公开(公告)号：US20050141475A1

公开(公告)日：2005-06-30

申请号：US10968702

申请日：2004-10-18

申请人： Rajiv Vijayan ,  Gordon Walker ,  Bruce Collins ,  Dhinakar Radhakrishnan ,  Ramaswamy Murali

发明人： Rajiv Vijayan ,  Gordon Walker ,  Bruce Collins ,  Dhinakar Radhakrishnan ,  Ramaswamy Murali

IPC分类号： H04W4/06 ,  H04W52/02 ,  H04Q7/20

CPC分类号： H04W4/06 ,  H04W52/0216 ,  H04W72/005 ,  Y02D70/10

摘要： Techniques for transmitting overhead information to facilitate efficient reception of individual data streams are described. A base station may transmit multiple data streams on multiple data channels (or MLCs). The MLCs may be transmitted at different times and on different frequency subbands. The time-frequency location of each MLC may change over time. The overhead information indicates the time-frequency location of each MLC and may be sent as “composite” and “embedded” overhead information. The composite overhead information indicates the time-frequency locations of all MLCs and is sent periodically in each super-frame. A wireless device receives the composite overhead information, determines the time-frequency location of each MLC of interest, and receives each MLC at the indicated time-frequency location. The embedded overhead information for each MLC indicates the time-frequency location of that MLC in the next super-frame and is transmitted along with the payload of the MLC in the current super-frame.

摘要翻译： 描述了用于发送开销信息以促进单个数据流的有效接收的技术。 基站可以在多个数据信道（或MLC）上发送多个数据流。 MLC可以在不同的时间和在不同的频率子带上传输。 每个MLC的时间 - 频率位置可能随时间而变化。 开销信息指示每个MLC的时间 - 频率位置，并且可以作为“复合”和“嵌入”开销信息发送。 复合开销信息表示所有MLC的时间 - 频率位置，并且在每个超帧中周期性地发送。 无线设备接收复合开销信息，确定感兴趣的每个MLC的时间 - 频率位置，并且在指定的时间 - 频率位置接收每个MLC。 每个MLC的嵌入式开销信息指示该MLC在下一个超帧中的时间 - 频率位置，并与当前超帧中的MLC的有效载荷一起发送。

公开(公告)号：US08599764B2

公开(公告)日：2013-12-03

申请号：US10968702

申请日：2004-10-18

申请人： Rajiv Vijayan ,  Kent Gordon Walker ,  Richard Doil Lane ,  Dhinakar Radhakrishnan ,  Ramaswamy Murali

发明人： Rajiv Vijayan ,  Kent Gordon Walker ,  Richard Doil Lane ,  Dhinakar Radhakrishnan ,  Ramaswamy Murali

IPC分类号： H04W4/00

CPC分类号： H04W4/06 ,  H04W52/0216 ,  H04W72/005 ,  Y02D70/10

摘要： Techniques for transmitting overhead information to facilitate efficient reception of individual data streams are described. A base station may transmit multiple data streams on multiple data channels (or MLCs). The MLCs may be transmitted at different times and on different frequency subbands. The time-frequency location of each MLC may change over time. The overhead information indicates the time-frequency location of each MLC and may be sent as “composite” and “embedded” overhead information. The composite overhead information indicates the time-frequency locations of all MLCs and is sent periodically in each super-frame. A wireless device receives the composite overhead information, determines the time-frequency location of each MLC of interest, and receives each MLC at the indicated time-frequency location. The embedded overhead information for each MLC indicates the time-frequency location of that MLC in the next super-frame and is transmitted along with the payload of the MLC in the current super-frame.

摘要翻译： 描述了用于发送开销信息以促进单个数据流的有效接收的技术。 基站可以在多个数据信道（或MLC）上发送多个数据流。 MLC可以在不同的时间和在不同的频率子带上传输。 每个MLC的时间 - 频率位置可能随时间而变化。 开销信息指示每个MLC的时间 - 频率位置，并且可以作为“复合”和“嵌入”开销信息发送。 复合开销信息表示所有MLC的时间 - 频率位置，并且在每个超帧中周期性地发送。 无线设备接收复合开销信息，确定感兴趣的每个MLC的时间 - 频率位置，并且在指定的时间 - 频率位置接收每个MLC。 每个MLC的嵌入式开销信息指示该MLC在下一个超帧中的时间 - 频率位置，并与当前超帧中的MLC的有效载荷一起发送。

公开(公告)号：US20130177010A9

公开(公告)日：2013-07-11

申请号：US10968702

申请日：2004-10-18

申请人： Rajiv Vijayan ,  Gordon Kent Walker ,  Bruce Collins ,  Dhinakar Radhakrishnan ,  Ramaswamy Murali

发明人： Rajiv Vijayan ,  Gordon Kent Walker ,  Bruce Collins ,  Dhinakar Radhakrishnan ,  Ramaswamy Murali

IPC分类号： H04W4/06 ,  H04W52/02

CPC分类号： H04W4/06 ,  H04W52/0216 ,  H04W72/005 ,  Y02D70/10

摘要： Techniques for transmitting overhead information to facilitate efficient reception of individual data streams are described. A base station may transmit multiple data streams on multiple data channels (or MLCs). The MLCs may be transmitted at different times and on different frequency subbands. The time-frequency location of each MLC may change over time. The overhead information indicates the time-frequency location of each MLC and may be sent as “composite” and “embedded” overhead information. The composite overhead information indicates the time-frequency locations of all MLCs and is sent periodically in each super-frame. A wireless device receives the composite overhead information, determines the time-frequency location of each MLC of interest, and receives each MLC at the indicated time-frequency location. The embedded overhead information for each MLC indicates the time-frequency location of that MLC in the next super-frame and is transmitted along with the payload of the MLC in the current super-frame.

摘要翻译： 描述了用于发送开销信息以促进单个数据流的有效接收的技术。 基站可以在多个数据信道（或MLC）上发送多个数据流。 MLC可以在不同的时间和在不同的频率子带上传输。 每个MLC的时间 - 频率位置可能随时间而变化。 开销信息指示每个MLC的时间 - 频率位置，并且可以作为“复合”和“嵌入”开销信息发送。 复合开销信息表示所有MLC的时间 - 频率位置，并且在每个超帧中周期性地发送。 无线设备接收复合开销信息，确定感兴趣的每个MLC的时间 - 频率位置，并且在指定的时间 - 频率位置接收每个MLC。 每个MLC的嵌入式开销信息指示该MLC在下一个超帧中的时间 - 频率位置，并与当前超帧中的MLC的有效载荷一起发送。

公开(公告)号：US20070298789A1

公开(公告)日：2007-12-27

申请号：US11752291

申请日：2007-05-22

申请人： Ramaswamy Murali ,  Gordon Walker ,  Rajiv Vijayan

发明人： Ramaswamy Murali ,  Gordon Walker ,  Rajiv Vijayan

IPC分类号： H04B7/00

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。

公开(公告)号：US20050101319A1

公开(公告)日：2005-05-12

申请号：US10968613

申请日：2004-10-18

申请人： Ramaswamy Murali ,  Gordon Walker ,  Rajiv Vijayan

发明人： Ramaswamy Murali ,  Gordon Walker ,  Rajiv Vijayan

IPC分类号： H04H20/71 ,  G06F20060101 ,  G06Q50/30 ,  H04B7/00 ,  H04N7/08

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。

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。

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。

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。

公开(公告)号：US07366462B2

公开(公告)日：2008-04-29

申请号：US10968613

申请日：2004-10-18

申请人： Ramaswamy Murali ,  Gordon Kent Walker ,  Rajiv Vijayan

发明人： Ramaswamy Murali ,  Gordon Kent Walker ,  Rajiv Vijayan

IPC分类号： H04H7/00

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。

公开(公告)号：US20090190675A1

公开(公告)日：2009-07-30

申请号：US11933231

申请日：2007-10-31

申请人： Fuyun Ling ,  Alok Kumar Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Bojan Vrcelj

发明人： Fuyun Ling ,  Alok Kumar Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Bojan Vrcelj

IPC分类号： H04L27/28 ,  H04J3/06

CPC分类号： H04L27/2675 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/0064 ,  H04L7/042 ,  H04L25/0212 ,  H04L25/0216 ,  H04L25/0224 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

摘要： In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least S1 identical pilot-1 sequences of length L1 and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2>L1, S1·L1=N, and S2·L2=N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot-1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).

摘要翻译： 在OFDM系统中，发射机在第一组子带上广播第一TDM导频，随后在每帧中的第二组子带上接收第二TDM导频。 每个组中的子带从N个总子带中选出，使得（1）第一TDM导频的OFDM符号包含长度为L1的至少S1个相同的导频1序列，以及（2）第二TDM导频的OFDM符号包含 至少S2个长度为L2的导频-2序列，其中L2> L1，S1.L1 = N，S2.L2 = N。 发射机还可以广播FDM导频。 接收机处理第一TDM导频以获得帧定时（例如，通过执行不同导频-1序列之间的相关）并且进一步处理第二TDM导频以获得符号定时（例如，通过检测导出的信道脉冲响应估计的开始 从第二TDM导频）。