公开(公告)号：US20070115795A1

公开(公告)日：2007-05-24

申请号：US11325980

申请日：2006-01-04

申请人： Dhananjay Gore ,  Ravi Palanki

发明人： Dhananjay Gore ,  Ravi Palanki

IPC分类号： H04J11/00

CPC分类号： H04B7/2621 ,  H04B1/00 ,  H04B1/0003 ,  H04L5/0007 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2614

摘要： Techniques for transmitting data using single-carrier frequency division multiple access (SC-FDMA) multiplexing schemes are described. In one aspect, data is sent on sets of adjacent subbands that are offset from one another to achieve frequency diversity. A terminal may be assigned a set of N adjacent subbands that is offset by less than N (e.g., N/2) subbands from another set of N adjacent subbands assigned to another terminal and would then observe interference on only subbands that overlap. In another aspect, a multi-carrier transmission symbol is generated with multi-carrier SC-FDMA. Multiple waveforms carrying modulation symbols in the time domain on multiple sets of subbands are generated. The multiple waveforms are pre-processed (e.g., cyclically delayed by different amounts) to obtain pre-processed waveforms, which are combined (e.g., added) to obtain a composite waveform. A cyclic prefix is appended to the composite waveform to generate the multi-carrier transmission symbol.

摘要翻译： 描述了使用单载波频分多址（SC-FDMA）复用方案发送数据的技术。 在一个方面，在彼此偏移的相邻子带的集合上发送数据以实现频率分集。 可以向终端分配一组N个相邻子带，该组N个相邻子带从分配给另一终端的N个相邻子带的另一组偏移小于N（例如N / 2）个子带，然后将仅对重叠的子带观察到干扰。 在另一方面，使用多载波SC-FDMA生成多载波传输符号。 产生在多个子带组上的时域中承载调制符号的多个波形。 多个波形被预处理（例如，循环地延迟不同的量）以获得预处理的波形，其被组合（例如，添加）以获得复合波形。 循环前缀附加到复合波形以产生多载波传输符号。

公开(公告)号：US20070098050A1

公开(公告)日：2007-05-03

申请号：US11511735

申请日：2006-08-28

申请人： Aamod Khandekar ,  Avneesh Agrawal ,  Dhananjay Gore

发明人： Aamod Khandekar ,  Avneesh Agrawal ,  Dhananjay Gore

IPC分类号： H04B1/00 ,  H04K1/10

CPC分类号： H04J13/102 ,  H04B1/713 ,  H04L5/0026 ,  H04L5/0051 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03866

摘要： Pilot symbols transmitted from different sectors of a same base station are multiplied with a same cell specific scrambling code and a first code having low cross correlation and second codes having low cross correlation. The second code is constant over the length of the first code, but may vary for repetitions of the first code.

摘要翻译： 从相同基站的不同扇区发送的导频符号与相同的小区特定扰码和具有低互相关的第一码和具有低互相关的第二码相乘。 第二个代码在第一个代码的长度上是恒定的，但是对于第一个代码的重复可能会有所不同。

公开(公告)号：US20050163194A1

公开(公告)日：2005-07-28

申请号：US11022489

申请日：2004-12-22

申请人： Dhananjay Gore ,  Avneesh Agrawal ,  Arvind Keerthi

发明人： Dhananjay Gore ,  Avneesh Agrawal ,  Arvind Keerthi

IPC分类号： H04B1/713 ,  H04B7/005 ,  H04L5/02

CPC分类号： H04B1/7143 ,  H04B1/715 ,  H04B2001/7154 ,  H04L5/023 ,  H04W52/38 ,  H04W52/42 ,  H04W52/44

摘要： Interference may be controlled by selectively blanking or attenuating transmit powers. A method of estimating interference caused by a transmitting entity in a wireless communication system comprises determining a desired level of accuracy in an interference estimate, determining a required number of blanks per subband set to achieve the desired level of accuracy, inserting the required number of blanks per subband set into a frequency hopping (FH) sequence, and transmitting according to the FH sequence.

摘要翻译： 可以通过选择性地消隐或衰减发射功率来控制干扰。 一种在无线通信系统中估计由发射实体引起的干扰的方法包括：确定干扰估计中期望的准确度水平，确定每个子带集所需的空白数以达到期望的精度水平，插入所需数量的空白 每个子带设置成跳频（FH）序列，并根据FH序列进行发送。

公开(公告)号：US20060034173A1

公开(公告)日：2006-02-16

申请号：US11022144

申请日：2004-12-22

申请人： Edward Teague ,  Aamod Khandekar ,  Dhananjay Gore

发明人： Edward Teague ,  Aamod Khandekar ,  Dhananjay Gore

IPC分类号： H04J1/16 ,  H04J3/14

CPC分类号： H04W76/25 ,  H04W72/04

摘要： A method and apparatus are provided to manage the assignment transmission resource of forward and reserve link that is assigned to transmitting entity for a period of time. An indication of a gap is provided whenever the transmitting entity is not transmitting actual data packets (e.g. whole or part of intended data or content), yet the transmitting entity is to maintain the assignment of the allocated resource. For example, an erasure signature packet comprising a first data pattern is transmitted on the assigned resource when there is no actual data to transmit on the assigned resource.

公开(公告)号：US20050163258A1

公开(公告)日：2005-07-28

申请号：US11022513

申请日：2004-12-22

申请人： Dhananjay Gore ,  Ashok Mantravadi ,  Fuyun Ling ,  Krishna Mukkavilli ,  Raghuraman Krishnamoorthi

发明人： Dhananjay Gore ,  Ashok Mantravadi ,  Fuyun Ling ,  Krishna Mukkavilli ,  Raghuraman Krishnamoorthi

IPC分类号： H04L25/02 ,  H04L27/26 ,  H04B1/10

CPC分类号： H04L25/0224 ,  H04L25/0212 ,  H04L25/022

摘要： Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, time filtering is utilized. Time filtering is utilized to combat excess delay spread effects in channel estimation. The time filtering is performed in the presence of staggered pilots and helps in improving the channel estimate in the presence of excess delay spread.

摘要翻译： 描述了具有超延迟扩展的OFDM系统的导频传输和信道估计技术。 为了减轻多余延迟扩展的有害影响，利用时间滤波。 利用时间滤波来对付信道估计中的多余延迟扩散效应。 在存在交错导频的情况下执行时间滤波，并有助于在存在超延迟扩展的情况下改善信道估计。

公开(公告)号：US20050163083A1

公开(公告)日：2005-07-28

申请号：US11046121

申请日：2005-01-28

申请人： Ashok Mantravadi ,  Anand Subramaniam ,  Krishnomunby Viswanachan ,  Dhananjay Gore

发明人： Ashok Mantravadi ,  Anand Subramaniam ,  Krishnomunby Viswanachan ,  Dhananjay Gore

IPC分类号： H04B7/216 ,  H04H1/00 ,  H04H20/28 ,  H04H20/33 ,  H04H20/42 ,  H04H20/72 ,  H04J11/00 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26

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：US20050157801A1

公开(公告)日：2005-07-21

申请号：US10821706

申请日：2004-04-09

申请人： Dhananjay Gore ,  Avneesh Agrawal

发明人： Dhananjay Gore ,  Avneesh Agrawal

IPC分类号： H04L25/02 ,  H04L27/26 ,  H04K1/10

CPC分类号： H04L25/0226 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0202 ,  H04L25/0212 ,  H04L27/2607 ,  H04L27/2647

摘要： Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, the number of pilot subbands is greater than the cyclic prefix length. This “oversampling” may be achieved by using more pilot subbands in each symbol period or different sets of pilot subbands in different symbol periods. In one channel estimation technique, first and second groups of received pilot symbols are obtained for first and second pilot subband sets, respectively, and used to derive first and second frequency response estimates, respectively. First and second impulse response estimates are derived based on the first and second frequency response estimates, respectively, and used to derive a third impulse response estimate having more taps than the number of pilot subbands in either set.

摘要翻译： 描述了具有超延迟扩展的OFDM系统的导频传输和信道估计技术。 为了减轻多余的延迟扩展的有害影响，导频子带的数量大于循环前缀长度。 这种“过采样”可以通过在每个符号周期中使用更多的导频子带或在不同的符号周期内使用不同的导频子带集来实现。 在一个信道估计技术中，分别为第一和第二导频子带集获得第一组和第二组接收导频符号，并分别用于导出第一和第二频率响应估计。 基于第一和第二频率响应估计分别导出第一和第二脉冲响应估计，并且用于导出具有比两组中的导频子带数更多的抽头的第三脉冲响应估计。

公开(公告)号：US20120026959A1

公开(公告)日：2012-02-02

申请号：US13252787

申请日：2011-10-04

申请人： David Julian ,  Dhananjay Gore

发明人： David Julian ,  Dhananjay Gore

IPC分类号： H04W72/04

CPC分类号： H04W48/12 ,  H04L5/0037 ,  H04L5/0053 ,  H04W72/042

摘要： Provided is a more efficient manner of transmitting a control message to reach into a neighboring sector (e.g., inter-sector) of a wireless network environment. The control message can be utilized for purposes such as handoff, indicating an amount of interference, inter-sector power control for managing inter-sector interference, sector loading, or other control messages. The control message can be placed on a set of resources utilizing planned reuse and/or statistical reuse. Statistical reuse includes selecting a subcarrier set for carrying the control message. According to some aspects, the control message can be sent over a backhaul channel.

摘要翻译： 提供了一种更有效的方式来发送控制消息以到达无线网络环境的相邻扇区（例如，扇区间）。 控制消息可以用于切换，指示干扰量，用于管理扇区间干扰的扇区间功率控制，扇区加载或其他控制消息。 控制消息可以利用计划的重用和/或统计重用来放置在一组资源上。 统计重用包括选择用于携带控制消息的子载波集合。 根据一些方面，控制消息可以通过回程通道发送。

公开(公告)号：US20100056123A1

公开(公告)日：2010-03-04

申请号：US12199413

申请日：2008-08-27

申请人： David Julian ,  Dhananjay Gore

发明人： David Julian ,  Dhananjay Gore

IPC分类号： H04M3/00 ,  H04Q7/20

CPC分类号： H04W48/12 ,  H04L5/0037 ,  H04L5/0053 ,  H04W72/042

摘要： Provided is a more efficient manner of transmitting a control message to reach into a neighboring sector (e.g., inter-sector) of a wireless network environment. The control message can be utilized for purposes such as handoff, indicating an amount of interference, inter-sector power control for managing inter-sector interference, sector loading, or other control messages. The control message can be placed on a set of resources utilizing planned reuse and/or statistical reuse. Statistical reuse includes selecting a subcarrier set for carrying the control message. According to some aspects, the control message can be sent over a backhaul channel.

摘要翻译： 提供了一种更有效的方式来发送控制消息以到达无线网络环境的相邻扇区（例如，扇区间）。 控制消息可以用于切换，指示干扰量，用于管理扇区间干扰的扇区间功率控制，扇区加载或其他控制消息。 控制消息可以利用计划的重用和/或统计重用来放置在一组资源上。 统计重用包括选择用于携带控制消息的子载波集合。 根据一些方面，控制消息可以通过回程通道发送。

公开(公告)号：US07336719B2

公开(公告)日：2008-02-26

申请号：US09999438

申请日：2001-11-28

申请人： Dhananjay Gore ,  Sumeet Sandhu ,  Shilpa Talwar ,  Arogyaswami J. Paulraj

发明人： Dhananjay Gore ,  Sumeet Sandhu ,  Shilpa Talwar ,  Arogyaswami J. Paulraj

IPC分类号： H04B7/02

CPC分类号： H04B7/0615 ,  H04L1/0656

摘要： The present invention provides a diversity transmission system. The diversity transmission system includes a method and system of diversity transmission through a wireless channel formed between multiple transmission antennae of a transceiver and a subscriber unit. The method includes forming a stream of symbols from an incoming data stream. A plurality of the symbols are selected forming a data vector. A maximum delay spread through the wireless channel is determined. The maximum delay spread is generally determined as a multiple of a sample time spacing between elements of the data vector. A plurality of diversity vectors are generated based upon the data vector and the maximum delay spread, each diversity vector includes a plurality of elements. Corresponding elements of the diversity vectors are simultaneously transmitted, each diversity vector transmitted from at least one corresponding antenna of a plurality of spatially separate antennae. This embodiment can further include repeatedly simultaneously transmitting corresponding elements of the diversity vectors until all elements of the diversity vectors have been transmitted, each diversity vector transmitted from at least one corresponding antenna of a plurality of spatially separate antennae.

摘要翻译： 本发明提供一种分集传输系统。 分集传输系统包括通过在收发机的多个发射天线和用户单元之间形成的无线信道的分集传输的方法和系统。 该方法包括从输入数据流形成符号流。 选择形成数据矢量的多个符号。 确定通过无线信道扩展的最大延迟。 最大延迟扩展通常被确定为数据向量的元素之间的采样时间间隔的倍数。 基于数据矢量和最大延迟扩展来生成多个分集向量，每个分集向量包括多个元素。 同时发送分集向量的相应元素，每个分集向量从多个空间分离的天线中的至少一个对应的天线发送。 该实施例还可以包括重复同时发送分集向量的相应元素，直到已经发送了分集向量的所有元素，每个分集向量从多个空间分离的天线中的至少一个对应的天线发送。