公开(公告)号：US09179319B2

公开(公告)日：2015-11-03

申请号：US11260895

申请日：2005-10-27

申请人： Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Hemanth Sampath ,  Tingfang Ji ,  Tamer Kadous

发明人： Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Hemanth Sampath ,  Tingfang Ji ,  Tamer Kadous

IPC分类号： H04M1/00 ,  H04W16/00 ,  H04W16/24 ,  H04W16/28

CPC分类号： H04W16/00 ,  H04B7/0408 ,  H04B7/0695 ,  H04W16/24 ,  H04W16/28 ,  H04W72/046 ,  H04W72/085

摘要： Apparatuses and methodologies are described that enhance performance in a wireless communication system using beamforming transmissions. According to one aspect, a set of transmit beams are defined that simultaneously provides for space division multiplexing, multiple-input multiple output (MIMO transmission and opportunistic beamforming. The addition of a wide beam guarantees a minimum acceptable performance for all user devices.

摘要翻译： 描述了使用波束成形传输来增强在无线通信系统中的性能的装置和方法。 根据一个方面，定义了一组发射波束，其同时提供空分多路复用，多输入多输出（MIMO传输和机会波束成形）。增加宽波束保证所有用户设备的最小可接受性能。

公开(公告)号：US09148256B2

公开(公告)日：2015-09-29

申请号：US11021791

申请日：2004-12-22

申请人： Hemanth Sampath ,  Tamer Kadous

发明人： Hemanth Sampath ,  Tamer Kadous

IPC分类号： H04L1/06 ,  H04B7/04 ,  H04L27/26

CPC分类号： H04L1/0618 ,  H04B7/0486 ,  H04L27/2608

摘要： The performance of a Single Code Word (SCW) design with low complexity MMSE receiver & rank prediction is similar to the Multiple Code Word (MCW) design with successive interference cancellation (SIC). A method of rank prediction comprises calculating MIMO channel matrices corresponding to layer transmissions for each tone, calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices, mapping the SNR for each tone to generate effective SNRs for each layer transmission, selecting a highest packet format (PF) with an SNR threshold less than the effective SNR for each layer transmission, maximizing an over-all spectral efficiency based on the selected highest packet formats for each layer transmission, and selecting a rank based on maximizing an over-all spectral efficiency.

摘要翻译： 具有低复杂度MMSE接收机和等级预测的单码字（SCW）设计的性能类似于具有连续干扰消除（SIC）的多码字（MCW）设计。 一种等级预测的方法包括：计算与每个音调的层传输相对应的MIMO信道矩阵，基于MIMO信道矩阵计算每个音调的信噪比（SNR），映射每个音调的SNR以产生每个音调的有效SNR 选择具有小于每层传输的有效SNR的SNR阈值的最高分组格式（PF），基于用于每层传输的所选择的最高分组格式来最大化全部频谱效率，以及基于 最大化全频谱效率。

公开(公告)号：US08885744B2

公开(公告)日：2014-11-11

申请号：US11937472

申请日：2007-11-08

申请人： Tamer Kadous ,  Naga Bhushan ,  Alexei Gorokhov

发明人： Tamer Kadous ,  Naga Bhushan ,  Alexei Gorokhov

IPC分类号： H04L1/02 ,  H04B7/06 ,  H04L1/00 ,  H04B7/04 ,  H04L5/00 ,  H04L25/02 ,  H04L25/03

CPC分类号： H04L1/0026 ,  H04B7/0417 ,  H04B7/0632 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0071 ,  H04L5/0091 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/03343 ,  H04L2025/03426

摘要： Systems and methodologies are described that facilitate cycling across antennas for channel quality information (CQI) computation and data transmission in a multiple-input multiple-output (MIMO) wireless communication environment. Pilots can be obtained by a wireless terminal. Further, virtual antennas that can be supported by a channel can be identified based upon an analysis of the pilots. Moreover, CQI computations can be effectuated for each of the supported virtual antennas; thereafter, the CQI data can be sent to a base station for data transmission scheduling. Additionally, the base station can schedule transmission based upon the CQI data and/or fairness considerations. When scheduled, data transmission can occur by cycling across the supported virtual antennas.

摘要翻译： 描述了有助于在多输入多输出（MIMO）无线通信环境中跨越天线进行信道质量信息（CQI）计算和数据传输的系统和方法。 飞行员可以通过无线终端获得。 此外，可以基于对导频的分析来识别可以由信道支持的虚拟天线。 此外，可以为每个所支持的虚拟天线实现CQI计算; 此后，CQI数据可以被发送到用于数据传输调度的基站。 此外，基站可以基于CQI数据和/或公平性考虑来调度传输。 当调度时，可以通过在支持的虚拟天线之间循环来进行数据传输。

公开(公告)号：US08724555B2

公开(公告)日：2014-05-13

申请号：US11418930

申请日：2006-05-04

申请人： Ranganathan Krishnan ,  Rajiv Vijayan ,  Tamer Kadous

发明人： Ranganathan Krishnan ,  Rajiv Vijayan ,  Tamer Kadous

IPC分类号： H04W4/00 ,  H04J11/00 ,  H04W74/00 ,  H04W72/04

CPC分类号： H04W74/004 ,  H04L5/0023 ,  H04L5/0041 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/0248 ,  H04W52/325 ,  H04W72/0413

摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.

摘要翻译： 在OFDM系统中在上行链路上更有效地发送导频和信令的技术。 通过子带复用，系统中的M个可用子带被划分成Q个不相关的子带组。 每个子带组可被分配给用于上行链路导频传输的不同终端。 多个终端可以在其分配的子带上同时发送。 即使S代替M个子带用于每个终端的导频传输，导频的发射功率也可以按比例更高以获得相同的总导频能量。 接收来自终端的导频传输，并且基于在所分配的子带上接收到的导频，为每个终端导出信道估计。 信道估计包括对未分配组中的附加子带的响应。 子带复用也可以用于上行链路信令传输。

公开(公告)号：US08676209B2

公开(公告)日：2014-03-18

申请号：US11761790

申请日：2007-06-12

申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Tamer Kadous ,  Mohammad J. Borran ,  Rajat Prakash

发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Tamer Kadous ,  Mohammad J. Borran ,  Rajat Prakash

IPC分类号： H04W36/00 ,  H04W4/00

CPC分类号： H04W36/30 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2613 ,  H04W36/36

摘要： Techniques for selecting serving sectors and performing handoff for a terminal on the forward and reverse links are described. The terminal may obtain pilot measurements for pilots transmitted on the forward link and may update an active set based on the pilot measurements. The terminal may send a transmission (e.g., for pilot, signaling, etc.) on the reverse link and may receive channel quality information indicative of reverse link channel quality for the terminal at multiple sectors in the active set. The transmission may include pilot, and the channel quality information from each sector may include a pilot carrier-over-thermal ratio (pCoT) determined by that sector based on the pilot. The terminal may select a serving sector based on the channel quality information, interference information, and/or other information and may send a request for handoff (e.g., via a signaling message an/or an access probe) to the selected serving sector.

摘要翻译： 描述用于选择服务扇区并对前向和反向链路上的终端执行切换的技术。 终端可以获得在前向链路上发送的导频的导频测量，并且可以基于导频测量来更新活动集。 终端可以在反向链路上发送传输（例如，用于导频，信令等），并且可以在活动集中的多个扇区处接收指示终端的反向链路信道质量的信道质量信息。 传输可以包括导频，并且来自每个扇区的信道质量信息可以包括由该扇区基于导频确定的导频载波热传输比（pCoT）。 终端可以基于信道质量信息，干扰信息和/或其他信息来选择服务扇区，并且可以向所选择的服务扇区发送切换请求（例如，经由信令消息，或访问探测器）。

公开(公告)号：US08498192B2

公开(公告)日：2013-07-30

申请号：US11677000

申请日：2007-02-20

申请人： Naga Bhushan ,  Tamer Kadous ,  Mingxi Fan ,  Yongbin Wei

发明人： Naga Bhushan ,  Tamer Kadous ,  Mingxi Fan ,  Yongbin Wei

IPC分类号： H04J11/00

CPC分类号： H04L5/1438 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0639 ,  H04J13/0044 ,  H04L1/0002 ,  H04L1/0025 ,  H04L1/0028 ,  H04L1/06 ,  H04L1/1671 ,  H04L1/1812 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/023 ,  H04L25/0204 ,  H04L25/0206 ,  H04L25/0226 ,  H04L27/2613 ,  H04W28/06 ,  H04W28/18 ,  H04W48/08 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/144 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/444

摘要： Spatial pilot to support MIMO receivers in a multi-antenna and multi-layer transmission communication system. A first layer pilot for a single layer transmission is repeated across subbands in a first OFDM symbol and the first layer pilot is also repeated offset from the first OFDM symbol in an adjacent second OFDM symbol. Additional transmission layers may also be transmitted each include a separate pilot generated and repeated in the first symbol and repeated offset form the separate pilot in an adjacent second symbol. The first and second OFDM symbols are then transmitted and received to characterize the receive channels.

摘要翻译： 在多天线和多层传输通信系统中支持MIMO接收机的空间导频。 在第一OFDM符号中的子带上重复用于单层传输的第一层导频，并且第一层导频也在邻近的第二OFDM符号中与第一OFDM符号重复偏移。 还可以传输附加的传输层，每个传输层包括在第一符号中生成和重复的单独的导频，并且在相邻的第二符号中从单独的导频重复偏移。 然后发送和接收第一和第二OFDM符号以表征接收信道。

公开(公告)号：US08462859B2

公开(公告)日：2013-06-11

申请号：US11445377

申请日：2006-05-31

申请人： Hemanth Sampath ,  Tamer Kadous

发明人： Hemanth Sampath ,  Tamer Kadous

IPC分类号： H04L27/28

CPC分类号： H04L25/03242 ,  H03M13/45 ,  H04B7/04 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0048 ,  H04L1/0066 ,  H04L1/06 ,  H04L1/0631 ,  H04L1/0656 ,  H04L25/03197 ,  H04L27/2601 ,  H04L27/38 ,  H04L2025/03414

摘要： Methods and apparatuses for decoding codewords received over a MIMO channel are provided. According to one aspect of the disclosure, a cost function is computed for each constellation point of an Mth rank or spatial layer, and Ncand of those constellation points having minimum cost are preserved as candidate points, where Ncand is a parameter specified to the decoding algorithm. In addition, a cost function may be computed for all possible transitions from the Ncand candidate points of the Mth rank to all possible constellation points of the (M−1)th spatial layer, and Ncand of those transitions having minimum cost are preserved as candidate points. The process is repeated for all spatial layers, resulting in the identification of Ncand candidate codewords and their associated cost functions.

摘要翻译： 提供了用于解码通过MIMO信道接收的码字的方法和装置。 根据本公开的一个方面，针对第M等级或空间层的每个星座点计算成本函数，并且将具有最小成本的那些星座点的Nc被保留为候选点，其中Ncand是为解码算法指定的参数 。 另外，可以针对从第M级的Ncand候选点到第（M-1）个空间层的所有可能的星座点的所有可能的转换来计算成本函数，并且将具有最小成本的那些转换的Nc保持为候选 积分 对所有空间层重复该过程，导致识别Ncand候选码字及其相关的成本函数。

公开(公告)号：US08457152B2

公开(公告)日：2013-06-04

申请号：US11155204

申请日：2005-06-16

申请人： Alexei Gorokhov ,  Avneesh Agrawal ,  Dhananjay Gore ,  Tamer Kadous

发明人： Alexei Gorokhov ,  Avneesh Agrawal ,  Dhananjay Gore ,  Tamer Kadous

IPC分类号： H04J3/16 ,  H04J9/00

CPC分类号： H04L1/005 ,  H04L1/0003 ,  H04L1/0041 ,  H04L1/06

摘要： A MIMO communication system is adapted to encode multiple data streams at the same adaptable rate. Accordingly, the set of all possible modulation/rate combinations to all modulations with common rates is decreased thus resulting in the reduction of the number of possible packet formats carrying the data streams. Rate prediction is made more error-resilient, in part, due to the averaging over all information rates. Furthermore, the signaling overhead of the packets is reduced. Therefore, the tradeoff between the desired transmission rate granularity on the one hand, and robustness/signaling overhead on the other hand, is controlled by adjusting the coding rate.

摘要翻译： MIMO通信系统适于以相同的可适应速率对多个数据流进行编码。 因此，对具有公共速率的所有调制的所有可能的调制/速率组合的集合被减少，从而导致承载数据流的可能分组格式的数量的减少。 速率预测更具有弹性，部分原因是由于所有信息速率的平均值。 此外，分组的信令开销减小。 因此，通过调整编码率来控制一方面期望的传输速率粒度与鲁棒性/信令开销之间的权衡。

公开(公告)号：US08391196B2

公开(公告)日：2013-03-05

申请号：US11923761

申请日：2007-10-25

申请人： Alexei Gorokhov ,  Mohammad J. Borran ,  Avneesh Agrawal ,  Naga Bhushan ,  Tamer Kadous ,  Ayman Fawzy Naguib

发明人： Alexei Gorokhov ,  Mohammad J. Borran ,  Avneesh Agrawal ,  Naga Bhushan ,  Tamer Kadous ,  Ayman Fawzy Naguib

IPC分类号： G08C17/00

CPC分类号： H04W52/30 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0058 ,  H04W52/04 ,  H04W72/06 ,  Y02B30/50

摘要： Systems and methodologies are described that facilitate mitigating effect of non-linear distortion from a power amplifier on a spectral mask margin. Power limit indications can be analyzed in scheduling mobile devices. Mobile devices with power limits can be scheduled on inner subbands. The power limits can be based at least in part on power amplifier headroom information. Other mobile devices can employ remaining portions of an allocated spectrum. Further, mobile devices can evaluate and establish a power amplifier backoff based upon the subband scheduling.

公开(公告)号：US08229423B2

公开(公告)日：2012-07-24

申请号：US11893834

申请日：2007-08-17

申请人： Sandip Sarkar ,  Aamod Khandekar ,  Tamer Kadous

发明人： Sandip Sarkar ,  Aamod Khandekar ,  Tamer Kadous

IPC分类号： H04W4/20 ,  H04H20/72

CPC分类号： H04W72/005

摘要： Methods and apparatus for assigning, identifying and controlling broadcast transmissions are disclosed. A broadcast flow is assigned to a broadcast logical channel of the physical resources of a wireless communication channel. A broadcast channel control message indicative of parameters of the broadcast logical channel is generated. Upon receipt, the broadcast channel control message is processed and used to accordingly process the received broadcast transmission.

摘要翻译： 公开了用于分配，识别和控制广播传输的方法和装置。 广播流被分配给无线通信信道的物理资源的广播逻辑信道。 生成表示广播逻辑信道的参数的广播信道控制消息。 在接收到广播频道控制消息时，处理并用于相应地处理所接收的广播传输。