公开(公告)号：US20140010324A1

公开(公告)日：2014-01-09

申请号：US13730993

申请日：2012-12-29

申请人： Thomas J. Kenney ,  Eldad Perahia ,  Shahrnaz Azizi

发明人： Thomas J. Kenney ,  Eldad Perahia ,  Shahrnaz Azizi

IPC分类号： H04L27/22

CPC分类号： H04L27/22 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/0094 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2694 ,  H04L27/2695 ,  H04L2025/0377 ,  H04L2027/0026 ,  H04L2027/0095

摘要： Pilot logic may determine based upon channel and phase information how to process pilot tones that shift locations every N symbols in an orthogonal frequency division multiplexing (OFDM) packet transmission. Pilot logic may determine a signal-to-noise ratio (SNR) for the channel to determine how to process the shifting pilot tones. Pilot logic may also determine channel and phase information updates such as channel state information and phase correction information from pilot tones. In situations of high SNR, logic may use channel estimates and phase rotations that are obtained from locations of the pilot tones for phase tracking and updating the equalizer. In situations of low SNR, logic may use the phase rotations for phase tracking and not update the equalizer during the OFDM transmission. Logic may also determine the presence or absence of a Doppler effect on the transmission and transmit a selection for N to an access point in response.

摘要翻译： 导频逻辑可以基于信道和相位信息来确定如何处理在正交频分复用（OFDM）分组传输中每N个符号移位位置的导频音调。 导频逻辑可以确定信道的信噪比（SNR）以确定如何处理移位导频音。 导频逻辑还可以确定信道和相位信息更新，例如来自导频音调的信道状态信息和相位校正信息。 在高SNR的情况下，逻辑可以使用从用于相位跟踪和更新均衡器的导频音调的位置获得的信道估计和相位旋转。 在低SNR的情况下，逻辑可以使用相位旋转进行相位跟踪，并且在OFDM传输期间不更新均衡器。 逻辑还可以确定对传输的多普勒效应的存在或不存在，并且响应地向接入点发送N的选择。

公开(公告)号：US08594632B1

公开(公告)日：2013-11-26

申请号：US13711398

申请日：2012-12-11

申请人： Shahrnaz Azizi ,  Adrian P Stephens ,  Thomas J. Kenney ,  Eldad Perahia ,  Emily H. Qi ,  Minyoung Park

发明人： Shahrnaz Azizi ,  Adrian P Stephens ,  Thomas J. Kenney ,  Eldad Perahia ,  Emily H. Qi ,  Minyoung Park

IPC分类号： H04W4/02

CPC分类号： H04W12/06 ,  H04W8/005 ,  H04W76/14 ,  H04W88/06

摘要： Embodiments of device-to-device (D2D) discovery, authentication, and connection techniques are generally described herein. In an example, a device-to-device connection establishment technique may be performed directly between peer-to-peer wireless communication devices without obtaining authentication information from a cloud network or an external service. The device-to-device connection establishment technique may include a transmission of a discovery request to available devices, a transmission of a response from available devices including authentication data, and a verification of the authentication data. The authentication data may include previously stored image data associated with a device or human user associated with a device. In further examples, image processing and image recognition techniques may be used to verify a particular device or human user associated with a device.

摘要翻译： 本文通常描述设备到设备（D2D）发现，认证和连接技术的实施例。 在一个示例中，可以在对等无线通信设备之间直接执行设备到设备连接建立技术，而不从云网络或外部服务获取认证信息。 设备到设备连接建立技术可以包括向可用设备发送发现请求，从包括认证数据的可用设备的响应的传输和认证数据的验证。 认证数据可以包括与与设备相关联的设备或人类用户相关联的先前存储的图像数据。 在另外的示例中，可以使用图像处理和图像识别技术来验证与设备相关联的特定设备或人类用户。

公开(公告)号：US20170005846A1

公开(公告)日：2017-01-05

申请号：US14975190

申请日：2015-12-18

申请人： Ahmed Gamal Helmy Mohamed ,  Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

发明人： Ahmed Gamal Helmy Mohamed ,  Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

IPC分类号： H04L27/26 ,  H04B7/06 ,  H04B7/04

CPC分类号： H04L27/2627 ,  H04B7/0413 ,  H04B7/0697 ,  H04L27/2602 ,  H04W84/12

摘要： A transmitter for spatial modulation in a high-efficiency wireless local-area network is disclosed. An apparatus is disclosed that comprises memory and circuitry coupled to the memory. The processing circuitry configured to split a data bitstream between an antenna bitstream and a symbol bitstream, encode the data bitstream into a plurality of orthogonal frequency-division multiplexing (OFDM) symbols from a signal constellation, encode the antenna bitstream into a plurality of antenna indices from a space constellation, map symbols of the plurality of symbols to a plurality of subcarriers of a channel and associate the symbols with an index of the plurality of indices. The processing circuitry may be configured to configure the access point for transmission of the symbols on the channel in accordance with an associated one of the antenna indices.

摘要翻译： 公开了一种用于高效率无线局域网中空间调制的发射机。 公开了一种包括耦合到存储器的存储器和电路的装置。 处理电路被配置为在天线比特流和符号比特流之间分割数据比特流，将数据比特流编码为来自信号星座的多个正交频分复用（OFDM）符号，将天线比特流编码为多个天线索引 从空间星座，将多个符号的符号映射到信道的多个子载波，并将符号与多个索引的索引相关联。 处理电路可以被配置为根据相关联的一个天线索引来配置用于在信道上传输符号的接入点。

公开(公告)号：US20160242173A1

公开(公告)日：2016-08-18

申请号：US15023262

申请日：2014-09-17

申请人： Guoqing C. LI ,  Shahrnaz AZIZI ,  Thomas J. KENNEY ,  Eldad PERAHIA ,  Robert J. STACEY

发明人： Guoqing C. Li ,  Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia ,  Robert J. Stacey

IPC分类号： H04W72/04 ,  H04L27/26 ,  H04L5/00 ,  H04B7/04

CPC分类号： H04W72/0433 ,  H04B7/0452 ,  H04L5/0023 ,  H04L5/003 ,  H04L5/0094 ,  H04L27/2602 ,  H04W72/0453 ,  H04W84/12 ,  Y02D70/10

摘要： Embodiments of master station and method for high-efficiency WLAN (HEW) communication are generally described herein. In some embodiments, the master station is configured for HEW communication in accordance with an IEEE 802.11ax technique. The master station may transmit an indication to one or more of a plurality of HEW stations to indicate which one of a plurality of 20 MHz channels to monitor for a HEW signal field. The master station may configure the HEW signal field to indicate which of a plurality of subchannels of the indicated 20 MHz channel is allocated to the HEW stations for communication. The master station may transmit the configured HEW signal field in the indicated one of the 20 MHz channels and may communicate with the HEW stations on the indicated subchannels in accordance with an orthogonal-frequency divisional multiple access (OFDMA) technique.

摘要翻译： 这里一般地描述用于高效率WLAN（HEW）通信的主站和方法的实施例。 在一些实施例中，主站被配置用于根据IEEE 802.11ax技术的HEW通信。 主站可以向多个HEW站中的一个或多个HTS站发送指示，以指示监视HEW信号域的多个20MHz信道中的哪一个。 主站可以配置HEW信号字段以指示所指示的20MHz信道的多个子信道中的哪一个子信道被分配给HEW站进行通信。 主站可以在所指示的20MHz信道中发送配置的HEW信号字段，并且可以根据正交频分多址（OFDMA）技术与所指示的子信道上的HEW站进行通信。

公开(公告)号：US20150124843A1

公开(公告)日：2015-05-07

申请号：US14127284

申请日：2013-11-04

申请人： Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

发明人： Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

IPC分类号： H04L7/00 ,  H04L7/04

CPC分类号： H04L7/0016 ,  H04L7/04 ,  H04L7/041 ,  H04L27/2613 ,  H04L27/2657 ,  H04W56/0035

摘要： The disclosure generally relates to a shortened training field preamble structure for high-efficiency Wi-Fi environments. In one embodiment, the disclosure relates to a communication system having a transmitter transmitting a Master-Sync packet received by stationary and mobile receivers. The Master-Sync packet contains information for communicating in a HEW environment. Upon receipt each receiver decodes the Master-Sync packet to (i) estimate a frequency offset and/or an automatic gain control (AGC) setting; (ii) select a transmission frequency consistent with the frequency offset; and/or (iii) determine a new transmission power consistent with the AGC; (iv) tune to a new frequency offset and gain control setting to receive subsequent packets from the transmitter.

摘要翻译： 本公开一般涉及用于高效Wi-Fi环境的缩短的训练场前同步码结构。 在一个实施例中，本公开涉及一种具有发射机的通信系统，所述发射机发送由固定和移动接收机接收的主同步分组。 主同步数据包包含用于在HEW环境中通信的信息。 在接收到每个接收器时，解码主同步分组以（i）估计频偏和/或自动增益控制（AGC）设置; （ii）选择与频率偏移一致的传输频率; 和/或（iii）确定与AGC一致的新传输功率; （iv）调谐到新的频率偏移和增益控制设置以接收来自发射机的后续分组。

公开(公告)号：US20140321564A1

公开(公告)日：2014-10-30

申请号：US14325936

申请日：2014-07-08

申请人： Thomas J. Kenney ,  Eldad Perahia ,  Shahrnaz Azizi

发明人： Thomas J. Kenney ,  Eldad Perahia ,  Shahrnaz Azizi

IPC分类号： H04L27/26 ,  H04L5/00

CPC分类号： H04L27/2626 ,  H04L1/0002 ,  H04L1/0009 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0048 ,  H04L5/005 ,  H04L25/0224 ,  H04L25/0228 ,  H04L25/025 ,  H04L25/03019 ,  H04L2025/03617 ,  H04W72/04 ,  H04W72/0453 ,  H04W84/12

摘要： Techniques to manage dwell times for pilot rotation are described. An apparatus may comprise a memory configured to store a data structure with a set of modulation and coding schemes (MCS) available to an orthogonal frequency division multiplexing (OFDM) system, each MCS having an associated pilot dwell time. The apparatus may further comprise a processor circuit coupled to the memory, the processor circuit configured to identify a MCS to communicate a packet using multiple subcarriers of the OFDM system, and retrieve a pilot dwell time associated with the MCS from the memory, the pilot dwell time to indicate when to shift a pilot tone between subcarriers of the multiple subcarriers during communication of the packet. Other embodiments are described and claimed.

摘要翻译： 描述了管理驾驶员旋转停留时间的技术。 装置可以包括被配置为利用可用于正交频分复用（OFDM）系统的一组调制和编码方案（MCS））来存储数据结构的存储器，每个MCS具有相关的导频停留时间。 该装置还可以包括耦合到存储器的处理器电路，处理器电路被配置为识别MCS以使用OFDM系统的多个子载波来传送分组，并且从存储器检索与MCS相关联的导频停留时间，导频驻留 指示何时在分组的通信期间在多个子载波的子载波之间移动导频音。 描述和要求保护其他实施例。

公开(公告)号：US20140192820A1

公开(公告)日：2014-07-10

申请号：US13931918

申请日：2013-06-29

申请人： Shahrnaz Azizi ,  Adrian P. Stephens ,  Thomas J. Kenney ,  Eldad Perahia ,  Minyoung Park

发明人： Shahrnaz Azizi ,  Adrian P. Stephens ,  Thomas J. Kenney ,  Eldad Perahia ,  Minyoung Park

IPC分类号： H04W28/04 ,  H04W74/08

CPC分类号： H04W72/04 ,  C12N15/74 ,  H04W74/0816 ,  H04W84/18

摘要： Logic for collision mitigation between transmissions of wireless transmitters and receivers operating at different bandwidths. Logic of the receivers may be capable of receiving and detecting signals transmitted at narrower bandwidths. In several embodiments, the receivers comprise a clear channel assessment logic that implements a guard interval (or cyclic prefix) detector to detect transmissions at narrower bandwidths. For instance, a two MegaHertz (MHz) bandwidth receiver may implement a guard interval detector to detect 1 MHz bandwidth signals and a 16M Hz bandwidth receiver may implement logic to detect one or more 1 MHz bandwidth signals and any other combination of, e.g., 1, 2, 4, 8 MHz bandwidth signals. In many embodiments, the guard interval detector may be implemented to detect guard intervals on a channel designated as a primary channel as well as on one or more non-primary channels.

摘要翻译： 用于在不同带宽下工作的无线发射机和接收机的传输之间的冲突缓解的逻辑。 接收机的逻辑可能能够接收和检测在较窄带宽上传输的信号。 在几个实施例中，接收机包括清除信道评估逻辑，其实现保护间隔（或循环前缀）检测器以检测较窄带宽的传输。 例如，两兆赫（MHz）带宽接收机可以实现一个保护间隔检测器来检测1 MHz带宽信号，一个16M Hz带宽接收器可以实现逻辑检测一个或多个1 MHz带宽信号和任何其他组合，例如1 ，2,4,8 MHz带宽信号。 在许多实施例中，保护间隔检测器可被实现为检测被指定为主信道以及在一个或多个非主信道上的信道上的保护间隔。

公开(公告)号：US20140185662A1

公开(公告)日：2014-07-03

申请号：US13730996

申请日：2012-12-29

申请人： Shahrnaz Azizi ,  Eldad Perahia ,  Thomas J. Kenney

发明人： Shahrnaz Azizi ,  Eldad Perahia ,  Thomas J. Kenney

IPC分类号： H04L27/26

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03006 ,  H04L27/18 ,  H04L27/2662 ,  H04L27/2666 ,  H04L27/2675 ,  H04L2025/03414

摘要： Logic may comprise a single phase tracking implementation for all bandwidths of operation and the logic may adaptively change pre-defined and stored track parameters if the receiving packet is 1 MHz bandwidth. Logic may detect a packet and long training fields before performing a 1 MHz classification. Logic may auto-detect 1 MHz bandwidth transmissions by a property of the long training field sequences. Logic may auto-detect 1 MHz bandwidth transmissions by detecting a Binary Phase Shift Keying (BPSK) modulated first signal field symbol rather than the Quadrature Binary Phase Shift Keying (QBPSK) associated with the 2 MHz or greater bandwidth transmissions. Logic may perform an algorithm to determine an estimated phase correction value for a given orthogonal frequency division multiplexing symbol and several embodiments integrate this value with an intercept multiplier that may be 0.2 for 1 MHz transmissions and, e.g., 0.5 for 2 MHz or greater bandwidth communication.

摘要翻译： 逻辑可以包括用于所有操作带宽的单相跟踪实现，并且如果接收分组是1MHz带宽，则逻辑可以自适应地改变预定义和存储的轨道参数。 逻辑可以在执行1 MHz分类之前检测数据包和长训练字段。 逻辑可以通过长训练场序列的属性自动检测1 MHz带宽传输。 逻辑可以通过检测二进制相移键控（BPSK）调制的第一信号字段符号而不是与2MHz或更大带宽传输相关联的正交二进制相移键控（QBPSK）来自动检测1MHz带宽传输。 逻辑可以执行算法来确定给定的正交频分多路复用符号的估计相位校正值，并且若干实施例将该值与截距乘数集成，对于1MHz传输可以为0.2，并且例如对于2MHz或更大带宽通信为0.5 。

公开(公告)号：US20140146722A1

公开(公告)日：2014-05-29

申请号：US13685631

申请日：2012-11-26

申请人： Shahrnaz Azizi ,  Eldad Perahia ,  Thomas J. Kenney ,  Minyoung Park

发明人： Shahrnaz Azizi ,  Eldad Perahia ,  Thomas J. Kenney ,  Minyoung Park

IPC分类号： H04L29/06

CPC分类号： H04L69/22 ,  H04L27/2647

摘要： Embodiments may comprise logic such as hardware and/or code to reduce power consumption by, e.g., a device such as a station or relay by implementing prediction logic to decode and determine whether a communication affects the operation of the device. Some embodiments may comprise logic to receive at least a portion of a header of a frame from a physical layer and begin to decode the portion of the header of the frame without first checking the correctness of the value in the frame check sequence field. In many embodiments, prediction logic may determine whether the frame could have an impact on the operation of the device. For circumstances in which the prediction logic determines that the frame will not have an impact, the MAC logic may terminate processing, receipt, and decoding of the frame and enter the device into a low power consumption state.

摘要翻译： 实施例可以包括诸如硬件和/或代码的逻辑，以通过实现预测逻辑来解码并确定通信是否影响设备的操作来减少例如诸如站或中继的设备的功率消耗。 一些实施例可以包括用于从物理层接收帧的头部的至少一部分的逻辑，并且开始对帧的头部的部分进行解码，而不首先检查帧校验序列字段中的值的正确性。 在许多实施例中，预测逻辑可以确定帧是否可能对设备的操作产生影响。 对于预测逻辑确定帧不会产生影响的情况，MAC逻辑可以终止帧的处理，接收和解码，并将该设备进入低功耗状态。

公开(公告)号：US20140126385A1

公开(公告)日：2014-05-08

申请号：US13667922

申请日：2012-11-02

申请人： Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

发明人： Shahrnaz Azizi ,  Thomas J. Kenney ,  Eldad Perahia

IPC分类号： H04W24/02

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L25/0226 ,  H04L27/2647 ,  H04W24/02

摘要： Examples are disclosed for updating a wireless communication channel estimation. In some examples, a packet may be transmitted or received via a communication channel, the packet having one or more pilot signals that may shift between subcarrier frequencies based on a predetermined first variable associated with a first time duration. A second variable associated with a second time duration may be determined by the receiver of the data packet. The second variable may enable a receiver of the data packet to decide how many pilot signals may be used to update an initial channel estimation for the communication channel. Other examples are described and claimed.

摘要翻译： 公开了用于更新无线通信信道估计的示例。 在一些示例中，可以经由通信信道来发送或接收分组，该分组具有可以基于与第一持续时间相关联的预定第一变量在子载波频率之间移动的一个或多个导频信号。 与第二持续时间相关联的第二变量可以由数据分组的接收器确定。 第二变量可以使得数据分组的接收机能够决定可以使用多少导频信号来更新通信信道的初始信道估计。 其他的例子被描述和要求保护。