公开(公告)号：US20140073369A1

公开(公告)日：2014-03-13

申请号：US13613758

申请日：2012-09-13

申请人： Gamini Senarath ,  Hang Zhang ,  Ho-Ting Cheng ,  Vahid Tarokh

发明人： Gamini Senarath ,  Hang Zhang ,  Ho-Ting Cheng ,  Vahid Tarokh

IPC分类号： H04W52/04 ,  H04W72/12

CPC分类号： H04W52/226 ,  H04W52/386 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/12

摘要： Methods and systems for providing joint power control (PC) and scheduling in a wireless network are provided. In one example, a method includes generating a near-optimal power pattern for PC and scheduling in accordance with long term channel statistics. The near-optimal PC solution may be generated by first generating a set of possible power patterns in accordance with likely scheduling scenarios, then statistically narrowing the set of possible power patterns to identify the most commonly used power patterns, and finally selecting one of the most commonly used power patterns as the near-optimal power pattern. In another example, a table of optimal PC solutions are provided for performing distributed PC and scheduling in an adaptive and/or dynamic manner.

摘要翻译： 提供了在无线网络中提供联合功率控制（PC）和调度的方法和系统。 在一个示例中，一种方法包括根据长期信道统计生成用于PC的近最优功率模式和调度。 可以通过首先根据可能的调度场景生成一组可能的功率模式，然后统计学地缩小可能的功率模式集合以识别最常用的功率模式，并且最后选择最多的功率模式 常用功率模式作为近最优功率模式。 在另一示例中，提供了用于以自适应和/或动态方式执行分布式PC和调度的最佳PC解决方案的表。

公开(公告)号：US20120147987A1

公开(公告)日：2012-06-14

申请号：US13315125

申请日：2011-12-08

申请人： Arthur Robert Calderbank ,  Ayman F. Naguib ,  Nambirajan Seshadri ,  Vahid Tarokh

发明人： Arthur Robert Calderbank ,  Ayman F. Naguib ,  Nambirajan Seshadri ,  Vahid Tarokh

IPC分类号： H04B7/02

CPC分类号： H04L1/0625 ,  A01K2217/075 ,  C07K14/78 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0891 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0618 ,  H04L27/20

摘要： A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MSLE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.

摘要翻译： 公开了一种用于增加数据速率并使用多个发射天线提供天线分集的方法和装置。 使用数字信号的一组位来产生码字。 代码字根据通道代码提供。 可以在天线输出通道中提供延迟元件，或者可以省略适当的代码结构延迟。 n个信号表示用n个不同的发射天线发送码字的n个符号。 在接收机MSLE或其他解码用于解码噪声接收序列。 并行传输和信道编码能够提高数据速率与以前的技术相同，即使在衰落条件下也能恢复数据速率。 信道编码可以在适当的条件下与纠错码连接。

公开(公告)号：US20110299460A1

公开(公告)日：2011-12-08

申请号：US13085335

申请日：2011-04-12

申请人： Vahid Tarokh ,  Yang-Seok Choi ,  Siavash Alamouti

发明人： Vahid Tarokh ,  Yang-Seok Choi ,  Siavash Alamouti

IPC分类号： H04W4/00

CPC分类号： H01Q3/26 ,  H01Q1/246 ,  H04B7/0617 ,  H04W52/42

摘要： Improved methods and apparatuses are provided to address a potential “hidden beam problem” in wireless communication systems employing smart antennas. The improved methods and apparatuses utilize complementary beamforming (CBF) techniques, such as, for example, Subspace Complementary Beamforming (SCBF), Complementary Superposition Beamforming (CSBF) and/or Single Beam Complementary Beamforming (SBCBF) techniques.

摘要翻译： 提供了改进的方法和装置来解决使用智能天线的无线通信系统中的潜在的“隐患问题”。 改进的方法和装置利用互补波束成形（CBF）技术，例如子空间互补波束成形（SCBF），互补叠加波束成形（CSBF）和/或单波束互补波束成形（SBCBF）技术。

公开(公告)号：US07986750B2

公开(公告)日：2011-07-26

申请号：US11776631

申请日：2007-07-12

申请人： In-Soo Hwang ,  Cheol-Woo You ,  Yung-Soo Kim ,  Dong-Ho Kim ,  Vahid Tarokh

发明人： In-Soo Hwang ,  Cheol-Woo You ,  Yung-Soo Kim ,  Dong-Ho Kim ,  Vahid Tarokh

IPC分类号： H03K9/00

CPC分类号： H01Q21/00 ,  H01Q1/52

摘要： An apparatus and method for removing interference in a transmitting end of a multi-antenna system is provided. The method includes decomposing a channel matrix including channel coefficients for a plurality of terminals, calculating a value proportional to an interference signal for each of antennas, and calculating a sum of a transmission signal and the calculated value for each terminal and multiplying the calculated sum by the decomposed channel matrix. Accordingly, channel capacity can be improved by optimizing a data transfer rate and transmission power for each terminal.

摘要翻译： 提供一种用于消除多天线系统的发送端的干扰的装置和方法。 该方法包括分解包括多个终端的信道系数的信道矩阵，计算与每个天线的干扰信号成比例的值，并且计算每个终端的传输信号和计算值的和，并将计算出的和乘以 分解的信道矩阵。 因此，通过优化每个终端的数据传输速率和传输功率可以提高信道容量。

公开(公告)号：US20090086832A1

公开(公告)日：2009-04-02

申请号：US11862331

申请日：2007-09-27

申请人： Vahid Tarokh ,  Shahrnaz Azizi ,  Yang-seok Choi

发明人： Vahid Tarokh ,  Shahrnaz Azizi ,  Yang-seok Choi

IPC分类号： H04L27/28

CPC分类号： H04L27/2613

摘要： Techniques are disclosed involving preamble sequences. For instance, an apparatus includes a module to provide a preamble sequence having multiple values, where each of the values corresponds to an orthogonal frequency division multiplexing (OFDM) subcarrier. These multiple values may include multiple blocks of values based on a differentially encoded and scrambled row of a Hadamard matrix. The apparatus may further include a modulation module to produce an OFDM modulated signal from the preamble sequence. Further, techniques for the detection of such preambles are disclosed.

摘要翻译： 公开了涉及前序序列的技术。 例如，一种装置包括提供具有多个值的前同步码序列的模块，其中每个值对应于正交频分复用（OFDM）副载波。 这些多个值可以包括基于Hadamard矩阵的差分编码和加扰行的多个值块。 该装置还可以包括调制模块，用于从前导序列产生OFDM调制信号。 此外，公开了用于检测这种前导码的技术。

公开(公告)号：US07453965B1

公开(公告)日：2008-11-18

申请号：US11653610

申请日：2007-01-16

申请人： Hamid Jafarkhani ,  Vahid Tarokh

发明人： Hamid Jafarkhani ,  Vahid Tarokh

IPC分类号： H04B7/10 ,  H04L1/02

CPC分类号： H04B7/0894 ,  H04L1/0631 ,  H04L1/0668

摘要： Input signals of each frame are encoded by mapping the signals onto a coordinate system dictated by the symbols of the previous frame, and symbols from a constellation are selected based on the results of such mapping. Received signals are detected by preprocessing the signals detected at each antenna with signals detected by the antenna at the immediately previous frame, and then applied to a maximum likelihood detector circuit, followed by an inverse mapping circuit.

摘要翻译： 通过将信号映射到由前一帧的符号指定的坐标系上来编码每个帧的输入信号，并且基于这种映射的结果来选择来自星座的符号。 通过使用在紧接的前一帧由天线检测的信号预处理在每个天线处检测到的信号，然后将其应用于最大似然检测器电路，然后是反映射电路，来检测接收信号。

公开(公告)号：US07397864B2

公开(公告)日：2008-07-08

申请号：US10251935

申请日：2002-09-20

申请人： Vahid Tarokh ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Jianglei Ma

发明人： Vahid Tarokh ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Jianglei Ma

IPC分类号： H04L27/00

CPC分类号： H04L1/1841 ,  H04L1/0625 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/1893

摘要： The present invention relates to space-time coding techniques capable of providing incremental redundancy in wireless communication environments incorporating spatial and temporal diversity. In general, a transmitter sends packets, via blocks of symbols, to a receiver with high bandwidth efficiency and only in the event that the receiver does not correctly receive a data packet does the transmitter send additional symbols to assist with the decoding of the incorrectly received packet. A hybrid ARQ feedback mechanism is used such that the receiver can inform the transmitter whether the packets were correctly or incorrectly received. From the feedback, the transmitter can determine whether to send new symbols or initiate incremental redundancy. By combining the received words corresponding to the redundant symbols and those of the original packet transmission, additional diversity, coding gain, signal energy, or a combination thereof are provided to the receiver and are used to correctly decode the transmitted data.

摘要翻译： 本发明涉及能够在包含空间和时间分集的无线通信环境中提供增量冗余的时空编码技术。 通常，发射机通过符号块将数据包发送到具有高带宽效率的接收机，并且仅在接收机不正确地接收数据分组的情况下，发射机发送附加符号以帮助解码错误接收 包。 使用混合ARQ反馈机制，使得接收机可以通知发射机是否正确或不正确地接收分组。 从反馈中，发射机可以确定是发送新符号还是启动增量冗余。 通过将对应于冗余符号的接收到的字与原始分组传输的字组合，将附加分集，编码增益，信号能量或其组合提供给接收机，并用于正确解码发送的数据。

公开(公告)号：US20080063107A1

公开(公告)日：2008-03-13

申请号：US11929090

申请日：2007-10-30

申请人： Siavash Alamouti ,  Vahid Tarokh

发明人： Siavash Alamouti ,  Vahid Tarokh

IPC分类号： H04L1/02

CPC分类号： H04B7/0857 ,  H04B1/02 ,  H04B7/0613 ,  H04B7/0615 ,  H04B7/0667 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0689 ,  H04B7/0837 ,  H04B7/0845 ,  H04B7/0854 ,  H04B7/0891 ,  H04B7/12 ,  H04L1/0054 ,  H04L1/04 ,  H04L1/0606 ,  H04L1/0618 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0643 ,  H04L1/0668 ,  H04L1/08 ,  H04L25/0202

摘要： A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only of simple arithmetic operations, such as negation and conjugation. The diversity created by the 5 transmitter utilizes space diversity and either time or frequency diversity. Space diversity is effected by redundantly transmitting over a plurality of antennas, time diversity is effected by redundantly transmitting at different times, and frequency diversity is effected by redundantly transmitting at different frequencies: Illustratively, using two transmit antennas and a single receive antenna, one of the disclosed embodiments provides the to same diversity gain as the maximal-ratio receiver combining (MRRC) scheme with one transmit antenna and two receive antennas. The principles of this invention are applicable to arrangements with more than two antennas, and an illustrative embodiment is disclosed using the same space block code with two transmit and two receive antennas.

摘要翻译： 结合仅包括诸如否定和共轭的简单算术运算的编码，由多个发送信道发送的符号创建简单的块编码装置。 5发射机产生的分集利用空间分集和时间或频率分集。 通过在多个天线上进行冗余发送来实现空间分集，通过在不同时间进行冗余发送实现时间分集，并且通过以不同频率进行冗余传输来实现频率分集：说明性地，使用两个发射天线和单个接收天线 所公开的实施例提供与具有一个发射天线和两个接收天线的最大比率接收机组合（MRRC）方案相同的分集增益。 本发明的原理可应用于具有两个以上天线的布置，并且使用具有两个发射天线和两个接收天线的相同空间块码公开了一个说明性实施例。

公开(公告)号：US07274751B2

公开(公告)日：2007-09-25

申请号：US10674735

申请日：2003-09-30

申请人： Vahid Tarokh ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Yung-Soo Kim

发明人： Vahid Tarokh ,  Jae-Hak Chung ,  Chan-Soo Hwang ,  Yung-Soo Kim

IPC分类号： H04L27/04 ,  H04L1/02

CPC分类号： H04L1/0054 ,  H04L1/0041 ,  H04L1/0618

摘要： According to one aspect of the present invention, there is provided a signal transmission apparatus for a mobile communication system. In the signal transmission apparatus, a frame segmentation section segments an input frame into Bk bit group, where k=1, . . . , K. A first group of encoders encodes Bk bit group and outputs encoded symbols. A second group of encoders encodes other Bk′ bit group and output other encoded symbols. Each encoded symbol is encoded again to the transmit antennas using different functions. A transmission section includes a plurality of antennas in groups of a predetermined number of antennas, and the total number N of antennas is larger than the sum of the number of antenna groups. The transmission antennas transmit symbols encoded by one of the encoders.

摘要翻译： 根据本发明的一个方面，提供了一种用于移动通信系统的信号传输装置。 在信号发送装置中，帧分割部将输入帧分割为B = K位组，其中k = 1。 。 。 ，K.第一组编码器编码比特组，并输出编码的符号。 第二组编码器编码其他B＆gt; k'/ bit比特组并输出其他编码符号。 使用不同的功能将每个编码符号再次编码到发射天线。 传输部分包括预定数量的天线的多个天线，并且天线的总数N大于天线组的数量的总和。 发射天线发射由编码器之一编码的符号。

公开(公告)号：US07154970B1

公开(公告)日：2006-12-26

申请号：US11224840

申请日：2005-09-13

申请人： Hamid Jafarkhani ,  Vahid Tarokh

发明人： Hamid Jafarkhani ,  Vahid Tarokh

IPC分类号： H04B7/10 ,  H04L1/02

CPC分类号： H04B7/0894 ,  H04L1/0631 ,  H04L1/0668

摘要： Input signals of each frame are encoded by mapping the signals onto a coordinate system dictated by the symbols of the previous frame, and symbols from a constellation are selected based on the results of such mapping. Received signals are detected by preprocessing the signals detected at each antenna with signals detected by the antenna at the immediately previous frame, and then applied to a maximum likelihood detector circuit, followed by an inverse mapping circuit.