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    APPARATUS AND METHODS FOR TESTING USING MODULATION ERROR RATIO
    1.
    发明申请
    APPARATUS AND METHODS FOR TESTING USING MODULATION ERROR RATIO 失效
    使用调制错误比例进行测试的装置和方法

    公开(公告)号：US20080242225A1

    公开(公告)日：2008-10-02

    申请号：US11834679

    申请日：2007-08-06

    申请人： Raghuraman Krishnamoorthi ,  Thomas Sun ,  Ashok Mantravadi

    发明人： Raghuraman Krishnamoorthi ,  Thomas Sun ,  Ashok Mantravadi

    IPC分类号： H04B17/02

    CPC分类号： H04L1/206 ,  H04L1/24 ,  H04L27/2626 ,  H04L2001/0097

    摘要： Apparatus and methods are disclosed for testing or qualifying a repeater/transmitter in a multicarrier system by utilizing modulation error ratio (MER). In particular, a disclosed method includes determining an estimated effective modulation error ratio of an output of the repeater/transmitter. The estimated effective modulation error ratio is compared with a predetermined threshold, and the repeater/transmitter is qualified when the estimated effective modulation error ratio is greater than the predetermined threshold. Using an estimated modulation error ratio for repeater/transmitters, which can have non-flat modulation error ratios over a total number of subcarriers, affords an efficient method to test and qualify repeater/transmitters.

    摘要翻译： 公开了用于通过利用调制误差比（MER）在多载波系统中测试或限定中继器/发射机的装置和方法。 具体地，所公开的方法包括确定中继器/发射机的输出的估计有效调制误差比。 将估计的有效调制误差比与预定阈值进行比较，并且当估计的有效调制误差比大于预定阈值时，中继器/发射机被限定。 对于可能在副载波总数上具有非平坦调制误差比的中继器/发射机使用估计的调制误差率，提供了测试和限定中继器/发射机的有效方法。

    Apparatus and methods for testing using modulation error ratio
    2.
    发明授权
    Apparatus and methods for testing using modulation error ratio 失效
    使用调制误差比测试的装置和方法

    公开(公告)号：US08676115B2

    公开(公告)日：2014-03-18

    申请号：US11834679

    申请日：2007-08-06

    申请人： Raghuraman Krishnamoorthi ,  Thomas Sun ,  Ashok Mantravadi

    发明人： Raghuraman Krishnamoorthi ,  Thomas Sun ,  Ashok Mantravadi

    IPC分类号： H04B17/02

    CPC分类号： H04L1/206 ,  H04L1/24 ,  H04L27/2626 ,  H04L2001/0097

    摘要： Apparatus and methods are disclosed for testing or qualifying a repeater/transmitter in a multicarrier system by utilizing modulation error ratio (MER). In particular, a disclosed method includes determining an estimated effective modulation error ratio of an output of the repeater/transmitter. The estimated effective modulation error ratio is compared with a predetermined threshold, and the repeater/transmitter is qualified when the estimated effective modulation error ratio is greater than the predetermined threshold. Using an estimated modulation error ratio for repeater/transmitters, which can have non-flat modulation error ratios over a total number of subcarriers, affords an efficient method to test and qualify repeater/transmitters.

    摘要翻译： 公开了用于通过利用调制误差比（MER）在多载波系统中测试或限定中继器/发射机的装置和方法。 具体地，所公开的方法包括确定中继器/发射机的输出的估计有效调制误差比。 将估计的有效调制误差比与预定阈值进行比较，并且当估计的有效调制误差比大于预定阈值时，中继器/发射机被限定。 对于可能在副载波总数上具有非平坦调制误差比的中继器/发射机使用估计的调制误差率，提供了测试和限定中继器/发射机的有效方法。

    METHODS AND APPARATUS FOR TIME TRACKING USING ASSITANCE FROM TDM PILOTS IN A COMMUNICATION NETWORK
    5.
    发明申请
    METHODS AND APPARATUS FOR TIME TRACKING USING ASSITANCE FROM TDM PILOTS IN A COMMUNICATION NETWORK 有权
    在通信网络中使用TDM PILOTS的资产进行时间跟踪的方法和装置

    公开(公告)号：US20110116396A1

    公开(公告)日：2011-05-19

    申请号：US12917789

    申请日：2010-11-02

    申请人： Bojan Vrcelj ,  Ashok Mantravadi ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

    发明人： Bojan Vrcelj ,  Ashok Mantravadi ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

    IPC分类号： H04J3/14 ,  H04L12/26

    CPC分类号： H04L27/2662 ,  H04L25/0216 ,  H04L25/0224 ,  H04L27/2675 ,  H04L27/2695

    摘要： Methods and apparatus for time tracking using assistance from TDM pilots in a communication network. In an aspect, a method is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The method includes determining a delay spread, and modifying at least one parameter used by the time tracking algorithm based on the delay spread. In another aspect, an apparatus is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The apparatus includes computation logic for determining a delay spread, and control logic for modifying at least one parameter used by the time tracking algorithm based on the delay spread.

    摘要翻译： 在通信网络中使用TDM导频协助进行时间跟踪的方法和装置。 在一方面，提供了一种用于在通信网络上操作的设备中进行时间跟踪的方法，其中该设备执行时间跟踪算法。 该方法包括确定延迟扩展，以及基于延迟扩展修改由时间跟踪算法使用的至少一个参数。 在另一方面，提供了一种用于在通信网络上操作的设备中进行时间跟踪的设备，其中该设备执行时间跟踪算法。 该装置包括用于确定延迟扩展的计算逻辑，以及用于基于延迟扩展修改由时间跟踪算法使用的至少一个参数的控制逻辑。

    RF CHANNEL SWITCHING IN BROADCAST OFDM SYSTEMS
    8.
    发明申请
    RF CHANNEL SWITCHING IN BROADCAST OFDM SYSTEMS 有权
    广播OFDM系统中的RF信道切换

    公开(公告)号：US20100165851A1

    公开(公告)日：2010-07-01

    申请号：US12722308

    申请日：2010-03-11

    申请人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    发明人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    IPC分类号： H04W4/00 ,  H04B17/00 ,  H04L12/26

    CPC分类号： H04W48/16

    摘要： Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.

    摘要翻译： 描述了便于在无线通信环境中监视RF信道以确定一个或多个信道是包括仅前向链路（FLO）信号的系统和方法。 接收机可以接收具有FLO信号的第一RF信道，并且可以监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以在第一RF信道和所监视的RF信道之间切换，以便于提供FLO信号的无缝接收，FLO信号可以在RF信道之间超帧同步。 可以使用广域识别信道能量检测协议和广域开销信息符号解码错误检测协议中的一个或多个来执行FLO信号检测。

    METHODS AND APPARATUS FOR ADAPTING CHANNEL ESTIMATION IN A COMMUNICATION SYSTEM
    9.
    发明申请
    METHODS AND APPARATUS FOR ADAPTING CHANNEL ESTIMATION IN A COMMUNICATION SYSTEM 有权
    在通信系统中适应通道估计的方法和装置

    公开(公告)号：US20090245333A1

    公开(公告)日：2009-10-01

    申请号：US12396144

    申请日：2009-03-02

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

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

    IPC分类号： H04B1/38

    CPC分类号： H04L25/0202

    摘要： Methods and apparatus for adapting a channel estimation scheme in a transceiver in a communication system are disclosed to adapt channel estimation to the transceiver environment, particularly for high Doppler environments. The disclosed methods and apparatus effect determination of an estimate of a power delay profile of a channel or a time correlation of the channel, or both. A channel estimation scheme is then determined based on at least one of the determined power delay profile and time correlation of the channel. By basing determination of a channel estimation scheme on the power delay profile and/or the time correlation of the channel, the channel estimation scheme is adapted to the particular environment of the transceiver by accounting for the delay spread of the channel and/or the speed of the transceiver.

    摘要翻译： 公开了用于在通信系统中的收发器中适配信道估计方案的方法和装置，以使信道估计适应收发器环境，特别是对于高多普勒环境。 所公开的方法和装置效应确定信道的功率延迟分布的估计或信道的时间相关性，或两者。 然后基于所确定的功率延迟分布和信道的时间相关性中的至少一个来确定信道估计方案。 通过基于信道估计方案对功率延迟分布的确定和/或信道的时间相关性，信道估计方案通过考虑信道的延迟扩展和/或速度来适应收发器的特定环境 的收发器。

    Methods and Apparatus for RF Channel Switching in a Multi-Frequency Network
    10.
    发明申请
    Methods and Apparatus for RF Channel Switching in a Multi-Frequency Network 有权
    用于多频网络中RF信道切换的方法和装置

    公开(公告)号：US20090080378A1

    公开(公告)日：2009-03-26

    申请号：US12055981

    申请日：2008-03-26

    申请人： Binita Gupta ,  An Mei Chen ,  Linbo Li ,  Raghuraman Krishnamoorthi ,  Ashok Mantravadi

    发明人： Binita Gupta ,  An Mei Chen ,  Linbo Li ,  Raghuraman Krishnamoorthi ,  Ashok Mantravadi

    IPC分类号： H04W40/02

    CPC分类号： H04W72/005 ,  H04H20/06 ,  H04H20/22 ,  H04H20/42 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0091 ,  H04W16/02

    摘要： Methods and apparatus for RF channel switching in a multi-frequency network. In an aspect, a method includes identifying a local area operations infrastructure (LOI) in the multi-frequency network, generating a channel description message that associates at least one descrambling sequence identifier with each RF channel associated with the LOI, respectively, and distributing the CDM over the LOI. In another aspect, a method includes receiving a CDM that associates at least one descrambling sequence identifier with each RF channel available in a LOI, detecting an RF channel switch event that identifies a selected RF channel, determining a selected descrambling sequence identifier from the CDM based on the selected RF channel, switching to the selected RF channel wherein the selected descrambling sequence identifier identifies a selected descrambling sequence to descramble desired content carried on the selected RF channel, and acquiring the desired content on the selected RF channel.

    摘要翻译： 多频网络中RF信道切换的方法和装置。 一方面，一种方法包括识别多频网络中的局域操作基础结构（LOI），生成分别将至少一个解扰序列标识符与与LOI相关联的每个RF信道相关联的信道描述消息，并分发 CDM超过LOI。 在另一方面，一种方法包括接收将至少一个解扰序列标识符与LOI中可用的每个RF信道相关联的CDM，检测识别所选RF信道的RF信道切换事件，从基于CDM确定所选解扰序列标识符 在所选择的RF信道上，切换到所选择的RF信道，其中所选择的解扰序列标识符识别所选择的解扰序列，以对所选择的RF信道上承载的期望内容进行解扰，以及在所选择的RF信道上获取所需的内容。