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71. 发明授权

US08175123B2 Collection window positioning using time tracking information 有权
标题翻译：收集窗口定位使用时间跟踪信息
公开(公告)号：US08175123B2
公开(公告)日：2012-05-08
申请号：US11371837
申请日：2006-03-08
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Mao Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Mao Wang
IPC分类号： H04J3/08
CPC分类号： H04L27/2662 , H04L5/0007 , H04L5/0048 , H04L25/0216 , H04L25/022 , H04L25/0228 , H04L27/261 , H04L27/265 , H04L27/2665 , H04L27/2679
摘要： A method for positioning a collection window for a Fourier transform function is disclosed. A first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol are received. The first OFDM symbol comprises a plurality of frequency division multiplexed (FDM) symbols. The first OFDM symbol is characterized by at least two of the following: a delay spread, a first arriving path (FAP), or a last arriving path (LAP). A channel location is estimated from a channel impulse response. A point relative to the channel location is selected. A beginning of the collection window is positioned for the second OFDM symbol at the selected point. Alternatively, a point is selected at a first location relative to the channel location using a first algorithm if a delay spread is less than a predetermined length. The selected point is chosen at a second location relative to the channel location using a second algorithm if the delay spread is greater than the predetermined length.
摘要翻译：公开了一种用于定位用于傅立叶变换函数的收集窗口的方法。接收第一正交频分复用（OFDM）符号和第二OFDM符号。第一OFDM符号包括多个频分复用（FDM）符号。第一OFDM符号的特征在于以下至少两个：延迟扩展，第一到达路径（FAP）或最后到达路径（LAP）。从信道脉冲响应估计信道位置。选择相对于通道位置的点。收集窗口的开始位于所选点处的第二OFDM符号。或者，如果延迟扩展小于预定长度，则使用第一算法在相对于信道位置的第一位置处选择点。如果延迟扩展大于预定长度，则使用第二算法在相对于信道位置的第二位置处选择所选择的点。

72. 发明授权

US07725799B2 Power savings in hierarchically coded modulation 有权
标题翻译：省电分层编码调制
公开(公告)号：US07725799B2
公开(公告)日：2010-05-25
申请号：US11096320
申请日：2005-03-31
申请人： Gordon Kent Walker , Rajiv Vijayan , Seong Taek Chung , Murali Ramaswamy Chari , Fuyun Ling
发明人： Gordon Kent Walker , Rajiv Vijayan , Seong Taek Chung , Murali Ramaswamy Chari , Fuyun Ling
IPC分类号： H03M13/00 , H03M13/03
CPC分类号： H04L27/3488 , H04W52/0245 , Y02D70/00
摘要： A wireless communication apparatus in a hierarchically coded modulation system can use error control mechanisms generated during decoding of base layer information to predict a probability of successful demodulation of enhancement layer information. Performance in the demodulation of the base layer correlates to performance in the demodulation of the enhancement layer. The receiver can determine whether to attempt demodulation of temporally correlated enhancement layer data based in part on the predicted probability of success. If the receiver determines not to demodulate the enhancement layer, the receiver can power down the enhancement layer demodulator, or otherwise minimize the power expended in the enhancement layer demodulator.
摘要翻译：分级编码调制系统中的无线通信装置可以使用在解码基层信息期间产生的误差控制机制来预测增强层信息的成功解调的概率。基层解调性能与增强层解调性能有关。接收机可以部分地基于预测的成功概率来确定是否尝试对时间相关的增强层数据的解调。如果接收机确定不解调增强层，则接收机可以将增强层解调器断电，或以其他方式最小化增强层解调器中消耗的功率。

73. 发明授权

US07660275B2 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：US07660275B2
公开(公告)日：2010-02-09
申请号：US10968787
申请日：2004-10-18
申请人： Rajiv Vijayan , Fuyun Ling , Gordon Kent Walker , Ramaswamy Murali , Ashok Mantravadi , Anand Subramaniam , Krishnamurthy Viswanathan, legal representative
发明人： Rajiv Vijayan , Fuyun Ling , Gordon Kent Walker , Ramaswamy 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。

74. 发明申请

US20090175210A1 MULTIPLEXING AND TRANSMISSION OF MULTIPLE DATA STREAMS IN A WIRELESS MULTI-CARRIER COMMUNICATION SYSTEM 审中-公开
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：US20090175210A1
公开(公告)日：2009-07-09
申请号：US12180305
申请日：2008-07-25
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： H04H20/71 , H04W72/04 , H04L27/28 , H04J11/00
CPC分类号： H04L5/0007 , H04L1/0065 , H04L1/0083 , H04L5/0039 , H04L5/0041 , H04L5/0044 , H04L5/0048 , H04L5/0064 , H04L5/0094
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。

75. 发明授权

US07221680B2 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：US07221680B2
公开(公告)日：2007-05-22
申请号：US10932586
申请日：2004-09-01
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： H04B7/216
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。

76. 发明申请

US20060233097A1 Time tracking for a communication system 有权
标题翻译：通讯系统的时间跟踪
公开(公告)号：US20060233097A1
公开(公告)日：2006-10-19
申请号：US11371536
申请日：2006-03-08
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Wang
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L5/0007 , H04L5/0048 , H04L25/0216 , H04L25/022 , H04L25/0228 , H04L27/261 , H04L27/265 , H04L27/2665 , H04L27/2679
摘要： A method for characterizing a communication channel is disclosed. A detection window is moved through a channel profile to accumulate tap energies in the channel profile within the detection window into an accumulated energy curve. A peak at a maximum in the accumulated energy curve is determined. A band relative to the accumulated energy curve is defined. A first arriving path (FAP) is determined using a trailing edge found near a second end of a zone in the accumulated energy curve. A leading edge is found near a first end of the zone of the accumulated energy curve. The last arriving path (LAP) is determined using the leading edge. The band defines a zone of the accumulated energy curve at or near the maximum that is within the band.
摘要翻译：公开了一种用于表征通信信道的方法。检测窗口通过通道轮廓移动，以将检测窗口内的通道轮廓中的抽头能量累积为累积的能量曲线。确定累积能量曲线中最大值的峰值。定义相对于累积能量曲线的带。使用在累积能量曲线中的区域的第二端附近发现的后沿来确定第一到达路径（FAP）。在累积能量曲线的区域的第一端附近发现前沿。最后到达路径（LAP）使用前沿确定。频带定义在频带内或附近的最大值处的累积能量曲线的区域。

77. 发明申请

US20060215539A1 Trend influenced time tracking 有权
标题翻译：趋势影响时间跟踪
公开(公告)号：US20060215539A1
公开(公告)日：2006-09-28
申请号：US11371535
申请日：2006-03-08
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Wang
IPC分类号： H04J11/00 , H04Q7/00 , H04Q7/20
CPC分类号： H04L27/2662 , H04L5/0007 , H04L5/0048 , H04L25/0216 , H04L25/022 , H04L25/0228 , H04L27/261 , H04L27/265 , H04L27/2665 , H04L27/2679
摘要： A method for determining a communication channel location is disclosed. A first subset of a plurality of channel impulse responses is averaged over a first time period to produce a first filtered channel impulse response, and a second subset of the plurality of channel impulse responses is averaged over a second time period to produce a second filtered channel impulse response. The second time period is different from the first time period, and the second subset is different from the first subset. The communication channel location is determined using the first filtered channel impulse response and the second filtered channel impulse response.
摘要翻译：公开了一种用于确定通信信道位置的方法。多个信道脉冲响应的第一子集在第一时间段内被平均以产生第一经滤波的信道脉冲响应，并且在第二时间周期上平均多个信道脉冲响应的第二子集，以产生第二滤波信道脉冲响应。第二时间段与第一时间段不同，第二子集与第一子集不同。使用第一滤波信道脉冲响应和第二滤波信道脉冲响应来确定通信信道位置。

78. 发明授权

US06353900B1 Coding system having state machine based interleaver 有权
标题翻译：编码系统具有基于状态机的交织器
公开(公告)号：US06353900B1
公开(公告)日：2002-03-05
申请号：US09172069
申请日：1998-10-13
申请人： Nagabhushana T. Sindhushayana , Jeremy Stein , Rajiv Vijayan , Fuyun Ling
发明人： Nagabhushana T. Sindhushayana , Jeremy Stein , Rajiv Vijayan , Fuyun Ling
IPC分类号： H03M1327
CPC分类号： H03M13/2957 , H03M13/2742 , H03M13/2757 , H03M13/2764 , H03M13/2771 , H03M13/2789 , H04L1/0043 , H04L1/005 , H04L1/0052 , H04L1/0066
摘要： The present invention is a novel and improved technique for performing coding with particular application to turbo, or iterative, coding techniques. In accordance with one embodiment of the invention, interleaving is performed by generating the address of a memory using a PN state generator. Data is written into a memory in sequential order, and then read out using addresses specified by the PN state generator. To deinterleave, the interleaved data is written into a memory using addresses specified by the PN state generator, and then read out in sequential order. A set of PN state generators that provide excellent coding performance is provided.
摘要翻译：本发明是用于执行具有特定应用到turbo或迭代编码技术的编码的新颖和改进的技术。根据本发明的一个实施例，通过使用PN状态发生器生成存储器的地址来执行交织。数据按顺序写入存储器，然后使用PN状态发生器指定的地址读出。要解交织，使用PN状态发生器指定的地址将交错数据写入存储器，然后按顺序读出。提供了一组提供出色编码性能的PN状态发生器。

79. 发明授权

US08826093B2 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：US08826093B2
公开(公告)日：2014-09-02
申请号：US11335013
申请日：2006-01-18
申请人： Gordon Kent Walker , Chinnappa K. Ganapathy , Dhinakar Radhakrishnan , Fuyun Ling , Rajiv Vijayan
发明人： Gordon Kent Walker , Chinnappa K. Ganapathy , Dhinakar Radhakrishnan , Fuyun Ling , Rajiv Vijayan
IPC分类号： H04L1/18 , H04L1/00
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。

80. 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。

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