公开(公告)号：US20150188743A1

公开(公告)日：2015-07-02

申请号：US14581967

申请日：2014-12-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chang Wahn YU ,  Hee Soo LEE ,  Sok Kyu LEE

IPC: H04L27/26

CPC classification number: H04L27/2627 ,  H04B7/0671 ,  H04B7/084 ,  H04L25/0212 ,  H04L25/0224 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/2655

Abstract: A method and apparatus for estimating a channel in a wireless local area network (WLAN) are provided. A channel estimation apparatus may include a channel estimation information combiner to combine at least one channel estimation information based on a difference between cyclic delay diversity (CDD) values, and a phase applier to generate a first phase value and to apply the first phase value to the combined channel estimation information.

Abstract translation: 提供了一种用于估计无线局域网（WLAN）中的信道的方法和装置。 信道估计装置可以包括信道估计信息组合器，用于基于循环延迟分集（CDD）值之间的差和相位施加器组合至少一个信道估计信息以产生第一相位值并将第一相位值应用于 组合信道估计信息。

公开(公告)号：US09066249B2

公开(公告)日：2015-06-23

申请号：US13787684

申请日：2013-03-06

Applicant: Apple Inc.

Inventor： Seyed Reza Mir Ghaderi ,  Kee-Bong Song ,  Syed A. Mujtaba

IPC: H04W24/02 ,  H04L1/08 ,  H04L1/18 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04J11/00

CPC classification number: H04L5/0048 ,  H04B7/0671 ,  H04J11/0023 ,  H04J11/0053 ,  H04L1/0009 ,  H04L1/06 ,  H04L1/08 ,  H04L1/18 ,  H04L1/1812 ,  H04L5/0055 ,  H04W24/02 ,  H04W28/0236 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/444

Abstract: Methods and apparatus for interference coordination to improve transmission and reception performance within wireless networks. In one exemplary embodiment, a wireless transmitter transmits multiple transmissions over a determined time. The receiver receives the multiple transmissions and attempts to recover the transmitted signal. Because, the fading channel varies over time for each transmitter-receiver, by combining the received signals over multiple iterations, the signal of interest will be magnified, whereas interference effects will be suppressed.

Abstract translation: 用于干扰协调的方法和装置，以提高无线网络内的传输和接收性能。 在一个示例性实施例中，无线发射机在确定的时间内发射多个传输。 接收机接收多个传输并尝试恢复所发送的信号。 因为每个发射机 - 接收机的衰落信道随着时间的推移而变化，所以通过在多个迭代中组合接收到的信号，感兴趣的信号将被放大，而干扰效应被抑制。

公开(公告)号：US20150156047A1

公开(公告)日：2015-06-04

申请号：US14616482

申请日：2015-02-06

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Yutaka Murakami ,  Masayuki Orihashi ,  Akihiko Matsuoka

IPC: H04L27/26 ,  H04L5/00

CPC classification number: H04L25/0204 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0671 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/082 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/003 ,  H04L5/0048 ,  H04L25/0206 ,  H04L27/04 ,  H04L27/06 ,  H04L27/12 ,  H04L27/14 ,  H04L27/18 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/2627 ,  H04L27/2649 ,  H04L27/2657 ,  H04L27/2659 ,  H04L27/2691 ,  H04L27/2695 ,  H04L69/22 ,  H04W52/52 ,  H04W72/0453

Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

公开(公告)号：US20150124634A1

公开(公告)日：2015-05-07

申请号：US14505655

申请日：2014-10-03

Applicant: Magnolia Broadband Inc.

Inventor： Haim Harel ,  Phil F. Chen ,  Kenneth Kludt ,  Thorp Rivingston

IPC: H04B7/06 ,  H04W24/08 ,  H04L5/14

CPC classification number: H04B7/0671 ,  H04B7/04 ,  H04B17/12 ,  H04L5/14 ,  H04W24/08

Abstract: A system and method for compensating phase differences between multiple local oscillators and group delay differences between multiple transceivers. The system may include; an antenna array; a plurality of transceivers connected to said antennas and operatively associated each with a local oscillator (LO), wherein at least some of the transceivers do not share a common LO, and wherein at least some of the LOs are using a common reference oscillator; a common digital beamformer circuit connected to the transceivers; a baseband processor configured to operate the system at a specified communication scheme; and a calibration circuit and software modules configured to eliminate or reduce mismatches and phase deviations between the different transceivers, wherein the calibration circuit and software modules are incorporated in system such that the elimination or reduction of mismatches and phase deviations is non-interrupting with a continuous operation of the system at the specified communication scheme.

Abstract translation: 用于补偿多个本地振荡器之间的相位差和多个收发器之间的组延迟差异的系统和方法。 该系统可以包括 天线阵列 连接到所述天线的多个收发器并且可操作地与本地振荡器（LO）相关联，其中至少一些收发机不共享公共LO，并且其中至少一些LO正在使用公共参考振荡器; 连接到收发器的公共数字波束形成器电路; 基带处理器，被配置为以指定的通信方案来操作所述系统; 以及被配置为消除或减少不同收发器之间的错配和相位偏差的校准电路和软件模块，其中校准电路和软件模块并入系统中，使得消除或减少失配和相位偏差不间断地连续 在指定的通信方案下对系统的操作。

公开(公告)号：US09008115B2

公开(公告)日：2015-04-14

申请号：US14228692

申请日：2014-03-28

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Kenichi Miyoshi

IPC: H04J3/16 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04L1/18

CPC classification number: H04B7/0632 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0613 ,  H04B7/0667 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0697 ,  H04B7/0842 ,  H04L1/0006 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0618 ,  H04L1/1657 ,  H04L1/1812 ,  H04L1/1893

Abstract: Data streams stored in buffers are modulated by modulation sections. Multipliers multiply the signals output from the modulation sections by weights output from a weight control section. The signals output from the multipliers are added up by addition sections, subjected to radio transmission processing by transmission radio sections and sent through antennas. A buffer control section controls the buffers based on a retransmission count output from a retransmission count detection section. The weight control section outputs weights different from weights at the time of previous transmission to the multipliers every time data is retransmitted. This allows a diversity gain at the time of data retransmission to be increased even if a time variation of the propagation path environment for radio signals is slow.

Abstract translation: 存储在缓冲器中的数据流由调制部分调制。 乘数将从调制部分输出的信号乘以重量控制部分的重量输出。 从乘法器输出的信号由加法部分相加，经过无线电传送部分的无线电传输处理并通过天线发送。 缓冲器控制部分基于从重传计数检测部分输出的重传计数来控制缓冲器。 每当重发数据时，权重控制部分将与先前发送时的权重不同的权重输出到乘法器。 即使无线电信号的传播路径环境的时间变化较慢，也能够提高数据重发时的分集增益。

公开(公告)号：US09008013B2

公开(公告)日：2015-04-14

申请号：US13342654

申请日：2012-01-03

Applicant: Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Jianglei Ma ,  Wen Tong

Inventor： Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Jianglei Ma ,  Wen Tong

IPC: H04W4/00 ,  H04B7/00 ,  H04W48/08 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04B7/0478 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0691 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/005 ,  H04L5/006 ,  H04L5/023 ,  H04L27/2601 ,  H04W48/08 ,  H04W72/042 ,  H04W72/044 ,  H04W72/08 ,  H04W74/06

Abstract: Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented.

Abstract translation: 本发明的方面提供了附加的MAC功能来支持无线通信系统框架的PHY特征。 附加的MAC功能有助于实现从无线终端到基站的反馈。 在本发明的一些方面，在分配的反馈信道上提供反馈。 在本发明的其它方面，反馈由报头，小标题或子报头中的MAC协议数据单元（PDU）提供。 反馈可以由无线终端自主地从无线终端发送到基站，或者响应于来自基站的指示，请求反馈。 本发明的各方面还提供分配反馈资源以形成专用反馈信道。 这些增强中的一个或多个包括在给定的实现中。 还描述了基站和无线终端，其中可以实现本文描述的方法。

公开(公告)号：US09001811B2

公开(公告)日：2015-04-07

申请号：US12468122

申请日：2009-05-19

Applicant: Philip M. Wala ,  Dean Zavadsky

Inventor： Philip M. Wala ,  Dean Zavadsky

IPC: H04B7/14 ,  H04B7/216 ,  H04W4/00 ,  H04B1/707 ,  H04B7/06 ,  H04W16/26 ,  H04W88/08

CPC classification number: H04B1/707 ,  H04B7/0671 ,  H04B2201/70701 ,  H04W16/26 ,  H04W88/085

Abstract: A communication system to feed remote antenna nodes with simulcast traffic and non-simulcast beacons is provided. The communication system includes a host radio frequency (RF) digitizer, a delay buffer, a summing circuit, and a framer/serializer. The host RF digitizer receives CDMA base station signals for simulcast CDMA-traffic-bearing channels and to output digital samples. The delay buffer is communicatively coupled to receive the samples output from a beacon pilot generator and to output digitally delayed CDMA-digital-beacon-pilot samples having different pseudo-noise offsets. The summing circuit adds the CDMA-digital-beacon-pilot samples having different pseudo-noise offsets to the digital samples received from the host RF digitizer to form composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples. The framer/serializer is communicatively coupled to receive the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples, and to route the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples to an associated remote antenna node.

Abstract translation: 提供了一种用于馈送具有联播流量和非联播信标的远程天线节点的通信系统。 通信系统包括主机射频（RF）数字转换器，延迟缓冲器，加法电路和成帧器/串行器。 主机RF数字化器接收CDMA基站信号用于联播CDMA业务承载信道并输出数字采样。 延迟缓冲器被通信地耦合以接收从信标导频发生器输出的采样并输出具有不同伪噪声偏移的数字延迟的CDMA数字信标 - 导频样本。 求和电路将具有不同伪噪声偏移的CDMA数字信标导频样本添加到从主RF数字转换器接收的数字样本，以形成复合同播广 - 唯一偏移信标 - 导频CDMA样本。 成帧器/串行器通信地耦合以接收复合联播 - 唯一偏移信标 - 导频CDMA样本，并且将复合联播加唯一偏移信标导频CDMA样本路由到相关联的远程天线节点。

公开(公告)号：US08942648B2

公开(公告)日：2015-01-27

申请号：US13143071

申请日：2009-12-24

Applicant: Jian-Jun Li ,  Jae-Hyun Ahn ,  Jun-Seong Park

Inventor： Jian-Jun Li ,  Jae-Hyun Ahn ,  Jun-Seong Park

IPC: H04B7/02 ,  H04B7/06 ,  H04L1/06 ,  H04L1/08 ,  H04W28/04 ,  H04W88/08

CPC classification number: H04B7/0689 ,  H04B7/024 ,  H04B7/0671 ,  H04L1/0625 ,  H04L1/0668 ,  H04L1/08 ,  H04W28/04 ,  H04W88/08

Abstract: The present invention relates to a data transmission method in a radio communication system, comprising the steps of selecting a first reference transmission antenna of a first base station and a second reference transmission antenna of a second base station from among a plurality of base stations, transmitting a first transmission data stream via the first reference transmission antenna, transmitting a second transmission data stream via the second reference transmission antenna to a terminal, time-delaying the first transmission data stream and retransmitting the delayed first transmission data stream to the terminal via a transmission antenna of a first transmission group, and time-delaying the second transmission data stream and retransmitting the delayed second transmission data stream to the terminal via a transmission antenna of a second transmission group. Thus, co-channel interferences can be minimized, and the efficiency in using an antenna and the receiving performance thereof in a radio communication system adopting a multi-antenna technique and a multi-base station system can be improved at the same time.

Abstract translation: 本发明涉及一种无线通信系统中的数据传输方法，包括以下步骤：从多个基站中选择第一基站的第一参考发射天线和第二基站的第二参考发射天线，发射 经由第一参考发射天线的第一传输数据流，经由第二参考发射天线向终端发送第二传输数据流，对第一传输数据流进行时间延迟，并经由传输向终端重发延迟的第一传输数据流 天线，并且延迟第二传输数据流，并且经由第二传输组的传输天线将延迟的第二传输数据流重传到终端。 因此，可以使同频道干扰最小化，并且可以同时提高采用多天线技术和多基站系统的无线通信系统中使用天线的效率及其接收性能。

公开(公告)号：US08913673B2

公开(公告)日：2014-12-16

申请号：US13003997

申请日：2009-07-03

Applicant: Bo Dai ,  Shuqiang Xia ,  Chunli Liang ,  Peng Hao ,  Guanghui Yu

Inventor： Bo Dai ,  Shuqiang Xia ,  Chunli Liang ,  Peng Hao ,  Guanghui Yu

IPC: H04K1/00 ,  H04B7/06

CPC classification number: H04B7/063 ,  H04B7/0671

Abstract: The present invention discloses a method and apparatus for transmitting rank indication information, in which the method comprises: when rank indication information and a sounding reference signal are transmitted in a same sub-frame, loading the sounding reference signal to a last symbol of a sub-frame, and transmitting the rank indication information and the sounding reference signal. The present invention prevents destruction of orthogonality of codes between PUCCH channels when the rank indication information and the sounding reference signal are transmitted in the same sub-frame, thus the overall performance of the system can be ensured.

Abstract translation: 本发明公开了一种用于发送秩指示信息的方法和装置，其中该方法包括：当在相同的子帧中发送秩指示信息和探测参考信号时，将探测参考信号加载到子的最后一个符号 帧，并发送秩指示信息和探测参考信号。 本发明在同一子帧中发送秩指示信息和探测参考信号时，可以防止PUCCH信道之间的代码的正交性破坏，从而可以保证系统的整体性能。

公开(公告)号：US08909174B2

公开(公告)日：2014-12-09

申请号：US12533765

申请日：2009-07-31

Applicant: Steven J. Howard ,  Jay Rodney Walton ,  Mark S. Wallace

Inventor： Steven J. Howard ,  Jay Rodney Walton ,  Mark S. Wallace

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/04

CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0671

Abstract: A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols may be sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response matrix for that subband and perform receiver spatial processing for the subband with the spatial filter matrix.

Abstract translation: 发送实体对具有本征模式矩阵，导向矩阵或单位矩阵的每个子带的数据符号执行空间处理，以获得子带的空间处理符号。 数据符号可以在具有本征模式矩阵的正交空间信道上，在具有导引矩阵的不同空间信道上，或者从具有单位矩阵的不同发射天线发送。 在从多个发射天线的发射之前，发射实体在频域或时域中进一步对空间处理的符号执行波束成形。 接收实体执行补充处理以恢复由发送实体发送的数据符号。 接收实体可以基于该子带的MIMO信道响应矩阵为每个子带导出空间滤波器矩阵，并且对于具有空间滤波器矩阵的子带执行接收机空间处理。