公开(公告)号：US06873606B2

公开(公告)日：2005-03-29

申请号：US10367234

申请日：2003-02-14

申请人： Avneesh Agrawal ,  Rajiv Vijayan ,  Tamer Kadous

发明人： Avneesh Agrawal ,  Rajiv Vijayan ,  Tamer Kadous

IPC分类号： H04B7/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04B1/02

CPC分类号： H04L1/0618 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0465 ,  H04B7/0615 ,  H04B7/0891 ,  H04W52/34 ,  H04W52/42

摘要： A rate adaptive transmission scheme for MIMO systems, which can transmit a variable number of data symbol streams, provide transmit diversity for each data symbol stream, and fully utilize the total transmit power of the system and the full power of each antenna. In one method, at least one data symbol stream is received for transmission from a plurality of antennas. Each data symbol stream is scaled with a respective weight corresponding to the amount of transmit power allocated to that stream. The scaled data symbol stream(s) are multiplied with a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas. The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a DFT matrix) is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at (or near) the full power for the associated antenna.

摘要翻译： 可以传输可变数量的数据符号流的MIMO系统的速率自适应传输方案为每个数据符号流提供发射分集，并且充分利用系统的总发射功率和每个天线的全功率。 在一种方法中，接收至少一个数据符号流用于从多个天线发射。 每个数据符号流用对应于分配给该流的发射功率的量的相应权重进行缩放。 缩放的数据符号流与发射基矩阵相乘以为多个天线提供多个发射符号流。 定义发射基矩阵（例如，沃尔什 - 哈达玛矩阵或DFT矩阵），使得每个数据符号流从所有天线发送，并且每个发射符号流以（或接近）相关天线的全功率发射。

公开(公告)号：US20050013239A1

公开(公告)日：2005-01-20

申请号：US10919698

申请日：2004-08-16

申请人： Avneesh Agrawal ,  Rajiv Vijayan ,  Tamer Kadous

发明人： Avneesh Agrawal ,  Rajiv Vijayan ,  Tamer Kadous

IPC分类号： H04B7/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04J11/00 ,  H04Q7/00

CPC分类号： H04L1/0618 ,  H04B7/0417 ,  H04B7/0443 ,  H04B7/0465 ,  H04B7/0615 ,  H04B7/0891 ,  H04W52/34 ,  H04W52/42

摘要： A rate adaptive transmission scheme for MIMO systems, which can transmit a variable number of data symbol streams, provide transmit diversity for each data symbol stream, and fully utilize the total transmit power of the system and the full power of each antenna. In one method, at least one data symbol stream is received for transmission from a plurality of antennas. Each data symbol stream is scaled with a respective weight corresponding to the amount of transmit power allocated to that stream. The scaled data symbol stream(s) are multiplied with a transmit basis matrix to provide a plurality of transmit symbol streams for the plurality of antennas. The transmit basis matrix (e.g., a Walsh-Hadamard matrix or a DFT matrix) is defined such that each data symbol stream is transmitted from all antennas and each transmit symbol stream is transmitted at (or near) the full power for the associated antenna.

摘要翻译： 可以传输可变数量的数据符号流的MIMO系统的速率自适应传输方案为每个数据符号流提供发射分集，并且充分利用系统的总发射功率和每个天线的全功率。 在一种方法中，接收至少一个数据符号流用于从多个天线发射。 每个数据符号流用对应于分配给该流的发射功率的量的相应权重进行缩放。 缩放的数据符号流与发射基矩阵相乘以为多个天线提供多个发射符号流。 定义发射基矩阵（例如，沃尔什 - 哈达玛矩阵或DFT矩阵），使得每个数据符号流从所有天线发送，并且每个发射符号流以（或接近）相关天线的全功率发射。

公开(公告)号：US20050008092A1

公开(公告)日：2005-01-13

申请号：US10917079

申请日：2004-08-11

申请人： Tamer Kadous

发明人： Tamer Kadous

IPC分类号： H04L1/06 ,  H04B3/46

CPC分类号： H04L1/0618

摘要： Techniques to process a number of “received” symbol streams in a Multiple-Input Multiple-Output (MIMO) system with multipath channels such that improved performance may be achieved when using successive interference cancellation (SIC) processing. In an aspect, metrics indicative of the quality or “goodness” of a “detected” symbol stream are provided. These metrics consider the frequency selective response of the multipath channels used to transmit the symbol stream. For example, the metrics may relate to (1) an overall channel capacity for all transmission channels used for the symbol stream, or (2) an equivalent signal-to-interference noise ratio (SNR) of an Additive White Gaussian Noise (AWGN) channel modeling these transmission channels. In another aspect, techniques are provided to process the received symbol streams, using SIC processing, to recover a number of transmitted symbol streams. The particular order in which the symbol streams are recovered is determined based on the metrics determined for symbol streams detected at each SIC processing stage.

摘要翻译： 在具有多路径信道的多输入多输出（MIMO）系统中处理多个“接收”符号流的技术，使得当使用连续干扰消除（SIC）处理时可以实现改进的性能。 在一方面，提供了指示“检测”符号流的质量或“良好”的度量。 这些度量考虑了用于发送符号流的多径信道的频率选择响应。 例如，度量可以涉及（1）用于符号流的所有传输信道的总体信道容量，或者（2）加性白高斯噪声（AWGN）的等效信号与干扰噪声比（SNR） 通道建模这些传输通道。 在另一方面，提供了使用SIC处理来处理所接收的符号流的技术来恢复多个传输的符号流。 基于为在每个SIC处理阶段检测到的符号流确定的度量来确定符号流被恢复的特定顺序。

公开(公告)号：US09172453B2

公开(公告)日：2015-10-27

申请号：US11261064

申请日：2005-10-27

申请人： Jibing Wang ,  Tamer Kadous ,  Dhananjay Ashok Gore

发明人： Jibing Wang ,  Tamer Kadous ,  Dhananjay Ashok Gore

IPC分类号： H04J1/00 ,  H04B7/06

CPC分类号： H04B7/0639 ,  H04B7/063

摘要： Accordingly, a method and apparatus are provided wherein a receiver system selects a pre-coding matrix, comprising eigen-beamforming weights, to use and provides rank value and matrix index associated with the selected matrix to the transmitter system. The transmitter system upon receiving the rank value and matrix index, determine if the matrix associated with the matrix index provided by the receiver system can be used. If not, them transmitter system selects another matrix for determining eigen-beamforming weights.

摘要翻译： 因此，提供了一种方法和装置，其中接收机系统选择包括特征波束形成权重的预编码矩阵，以使用并向发射机系统提供与所选矩阵相关联的秩值和矩阵索引。 发射机系统在接收到秩值和矩阵索引后，确定是否可以使用与接收机系统提供的矩阵索引关联的矩阵。 如果不是，则它们发射机系统选择用于确定特征波束形成权重的另一矩阵。

公开(公告)号：US08908496B2

公开(公告)日：2014-12-09

申请号：US10801624

申请日：2004-03-15

申请人： Tamer Kadous

发明人： Tamer Kadous

IPC分类号： G01R31/08 ,  H04L1/18 ,  H04L1/00 ,  H03M13/33 ,  H04L5/00 ,  H04L1/16 ,  H04L1/06 ,  H04L27/26

CPC分类号： H04L1/1819 ,  H03M13/33 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/1671 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2626 ,  H04L27/2647

摘要： For an incremental redundancy (IR) transmission in a MIMO system, a transmitter processes (e.g., encodes, partitions, interleaves, and modulates) a data packet based on a selected rate to obtain multiple data symbol blocks. The transmitter transmits one data symbol block at a time until a receiver correctly recovers the data packet or all blocks are transmitted. Whenever a data symbol block is received from the transmitter, the receiver detects a received symbol block to obtain a detected symbol block, processes (e.g., demodulates, deinterleaves, re-assembles, and decodes) all detected symbol blocks obtained for the data packet, and provides a decoded packet. If the decoded packet is in error, then the receiver repeats the processing when another data symbol block is received for the data packet. The receiver may also perform iterative detection and decoding on the received symbol blocks for the data packet multiple times to obtain the decoded packet.

摘要翻译： 对于MIMO系统中的增量冗余（IR）传输，发射机基于所选择的速率处理（例如，编码，分割，交织和调制）数据分组，以获得多个数据符号块。 发射机一次发送一个数据符号块，直到接收机正确地恢复数据包或者所有块都被发送。 每当从发射机接收到数据符号块时，接收机检测接收的符号块以获得检测到的符号块，处理（例如，解调，解交织，重新组合和解码）为数据分组获得的所有检测到的符号块， 并提供解码的分组。 如果解码的分组是错误的，那么当接收到数据分组的另一数据符号块时，接收机重复该处理。 接收机也可以多次对数据包的接收符号块执行迭代检测和解码，以获得解码的分组。

公开(公告)号：US08139672B2

公开(公告)日：2012-03-20

申请号：US11390622

申请日：2006-03-27

申请人： Dhananjay Ashok Gore ,  Tingfang Ji ,  Tamer Kadous

发明人： Dhananjay Ashok Gore ,  Tingfang Ji ,  Tamer Kadous

IPC分类号： H04L27/00

CPC分类号： H04L27/2613 ,  H04B7/0413 ,  H04L25/0226

摘要： Systems and methodologies are described that facilitate improved pilot information to MIMO user devices without increasing interference of SISO user devices in a wireless communication environment. A data communication signal can be generated and transmitted at a first power level, and a continuous pilot waveform comprising pilot information related to the data signal can be generated and sent at a second power level below the first transmission power level. Alternatively, a discontinuous pilot waveform can be generated so that it does not overlap with pilot segments in the first waveform, and can be transmitted at the first power level without interfering with the first waveform as received by a SISO user device. A MIMO user device can receive both waveforms, and can employ the pilot waveform to better estimate a MIMO channel for the first waveform.

摘要翻译： 描述了在不增加SISO用户设备在无线通信环境中的干扰的情况下促进对MIMO用户设备的改进的导频信息的系统和方法。 可以以第一功率电平生成并发送数据通信信号，并且可以以低于第一发送功率电平的第二功率电平生成包括与数据信号相关的导频信息的连续导频波形。 或者，可以生成不连续的导频波形，使得其不与第一波形中的导频段重叠，并且可以在不干扰由SISO用户设备接收的第一波形的情况下以第一功率电平发送。 MIMO用户设备可以接收两个波形，并且可以使用导频波形来更好地估计用于第一波形的MIMO信道。

公开(公告)号：US08077691B2

公开(公告)日：2011-12-13

申请号：US11020888

申请日：2004-12-22

申请人： Tamer Kadous ,  Avneesh Agrawal ,  Dhananjay Ashok Gore

发明人： Tamer Kadous ,  Avneesh Agrawal ,  Dhananjay Ashok Gore

IPC分类号： H04B7/208

CPC分类号： H04L25/0226 ,  H04B7/0684

摘要： A transmitter generates multiple composite pilots with a training matrix and a gain matrix. Each composite pilot includes multiple training pilots generated with multiple columns of the training matrix and scaled with multiple gain elements in a column of the gain matrix. The transmitter transmits each composite pilot via multiple transmit antennas. A MISO receiver obtains received symbols for the multiple composite pilots and derives an estimate of a composite MISO channel. For OFDM, the MISO receiver derives an initial impulse response estimate for each composite pilot, filters the initial impulse response estimates for all composite pilots, and derives a frequency response estimate for the composite MISO channel. A MIMO receiver obtains and processes received symbols for the multiple composite pilots based on the training and gain matrices and derives channel estimates for individual SISO channels between the multiple transmit antennas and multiple receive antennas.

摘要翻译： 发射机生成具有训练矩阵和增益矩阵的多个复合导频。 每个复合导频包括由训练矩阵的多列生成的多个训练导频，并且在增益矩阵的列中用多个增益元素进行了缩放。 发射机经由多个发射天线发送每个复合导频。 MISO接收器获得用于多个复合导频的接收符号，并导出复合MISO信道的估计。 对于OFDM，MISO接收机为每个复合导频导出初始脉冲响应估计，对所有复合导频进行初始脉冲响应估计，并得出复合MISO信道的频率响应估计。 MIMO接收机基于训练和增益矩阵获得并处理多个复合导频的接收符号，并导出多个发射天线与多个接收天线之间的各个SISO信道的信道估计。

公开(公告)号：US07940663B2

公开(公告)日：2011-05-10

申请号：US11182694

申请日：2005-07-15

申请人： Tamer Kadous

发明人： Tamer Kadous

IPC分类号： G01R31/08

CPC分类号： H04L1/1829 ,  H04L1/1635 ,  H04L2001/125

摘要： Systems and methodologies are described that facilitate mitigating effects of mismatch errors related to incorrectly decoded acknowledgments indicative of successfully decoded data packets in a wireless network environment. Misinterpretation of a cumulative acknowledgment related to a number of successfully decoded data packets can be identified, and data packet transmission mismatch errors caused thereby can be evaluated to determine an optimal manner in which to decode and acknowledge remaining data packets to alleviate mismatch and restore synchronization between a transmitter of the data packets and a receiver thereof.

摘要翻译： 描述了系统和方法，其有助于减轻与在无线网络环境中指示成功解码的数据分组的错误解码的确认相关的失配错误的影响。 可以识别与多个成功解码的数据分组相关的累积确认的误解，并且可以评估由此引起的数据分组传输失配错误，以确定解码和确认剩余数据分组以减轻失配并最终恢复之间的同步的最佳方式 数据分组的发射机及其接收机。

公开(公告)号：US20070133668A1

公开(公告)日：2007-06-14

申请号：US11560735

申请日：2006-11-16

申请人： Ayman Naguib ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tamer Kadous

发明人： Ayman Naguib ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tamer Kadous

IPC分类号： H04B17/00

CPC分类号： H04L27/2647 ,  H04L1/0631 ,  H04L25/022

摘要： Techniques to facilitate estimating the frequency response of a wireless channel in an OFDM system are provided. The method and systems allow for combining signal information across multiple communication channels at one or more channel tap delays in order to determine appropriate taps for channel information.

摘要翻译： 提供了有助于估计OFDM系统中的无线信道的频率响应的技术。 该方法和系统允许在一个或多个信道抽头延迟的情况下在多个通信信道上组合信号信息，以便确定用于信道信息的合适的抽头。

公开(公告)号：US20070070928A1

公开(公告)日：2007-03-29

申请号：US11507787

申请日：2006-08-21

申请人： Arak Sutivong ,  Avneesh Agrawal ,  Tamer Kadous

发明人： Arak Sutivong ,  Avneesh Agrawal ,  Tamer Kadous

IPC分类号： H04B7/00 ,  H04B3/10

CPC分类号： H04W52/325 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0632

摘要： Systems and methodologies are described that facilitate providing auxiliary multiple-input, multiple-output (MIMO) pilot signals to MIMO user devices in a wireless communication environment. According to some aspects, a portion of data transmission power may be reallocated for auxiliary MIMO pilot transmission during a data segment in a time slot, in order to permit a MIMO user device to perform CQI and rank prediction. Additionally or alternatively, non-MIMO pilot transmission power may be reallocated in a pilot segment in the time slot for transmission of an auxiliary MIMO pilot signal to permit the MIMO user device to demodulate data transmitted in data segments of the time slot. MIMO pilot signals may additionally be time-division multiplexed within or across time slots and may be transmitted over available Walsh codes in data and control segments.

摘要翻译： 描述了有助于在无线通信环境中向MIMO用户设备提供辅助多输入多输出（MIMO）导频信号的系统和方法。 根据一些方面，可以在时隙中的数据段期间重新分配一部分数据发送功率用于辅助MIMO导频传输，以便允许MIMO用户设备执行CQI和秩预测。 附加地或替代地，可以在时隙中的导频段中重新分配非MIMO导频传输功率，以传输辅助MIMO导频信号，以允许MIMO用户设备解调在该时隙的数据段中发送的数据。 MIMO导频信号可以另外在时隙内或跨时隙进行时分复用，并且可以在数据和控制段中通过可用的沃尔什码传输。