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81. 发明申请

US20090161776A1 SYSTEM AND METHOD FOR FREQUENCY DIVERSITY 有权
标题翻译：频域多样性的系统与方法
公开(公告)号：US20090161776A1
公开(公告)日：2009-06-25
申请号：US12179505
申请日：2008-07-24
申请人： Michael Mao Wang , Fuyung Ling , Murali Ramaswamy Chari , Rajiv Vijayan
发明人： Michael Mao Wang , Fuyung Ling , Murali Ramaswamy Chari , Rajiv Vijayan
IPC分类号： H04L27/28 , H04L27/00
CPC分类号： H04L5/0044 , H03M13/271 , H03M13/2957 , H03M13/31 , H04L1/0066 , H04L1/0071 , H04L5/0007 , H04L5/0042 , H04L5/0064 , H04L27/2602 , H04L27/2634
摘要： A system and method for frequency diversity uses interleaving in a wireless communication system utilizing orthogonal frequency division multiplexing (OFDM) with various FFT sizes. Subcarriers of one or more interlaces are interleaved in a bit reversal fashion and the one or more interlaces are interleaved.
摘要翻译：用于频率分集的系统和方法使用利用具有各种FFT大小的正交频分复用（OFDM）的无线通信系统中的交织。一个或多个交错的子载波以位反向方式进行交织，并且所述一个或多个交错交织。

82. 发明申请

US20080317142A1 SYSTEM AND METHOD FOR FREQUENCY DIVERSITY 审中-公开
标题翻译：频域多样性的系统与方法
公开(公告)号：US20080317142A1
公开(公告)日：2008-12-25
申请号：US11929927
申请日：2007-10-30
申请人： Michael Mao Wang , Fuyun Ling , Murali Ramaswamy Chari , Rajiv Vijayan
发明人： Michael Mao Wang , Fuyun Ling , Murali Ramaswamy Chari , Rajiv Vijayan
IPC分类号： H04L27/28
CPC分类号： H04L27/2601 , H04L1/005 , H04L1/0066 , H04L1/0071 , H04L5/0007 , H04L5/0044 , H04L5/0064 , H04L5/0083 , H04L27/2626
摘要： A system and method for frequency diversity uses interleaving in a wireless communication system utilizing orthogonal frequency division multiplexing (OFDM) with various FFT sizes. Subcarriers of one or more interlaces are interleaved in a bit reversal fashion and the one or more interlaces are interleaved in the bit reversal fashion.
摘要翻译：用于频率分集的系统和方法使用利用具有各种FFT大小的正交频分复用（OFDM）的无线通信系统中的交织。一个或多个交错的子载波以位反向方式进行交织，并且该一个或多个交织以比特反转方式进行交织。

83. 发明申请

US20070153687A1 METHOD AND APPARATUS FOR ADAPTIVE SERVER SELECTION IN A DATA COMMUNICATION SYSTEM 有权
标题翻译：数据通信系统中自适应服务器选择的方法和装置
公开(公告)号：US20070153687A1
公开(公告)日：2007-07-05
申请号：US11686772
申请日：2007-03-15
申请人： Rashid Attar , Rajiv Vijayan , Roberto Padovani , Nagabhushana Sindhushayana , Qiang Wu , Peter Black , Eduardo Esteves
发明人： Rashid Attar , Rajiv Vijayan , Roberto Padovani , Nagabhushana Sindhushayana , Qiang Wu , Peter Black , Eduardo Esteves
IPC分类号： H04L12/26 , H04Q7/00
CPC分类号： H04W48/20 , H04L1/20 , H04W52/24 , H04W52/26
摘要： Methods and apparatus for selecting a serving sector in a high rate data (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which a sector of an Access Point may send data packets to an Access Terminal. The sector is selected by the Access Terminal to achieve the highest data throughput while maintaining a targeted packet error rate. The Access Terminal employs various methods to evaluate quality metrics of forward and reverse links from and to different sectors, and uses the quality metrics to select the sector to send data packets to the Access Terminal.
摘要翻译：公开了在高速率数据（HDR）通信系统中选择服务扇区的方法和装置。示例性HDR通信系统定义了一组数据速率，在该组数据速率下，接入点的扇区可以向接入终端发送数据分组。访问终端选择该扇区以实现最高的数据吞吐量，同时保持目标分组错误率。接入终端采用各种方法来评估来自不同扇区的前向和反向链路的质量度量，并使用质量度量来选择扇区将数据分组发送到接入终端。

84. 发明申请

US20070140322A1 Apparatus and methods for timing recovery in a wireless transceiver 有权
标题翻译：无线收发器中定时恢复的装置和方法
公开(公告)号：US20070140322A1
公开(公告)日：2007-06-21
申请号：US11303589
申请日：2005-12-15
申请人： Michael Wang , Bojan Vrcelj , Fuyun Ling , Rajiv Vijayan
发明人： Michael Wang , Bojan Vrcelj , Fuyun Ling , Rajiv Vijayan
IPC分类号： H04B1/00
CPC分类号： H04L27/2656 , H04L27/261 , H04L27/2675
摘要： Apparatus and methods for use in a wireless communication system are disclosed for recovery of timing tracking in a device, such as a wireless transceiver, after decoding errors occur due to incorrect timing tracking. In particular, the disclosed methods and apparatus recover timing tracking by monitoring a decoded signal in the transceiver for decoding errors occurring during a first frame, determining whether a number of decoding errors is greater than a predetermined amount, reacquiring a first pilot channel at a start of a subsequently received second frame when the number of decoding errors is determined to be greater than the predetermined amount, and resetting timing tracking of the transceiver based on the reacquired first pilot channel.
摘要翻译：在无线通信系统中使用的装置和方法被公开用于在诸如无线收发器的设备中恢复定时跟踪，在由于不正确的定时跟踪而导致解码错误之后。具体地，所公开的方法和装置通过监视收发器中的解码信号来恢复定时跟踪，以解码在第一帧期间发生的错误，确定解码错误的数量是否大于预定量，在开始时重新获取第一导频信道当确定解码错误的数量大于预定量时，随后接收到的第二帧，并且基于重新获取的第一导频信道来重置收发信机的定时跟踪。

85. 发明申请

US20060195752A1 Power saving method for coded transmission 有权
标题翻译：编码传输省电方式
公开(公告)号：US20060195752A1
公开(公告)日：2006-08-31
申请号：US11335013
申请日：2006-01-18
申请人： Gordon Walker , Chinnappa Ganapathy , Dhinak Radhakrishnan , Fuyun Ling , Rajiv Vijayan
发明人： Gordon Walker , Chinnappa Ganapathy , Dhinak Radhakrishnan , Fuyun Ling , Rajiv Vijayan
IPC分类号： H04L1/18
CPC分类号： H04L1/0053 , H04L1/0045 , H04L1/0057 , H04L1/0065 , H04L1/0071 , H04L1/0083
摘要： Conserving power for coded transmissions comprises ceasing to process parity packets once associated data packets are deemed correct or corrected. Once data packets are deemed correct or corrected, the receiving unit can shut off during the transmission of parity packets.
摘要翻译：编码传输的节省功率包括：一旦相关联的数据分组被认为是正确的或纠正的，停止处理奇偶分组。一旦数据分组被认为是正确的或纠正的，接收单元可以在传输奇偶分组期间关闭。

86. 发明申请

US20050135308A1 Frequency division multiplexing 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个数据流的频分复用
公开(公告)号：US20050135308A1
公开(公告)日：2005-06-23
申请号：US10968614
申请日：2004-10-18
申请人： Rajiv Vijayan , Gordon Walker , Raghu Krishnamoorthi , Ramaswamy Murali
发明人： Rajiv Vijayan , Gordon Walker , Raghu Krishnamoorthi , Ramaswamy Murali
IPC分类号： H04L27/28
CPC分类号： H04L27/0008 , H04L5/0007 , H04L5/0041 , H04L5/0044 , H04L5/0051 , H04L5/0064 , H04L25/022 , H04L25/0226 , H04L25/0228 , H04L27/2604 , H04L27/2605 , H04L27/2647 , Y02D70/10
摘要： Techniques for multiplexing multiple data streams using frequency division multiplexing (FDM) in an OFDM system are described. M disjoint “interlaces” are formed with U usable subbands. Each interlace is a different set of S subbands, where U=M·S. The subbands for each interlace are interlaced with the subbands for each of the other M−1 interlaces. M slots may be defined for each symbol period and assigned slot indices 1 through M. The slot indices may be mapped to interlaces such that (1) frequency diversity is achieved for each slot index and (2) the interlaces used for pilot transmission have varying distances to the interlaces used for each slot index, which improves channel estimation performance. Each data stream may be processed as data packets of a fixed size, and different numbers of slots may be used for each data packet depending on the coding and modulation scheme used for the data packet.
摘要翻译：描述了在OFDM系统中使用频分复用（FDM）来复用多个数据流的技术。 M个不相交的“交错”与U个可用的子带形成。每个交错是S个子带的不同集合，其中U = M.S。用于每个交错的子带与用于其它M-1交错的每个子带进行隔行扫描。可以为每个符号周期和分配的时隙索引1到M定义M个时隙。时隙索引可以被映射到交织，使得（1）针对每个时隙索引实现频率分集，以及（2）用于导频传输的交织具有不同的到每个时隙索引用于交织的距离，这提高了信道估计性能。每个数据流可以被处理为固定大小的数据分组，并且根据用于数据分组的编码和调制方案，每个数据分组可以使用不同数量的时隙。

87. 发明申请

US20050122928A1 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：US20050122928A1
公开(公告)日：2005-06-09
申请号：US10968787
申请日：2004-10-18
申请人： Rajiv Vijayan , Fuyun Ling , Gordon Walker , Ramaswamy Murali , Ashok Mantravadi , Anand Subramaniam , Krishnamurthy Viswanathan
发明人： Rajiv Vijayan , Fuyun Ling , Gordon Walker , Ramaswamy Murali , Ashok Mantravadi , Anand Subramaniam , Krishnamurthy Viswanathan
IPC分类号： H04L12/18 , H04L12/56 , H04W74/04 , H04W88/08 , H04J3/24
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。

88. 发明授权

US06873606B2 Rate adaptive transmission scheme for MIMO systems 有权
标题翻译： MIMO系统速率自适应传输方案
公开(公告)号：US06873606B2
公开(公告)日：2005-03-29
申请号：US10367234
申请日：2003-02-14
申请人： Avneesh Agrawal , Rajiv Vijayan , Tamer Kadous
发明人： Avneesh Agrawal , Rajiv Vijayan , Tamer Kadous
IPC分类号： H04B7/00 , H04B7/005 , H04B7/04 , H04B7/06 , H04B7/08 , H04J99/00 , H04L1/00 , H04L1/06 , H04B1/02
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。

89. 发明申请

US20050058089A1 Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system 有权
标题翻译：在无线多载波通信系统中多路复用和传输多个数据流
公开(公告)号：US20050058089A1
公开(公告)日：2005-03-17
申请号：US10932586
申请日：2004-09-01
申请人： Rajiv Vijayan , Aamod Khandekar , Fuyun Ling , Gordon Walker , Ramaswamy Murali
发明人： Rajiv Vijayan , Aamod Khandekar , Fuyun Ling , Gordon Walker , Ramaswamy Murali
IPC分类号： H04H20/00 , H04J3/24 , H04L1/00 , H04L5/02 , H04L5/06 , H04L25/02 , H04L27/26 , H04W4/06 , H04W28/06 , H04W72/04
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。

90. 发明申请

US20050013239A1 Rate adaptive transmission scheme for mimo systems 有权
标题翻译： mimo系统的速率自适应传输方案
公开(公告)号：US20050013239A1
公开(公告)日：2005-01-20
申请号：US10919698
申请日：2004-08-16
申请人： Avneesh Agrawal , Rajiv Vijayan , Tamer Kadous
发明人： Avneesh Agrawal , Rajiv Vijayan , Tamer Kadous
IPC分类号： H04B7/00 , H04B7/005 , H04B7/04 , H04B7/06 , H04B7/08 , H04J99/00 , H04L1/00 , H04L1/06 , H04J11/00 , H04Q7/00
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。

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