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11. 发明授权

US08005420B2 Method and apparatus for seamlessly switching reception between mutlimedia streams in a wireless communication system 有权
标题翻译：用于在无线通信系统中无缝切换多媒体流之间的接收的方法和装置
公开(公告)号：US08005420B2
公开(公告)日：2011-08-23
申请号：US11752291
申请日：2007-05-22
申请人： Ramaswamy Murali , Gordon Kent Walker , Rajiv Vijayan
发明人： Ramaswamy Murali , Gordon Kent Walker , Rajiv Vijayan
IPC分类号： H04H40/00
CPC分类号： H04N5/4401 , H04N5/50 , H04N21/41407 , H04N21/4345 , H04N21/4384 , H04N21/44222
摘要： Techniques to seamlessly switch reception between multimedia programs are described. For “continued decoding”, a wireless device continues to receive, decode, decompress, and (optionally) display a current program, even after a new program has been selected, until overhead information needed to decode the new program is received. After receiving the overhead information, the wireless device decodes the new program but continues to decompress the current program. The wireless device decompresses the new program after decoding this program. For “early decoding”, the wireless device receives a user input and identifies a program with potential for user selection. The identified program may be the one highlighted by the user input or a program anticipated to be selected based on the user input. The wireless device initiates decoding of the identified program, prior to its selection, so that the program can be decompressed and displayed earlier if it is subsequently selected.
摘要翻译：描述了在多媒体节目之间无缝切换接收的技术。对于“继续解码”，即使在选择了新的程序之后，无线设备继续接收，解码，解压缩和（可选地）显示当前程序，直到接收到解码新程序所需的开销信息。在接收到开销信息之后，无线设备解码新程序，但是继续解压缩当前程序。解码该程序后，无线设备解压缩新程序。对于“早期解码”，无线设备接收用户输入并识别具有用户选择潜力的节目。识别的程序可以是由用户输入或预期将基于用户输入选择的程序突出显示的程序。无线设备在其选择之前启动所识别的节目的解码，使得如果随后选择该节目，则可以更早地解压缩并显示节目。

12. 发明授权

US07881245B2 Local and wide-area transmissions in a wireless broadcast network 有权
标题翻译：无线广播网络中的本地和广域传输
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。

13. 发明申请

US20100265865A9 MULTIPLEXING AND TRANSMISSION OF MULTIPLE DATA STREAMS IN A WIRELESS MULTI-CARRIER COMMUNICATION SYSTEM 有权
标题翻译：无线多载波通信系统中多路数据流的多路复用与传输
公开(公告)号：US20100265865A9
公开(公告)日：2010-10-21
申请号：US11751631
申请日：2007-05-21
申请人： Rajiv Vijayan , Aamod Khandekar , Fuyun Ling , Gordon Kent Walker , Ramaswamy Murali
发明人： Rajiv Vijayan , Aamod Khandekar , Fuyun Ling , Gordon Kent Walker , Ramaswamy Murali
IPC分类号： H04J3/24
CPC分类号： H04W52/0209 , H04B7/12 , H04L1/0057 , H04L1/0065 , H04L1/0071 , H04L1/0083 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0053 , H04L5/06 , H04L25/0224 , H04L27/2602 , H04N21/2383 , H04N21/4382 , H04N21/6112 , H04W4/06 , H04W28/06 , H04W72/04 , Y02D70/166 , Y02D70/168 , Y02D70/442
摘要： Techniques for multiplexing and transmitting multiple data streams are described. Transmission of the multiple data streams occurs in “super-frames”. Each super-frame has a predetermined time duration and is further divided into multiple (e.g., four) frames. Each data block for each data stream is outer encoded to generate a corresponding code block. Each code block is partitioned into multiple subblocks, and each data packet in each code block is inner encoded and modulated to generate modulation symbols for the packet. The multiple subblocks for each code block are transmitted in the multiple frames of the same super-frame, one subblock per frame. Each data stream is allocated a number of transmission units in each super-frame and is assigned specific transmission units to achieve efficient packing. A wireless device can select and receive individual data streams.
摘要翻译：描述用于复用和传输多个数据流的技术。多个数据流的传输发生在“超帧”中。每个超帧具有预定的持续时间并进一步分为多个（例如，四个）帧。每个数据流的每个数据块被外部编码以生成相应的代码块。每个码块被划分成多个子块，并且每个码块中的每个数据分组被内部编码和调制以产生分组的调制符号。每个码块的多个子块在相同超帧的多个帧中传送，每帧一个子块。每个数据流在每个超帧中被分配多个传输单元，并被分配特定的传输单元以实现有效的打包。无线设备可以选择和接收各个数据流。

14. 发明申请

US20100119005A1 RATE ADAPTIVE TRANSMISSION SCHEME FOR MIMO SYSTEMS 有权
标题翻译：用于MIMO系统的速率自适应传输方案
公开(公告)号：US20100119005A1
公开(公告)日：2010-05-13
申请号：US12690307
申请日：2010-01-20
申请人： Avneesh Agrawal , Rajiv Vijayan , Tamer Kadous
发明人： Avneesh Agrawal , Rajiv Vijayan , Tamer Kadous
IPC分类号： H04B7/02
CPC分类号： H04L1/0618 , H04B7/0417 , H04B7/0443 , H04B7/0465 , H04B7/0615 , H04B7/0891 , H04W52/34 , H04W52/42
摘要： A rate adaptive transmission scheme for MIMO systems, which can transmit a variable number of data symbol streams, provide transmit diversity for each data symbol stream, and fully utilize the total transmit power of the system and the full power of each antenna. In one method, at least one data symbol stream is received for transmission from a plurality of antennas. Each data symbol stream is scaled with a respective weight corresponding to the amount of transmit power allocated to that stream. The scaled data symbol stream(s) are multiplied with a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas. The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a DFT matrix) is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at (or near) the full power for the associated antenna.
摘要翻译：可以传输可变数量的数据符号流的MIMO系统的速率自适应传输方案为每个数据符号流提供发射分集，并且充分利用系统的总发射功率和每个天线的全功率。在一种方法中，接收至少一个数据符号流用于从多个天线发射。每个数据符号流用对应于分配给该流的发射功率的量的相应权重进行缩放。缩放的数据符号流与发射基矩阵相乘以为多个天线提供多个发射符号流。定义发射基矩阵（例如，沃尔什 - 哈达玛矩阵或DFT矩阵），使得每个数据符号流从所有天线发送，并且每个发射符号流以（或接近）相关天线的全功率发射。

15. 发明申请

US20100098032A1 LOCAL AND WIDE-AREA TRANSMISSIONS IN A WIRELESS BROADCAST NETWORK 有权
标题翻译：无线广播网络中的本地和宽带传输
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。

16. 发明申请

US20090129511A1 STAGGEREDPILOT TRANSMISSION FOR CHANNEL ESTIMATION AND TIME TRACKING 有权
标题翻译： STAGGEREDPILOT传输信道估计和时间跟踪
公开(公告)号：US20090129511A1
公开(公告)日：2009-05-21
申请号：US12254680
申请日：2008-10-20
申请人： Rajiv Vijayan , Ashok Mantravadi , Krishna Kiran Mukkavilli
发明人： Rajiv Vijayan , Ashok Mantravadi , Krishna Kiran Mukkavilli
IPC分类号： H04L27/06
CPC分类号： H04L25/022 , H04L5/0048 , H04L23/02 , H04L25/0212 , H04L25/0228 , H04L27/2662 , H04L27/2695
摘要： To allow a receiving entity to derive a longer channel estimate while limiting overhead, a transmitting entity transmits a pilot on different groups of subbands in different time intervals. N subbands in the system are arranged into M non-overlapping groups. Each group includes P=N/M subbands that are uniformly distributed across the N subbands. The transmitting entity transmits the pilot on a different subband group in each time interval, and selects all M subband groups in M time intervals based on a pilot staggering pattern. The receiving entity derives (1) an initial impulse response estimate with P channel taps based on the pilot received on one subband group and (2) two longer impulse response estimates with different lengths used for data detection and time tracking. Each longer impulse response estimate may be derived by filtering initial impulse response estimates for a sufficient number of subband groups using a time-domain filter.
摘要翻译：为了允许接收实体在限制开销的同时导出更长的信道估计，发送实体以不同的时间间隔在不同的子带组上发送导频。系统中的N个子带被布置成M个非重叠组。每组包括均匀分布在N个子带上的P = N / M个子带。发送实体在每个时间间隔中在不同子带组上发送导频，并且基于导频交错模式以M个时间间隔选择所有M个子带组。接收实体基于在一个子带组上接收到的导频导出（1）具有P信道抽头的初始脉冲响应估计，以及（2）用于数据检测和时间跟踪的两个具有不同长度的较长脉冲响应估计。可以通过使用时域滤波器对足够数量的子带组的初始脉冲响应估计进行滤波来导出更长的脉冲响应估计。

17. 发明授权

US07457231B2 Staggered pilot transmission for channel estimation and time tracking 有权
标题翻译：用于信道估计和时间跟踪的交错导频传输
公开(公告)号：US07457231B2
公开(公告)日：2008-11-25
申请号：US10926884
申请日：2004-08-25
申请人： Rajiv Vijayan , Ashok Mantravadi , Krishna Kiran Mukkavilli
发明人： Rajiv Vijayan , Ashok Mantravadi , Krishna Kiran Mukkavilli
IPC分类号： H04J11/00
CPC分类号： H04L25/022 , H04L5/0048 , H04L23/02 , H04L25/0212 , H04L25/0228 , H04L27/2662 , H04L27/2695
摘要： To allow a receiving entity to derive a longer channel estimate while limiting overhead, a transmitting entity transmits a pilot on different groups of subbands in different time intervals. N subbands in the system are arranged into M non-overlapping groups. Each group includes P=N/M subbands that are uniformly distributed across the N subbands. The transmitting entity transmits the pilot on a different subband group in each time interval, and selects all M subband groups in M time intervals based on a pilot staggering pattern. The receiving entity derives (1) an initial impulse response estimate with P channel taps based on the pilot received on one subband group and (2) two longer impulse response estimates with different lengths used for data detection and time tracking. Each longer impulse response estimate may be derived by filtering initial impulse response estimates for a sufficient number of subband groups using a time-domain filter.
摘要翻译：为了允许接收实体在限制开销的同时导出较长的信道估计，发送实体以不同的时间间隔在不同的子带组上发送导频。系统中的N个子带被布置成M个非重叠组。每组包括均匀分布在N个子带上的P = N / M个子带。发送实体在每个时间间隔中在不同子带组上发送导频，并且基于导频交错模式以M个时间间隔选择所有M个子带组。接收实体基于在一个子带组上接收到的导频导出（1）具有P信道抽头的初始脉冲响应估计，以及（2）用于数据检测和时间跟踪的两个具有不同长度的较长脉冲响应估计。可以通过使用时域滤波器对足够数量的子带组的初始脉冲响应估计进行滤波来导出更长的脉冲响应估计。

18. 发明申请

US20070097909A1 Scalable frequency band operation in wireless communication systems 有权
标题翻译：无线通信系统中的可扩展频带操作
公开(公告)号：US20070097909A1
公开(公告)日：2007-05-03
申请号：US11261832
申请日：2005-10-27
申请人： Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal , Rajiv Vijayan , Edward Teague , Fatih Ulupinar
发明人： Aamod Khandekar , Alexei Gorokhov , Avneesh Agrawal , Rajiv Vijayan , Edward Teague , Fatih Ulupinar
IPC分类号： H04Q7/00
CPC分类号： H04W28/20 , H04W8/22 , H04W72/12 , H04W72/1205 , H04W72/1268
摘要： To support mobile stations that are not capable of demodulating the entire bandwidth or that can be made to demodulate less than the entire bandwidth, a system, apparatus and method are provided to schedule users on less than all of the bandwidth. Further, certain users can be scheduled on more of the bandwidth than others.
摘要翻译：为了支持不能解调整个带宽或者可以使其解调的小于整个带宽的移动站，提供了一种系统，装置和方法，以在小于全部带宽上调度用户。此外，某些用户可以比其他用户更多地调度带宽。

19. 发明申请

US20060256708A1 System and method for time diversity 有权
公开(公告)号：US20060256708A1
公开(公告)日：2006-11-16
申请号：US11193053
申请日：2005-07-29
申请人： Michael Wang , Fuyun Ling , Murali Chari , Rajiv Vijayan
发明人： Michael Wang , Fuyun Ling , Murali Chari , Rajiv Vijayan
IPC分类号： H04J11/00
CPC分类号： H04L1/0071 , H01R24/38 , H03M13/27 , H03M13/271 , H03M13/2757 , H03M13/276 , H03M13/2771 , H04L1/00 , H04L1/0041 , H04L1/0066 , H04L1/007 , H04L5/0007 , H04L5/0042 , H04L5/0044 , H04L5/0048 , H04L5/0083 , H04L25/0226 , H04L27/2607 , H04L27/261 , H04L27/2626 , H04L27/2656 , H04L27/2662
摘要： A system and method for time diversity uses interleaving. To simplify the operation at both transmitters and receivers, a formula can be used to determine the mapping from slot to interlace at a given OFDM symbol time.

20. 发明申请

US20060205382A1 Apparatus and method for determining sleep clock timing 失效
标题翻译：用于确定睡眠时钟定时的装置和方法
公开(公告)号：US20060205382A1
公开(公告)日：2006-09-14
申请号：US11271409
申请日：2005-11-09
申请人： Michael Wang , Fuyun Ling , Rajiv Vijayan
发明人： Michael Wang , Fuyun Ling , Rajiv Vijayan
IPC分类号： H04B1/16
CPC分类号： H04W52/029 , Y02D70/00
摘要： Apparatus and methods for estimating the frequency of a sleep or slow clock by selectively utilizing an estimated sleep clock frequency and an estimated change in the sleep clock frequency. The disclosed apparatus includes a sleep clock frequency estimator to output a fast clock derived sleep clock frequency estimate and a sleep clock change frequency estimator to output an estimate of a change in frequency of the sleep clock. The apparatus further includes a combiner that weights at least one of the fast clock derived sleep clock frequency estimate to obtain a weighted sleep clock frequency estimate and the estimate of the change in frequency of the sleep clock to obtain a weighted estimate of the change in frequency of the sleep clock. The combiner also determines a new estimate of the sleep clock frequency using at least one of the weighted sleep clock frequency estimate and the weighted estimate of the change in frequency of the sleep clock. Complementary methods are also disclosed.
摘要翻译：通过选择性地利用估计的睡眠时钟频率和睡眠时钟频率的估计改变来估计睡眠或慢时钟的频率的装置和方法。所公开的装置包括：睡眠时钟频率估计器，用于输出快速时钟导出的睡眠时钟频率估计;以及睡眠时钟变化频率估计器，用于输出睡眠时钟的频率变化的估计。该装置还包括组合器，其对至少一个快速时钟导出的睡眠时钟频率估计进行加权以获得加权睡眠时钟频率估计和睡眠时钟的频率变化的估计，以获得频率变化的加权估计的睡眠时钟。组合器还使用加权睡眠时钟频率估计和睡眠时钟的频率变化的加权估计中的至少一个来确定睡眠时钟频率的新估计。还公开了互补方法。

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