光条件的分辨率提供了对A接口的可靠呼叫处理的支持。

    Method and apparatus for providing an alert with information signal between a mobile switching center and a base station
    7.
    发明授权
    Method and apparatus for providing an alert with information signal between a mobile switching center and a base station 失效
    用于在移动交换中心和基站之间提供具有信息信号的警报的方法和装置

    公开(公告)号：US06870823B2

    公开(公告)日：2005-03-22

    申请号：US08863457

    申请日：1997-05-27

    申请人： Rajeev Krishnamurthi ,  Bibhu P. Mohanty ,  Roy F. Quick, Jr.

    发明人： Rajeev Krishnamurthi ,  Bibhu P. Mohanty ,  Roy F. Quick, Jr.

    IPC分类号： H04W4/16 ,  H04W36/08 ,  H04W76/02 ,  H04W88/18 ,  H04B7/216 ,  H04M7/00

    CPC分类号： H04W76/19 ,  H04W4/16 ,  H04W36/08 ,  H04W88/184

    摘要： The invention is a method and apparatus for providing an Alert With Information Message signal between a mobile switching center and a base station in a cellular communication system. The invention recognizes that current provisions of the IS-634 standard lack support for certain required functionality on the interface between a mobile switching center and a base station, or the A-Interface. An Alert With Information Message signal is introduced on the A-Interface to support the required functionality. Introduction of the Alert With Information Message provides support for reliable call processing on the A-Interface for the call waiting procedure, the hard handoff procedure, and the resolution of a glare condition.

    摘要翻译： 本发明是一种用于在蜂窝通信系统中的移动交换中心和基站之间提供警报信息消息信号的方法和装置。 本发明认识到IS-634标准的当前规定在移动交换中心和基站或A-Interface之间的接口上不支持某些所需功能。 带有信息的警报消息信号在A-Interface上引入，以支持所需的功能。 带有信息消息的警报简介为呼叫等待过程，硬切换过程和眩光条件的分辨率提供了对A接口的可靠呼叫处理的支持。

    ROBUST SPUR INDUCED TRANSMIT ECHO CANCELLATION FOR MULTI-CARRIER SYSTEMS SUPPORT IN AN RF INTEGRATED TRANSCEIVER
    8.
    发明申请
    ROBUST SPUR INDUCED TRANSMIT ECHO CANCELLATION FOR MULTI-CARRIER SYSTEMS SUPPORT IN AN RF INTEGRATED TRANSCEIVER 审中-公开
    RF集成收发器中的多载波系统支持的强大的SPUR感应发射ECHO取消

    公开(公告)号：US20130040555A1

    公开(公告)日：2013-02-14

    申请号：US13351110

    申请日：2012-01-16

    申请人： Roberto Rimini ,  Peter D. Heidmann ,  Rajeev Krishnamurthi ,  Joseph Patrick Burke

    发明人： Roberto Rimini ,  Peter D. Heidmann ,  Rajeev Krishnamurthi ,  Joseph Patrick Burke

    IPC分类号： H04W4/00 ,  H04K3/00

    CPC分类号： H04B1/109 ,  H04B1/525

    摘要： A method and apparatus for eliminating transmit echo spurs is provided. The method includes the steps of: estimating a distortion effect applied to a transmit signal by a duplexer stop band. Next, the contribution of a primary component of the spur is estimated. An image component of the spur is estimated after the primary contribution has been estimated. The transmit echo is then subtracted from the composite desired signal by digitally subtracting the distortion effect, the primary component of the spur, and the image component of the spur, producing the desired composite transmit signal without the transmit echo.

    摘要翻译： 提供了一种用于消除发射回波刺激的方法和装置。 该方法包括以下步骤：通过双工器停止频带来估计应用于发送信号的失真效应。 接下来，估计刺激的主要成分的贡献。 在估计主要贡献之后，估计刺激的图像分量。 然后通过数字地减去失真效应，支线的主要分量和支线的图像分量从复合期望信号中减去发送回波，产生没有发送回波的期望的复合发送信号。

    METHODS AND APPARATUS FOR TRANSMITTING LAYERED AND NON-LAYERED DATA VIA LAYERED MODULATION
    10.
    发明申请
    METHODS AND APPARATUS FOR TRANSMITTING LAYERED AND NON-LAYERED DATA VIA LAYERED MODULATION 有权
    通过层状调制传输层和非层数据的方法和装置

    公开(公告)号：US20100046675A1

    公开(公告)日：2010-02-25

    申请号：US12607879

    申请日：2009-10-28

    申请人： Bruce Collins ,  Rajeev Krishnamurthi ,  Murali Ramaswamy Chari ,  Shusheel Gautam ,  Rajiv Vijayan ,  Seong Taek Chung

    发明人： Bruce Collins ,  Rajeev Krishnamurthi ,  Murali Ramaswamy Chari ,  Shusheel Gautam ,  Rajiv Vijayan ,  Seong Taek Chung

    IPC分类号： H04L27/06

    CPC分类号： H04L1/0065 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0058 ,  H04L5/023 ,  H04L27/3488 ,  H04L2001/0098

    摘要： A media access control (MAC) layer controller can manage base layer data and enhancement layer data in a layered modulation system. The MAC layer controller can process both base layer data and enhancement layer data and map the encoded symbols to a layered modulation constellation when both are present. If data for one of the layers terminates, then the MAC layer controller can generate and supply predetermined stuffing data to the layer lacking additional data. The MAC layer controller can send a control signal to the physical layer hardware to cause the hardware to map the layered signals having the stuffing data to a modified signal constellation. The MAC controller can also generate an overhead message that indicates the occurrence of the stuffing data. The receiver can receive the overhead message and can use the information to configure the receiver for the layered modulation constellation or the modified signal constellation.

    摘要翻译： 媒体访问控制（MAC）层控制器可以在分层调制系统中管理基层数据和增强层数据。 当两者都存在时，MAC层控制器可以处理基本层数据和增强层数据两者并将编码符号映射到分层调制星座。 如果其中一层的数据终止，则MAC层控制器可以生成并向缺少附加数据的层提供预定的填充数据。 MAC层控制器可以向物理层硬件发送控制信号，使得硬件将具有填充数据的分层信号映射到修改的信号星座。 MAC控制器还可以生成指示填充数据的发生的开销消息。 接收机可以接收开销消息，并且可以使用该信息来配置用于分层调制星座或修改的信号星座的接收机。