公开(公告)号：US20090010359A1

公开(公告)日：2009-01-08

申请号：US12165884

申请日：2008-07-01

申请人： In-Soo Hwang ,  Yung-Soo Kim ,  Myeon-Kyun Cho ,  Eun-Seok Ko ,  Vahid Tarokh

发明人： In-Soo Hwang ,  Yung-Soo Kim ,  Myeon-Kyun Cho ,  Eun-Seok Ko ,  Vahid Tarokh

IPC分类号： H04L27/04

CPC分类号： H04W52/42 ,  H04L25/0206

摘要： An apparatus and a method for interference cancellation in a transmitting end of a multi-antenna system are provided. A precode is generated which maximizes a diversity gain of one or more receive antennas using channel information of the receive antennas to be serviced. Transmit powers of the receive antennas are updated by taking into account a power loss and a shaping loss according to a dirty paper coding. Transmit signals are precoded by updating the precode according to the updated transmit powers. The dirty paper coding is performed on the precoded transmit signals to be transmitted to the receive antennas.

摘要翻译： 提供了一种用于多天线系统的发送端的干扰消除的装置和方法。 生成使用要维护的接收天线的信道信息使一个或多个接收天线的分集增益最大化的预编码。 通过根据脏纸编码考虑功率损耗和成形损耗来更新接收天线的发射功率。 通过根据更新的发射功率更新预编码来对发射信号进行预编码。 对要发送到接收天线的预编码的发送信号执行脏纸编码。

公开(公告)号：US20090010349A1

公开(公告)日：2009-01-08

申请号：US12166750

申请日：2008-07-02

申请人： Eun-Seok Ko ,  Yung-Soo Kim ,  Myeon-Kyun Cho ,  In-Soo Hwang ,  Vahid Tarokh

发明人： Eun-Seok Ko ,  Yung-Soo Kim ,  Myeon-Kyun Cho ,  In-Soo Hwang ,  Vahid Tarokh

IPC分类号： H04L27/28

CPC分类号： H04L25/0204 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/06 ,  H04L1/20

摘要： An apparatus and method for generating an effective Signal to Noise Ratio (SNR) per stream in a Multiple Input Multiple Output (MIMO) wireless communication system is disclosed. The apparatus includes a selector, a calculator, a generator, and a decider. The selector selects effective streams among whole streams. The calculator calculates a relative SNR rate between the effective streams. The generator generates an equation having as a solution an SNR of a first effective stream. The decider decides an SNR per effective stream using the solution of the equation and the relative SNR rate.

摘要翻译： 公开了一种用于在多输入多输出（MIMO）无线通信系统中产生每个流的有效信噪比（SNR）的装置和方法。 该装置包括选择器，计算器，发生器和决定器。 选择器在整个流中选择有效的流。 计算器计算有效流之间的相对SNR率。 发生器产生具有作为第一有效流的SNR的解的等式。 决策者使用公式的解和相对SNR率决定每个有效流的SNR。

公开(公告)号：US20080198071A1

公开(公告)日：2008-08-21

申请号：US12030639

申请日：2008-02-13

申请人： In-Soo Hwang ,  Myeon-Kyun Cho ,  Dong-Ho Kim ,  Young-Ho Jung ,  Yung-Soo Kim ,  Yu-Seok Kim ,  Vahid Tarokh

发明人： In-Soo Hwang ,  Myeon-Kyun Cho ,  Dong-Ho Kim ,  Young-Ho Jung ,  Yung-Soo Kim ,  Yu-Seok Kim ,  Vahid Tarokh

IPC分类号： H01Q3/00

CPC分类号： H04B7/0617 ,  H04B7/0447 ,  H04B7/0669

摘要： An apparatus and method for removing interference in a transmitting end of a multi-antenna system are provided. The method includes receiving channel information for all Receive (Rx) antennas; calculating a beam-forming matrix that maximizes a Signal-to-Interference plus Noise Ratio (SINR) for each Rx antenna by using the received channel information; calculating an integer value which is in proportion to an interference signal for each Rx antenna by using the received channel information and the calculated beam-forming matrix, and performing Dirty Paper Coding (DPC) on a Transmit (Tx) signal by using the calculated integer value; and performing beam-forming by multiplying the Tx signal that has undergone the DPC by the calculated beam-forming matrix. Accordingly, a highest data rate for each user and a highest diversity can be obtained.

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。 该方法包括接收所有接收（Rx）天线的信道信息; 计算通过使用所接收的信道信息使每个Rx天线的信号与干扰加噪声比（SINR）最大化的波束形成矩阵; 通过使用所接收的信道信息和所计算的波束形成矩阵来计算与每个Rx天线的干扰信号成比例的整数值，并且通过使用所计算的整数对发送（Tx）信号执行脏纸编码（DPC） 值; 并且通过将已经经历DPC的Tx信号乘以所计算的波束形成矩阵来执行波束形成。 因此，可以获得每个用户的最高数据速率和最高的分集度。

公开(公告)号：US09072065B2

公开(公告)日：2015-06-30

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： H04B7/00 ,  H04W52/38 ,  H04W52/22

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：US08412106B2

公开(公告)日：2013-04-02

申请号：US10700329

申请日：2003-11-03

申请人： Marcus da Silva ,  William J. Crilly, Jr. ,  James Brennan ,  Robert J. Conley ,  Siavash Alamouti ,  Eduardo Casas ,  Hujun Yin ,  Bobby Jose ,  Yang-Seok Choi ,  Vahid Tarokh ,  Praveen Mehrotra

发明人： Marcus da Silva ,  William J. Crilly, Jr. ,  James Brennan ,  Robert J. Conley ,  Siavash Alamouti ,  Eduardo Casas ,  Hujun Yin ,  Bobby Jose ,  Yang-Seok Choi ,  Vahid Tarokh ,  Praveen Mehrotra

IPC分类号： H04B1/00

CPC分类号： H04B7/0617 ,  H04B7/04 ,  H04B7/0621 ,  H04W16/28 ,  H04W72/046

摘要： In an implementation of directed wireless communication, a multi-beam directed signal system coordinates directed wireless communication with client devices. A transmit beam-forming network routes data communication transmissions to the client devices via directed communication beams that are emanated from an antenna assembly, and a receive beam-forming network receives data communication receptions from the client devices via the directed communication beams.

摘要翻译： 在有向无线通信的实现中，多波束定向信号系统与客户端设备协调定向无线通信。 发射波束形成网络经由从天线组件发出的定向通信波束将数据通信传输路由到客户机设备，并且接收波束形成网络经由定向通信波束从客户端设备接收数据通信接收。

公开(公告)号：US08386898B2

公开(公告)日：2013-02-26

申请号：US11974395

申请日：2007-10-12

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： H03M13/03 ,  H03M13/00

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 MLSE 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.

公开(公告)号：US08355475B2

公开(公告)日：2013-01-15

申请号：US13073369

申请日：2011-03-28

申请人： Siavash Alamouti ,  Vahid Tarokh

发明人： Siavash Alamouti ,  Vahid Tarokh

IPC分类号： H04B7/10 ,  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 simple arithmetic operations, such as negation and conjugation. The diversity created by the 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:

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，创建具有通过多个发送信道发送的符号的简单块编码布置。 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，通过在不同时间的冗余发送来实现时间分集，并且通过以不同频率进行冗余发送来实现频率分集：

公开(公告)号：US08245116B2

公开(公告)日：2012-08-14

申请号：US13007435

申请日：2011-01-14

申请人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

发明人： Philip Orlik ,  Raymond Yim ,  Kieran Parsons ,  Vahid Tarokh ,  Jinyun Zhang

IPC分类号： H03M13/00

CPC分类号： H03M13/136 ,  H03M13/3905 ,  H03M13/45 ,  H03M13/458 ,  H04L1/0054

摘要： Soft decision decoding of a codeword of a Reed-Muller (RM) code by selecting an optimal decomposition variable i using a likelihood calculation. A code RM(r, m) is expressed as {(u, uv)|uεRM(r, m−1) and vεRM(r−1, m−1)}, where uv denotes a component-wise multiplication of u and v, and (u, uv)=(r1, r2). A receive codeword is separated into r1=u and r2=uv based on the optimal decomposition variable, and r2 is decoded according to the optimal decomposition variable, using a RM(r−1, m−1) decoder to obtain a decoded v and a first set of decoded bits. The decoded v is combined with r1 using (r1+r2v)/2, and (r1+r2v)/2 is decoded using a RM(r, m−1) decoder to obtain a decoded u and a second set of decoded bits.

摘要翻译： 通过使用似然率计算选择最优分解变量i，对Reed-Muller（RM）码的码字进行软判决解码。 代码RM（r，m）表示为{（u，uv）| u＆egr; RM（r，m-1）和v＆egr; RM（r-1，m-1）}，其中uv表示分量 u和v的乘法，（u，uv）=（r1，r2）。 基于最优分解变量将接收码字分为r1 = u和r2 = uv，并使用RM（r-1，m-1）解码器根据最优分解变量对r2进行解码，以获得解码的v和 第一组解码位。 使用（r1 + r2v）/ 2将解码的v与r1组合，并且使用RM（r，m-1）解码器对（r1 + r2v）/ 2进行解码，以获得解码的u和第二组解码比特。

公开(公告)号：US08195242B2

公开(公告)日：2012-06-05

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： H04B1/00

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：US20110013568A1

公开(公告)日：2011-01-20

申请号：US12504352

申请日：2009-07-16

申请人： Raymond Yim ,  Vahid Tarokh ,  Jinyun Zhang ,  Yasushi Iwane

发明人： Raymond Yim ,  Vahid Tarokh ,  Jinyun Zhang ,  Yasushi Iwane

IPC分类号： H04W72/00

CPC分类号： H04W28/16 ,  H04W16/12 ,  H04W84/045

摘要： Frequencies are allocated in a wireless network, wherein the network includes a set of macrocells and a set of femtocells, and wherein each macrocell includes a base station (BS) and each femtocell includes a femtocell base station. A frequency spectrum is assigned to the network. The frequency spectrum is partitioned into bands of frequencies. The bands of frequencies are allocated to the set of BS for communicating with user equipments (UE) in the set of macro cells, and guard bands of frequencies, within which no data are transmitted between the UE and the macro cell BS. The guard bands are assigned to the set of femtocell base station for communicating with UE in the set of femtocells.

摘要翻译： 在无线网络中分配频率，其中网络包括一组宏小区和一组毫微微小区，并且其中每个宏小区包括基站（BS），并且每个毫微微小区包括毫微微小区基站。 频谱被分配给网络。 频谱被分割成频带。 将频带分配给用于与该小区集合中的用户设备（UE）通信的BS组，以及在UE和宏小区BS之间没有数据传输的保护频带。 保护频带被分配给毫微微小区基站的集合，用于与毫微微小区组中的UE进行通信。