公开(公告)号：US20110080924A1

公开(公告)日：2011-04-07

申请号：US12896780

申请日：2010-10-01

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

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

IPC分类号： H04J3/00

CPC分类号： H04L27/2613 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/023

摘要： Systems and methods are provided for the transmission of waveforms to aid channel estimation, timing synchronization, and AGC bootstrapping in a wireless network. The method includes inserting at least one TDM pilot symbol located at a transition between wide area and local area waveforms to facilitate decoding of the transmission block.

摘要翻译： 提供了用于传输波形以辅助无线网络中的信道估计，定时同步和AGC自举的系统和方法。 该方法包括插入位于广域和局域波形之间的转变处的至少一个TDM导频符号，以便于传输块的解码。

公开(公告)号：US20110051618A1

公开(公告)日：2011-03-03

申请号：US12939118

申请日：2010-11-03

申请人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kirna Mukkavilli

发明人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kirna Mukkavilli

IPC分类号： H04W24/00 ,  H04L27/28

CPC分类号： H04L25/0232 ,  H04L25/022

摘要： Time filtering channel estimates in a wireless communication system, such as an Orthogonal Frequency Division Multiplex (OFDM) system, can be used to improve the quality of channel estimates. The characteristics of an optimal channel estimate time filter can depend on the manner in which the channel estimate is determined as well as the time correlation of channel estimates. A receiver can implement an adaptive time filter for channel estimates in which the time filter response can vary based on channel estimate parameters. The channel estimate parameters can include the manner of determining channel estimates, a time correlation of channel estimates, and an estimated Doppler frequency. The time filter response can be varied continuously over a range of responses or can be varied discretely over a predetermined number of time filter responses.

摘要翻译： 在诸如正交频分复用（OFDM）系统的无线通信系统中的时间滤波信道估计可以用于提高信道估计的质量。 最优信道估计时间滤波器的特征可以取决于信道估计的方式以及信道估计的时间相关性。 接收机可以实现用于信道估计的自适应时间滤波器，其中时间滤波器响应可以基于信道估计参数而变化。 信道估计参数可以包括确定信道估计的方式，信道估计的时间相关性和估计的多普勒频率。 时间滤波器响应可以在响应范围内连续变化，或者可以在预定数量的时间滤波器响应上离散变化。

公开(公告)号：US07881245B2

公开(公告)日：2011-02-01

申请号：US12506055

申请日：2009-07-20

申请人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaaswamy Murali ,  Ashok Mantravadi ,  Anand Subramaniam ,  Krishnamurthy Viswanathan, legal representative

发明人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaaswamy Murali ,  Ashok Mantravadi ,  Anand Subramaniam

IPC分类号： H04H20/71

CPC分类号： H04L5/0041 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L12/189 ,  H04W72/005

摘要： To broadcast different types of transmission having different tiers of coverage in a wireless broadcast network, each base station processes data for a wide-area transmission in accordance with a first mode (or coding and modulation scheme) to generate data symbols for the wide-area transmission and processes data for a local transmission in accordance with a second mode to generate data symbols for the local transmission. The first and second modes are selected based on the desired coverage for wide-area and local transmissions, respectively. The base station also generates pilots and overhead information for local and wide-area transmissions. The data, pilots, and overhead information for local and wide-area transmissions are multiplexed onto their transmission spans, which may be different sets of frequency subbands, different time segments, or different groups of subbands in different time segments. More than two different types of transmission may also be multiplexed and broadcast.

摘要翻译： 为了在无线广播网络中广播具有不同层次的不同类型的传输，每个基站根据第一模式（或编码和调制方案）处理广域传输的数据，以产生广域的数据符号 根据第二模式传输和处理用于本地传输的数据，以产生用于本地传输的数据符号。 分别基于广域和本地传输的期望覆盖来选择第一和第二模式。 基站还为本地和广域传输生成导频和开销信息。 用于本地和广域传输的数据，导频和开销信息被复用到它们的传输跨度，其可以是不同组的频率子带，不同时间段或不同时间段中的不同子带组。 多于两种不同类型的传输也可以被复用和广播。

公开(公告)号：US20100330977A1

公开(公告)日：2010-12-30

申请号：US12626382

申请日：2009-11-25

申请人： Tamer A. Kadous ,  Ashok Mantravadi ,  Venugopal V. Veeravalli ,  Charles A. Bergan ,  Joel B. Linsky ,  Richard D. Wietfeldt ,  George Chrisikos

发明人： Tamer A. Kadous ,  Ashok Mantravadi ,  Venugopal V. Veeravalli ,  Charles A. Bergan ,  Joel B. Linsky ,  Richard D. Wietfeldt ,  George Chrisikos

IPC分类号： H04M3/00

CPC分类号： H04W72/1215 ,  H04W88/06

摘要： Systems and methodologies are described herein that facilitate a centralized structure for managing multi-radio coexistence for a mobile device and/or other suitable device(s). As described herein, a control plane coexistence manager (CxM) entity and/or a data plane CxM entity can be implemented to directly interact with a set of associated transceivers (e.g., radios, etc.) in order to manage conflicts between events corresponding to the transceivers. Further, CxM operation can be divided between the control and data planes such that the control plane handles configuration and long-term operations such as radio registration, sleep mode management, long-term event resolution, interaction with upper layers, etc., while the data plane handles short-term operations with respect to radio event management based on incoming notifications or event requests. For instance, the data plane can evaluate a set of requested events, select event(s) to be executed, and provide responses to the associated transceivers relating to the selection(s).

摘要翻译： 本文描述了促进用于管理移动设备和/或其他合适设备的多无线电共存的集中式结构的系统和方法。 如本文所述，可以实现控制平面共存管理器（CxM）实体和/或数据平面CxM实体以直接与一组相关联的收发器（例如，无线电等）交互，以便管理对应于 收发器。 此外，可以在控制和数据平面之间划分CxM操作，使得控制平面处理配置和长期操作，例如无线电登记，睡眠模式管理，长期事件解析，与上层的交互等，而 数据平面基于传入的通知或事件请求处理关于无线电事件管理的短期操作。 例如，数据平面可以评估一组所请求的事件，选择要执行的事件，并且向相关的收发器提供与选择有关的响应。

公开(公告)号：US07813383B2

公开(公告)日：2010-10-12

申请号：US11372930

申请日：2006-03-09

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

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

IPC分类号： H04J3/06

CPC分类号： H04L27/2613 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/023

摘要： Systems and methods are provided for the transmission of waveforms. The method includes inserting at least one TDM pilot symbol located at a transition between wide area and local area waveforms to facilitate decoding of the transmission block.

摘要翻译： 提供了波形传输的系统和方法。 该方法包括插入位于广域和局域波形之间的转变处的至少一个TDM导频符号，以便于传输块的解码。

公开(公告)号：US07787517B2

公开(公告)日：2010-08-31

申请号：US11046121

申请日：2005-01-28

申请人： Ashok Mantravadi ,  Anand D. Subramaniam ,  Krishnamurthy Viswanathan, legal representative ,  Dhananjay Ashok Gore

发明人： Ashok Mantravadi ,  Anand D. Subramaniam ,  Dhananjay Ashok Gore

IPC分类号： H04L27/30

CPC分类号： H04H20/28 ,  H04H20/33 ,  H04H20/42 ,  H04H20/72 ,  H04L5/023 ,  H04L5/06

摘要： Accordingly, a method and apparatus are provided to convert received content into a first stream and a second stream, to transmit said first stream using a first tone and to transmit said second stream using an orthogonal scheme. A layering scheme is used to transmit the base stream covering a smaller area and an enhanced stream is used to cover a large utilizing orthogonal scheme.

摘要翻译： 因此，提供了一种方法和装置，用于将接收到的内容转换为第一流和第二流，以使用第一音调发送所述第一流，并使用正交方案发送所述第二流。 使用分层方案来传输覆盖较小区域的基本流，并且使用增强流来覆盖大的利用正交方案。

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。

公开(公告)号：US20100098032A1

公开(公告)日：2010-04-22

申请号：US12646520

申请日：2009-12-23

申请人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaswamy Murali ,  Ashok Mantravadi ,  Anand Subramaniam ,  Krishnamurthy Viswanathan

发明人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaswamy Murali ,  Ashok Mantravadi ,  Anand Subramaniam ,  Krishnamurthy Viswanathan

IPC分类号： H04J3/00 ,  H04L12/43

CPC分类号： H04L5/0041 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L12/189 ,  H04W72/005

摘要： To broadcast different types of transmission having different tiers of coverage in a wireless broadcast network, each base station processes data for a wide-area transmission in accordance with a first mode (or coding and modulation scheme) to generate data symbols for the wide-area transmission and processes data for a local transmission in accordance with a second mode to generate data symbols for the local transmission. The first and second modes are selected based on the desired coverage for wide-area and local transmissions, respectively. The base station also generates pilots and overhead information for local and wide-area transmissions. The data, pilots, and overhead information for local and wide-area transmissions are multiplexed onto their transmission spans, which may be different sets of frequency subbands, different time segments, or different groups of subbands in different time segments. More than two different types of transmission may also be multiplexed and broadcast.

摘要翻译： 为了在无线广播网络中广播具有不同层次的不同类型的传输，每个基站根据第一模式（或编码和调制方案）处理广域传输的数据，以产生广域的数据符号 根据第二模式传输和处理用于本地传输的数据，以产生用于本地传输的数据符号。 分别基于广域和本地传输的期望覆盖来选择第一和第二模式。 基站还为本地和广域传输生成导频和开销信息。 用于本地和广域传输的数据，导频和开销信息被复用到它们的传输跨度，其可以是不同组的频率子带，不同时间段或不同时间段中的不同子带组。 多于两种不同类型的传输也可以被复用和广播。

公开(公告)号：US20090304120A1

公开(公告)日：2009-12-10

申请号：US12480928

申请日：2009-06-09

申请人： Avneesh Agrawal ,  Durga Prasad Malladi ,  Anastasios Stamoulis ,  Ashok Mantravadi ,  Ramaswamy Murali

发明人： Avneesh Agrawal ,  Durga Prasad Malladi ,  Anastasios Stamoulis ,  Ashok Mantravadi ,  Ramaswamy Murali

IPC分类号： H03D1/00

CPC分类号： H04W88/10 ,  H04B7/2656 ,  H04L1/0083 ,  H04L5/14 ,  H04L27/2602 ,  H04W92/10 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/21 ,  Y02D70/449

摘要： Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna.

摘要翻译： 描述了使用循环延迟分集和飞行员交错传输数据的技术。 对于循环延迟分集，生成具有不同循环延迟持续时间的OFDM符号。 OFDM符号的循环延迟持续时间可以被选择为相对于由相邻基站发送的OFDM符号的循环延迟持续时间而变化的时间。 在不同符号周期的多组子带上生成和复用FDM导频。 可以生成用于第二无线电技术（例如，W-CDMA）的波形，用于使用该无线电技术发送的数据。 OFDM符号被复用到用于OFDM的时隙上，并且用于第二无线电技术的波形被复用到用于该无线电技术的时隙上。 可以基于多路复用的OFDM符号和波形来生成一个或多个调制信号。 每个调制信号从相应的天线发送。

公开(公告)号：US20090274119A1

公开(公告)日：2009-11-05

申请号：US12398718

申请日：2009-03-05

申请人： BINITA GUPTA ,  Ashok Mantravadi

发明人： BINITA GUPTA ,  Ashok Mantravadi

IPC分类号： H04W36/00

CPC分类号： H04W36/0061 ,  H04W36/0083 ,  H04W72/005

摘要： Methods and apparatus for RF handoff in a multi-frequency network. A method includes detecting a mobility event associated with a detection of a new wide area operating infrastructure (WOI), updating a current WOI identifier to a new WOI identifier, acquiring control channel information associated with the new WOI identifier, determining if an active registered flow list has been updated based on the control channel information, and performing an acquisition procedure to acquire one or more registered flows if it is determined that the active registered flow list has been updated. Another method includes detecting a mobility event associated with a detection of a new local area operating infrastructure (LOI), updating a current LOI identifier to a new LOI identifier, acquiring control channel information, determining if an active registered flow list has been updated, and performing an acquisition procedure to acquire one or more registered flows.

摘要翻译： 多频网络中RF切换的方法和装置。 一种方法包括检测与新的广域运营基础设施（WOI）的检测相关联的移动性事件，将当前的WOI标识符更新为新的WOI标识符，获取与新的WOI标识符相关联的控制信道信息，确定是否有效的注册流 已经基于控制信道信息更新列表，并且如果确定活动注册流列表已被更新，则执行获取程序以获取一个或多个注册流。 另一种方法包括检测与新的本地操作基础结构（LOI）的检测相关联的移动性事件，将当前LOI标识符更新为新的LOI标识符，获取控制信道信息，确定是否更新了活动注册流列表;以及 执行采集程序以获取一个或多个注册流。