公开(公告)号：US09136974B2

公开(公告)日：2015-09-15

申请号：US11401979

申请日：2006-04-10

申请人： Alexei Gorokhov ,  Dhananjay Ashok Gore ,  Gwendolyn D. Barriac ,  Jibing Wang ,  Tamer Kadous

发明人： Alexei Gorokhov ,  Dhananjay Ashok Gore ,  Gwendolyn D. Barriac ,  Jibing Wang ,  Tamer Kadous

IPC分类号： H04W72/00 ,  H04L1/00 ,  H04W72/04 ,  H04B7/04 ,  H04B7/06 ,  H04L1/06

CPC分类号： H04L1/0001 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0639 ,  H04B7/0663 ,  H04B7/0689 ,  H04L1/06 ,  H04W72/04

摘要： Embodiments are described in connection with enhancing performance in a wireless communication system using codebook technology. According to an embodiment is a method for enhancing performance in a wireless communication environment. The method can include receiving a user preference for a transmission mode, associating the user preference with an entry or entries in a codebook, and assigning the user to a transmission mode corresponding to the entry or entries. The transmission mode can be one of a precoding, space division multiple access (SDMA), SDMA precoding, multiple input multiple output (MIMO), MIMO precoding, MIMO-SDMA and a diversity. Each entry can correspond to a transmission mode.

摘要翻译： 结合增强使用码本技术的无线通信系统中的性能来描述实施例。 根据实施例是用于增强无线通信环境中的性能的方法。 该方法可以包括接收用户对传输模式的偏好，将用户偏好与码本中的条目或条目相关联，并将用户分配给与条目或条目相对应的传输模式。 传输模式可以是预编码，空分多址（SDMA），SDMA预编码，多输入多输出（MIMO），MIMO预编码，MIMO-SDMA和分集之一。 每个条目可以对应于传输模式。

公开(公告)号：US08971461B2

公开(公告)日：2015-03-03

申请号：US11441652

申请日：2006-05-25

申请人： Hemanth Sampath ,  Tamer Kadous

发明人： Hemanth Sampath ,  Tamer Kadous

IPC分类号： H04L1/00 ,  H04B7/12 ,  H04B1/10 ,  H04B7/04 ,  H04B7/06 ,  H04L1/06 ,  H04L25/03

CPC分类号： H04B7/12 ,  H04B1/1027 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/0656 ,  H04L1/0675 ,  H04L25/03242 ,  H04L2025/03426

摘要： Systems and methodologies are described that facilitate integrating a list-sphere decoding design in a multiple input-multiple output (MIMO wireless communication environment. According to various aspects, optimal rank selection and CQI computation for an optimal rank can be performed in conjunction with a non-linear receiver, such as a maximum life (ML) MMSE receiver, a non-linear receiver with a list-sphere decoder, and the like. Optimal rank selection can be performed using a maximum rank selection protocol, a channel capacity-based protocol, or any other suitable protocol that facilitates rank selection, and CQI information can be generated based in part on effective SNRs determined with regard to a selected optimal rank.

摘要翻译： 描述了有助于将多个输入多输出（MIMO无线通信环境）中的列表球体解码设计进行集成的系统和方法，根据各个方面，最佳秩选择和最佳秩的CQI计算可以结合非 - 线性接收机，例如最大寿命（ML）MMSE接收机，具有列表球体解码器的非线性接收机等。最佳秩选择可以使用最大秩选择协议，基于信道容量的协议 或有助于等级选择的任何其它合适的协议，并且可以部分地基于针对所选择的最优等级确定的有效SNR来生成CQI信息。

公开(公告)号：US08842693B2

公开(公告)日：2014-09-23

申请号：US11441742

申请日：2006-05-25

申请人： Avneesh Agrawal ,  Aamod Khandekar ,  Hemanth Sampath ,  Tamer Kadous

发明人： Avneesh Agrawal ,  Aamod Khandekar ,  Hemanth Sampath ,  Tamer Kadous

IPC分类号： H04J3/22 ,  H04J13/00

CPC分类号： H04B7/0697 ,  H04L1/0001 ,  H04L1/0006 ,  H04L1/0026 ,  H04L1/1812 ,  H04L1/1893

摘要： Systems and methodologies are described that facilitate reducing rank (e.g., of a user device) as a number of transmissions there from increases. Such rank step-down can improve interference resistance and facilitate maintaining code rate despite transmission propagation. Additionally, rank step-down information can be encoded along with CQI information to generate a 5-bit CQI signal that can facilitate updating a user's rank upon each CQI transmission (e.g., approximately every 5 ms). The described systems and/or methods can be employed in a single code word (SCW) wireless communication environment with a hybrid automatic request (HARQ) protocol.

摘要翻译： 描述的系统和方法被简化为有助于减少等级（例如，用户设备），因为其中的传输数量增加。 这种排序降低可以改善抗干扰性，并且有助于保持代码率，尽管传输传播。 此外，等级降级信息可以与CQI信息一起编码，以产生可以有助于在每次CQI传输（例如，大约每5ms）更新用户的等级的5比特CQI信号。 所描述的系统和/或方法可以用于具有混合自动请求（HARQ）协议的单个码字（SCW）无线通信环境中。

公开(公告)号：US08760994B2

公开(公告)日：2014-06-24

申请号：US11553462

申请日：2006-10-26

申请人： Jibing Wang ,  Tamer Kadous

发明人： Jibing Wang ,  Tamer Kadous

IPC分类号： H04J11/00

CPC分类号： H04B7/0447 ,  H04B7/0417 ,  H04B7/0482 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0639 ,  H04L1/06 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/023 ,  H04L25/0204 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Systems and methodologies are described that facilitate constructing unitary matrices that may be utilized in linear precoding for multiple-input multiple-output (MIMO) wireless communication systems. Each unitary matrix may be generated by combining (e.g., multiplying) a diagonal matrix with a Discrete Fourier Transform (DFT) matrix. The unitary matrices may be utilized to provide feedback related to a channel and/or control transmission over a channel based upon obtained feedback.

公开(公告)号：US08639190B2

公开(公告)日：2014-01-28

申请号：US11553870

申请日：2006-10-27

申请人： Dhananjay Ashok Gore ,  Hemanth Sampath ,  Jibing Wang ,  Tamer Kadous ,  Gwendolyn D. Barriac

发明人： Dhananjay Ashok Gore ,  Hemanth Sampath ,  Jibing Wang ,  Tamer Kadous ,  Gwendolyn D. Barriac

IPC分类号： H04B1/00

CPC分类号： H04B7/0456 ,  H04L1/0016 ,  H04L1/0026 ,  H04L1/0675 ,  H04L5/023 ,  H04L25/0206 ,  H04L27/2602 ,  H04L27/2608

摘要： Techniques to enhance the performance in a wireless communication system using segments called subbands and using precoding are shown. According to one aspect, the bandwidth for transmission to an access terminal is constrained to a preferred bandwidth which is less than the bandwidth available for transmission to an access terminal and precoding information related to the subcarriers within the constrained bandwidth is provided to a transmitter. The precoding information related to the subcarriers within a constrained bandwidth provides feedback about the forward link channel properties relative to different subbands and may be fed back on a channel associated with the bandwidth.

摘要翻译： 示出了使用称为子带并使用预编码的段来增强在无线通信系统中的性能的技术。 根据一个方面，用于传输到接入终端的带宽被限制到比可用于传输到接入终端的带宽的优选带宽，并且将与受限带宽内的子载波相关的预编码信息提供给发射机。 与受限带宽内的子载波相关的预编码信息提供关于相对于不同子带的前向链路信道属性的反馈，并且可以在与带宽相关联的信道上反馈。

公开(公告)号：US20100067480A1

公开(公告)日：2010-03-18

申请号：US12545693

申请日：2009-08-21

申请人： Jibing Wang ,  Rashid Ahmed Akbar Attar ,  Tamer Kadous ,  Jing Sun

发明人： Jibing Wang ,  Rashid Ahmed Akbar Attar ,  Tamer Kadous ,  Jing Sun

IPC分类号： H04W72/04 ,  H04J1/00

CPC分类号： H04B7/0413 ,  H04L5/0007 ,  H04L5/0048

摘要： A system has multiple antennas, a Time Division Multiplexing (TDM) module creating TDM slots, and demultiplexing circuitry inserting within the TDM slots Orthogonal Frequency Division Multiplexing (OFDM) symbols and associating the TDM slots with data sub-streams. The system also includes precoding circuitry associating the data sub-streams with multiple tones. Each of the respective tones corresponds to a respective one of the antennas. The antennas transmit the data sub-streams using the multiple tones.

摘要翻译： 系统具有多个天线，创建TDM时隙的时分复用（TDM）模块，以及在TDM时隙正交频分复用（OFDM）符号内插入多路复用电路，并将TDM时隙与数据子流相关联。 该系统还包括将数据子流与多个音调相关联的预编码电路。 各个音调中的每一个对应于相应的一个天线。 天线使用多个音调发送数据子流。

公开(公告)号：US07668125B2

公开(公告)日：2010-02-23

申请号：US10785292

申请日：2004-02-23

申请人： Tamer Kadous

发明人： Tamer Kadous

IPC分类号： H04B7/00

CPC分类号： H04L1/1819 ,  H04B7/0417 ,  H04L1/0002 ,  H04L1/0025 ,  H04L1/06 ,  H04L25/0328 ,  H04L27/2601 ,  H04W52/286 ,  Y02D50/10

摘要： For incremental redundancy transmission on multiple parallel channels in a MIMO system, a transmitter processes (e.g., encodes, partitions, interleaves, and modulates) each data packet for each parallel channel based on a rate selected for the parallel channel and obtains multiple symbol blocks for the packet. For each data packet, the transmitter transmits one symbol block at a time on its parallel channel until a receiver recovers the packet or all blocks have been transmitted. The receiver performs detection and obtains symbol blocks transmitted on the parallel channels. The receiver recovers the data packets transmitted on the parallel channels independently or in a designated order. The receiver processes (e.g., demodulates, deinterleaves, re-assembles, and decodes) all symbol blocks obtained for each data packet and provides a decoded packet. The receiver may estimate and cancel interference due to recovered data packets so that data packets recovered later can achieve higher SINRs.

摘要翻译： 对于MIMO系统中的多个并行信道上的增量冗余传输，发射机基于为并行信道选择的速率对每个并行信道的每个数据分组进行处理（例如，编码，分割，交织和调制），并获得多个符号块 包。 对于每个数据分组，发射机在其并行信道上一次发送一个符号块，直到接收机恢复分组或已经发送所有块。 接收机执行检测并获得在并行信道上发送的符号块。 接收机独立地或以指定的顺序恢复在并行信道上传输的数据包。 接收机处理（例如，解调，解交织，重新组合和解码）为每个数据分组获得的所有符号块，并提供解码的分组。 接收机可以估计和消除由于恢复的数据分组引起的干扰，使得稍后恢复的数据分组可以实现更高的SINR。

公开(公告)号：US20100003931A1

公开(公告)日：2010-01-07

申请号：US12558073

申请日：2009-09-11

申请人： Ranganathan Krishnan ,  Anand D. Subramaniam ,  Tamer Kadous

发明人： Ranganathan Krishnan ,  Anand D. Subramaniam ,  Tamer Kadous

IPC分类号： H04B7/02

CPC分类号： H04W52/42 ,  H04B7/0667 ,  H04L5/0023 ,  H04L5/0048

摘要： Pilot and data transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation are provided. Subband multiplexing is used to avoid interference resulting from transmitting multiple signals simultaneously from multiple antennas. M usable subbands are initially arranged to form multiple groups of subbands, with each group including a different subset of the usable subbands. Each of T transmit antennas is then assigned one or possibly more subband groups for pilot transmission and typically one subband group for data transmission. Pilot and data may then be transmitted from each antenna on the subbands assigned to that antenna for pilot and data transmission. For each transmit antenna, the transmit power for each assigned subband may be scaled higher such that all of the total transmit power available for the antenna is used for transmission. Pilot and/or data may be transmitted simultaneously from all T antennas on all usable subbands without causing mutual interference.

摘要翻译： 提供了利用多载波调制的多天线通信系统的导频和数据传输方案。 使用子带复用来避免从多个天线同时发送多个信号导致的干扰。 M个可用的子带最初被布置成形成多个子带组，每组包括可用子带的不同子集。 每个T发射天线然后被分配一个或可能更多的子带组用于导频传输，并且通常用于一个子带组用于数据传输。 然后可以从分配给该天线的子带上的每个天线发送导频和数据用于导频和数据传输。 对于每个发射天线，每个分配的子带的发射功率可以被缩放更高，使得可用于天线的全部发射功率被用于传输。 导频和/或数据可以在所有可用子带上从所有T个天线同时传输而不引起相互干扰。

公开(公告)号：US07477693B2

公开(公告)日：2009-01-13

申请号：US11749523

申请日：2007-05-16

申请人： Anand Subramaniam ,  Tamer Kadous

发明人： Anand Subramaniam ,  Tamer Kadous

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/0242 ,  H04L25/0208 ,  H04L27/2601

摘要： Techniques to derive a channel estimate using substantially fewer number of complex multiplications than with a brute-force method to derive the same channel estimate. In one method, an intermediate vector B is initially derived based on K sub-vectors of a vector Ĥ for a channel frequency response estimate and at least two DFT sub-matrices for a DFT matrix {tilde over (W)}, where K>1. An intermediate matrix A for the DFT matrix {tilde over (W)} is also obtained. A least square channel impulse response estimate is then derived based on the intermediate vector B and the intermediate matrix A. In one implementation, the intermediate vector B is obtained by first computing DFTs of a matrix ĤT×L, which is formed based on the vector Ĥ, to provide a matrix GL×L. Inner products between the columns of a base DFT sub-matrix W1 and the rows of the matrix GL×L are then computed to obtain the entries of the intermediate vector B.

摘要翻译： 使用大量更少数量的复数乘法来获得信道估计的技术，而不是用蛮力方法来导出相同的信道估计。 在一种方法中，基于用于信道频率响应估计的向量H的K个子向量和用于DFT矩阵的至少两个DFT子矩阵（波形）（W）}，最初导出中间向量B，其中K> 1。 还获得了用于DFT矩阵{波前（W）}的中间矩阵A. 然后基于中间向量B和中间矩阵A导出最小二乘信道脉冲响应估计。在一个实现中，通过首先计算基于向量H形成的矩阵HTxL的DFT来获得中间向量B， 以提供矩阵GLxL。 然后计算基本DFT子矩阵W1的列与矩阵GLxL的行之间的内积，以获得中间向量B的条目。

公开(公告)号：US07418046B2

公开(公告)日：2008-08-26

申请号：US11022146

申请日：2004-12-22

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

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

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/0204 ,  H04L25/0212 ,  H04L25/0226 ,  H04L27/261

摘要： Each transmitter is assigned a time-only pilot code, a frequency-only pilot code, or a time-frequency pilot code to use for pilot transmission. The pilot codes may be pseudo-random, orthogonal, and/or cyclic-shift codes. To obtain a channel estimate for a transmitter using a time-frequency pilot code composed of a time-only code and a frequency-only code, a receiver multiplies a set of received symbols for each symbol period with a set of code values for the frequency-only code to obtain a set of detected symbols and performs an IDFT on the set of detected symbols to obtain an initial impulse response estimate. The receiver performs code matching on multiple initial impulse response estimates derived for multiple symbol periods with the time-only code to obtain a final impulse response estimate for the desired transmitter. The receiver retains the first L channel taps and zeroes out remaining channel taps, where L is the expected channel length.

摘要翻译： 为每个发射机分配一个仅时间导频码，仅频率导频码或用于导频传输的时频导频码。 导频码可以是伪随机，正交和/或循环移位码。 为了使用由时间唯一码和仅频率码构成的时频导频码来获得用于发射机的信道估计，接收机将用于每个符号周期的一组接收符号与频率的一组码值相乘 - 获得一组检测符号的代码，并对检测符号集合执行IDFT以获得初始脉冲响应估计。 接收机对具有多个符号周期的多个初始脉冲响应估计执行码匹配，其中仅使用时间码来获得所需发射机的最终脉冲响应估计。 接收器保留第一个L个通道抽头，并将剩余的通道抽头置零，其中L是预期的通道长度。