公开(公告)号：US20090170547A1

公开(公告)日：2009-07-02

申请号：US11965070

申请日：2007-12-27

申请人： Balaji Raghothaman ,  Peirre A. Humblet

发明人： Balaji Raghothaman ,  Peirre A. Humblet

IPC分类号： H04B7/00 ,  H04B1/00

CPC分类号： H04L1/0002 ,  H04L1/0025 ,  H04L2001/0092

摘要： An access terminal is enabled to communicate with a private access point while interference caused by the access terminal is mitigated. A maximum allowable transmit rate of the access terminal for communication with the private access point is determined. The access terminal is caused to communicate at a transmit rate at or below the maximum allowable transmit rate.

摘要翻译： 接入终端能够与专用接入点进行通信，同时减轻由接入终端造成的干扰。 确定与专用接入点通信的接入终端的最大允许发送速率。 使接入终端以等于或低于最大允许传输速率的传输速率进行通信。

公开(公告)号：US20070153923A1

公开(公告)日：2007-07-05

申请号：US11442686

申请日：2006-05-26

申请人： Zhouyue Pi ,  Balaji Raghothaman

发明人： Zhouyue Pi ,  Balaji Raghothaman

IPC分类号： H04K1/10

CPC分类号： H04L1/1887 ,  H04L1/0017 ,  H04L1/1607 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1822 ,  H04L27/2601 ,  H04L2001/0098

摘要： An approach is provided for error correction in a multi-carrier wireless network or an Orthogonal Frequency Division Multiplexing (OFDM) network. A first rate is assigned to a first error correction channel. A second rate is assigned to a second error correction channel, wherein the first rate is different from the second rate.

摘要翻译： 提供了一种用于多载波无线网络或正交频分复用（OFDM）网络中的纠错的方法。 第一速率被分配给第一纠错信道。 第二速率被分配给第二纠错信道，其中第一速率与第二速率不同。

公开(公告)号：US20070087749A1

公开(公告)日：2007-04-19

申请号：US11463920

申请日：2006-08-11

申请人： Dumitru Ionescu ,  Balaji Raghothaman

发明人： Dumitru Ionescu ,  Balaji Raghothaman

IPC分类号： H04J11/00

CPC分类号： H04L5/0048 ,  H04B7/04 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/03828 ,  H04L27/2604 ,  H04L27/2655 ,  H04L27/2657 ,  H04L27/2662

摘要： A method, system, apparatus and computer program product are provided for placing pilot symbols in an OFDM system using sets of multidimensional points having a structure that is derived from discernible expansions of generalized orthogonal designs. These sets of multidimensional points may be used to form pilot symbols on a two-dimensional frequency-time pilot symbol grid for sampling the flat fading process on various subcarriers of an OFDM MIMO system, transmit antennas, and OFDM symbols. The pilot information associated with the pilot symbols may be used to perform initial carrier synchronization and OFDM symbol timing while discerning between candidate base stations.

摘要翻译： 提供了一种方法，系统，装置和计算机程序产品，用于在OFDM系统中使用具有从广义正交设计的可辨识的扩展导出的结构的多维点集合来放置导频符号。 这些多维点集合可以用于在二维频率 - 时间导频符号网格上形成用于对OFDM MIMO系统，发射天线和OFDM符号的各个子载波上的平坦衰落过程进行采样的导频符号。 与导频符号相关联的导频信息可以用于在候选基站之间进行识别时执行初始载波同步和OFDM符号定时。

公开(公告)号：US20060146953A1

公开(公告)日：2006-07-06

申请号：US11075233

申请日：2005-03-08

申请人： Balaji Raghothaman ,  Jianzhong Zhang ,  Yan Wang ,  Marko Lampinen

发明人： Balaji Raghothaman ,  Jianzhong Zhang ,  Yan Wang ,  Marko Lampinen

IPC分类号： H04B7/02

CPC分类号： H04B7/0413 ,  H04B7/0854

摘要： An approach for determining antenna weights in a multiple antenna communication system is provided. The approach jointly optimizes the transmitter weights and the receiver filter. A filter of a receiver (e.g., Linear Minimum Mean Square Error (LMMSE)) is optimized using initial weight values of the transmit antennas. The cost function, which is a mean-squared of a difference between a transmitted signal and an estimated signal, is then modified according to the optimized receiver filter. A transmit filter is then optimized according to the modified cost function. The above approach advantageously can obtain antenna weights when the condition of separability of paths does not exist.

摘要翻译： 提供了一种用于确定多天线通信系统中的天线权重的方法。 该方法联合优化发射机权重和接收机滤波器。 使用发射天线的初始权重值来优化接收机的滤波器（例如，线性最小均方误差（LMMSE））。 然后根据优化的接收机滤波器修改作为发送信号和估计信号之间的差的均方的成本函数。 然后根据修改的成本函数优化发送过滤器。 当不存在路径的可分离性条件时，上述方法有利地可以获得天线权重。

公开(公告)号：US20150063095A1

公开(公告)日：2015-03-05

申请号：US14125302

申请日：2012-06-08

申请人： Tao Deng ,  Ravikumar V. Pragada ,  Gregory S. Sternberg ,  Balaji Raghothaman ,  Zhuorong Deng ,  Kiran K. Vanganuru

发明人： Tao Deng ,  Ravikumar V. Pragada ,  Gregory S. Sternberg ,  Balaji Raghothaman ,  Zhuorong Deng ,  Kiran K. Vanganuru

IPC分类号： H04W8/00 ,  H04W24/04 ,  H04W48/14 ,  H04W76/02 ,  H04W24/08 ,  H04W48/08

CPC分类号： H04W8/005 ,  H04W24/04 ,  H04W24/08 ,  H04W24/10 ,  H04W48/08 ,  H04W48/14 ,  H04W76/18 ,  H04W88/06

摘要： A method and apparatus for neighbor discovery in a wireless communication system are disclosed. A neighbor seeking wireless transmit/receive unit (WTRU) may send a first beacon based on configuration information provided by the network. The neighbor WTRUs receive the first beacon and may send either a report to the network or send a second beacon to the neighbor seeking WTRU. The network may then provide neighbor WTRU information to the neighbor seeking WTRU. The neighbor discovery may be performed within a pre-defined group of WTRUs that is formed based on proximity to the WTRU and/or an attribute of the WTRU. The neighbor discovery procedure may be performed to find neighbor WTRUs in case where a WTRU fails to find any network. A neighbor list may be generated by the neighbor seeking WTRU by measuring reference signals transmitted by neighbor WTRUs on an uplink to the network.

摘要翻译： 公开了一种用于无线通信系统中的邻居发现的方法和装置。 寻找无线发射/接收单元（WTRU）的邻居可以基于由网络提供的配置信息发送第一信标。 相邻WTRU接收第一信标，并且可以向网络发送报告或者向邻居寻找WTRU发送第二信标。 网络然后可以向邻居寻找WTRU提供相邻WTRU信息。 可以在基于与WTRU的接近度和/或WTRU的属性形成的WTRU的预定义组内执行邻居发现。 在WTRU无法找到任何网络的情况下，可以执行邻居发现过程以找到相邻WTRU。 可以通过在上行链路上测量由相邻WTRU发送的参考信号，由邻居寻找WTRU生成邻居列表。

公开(公告)号：US08280376B2

公开(公告)日：2012-10-02

申请号：US12347511

申请日：2008-12-31

申请人： Sundaram M. Rajagopalan ,  Deepak Das ,  Balaji Raghothaman ,  Woojune Kim ,  Steve Kohalmi

发明人： Sundaram M. Rajagopalan ,  Deepak Das ,  Balaji Raghothaman ,  Woojune Kim ,  Steve Kohalmi

IPC分类号： H04W36/00

CPC分类号： H04W92/20 ,  H04W8/005 ,  H04W8/26

摘要： In general, a first private access point detects a neighboring private access point. An address of the neighboring private access point is identified, and a peer-to-peer network that includes the first private access point and the neighboring private access points is formed. The peer-to-peer network is maintained between the first private access point and the neighboring private access points.

摘要翻译： 通常，第一私人接入点检测相邻的专用接入点。 识别相邻私有接入点的地址，并且形成包括第一专用接入点和相邻专用接入点的对等网络。 对等网络保持在第一专用接入点和相邻私有接入点之间。

公开(公告)号：US20100167742A1

公开(公告)日：2010-07-01

申请号：US12347511

申请日：2008-12-31

申请人： Sundaram M. Rajagopalan ,  Deepak Das ,  Balaji Raghothaman ,  Woojune Kim ,  Steven Kohalmi

发明人： Sundaram M. Rajagopalan ,  Deepak Das ,  Balaji Raghothaman ,  Woojune Kim ,  Steven Kohalmi

IPC分类号： H04W36/00

CPC分类号： H04W92/20 ,  H04W8/005 ,  H04W8/26

摘要： In general, a first private access point detects a neighboring private access point. An address of the neighboring private access point is identified, and a peer-to-peer network that includes the first private access point and the neighboring private access points is formed. The peer-to-peer network is maintained between the first private access point and the neighboring private access points.

摘要翻译： 通常，第一私人接入点检测相邻的专用接入点。 识别相邻私有接入点的地址，并且形成包括第一专用接入点和相邻专用接入点的对等网络。 对等网络保持在第一专用接入点和相邻私有接入点之间。

公开(公告)号：US07606319B2

公开(公告)日：2009-10-20

申请号：US10892833

申请日：2004-07-15

申请人： Jianzhong Zhang ,  Balaji Raghothaman ,  Yan Wang ,  Giridhar Mandyam

发明人： Jianzhong Zhang ,  Balaji Raghothaman ,  Yan Wang ,  Giridhar Mandyam

IPC分类号： H04B7/02

CPC分类号： H04L1/0656 ,  H04B1/7105 ,  H04B1/71055 ,  H04L1/0026 ,  H04L1/20 ,  H04L2025/03426 ,  H04L2025/03617

摘要： In a JE, spread spectrum communication MIMO system where a demultiplexed packet is transmitted over multiple streams, two versions of a single CQI are disclosed: generalized SNR or constrained mutual information CMI between the transmitted and received chip vectors. In the receiver, the CMI is constrained so that filtering is suboptimal. The filter bank is preferably LMMSE or MVDR filters that convert the multi-path channel into a single path channel so that joint sequence detection is unnecessary. Detection is by a per-Walsh code architecture, wherein a plurality of Walsh-code specific detectors in parallel detect bits or symbols from the single-channel chips after downconverting chip to symbols. Link to system mapping is realizable using the disclosed CQI for a JE MIMO system in that the CQI or related information is returned to the transmitter, which adapts coding rate and/or modulation for the channel as represented by the CQI.

摘要翻译： 在扩频通信MIMO系统中，通过多个流传输解复用分组的扩频通信MIMO系统，公开了单个CQI的两个版本：发送和接收的码片向量之间的广义SNR或受限互相信息CMI。 在接收机中，CMI被约束，使得过滤不是最佳的。 滤波器组优选地将多路径信道转换成单路径信道的LMMSE或MVDR滤波器，使得不需要联合序列检测。 检测是通过沃尔什码结构进行的，其中多个沃尔什码专用检测器在将芯片下变频到符号之后并行地检测来自单通道芯片的位或符号。 使用所公开的用于JE MIMO系统的CQI可实现与系统映射的链接，因为CQI或相关信息被返回给发射机，其适配由CQI表示的信道的编码率和/或调制。

公开(公告)号：US07379506B2

公开(公告)日：2008-05-27

申请号：US10669128

申请日：2003-09-23

申请人： Adrian Boariu ,  Balaji Raghothaman

发明人： Adrian Boariu ,  Balaji Raghothaman

IPC分类号： H04B7/02

CPC分类号： H04W16/28 ,  H04B7/061 ,  H04W24/00 ,  H04W88/06

摘要： Apparatus, and an associated method, for facilitating communication of encoded data, formed of a systematic part and a non-systematic part, in a radio communication system. Systematic parts of the encoded data are assigned by an assignor to transmit antennas that are associated with communication channels exhibiting better, or best, communication quality levels. Determinations are made of communication conditions to rank the transmit antennas, thereby permit appropriate assignments of the encoded data to transmit antennas. Feedback is provided by the receiver that receives the transmitted data. The feedback information includes, or is formed responsive to, detections and other measurements at the receivers.

摘要翻译： 一种用于在无线电通信系统中促进由系统部分和非系统部分形成的编码数据的通信的装置和相关方法。 编码数据的系统部分由分配者分配以发送与展现更好或最佳通信质量水平的通信信道相关联的天线。 确定对发射天线进行排序的通信条件，从而允许将编码数据适当地分配给发射天线。 反馈由接收发送数据的接收器提供。 反馈信息包括或响应于接收器处的检测和其他测量形成。

公开(公告)号：US20070280336A1

公开(公告)日：2007-12-06

申请号：US10590671

申请日：2005-02-23

申请人： Jianzhong Zhang ,  Balaji Raghothaman ,  Giridhar Mandyam

发明人： Jianzhong Zhang ,  Balaji Raghothaman ,  Giridhar Mandyam

IPC分类号： H04Q7/00

CPC分类号： H04L25/03292 ,  H04L1/0631 ,  H04L1/0656

摘要： A system according to embodiments of this invention provide a multiple transmit antenna (117-1 . . . M), multiple receive antenna (121-1 . . . N) (MIMO) receiver (125) design for the communication downlinks such as those used in CDMA technology. Two algorithms referred to as the MIMO LMMSE-FFT and MIMO LMMSE-SIC (Successive Interference Cancellation) algorithms, are described in detail. In embodiments of the invention, the interference cancellation step is achieved without the impractical assumption of the knowledge of all the active Walsh codes in the systems, unlike many other interference cancellation based algorithms found in the literature.

摘要翻译： 根据本发明的实施例的系统提供用于诸如那些通信下行链路的多个发射天线（117-1M），多个接收天线（121-1.1）（MIMO）接收机（125）设计 用于CDMA技术。 被称为MIMO LMMSE-FFT和MIMO LMMSE-SIC（连续干扰消除）算法的两种算法被详细描述。 在本发明的实施例中，与在文献中发现的许多其他基于干扰消除的算法不同，实现干扰消除步骤，而不需要系统中所有活动沃尔什码的知识的不切实际的假设。