公开(公告)号：US07120200B2

公开(公告)日：2006-10-10

申请号：US10873567

申请日：2004-06-22

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 of 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. Illustratively, using two transmit antennas and a single receive antenna, one of the disclosed embodiments provides the 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.

公开(公告)号：US20060146693A1

公开(公告)日：2006-07-06

申请号：US11302872

申请日：2005-12-14

申请人： Ryosuke Mori ,  Koji Setoh ,  Daisuke Hayashi ,  Tetsuya Yagi ,  Noritaka Iguchi ,  Akira Kisoda ,  Sadashi Kageyama

发明人： Ryosuke Mori ,  Koji Setoh ,  Daisuke Hayashi ,  Tetsuya Yagi ,  Noritaka Iguchi ,  Akira Kisoda ,  Sadashi Kageyama

IPC分类号： H04Q7/00 ,  H04Q7/24 ,  H04J11/00

CPC分类号： H04L27/265 ,  H04B7/0845 ,  H04L27/2633

摘要： Disclosed is an OFDM signal receiving apparatus for diversity reception, with a plurality of antennas, of an OFDM signal containing Y sub-carriers, where 2X−1 1. The OFDM signal receiving apparatus includes a plurality of receiving systems, and a diversity processing unit connected to the receiving systems and fed with sequences of data on sub-carriers demodulated by the respective receiving systems. At least one of the receiving systems includes an FFT circuit for Fast Fourier transforming, in parallel, only a sequence of data on 2Z sub-carriers contained in the OFDM signal received with a corresponding antenna, where X>Z. The diversity processing unit performs a diversity process on sequences of data on sub-carriers, out of all the Y sub-carries, redundantly demodulated.

摘要翻译： 公开了一种OFDM信号接收装置，用于分集接收包含Y个子载波的OFDM信号的多个天线，其中，2个X-1 和X> 1。 OFDM信号接收装置包括多个接收系统，以及连接到接收系统的分集处理单元，并且馈送有由各个接收系统解调的子载波上的数据序列。 至少一个接收系统包括用于快速傅里叶变换的FFT电路，其并行地仅包含在用相应的天线接收的OFDM信号中的2个子载波上的数据序列，其中X > Z。 在所有Y子载波中，分集处理单元对子载波上的数据序列执行分集处理，被冗余地解调。

公开(公告)号：US06965762B2

公开(公告)日：2005-11-15

申请号：US10695229

申请日：2003-10-28

申请人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

发明人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Yohannes Tesfai

IPC分类号： H01Q3/28 ,  H03G3/30 ,  H04B1/04 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04B1/06 ,  H04B1/10 ,  H04B7/00 ,  H04B15/00 ,  H04B17/00

CPC分类号： H04L5/0007 ,  H01Q3/28 ,  H03G3/3042 ,  H03G3/3089 ,  H04B1/0483 ,  H04B7/0417 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0669 ,  H04B7/0671 ,  H04B7/0845 ,  H04B7/0848 ,  H04B7/0854 ,  H04B7/0857 ,  H04L1/06 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/03343 ,  H04L27/2602 ,  H04L27/2626 ,  H04L2025/03426 ,  H04L2025/03611 ,  H04W52/42

摘要： A composite beamforming technique is provided wherein a first communication device has a plurality of antennas and the second communication has a plurality of antennas. When the first communication device transmits to the second communication device, the transmit signal is multiplied by a transmit weight vector for transmission by each the plurality of antennas and the transmit signals are received by the plurality of antennas at the second communication device. The second communication device determines the best receive weight vector for the its antennas, and from that vector, derives a suitable transmit weight vector for transmission on the plurality of antennas back to the first communication device. Several techniques are provided to determine the optimum transmit weight vector and receive weight vector for communication between the first and second communication devices so that there is effectively joint or composite beamforming between the communication devices.

摘要翻译： 提供一种组合波束形成技术，其中第一通信设备具有多个天线，并且第二通信具有多个天线。 当第一通信设备向第二通信设备发送时，将发送信号乘以用于由多个天线中的每一个发送的发送权重向量，并且在第二通信设备处由多个天线接收发送信号。 第二通信设备确定其天线的最佳接收权重向量，并且从该向量导出用于在多个天线上发送回到第一通信设备的合适的发射权重向量。 提供了几种技术来确定用于第一和第二通信设备之间的通信的最佳发送权重向量和接收权重向量，使得在通信设备之间有效地进行联合或合成波束形成。

公开(公告)号：US06947474B2

公开(公告)日：2005-09-20

申请号：US09765553

申请日：2001-01-18

申请人： Wolfgang Kober ,  John K. Thomas ,  Marvin L. Vis

发明人： Wolfgang Kober ,  John K. Thomas ,  Marvin L. Vis

IPC分类号： G01S1/04 ,  G01S7/02 ,  G01S7/285 ,  H01Q3/26 ,  H03M1/12 ,  H04B1/10 ,  H04B1/709 ,  H04B1/7107 ,  H04B7/08 ,  H04B7/10 ,  H04B1/707 ,  H04B7/216 ,  H04L1/02

CPC分类号： H04B7/0845 ,  G01S1/045 ,  G01S7/021 ,  G01S7/285 ,  H01Q3/2605 ,  H04B1/1081 ,  H04B1/709 ,  H04B1/7107 ,  H04B7/0891 ,  H04B7/10

摘要： The architecture of the present invention is premised upon an algorithm involving integration of oblique correlators and RAKE filtering to null interference from other spread spectrum signals. The oblique correlator is based on the non-orthogonal projections that are optimum for nulling structured signals such as spread spectrum signals. In one configuration, space spanned by a first signal associated with a first emitter is orthogonal to an interference space associated with one or more signals of one or more other emitters. RAKE filtering is used to rapidly steer the beam of the multi-antenna system and to mitigate the effects of multipath.

摘要翻译： 本发明的架构前提是涉及将倾斜相关器和RAKE滤波整合到来自其它扩频信号的零干扰的算法。 倾斜相关器基于对于诸如扩频信号之类的结构化信号进行归零最佳的非正交投影。 在一个配置中，由与第一发射器相关联的第一信号跨越的空间与与一个或多个其它发射器的一个或多个信号相关联的干扰空间正交。 RAKE滤波用于快速引导多天线系统的波束并减轻多径的影响。

公开(公告)号：US20050170802A1

公开(公告)日：2005-08-04

申请号：US11047766

申请日：2005-02-02

申请人： Hyun Oh ,  Hyun Yu ,  Hye Lee ,  Gin Choi ,  Yong Moon ,  Hyun Lee ,  Young Lim

发明人： Hyun Oh ,  Hyun Yu ,  Hye Lee ,  Gin Choi ,  Yong Moon ,  Hyun Lee ,  Young Lim

IPC分类号： H04J99/00 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/04 ,  H04B7/08 ,  H04B17/40 ,  H04B17/00 ,  H04M1/00

CPC分类号： H04B7/0868 ,  H04B1/7107 ,  H04B7/0413 ,  H04B7/0678 ,  H04B7/0697 ,  H04B7/0845 ,  H04B7/0854 ,  H04L1/0631 ,  H04L1/0656 ,  H04L25/03006 ,  H04L2025/03426

摘要： An apparatus and method for receiving a signal in a MIMO communication system are provided. In the signal receiving method, a first received signal received at each of the receive antennas is equalized in a predetermined first method. Each of the equalized transmit antenna signals is despread with a plurality of spreading codes used in a transmitter. The strongest transmit antenna signal is detected among the despread transmit antenna signals, and decoded in a predetermined second method, for error verification. The verified strongest transmit antenna signal is reproduced as an interference signal. A second received signal is generated by subtracting the interference signal from the first received signal and equalized in the first method. The above operation is repeated on the equalized transmit antenna signals except the strongest transmit antenna signal.

摘要翻译： 提供了一种用于在MIMO通信系统中接收信号的装置和方法。 在信号接收方法中，在每个接收天线处接收的第一接收信号以预定的第一方法相等。 每个均衡的发射天线信号用在发射机中使用的多个扩展码进行解扩。 在解扩展的发射天线信号中检测最强的发射天线信号，并以预定的第二种方法进行解码，用于错误验证。 验证的最强发射天线信号作为干扰信号被再现。 通过从第一接收信号中减去干扰信号并在第一种方法中相等化来生成第二接收信号。 在除了最强的发射天线信号之外的均衡的发射天线信号上重复上述操作。

公开(公告)号：US20050117532A1

公开(公告)日：2005-06-02

申请号：US11030662

申请日：2005-01-05

申请人： Jianzhong Zhang ,  Tejas Bhatt ,  Giridhar Mandyam

发明人： Jianzhong Zhang ,  Tejas Bhatt ,  Giridhar Mandyam

IPC分类号： H04B7/08 ,  H04L25/03 ,  H04B7/216

CPC分类号： H04L25/0242 ,  H04B7/0845 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0256 ,  H04L25/03159 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03522 ,  H04L2025/03605

摘要： In the reception of a CDMA signal, the receiving unit performs a simplified process of linear equalization that eliminates the need for inverting the correlation matrix. For the single antenna reception case, the correlation matrix is approximated to a good degree by a circulation matrix that is diagonalized by FFT operations, thus substituting two FFTs and one IFFT having a complexity of O(3/2 LF log LF) for the direct matrix inversion having a complexity of O(LF3). The extension of this method uses a multiple antenna reception system with oversampling.

摘要翻译： 在CDMA信号的接收中，接收单元执行线性均衡的简化处理，消除了反相相关矩阵的需要。 对于单天线接收情况，相关矩阵通过由FFT操作对角化的循环矩阵来很好地近似，因此将两个FFT和一个复杂度为O（3 / 2L / 对于具有复杂度为O（L> F 3> 3）的直接矩阵求逆的方程式。 该方法的扩展使用具有过采样的多天线接收系统。

公开(公告)号：US06882678B2

公开(公告)日：2005-04-19

申请号：US09728459

申请日：2000-12-01

申请人： Ning Kong ,  Xue-Song Zhou

发明人： Ning Kong ,  Xue-Song Zhou

IPC分类号： H04K1/00 ,  H04L27/30

CPC分类号： H04B1/712 ,  H04B1/7107 ,  H04B7/0845 ,  H04B7/0857 ,  H04B7/0897

摘要： A receiver for the third-generation (“3G”) CDMA wireless system is disclosed. The receiver is adapted to mitigate the correlated interference by adaptive antenna process which will maximize the signal-to-interference-plus-noise ratio. After the mitigation of correlated interference from first step space process, the second step is to counter fading with MRC which is optimum after the mitigation of correlated interference. After these first two steps of interference mitigation by adaptive antennas and fading compensation through MRC, the decision signal for the first stage of MPIC will have the strongest desired part and least interference compared to any MPIC available. As can be appreciated, the first stage BER of the present receiver will be the lowest. Then, this low BER will result in a more accurate MAI regeneration, which will further cause a lower BER for the next stage and any subsequent stages. Therefore, the BER of the receiver of the present invention is more likely to converge to the BER of a single user, i.e. MAI-free, faster than those in the conventional systems. In other words, for a given BER requirement, the receiver of the present invention will take the least number of iterations to achieve.

摘要翻译： 公开了第三代（“3G”）CDMA无线系统的接收机。 接收机适用于通过自适应天线处理来减轻相关干扰，这将使信号与干扰加噪声比达到最大。 在缓解来自第一阶段空间过程的相关干扰之后，第二步是在缓解相关干扰之后，用最适合的MRC对抗衰落。 在通过自适应天线进行干扰减轻的前两个步骤和通过MRC进行衰落补偿之后，与可用的任何MPIC相比，MPIC的第一级的判决信号将具有最强的期望部分和最小的干扰。 可以理解，本接收机的第一级BER将是最低的。 然后，这个低BER将导致更准确的MAI再生，这将进一步导致下一阶段和任何后续阶段的较低BER。 因此，本发明的接收机的BER比常规系统中更容易收敛到单个用户的BER，即无MAI。 换句话说，对于给定的BER要求，本发明的接收机将获得最少的迭代次数来实现。

公开(公告)号：US06788734B2

公开(公告)日：2004-09-07

申请号：US10141999

申请日：2002-05-08

申请人： Wolfgang Kober ,  John K. Thomas ,  Marvin L. Vis

发明人： Wolfgang Kober ,  John K. Thomas ,  Marvin L. Vis

IPC分类号： H04B1707

CPC分类号： H04B1/7115 ,  H01Q3/2605 ,  H04B1/1081 ,  H04B1/709 ,  H04B1/7107 ,  H04B1/71072 ,  H04B1/712 ,  H04B7/0845 ,  H04B7/0891 ,  H04B7/10

摘要： The architecture of the present invention is premised upon an algorithm involving integration of oblique correlators and RAKE filtering to null interference from other spread spectrum signals. The oblique correlator is, of course, based on the non-orthogonal projections that are optimum for nulling structured signals such as spread spectrum signals. RAKE filtering is used to rapidly steer the beam of the multi-antenna system and to mitigate the effects of multipath.

摘要翻译： 本发明的架构前提是涉及将倾斜相关器和RAKE滤波整合到来自其它扩频信号的零干扰的算法。 当然，倾斜相关器基于对于诸如扩频信号之类的结构化信号进行归零最佳的非正交投影。 RAKE滤波用于快速引导多天线系统的波束并减轻多径的影响。

公开(公告)号：US20040142729A1

公开(公告)日：2004-07-22

申请号：US10714119

申请日：2003-11-14

发明人： Yasuaki Yuda ,  Takaaki Kishigami ,  Takashi Fukagawa ,  Keiji Takakusaki ,  Shoji Miyamoto

IPC分类号： H04B001/38

CPC分类号： H04B7/0845 ,  H01Q3/267 ,  H04B7/0891 ,  H04B17/20 ,  H04B2201/70701

摘要： A radio communication apparatus using an array antenna has a plurality of reception branches for conveying reception signals received at the antenna element of the array antenna, and a calibration branch for selecting one of the plurality of reception branches and conveying the reception signal. Channel estimations are made respectively on the reception-branch signals and a calibration-branch signal. RAKE composition is made on the channel estimation values, a result of which is used to detect amplitude and phase deviations on the reception branch thereby carrying out a correction.

摘要翻译： 使用阵列天线的无线电通信装置具有用于传送在阵列天线的天线元件处接收的接收信号的多个接收分支和用于选择多个接收分支之一并传送接收信号的校准分支。 分别对接收分支信号和校准分支信号进行信道估计。 根据信道估计值进行RAKE组合，其结果用于检测接收分支上的幅度和相位偏差，从而进行校正。

公开(公告)号：US20040120431A1

公开(公告)日：2004-06-24

申请号：US10326025

申请日：2002-12-19

发明人： Manoneet Singh ,  Sirikiat Lek Ariyavisitakul ,  Bruce R. Kendall

IPC分类号： H04L001/00 ,  H03D001/04

CPC分类号： H04B1/7097 ,  H04B7/0842 ,  H04B7/0845 ,  H04B7/0857 ,  H04L1/06

摘要： A wireless receiver for receiving an incoming signal having spatial and temporal diversity. The receiver uses noise-based prescaling of multiple receiver chain signals for optimally combining the receiver chain signals in a composite equalized signal and uses noise-based time-varying postscaling the equalized signal. The receiver determines noise-based scale factors by comparing signal symbols to dispersed replica symbols of a training sequence for the incoming signal.

摘要翻译： 一种用于接收具有空间和时间分集的输入信号的无线接收器。 接收机使用基于噪声的多个接收器链信号的预分频器来最佳地组合复合均衡信号中的接收器链信号，并且使用基于噪声的时变后均衡信号。 接收机通过将信号符号与输入信号的训练序列的分散复制符号进行比较来确定基于噪声的比例因子。