公开(公告)号：US08396147B2

公开(公告)日：2013-03-12

申请号：US12757117

申请日：2010-04-09

申请人： John S. Sadowsky ,  Minnie Ho ,  Eric A. Jacobsen ,  Alexander A. Maltsev ,  Ali S. Sadri ,  Sumeet Sandhu

发明人： John S. Sadowsky ,  Minnie Ho ,  Eric A. Jacobsen ,  Alexander A. Maltsev ,  Ali S. Sadri ,  Sumeet Sandhu

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04W16/28 ,  H04B7/0408 ,  H04L27/2602 ,  H04W74/02

摘要： A MIMO transmitter and method for transmitting a group of sequential OFDM symbols on a downlink channel using a plurality of antennas is disclosed herein. Groups of OFDM subcarriers are individually modulated in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers, corresponding symbol-modulated subcarriers are combined for transmission on each of a plurality of spatial channels, and beamforming is performed on the combined symbol-modulated subcarriers for transmission over the spatial channels. The channel comprises a plurality of the groups of the OFDM subcarriers and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments. The spatial-frequency subcarrier modulation assignments for each group are determined based on feedback by a receiver, which is determined from spatial channel characteristics of the spatial channels.

摘要翻译： 这里公开了一种用于使用多个天线在下行链路信道上发送一组顺序OFDM符号的MIMO发射器和方法。 根据空间 - 频率副载波调制分配对OFDM子载波组进行单独调制，以生成符号调制子载波组，将多个空间信道中的每一个组合对应的符号调制副载波进行传输，并对组合 用于在空间信道上传输的符号调制副载波。 信道包括多个OFDM子载波组和每个子载波组内的OFDM子载波，并且在每组顺序OFDM符号内具有相同的空间频率副载波调制分配。 基于由空间信道的空间信道特性确定的接收机的反馈来确定每个组的空间频率副载波调制分配。

公开(公告)号：US08194777B2

公开(公告)日：2012-06-05

申请号：US12836929

申请日：2010-07-15

申请人： Sumeet Sandhu

发明人： Sumeet Sandhu

IPC分类号： H04L1/02

CPC分类号： H04L27/2602 ,  H04L1/0068 ,  H04L1/0071 ,  H04L5/0023 ,  H04L5/0046 ,  H04L25/0216 ,  H04L27/3416

摘要： An apparatus and associated methods for performing space-frequency interleaving in a multicarrier wireless communication system is generally described.

公开(公告)号：US08126077B2

公开(公告)日：2012-02-28

申请号：US12643035

申请日：2009-12-21

申请人： Sumeet Sandhu

发明人： Sumeet Sandhu

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04L1/0071 ,  H04L1/0618 ,  H04L5/0023 ,  H04L25/0216 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/36

摘要： A multiple-input multiple output (MIMO) transmitter and methods for transmitting orthogonal frequency division multiplexed (OFDM) symbols with cyclic-delay diversity (CDD) are generally described herein. In some embodiments, a base station uses a number of antennas for MIMO transmission of OFDM symbols. For the number of antennas, quadrature-amplitude modulated (QAM) symbols are distributed across a group of OFDM tones of a block comprising the group of tones and a group of OFDM symbols. An incremented cyclic delay is applied to the QAM symbols of the block associated with each subsequent of the antennas for CDD transmission. Each blocks is transmitted by an associated one of the antennas.

摘要翻译： 多输入多输出（MIMO）发射机和用于发送具有循环延迟分集（CDD）的正交频分复用（OFDM）符号的方法）。 在一些实施例中，基站使用多个天线进行OFDM符号的MIMO传输。 对于天线数量，正交幅度调制（QAM）符号分布在包括音调组和一组OFDM符号的块的一组OFDM音调上。 对与用于CDD传输的每个后续天线相关联的块的QAM符号应用递增的循环延迟。 每个块由相关联的一个天线发送。

公开(公告)号：US08077802B2

公开(公告)日：2011-12-13

申请号：US12049766

申请日：2008-03-17

申请人： Sumeet Sandhu ,  Feng Xue

发明人： Sumeet Sandhu ,  Feng Xue

IPC分类号： H04L27/04 ,  H04L23/00 ,  H04B1/00 ,  H04W72/04 ,  H04J3/16

CPC分类号： H04L5/0037 ,  H04L5/0023 ,  H04L5/006 ,  H04W72/0453 ,  H04W72/082 ,  Y02D70/1224 ,  Y02D70/124 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/166

摘要： Device, system, and method of resource allocation in a wireless network. Embodiments include optimal space-frequency architectures for very high peak rates in wireless systems. For example, an apparatus for wireless communication in a power-limited, very wideband system includes a wireless communication device having a media access controller (MAC) and a physical layer (PHY) that are adapted for a multiple-input-multiple-output (MIMO) orthogonal frequency-division multiple access (OFDMA) communication scheme; a plurality of antennas, operationally coupled to said device, to send and receive wireless communication signals according to the MIMO-OFDMA communication scheme; and a resource allocator, to allocate transmission resources of the device into desired MIMO channels optimized according to at least one of signal-to-noise ratio (SNR), bandwidth, number of users, and signal-to-noise-plus-interference ratio (SINR).

摘要翻译： 无线网络资源分配的设备，系统和方法。 实施例包括用于无线系统中极高峰值速率的最佳空频架构。 例如，在功率受限的非常宽带系统中的用于无线通信的装置包括具有媒体接入控制器（MAC）和物理层（PHY）的无线通信设备，该物理层适用于多输入多输出（ MIMO）正交频分多址（OFDMA）通信方案; 多个天线，可操作地耦合到所述设备，以根据MIMO-OFDMA通信方案发送和接收无线通信信号; 以及资源分配器，用于将所述设备的传输资源分配到根据信噪比（SNR），带宽，用户数量以及信噪比加干扰比中的至少一个优化的期望MIMO信道中 （SINR）。

公开(公告)号：US08060033B2

公开(公告)日：2011-11-15

申请号：US12454726

申请日：2009-05-20

申请人： Nageen Himayat ,  Sumeet Sandhu

发明人： Nageen Himayat ,  Sumeet Sandhu

IPC分类号： H04B7/02 ,  H04K1/00 ,  H04L1/02

CPC分类号： H04B7/0669 ,  H04B7/068 ,  H04L1/0041 ,  H04L1/0071 ,  H04L1/0606 ,  H04L27/2601

摘要： A system, apparatus, method and article to manage diversity for a wireless multicarrier communication system are described. An apparatus may include a diversity agent to couple to a transmitter, the diversity agent to convert a determined number of input bits into symbols, interleave the symbols across multiple spatial streams, and map the symbols to tones for each spatial stream. Other embodiments are described and claimed.

摘要翻译： 描述了一种用于管理无线多载波通信系统的分集的系统，装置，方法和文章。 设备可以包括分组代理以耦合到发射机，分集代理将确定数量的输入比特转换为符号，在多个空间流之间交织符号，并将符号映射到每个空间流的音调。 描述和要求保护其他实施例。

公开(公告)号：US07782970B2

公开(公告)日：2010-08-24

申请号：US10789387

申请日：2004-02-26

申请人： Lei Shao ,  Sumit Roy ,  Sumeet Sandhu

发明人： Lei Shao ,  Sumit Roy ,  Sumeet Sandhu

IPC分类号： H04B7/02

CPC分类号： H04L1/0631 ,  H04L1/0606 ,  H04L1/0637

摘要： An apparatus and associated methods to improve diversity gain while preserving channel throughput in a multicarrier communication channel are generally presented.

摘要翻译： 通常呈现了一种在多载波通信信道中保持信道吞吐量的同时提高分集增益的装置和相关方法。

公开(公告)号：US07760678B2

公开(公告)日：2010-07-20

申请号：US11563386

申请日：2006-11-27

申请人： Sumeet Sandhu ,  Ozgur Oyman ,  Timothy F. Cox

发明人： Sumeet Sandhu ,  Ozgur Oyman ,  Timothy F. Cox

IPC分类号： H04B7/14 ,  H04B3/36 ,  H04J1/10 ,  H04J3/08 ,  H04J3/14

CPC分类号： H04L25/14 ,  H04B7/15521 ,  H04B7/15592 ,  H04L1/0013 ,  H04L2001/0097

摘要： Embodiments herein may operate at a cooperating relay station (CRS) in a wireless packet-carrying network (WPCN). A source-to-CRS (SC) link quality of an SC wireless channel may be estimated using signal quality information derived from a packet transmitted by a source station and received by the CRS. A CRS-to-destination (CD) link quality of a CD wireless channel may also be estimated using signal quality information derived from a packet transmitted by a destination station and received by the CRS. A source-to-destination (SD) link quality parameter representing SD link quality may be extracted by the CRS from the packet transmitted by the destination station. The CRS may decide whether to participate with the source station or with another CRS in transmitting an SD packet based upon the SC link quality, the CD link quality, the SD link quality, or a combination thereof. Other embodiments may be described and claimed.

摘要翻译： 本文的实施例可以在无线分组承载网络（WPCN）中的协作中继站（CRS）处操作。 可以使用从源站发送并由CRS接收的分组导出的信号质量信息来估计SC无线信道的源到CRS（SC）链路质量。 也可以使用从由目的地站发送并由CRS接收的分组导出的信号质量信息来估计CD无线信道的CRS到目的地（CD）链路质量。 表示SD链路质量的源到目的地（SD）链路质量参数可以由目的站发送的分组由CRS提取。 CRS可以基于SC链路质量，CD链路质量，SD链路质量或其组合来决定是否与源站或另一个CRS一起发送SD分组。 可以描述和要求保护其他实施例。

公开(公告)号：US20090245159A1

公开(公告)日：2009-10-01

申请号：US12059682

申请日：2008-03-31

申请人： Ozgur Oyman ,  Sumeet Sandhu

发明人： Ozgur Oyman ,  Sumeet Sandhu

IPC分类号： H04B7/14

CPC分类号： H04B7/2606 ,  H04L45/122 ,  H04W4/08 ,  H04W28/22 ,  H04W40/08 ,  H04W40/32 ,  H04W84/18 ,  H04W88/04 ,  Y02D70/1242 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/324 ,  Y02D70/449

摘要： An ad-hoc network system for computing a proposed number of node-clusters that enable a relative threshold data rate. The ad-hoc network system includes a source terminal, a destination terminal, a plurality of relay terminals, and a cluster determination engine. The source terminal sends a network communication to a destination terminal via a plurality of relay terminals. The cluster determination engine computes a threshold data rate, C, for a number of hops, N, based on a transmission power constraint. The cluster determination engine determines a proposed route for the wireless communication from the source terminal to the destination terminal according to the threshold data rate, C.

摘要翻译： 一种用于计算提出数量的能够实现相对阈值数据速率的节点簇的自组织网络系统。 自组织网络系统包括源终端，目的终端，多个中继终端和群集确定引擎。 源终端经由多个中继终端向目的地终端发送网络通信。 集群确定引擎基于传输功率约束计算针对跳数N的阈值数据速率C。 集群确定引擎根据阈值数据速率来确定用于从源终端到目的终端的无线通信的建议路由。

公开(公告)号：US20090147879A1

公开(公告)日：2009-06-11

申请号：US12324580

申请日：2008-11-26

申请人： Sumeet Sandhu

发明人： Sumeet Sandhu

IPC分类号： H04B7/02

CPC分类号： H04W88/06 ,  H04L1/0001 ,  H04L1/06 ,  H04L1/1854 ,  H04L1/188 ,  H04L5/00 ,  H04L27/261 ,  H04W16/28 ,  H04W74/02

摘要： Briefly, in accordance with one embodiment of the invention, a wireless communication system may adaptively switch between a multiple input, multiple output mode and a spatial division, multiple access mode based at least in part on channel conditions and traffic conditions.

摘要翻译： 简而言之，根据本发明的一个实施例，无线通信系统可以至少部分地基于信道条件和业务条件，在多输入多输出模式和空分多址接入模式之间自适应地进行切换。

公开(公告)号：US07529307B2

公开(公告)日：2009-05-05

申请号：US11093743

申请日：2005-03-30

申请人： Sumeet Sandhu ,  David Cheung

发明人： Sumeet Sandhu ,  David Cheung

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H03M13/27

摘要： An interleaver and scheme for interleaving in which highly correlated bits are maximally separated. The scheme involves interleaving a set of bits to be delivered to a modulation system that utilizes a quantity of N carrier frequencies. A first block of N consecutive bits is assigned to each of N bins, on a one-bit-per-one-bin basis. The aforementioned assignment proceeds in a particular sequence. A second block of N consecutive bits is assigned to each of the N bins, on a one-bit-per-one-bin basis. The second block is assigned in the same sequence the first block was assigned. The second block is consecutive to the first block.

摘要翻译： 用于交织的交织器和方案，其中高度相关的比特被最大程度地分离。 该方案涉及交织一组要传送到利用N个载波频率的调制系统的比特。 N个连续位的第一块被分配给每个N个存储体，每个一位一个。 上述分配以特定顺序进行。 N个连续位的第二块被分配给每个N个存储单元，每个一位一个bin。 第二个块以与分配第一个块相同的顺序分配。 第二个块与第一个块连续。