Power control for wireless LAN stations
    21.
    发明授权
    Power control for wireless LAN stations 有权
    无线局域网站功率控制

    公开(公告)号:US09031044B2

    公开(公告)日:2015-05-12

    申请号:US12352733

    申请日:2009-01-13

    IPC分类号: H04W52/24 H04W52/08 H04W52/14

    摘要: Techniques and apparatus for controlling the transmit power of an uplink (UL) signal from a user terminal in a wireless communications system in an effort to achieve some target characteristic, such as a target carrier-to-interference (C/I) ratio, at an access point (AP) are provided. In this manner, such a user terminal may help avoid or compensate for imbalances in received radio frequency (RF) power between UL signals received from multiple user terminals by the AP. For example, the transmit power at each user terminal may be controlled in an effort to achieve a target post-processing C/I ratio of 28 dB per spatial stream in an effort to reduce large power imbalances and optimize throughput per user terminal. The user terminal and the AP may compose part of a multiple-input multiple-output (MIMO) communication system utilizing spatial-division multiple access (SDMA) techniques.

    摘要翻译: 用于在无线通信系统中用于控制来自用户终端的上行链路(UL)信号的发射功率的技术和装置,以努力实现诸如目标载波干扰(C / I)比等目标特性 提供接入点(AP)。 以这种方式,这样的用户终端可以帮助避免或补偿由AP从多个用户终端接收的UL信号之间的接收射频(RF)功率的不平衡。 例如,可以控制每个用户终端处的发射功率,以努力实现每个空间流28dB的目标后处理C / I比,以减少大的功率不平衡并优化每个用户终端的吞吐量。 用户终端和AP可以利用空分多址(SDMA)技术构成多输入多输出(MIMO)通信系统的一部分。

    Channel state information feedback frame format and feedback rules for very high throughput wireless systems
    24.
    发明授权
    Channel state information feedback frame format and feedback rules for very high throughput wireless systems 有权
    信道状态信息反馈帧格式和非常高吞吐量无线系统的反馈规则

    公开(公告)号:US08908600B2

    公开(公告)日:2014-12-09

    申请号:US13280776

    申请日:2011-10-25

    CPC分类号: H04B7/0626 H04B7/0632

    摘要: Certain aspects of the present disclosure provide techniques and apparatus for generating a unified format of channel state information (CSI) feedback for Very High Throughput (VHT) wireless systems. One example method generally includes generating, at a first apparatus, a frame comprising information relating to SNR if a second apparatus is communicating with the first apparatus using single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO) and transmitting a signal based on the generated frame to the second apparatus. Another example method generally includes generating, at an apparatus, a structure comprising CSI, wherein the CSI includes one of a first matrix with estimates of a channel associated with the apparatus or a second matrix obtained based on singular value decomposition (SVD) of the first matrix and wherein the structure further comprises an indication of which of the first and second matrices is included in the CSI; and transmitting the structure over the channel.

    摘要翻译: 本公开的某些方面提供用于为非常高吞吐量(VHT)无线系统生成统一格式的信道状态信息(CSI)反馈的技术和装置。 一个示例性方法通常包括在第一装置处产生包括与SNR有关的信息的帧,如果第二装置使用单用户MIMO(SU-MIMO)或多用户MIMO(MU-MIMO)和第一装置正在与第一装置进行通信,则 基于所生成的帧向第二装置发送信号。 另一示例性方法通常包括在装置处生成包括CSI的结构,其中CSI包括具有与该装置相关联的信道的估计的第一矩阵之一或基于第一矩阵的奇异值分解(SVD)获得的第二矩阵 矩阵,并且其中所述结构还包括所述CSI中包括所述第一和第二矩阵中的哪一个的指示; 并通过信道发送结构。

    Systems and methods for monitoring a wireless network
    25.
    发明授权
    Systems and methods for monitoring a wireless network 有权
    用于监控无线网络的系统和方法

    公开(公告)号:US08867667B2

    公开(公告)日:2014-10-21

    申请号:US13438639

    申请日:2012-04-03

    IPC分类号: H04L27/00 H04W88/06

    CPC分类号: H04W88/06 Y02D70/142

    摘要: Systems, methods, and devices to enable monitoring of wireless networks are described herein. In some aspects, a low power receiver or a receiver operating in a low power mode scans for signals with a moderate or low duty cycle. If a signal identifying a device or user of the receiver, or a signal indicating that there will be a subsequent data communication, is received, a high power receiver or a receiver operating in a high power mode is activated to receive data communications.

    摘要翻译: 本文描述了能够监视无线网络的系统,方法和设备。 在一些方面,低功率接收机或以低功率模式工作的接收机扫描中等或低占空比的信号。 如果接收到识别接收机的设备或用户的信号或指示将进行后续数据通信的信号,则激活高功率接收机或以高功率模式操作的接收机以接收数据通信。

    Scalable space-frequency coding for MIMO systems
    26.
    发明授权
    Scalable space-frequency coding for MIMO systems 有权
    MIMO系统的可扩展空间频率编码

    公开(公告)号:US08830813B1

    公开(公告)日:2014-09-09

    申请号:US13448185

    申请日:2012-04-16

    IPC分类号: H04J11/00

    摘要: Systems, devices, and techniques for MIMO (Multiple-In-Multiple-Out) based space-frequency coding can include, in at least some implementations, techniques that include selecting a spatial multiplexing rate M for a transmission of data via two or more antennas, the data comprising N data streams, applying a first mapping to map the N data streams to a first portion of the antennas for a first data tone; and applying a different second mapping to map the N data streams to a different second portion of the antennas for a second data tone.

    摘要翻译: 基于MIMO(Multiple-In-Multiple-Out)的空间 - 频率编码的系统,设备和技术在至少一些实施方式中可以包括:通过两个或更多个天线选择用于数据传输的空间复用速率M ,所述数据包括N个数据流,应用第一映射以将N个数据流映射到第一数据音调的天线的第一部分; 以及应用不同的第二映射以将N个数据流映射到用于第二数据音调的天线的不同第二部分。

    Systems and methods for approximating log likelihood ratios in a communication system
    28.
    发明授权
    Systems and methods for approximating log likelihood ratios in a communication system 失效
    用于在通信系统中近似对数似然比的系统和方法

    公开(公告)号:US08761316B2

    公开(公告)日:2014-06-24

    申请号:US12406868

    申请日:2009-03-18

    IPC分类号: H04L27/06

    CPC分类号: H04L25/067 H04L1/0052

    摘要: Systems and methods for computing log likelihood ratios in a communication system are described. A demodulated symbol may be received. A set of scalars may be determined based on a modulation order, a signal-to-noise ratio for the symbol, and a bit of the symbol. At least one log likelihood ratio for the bit may be approximated using a piecewise linear process based on the scalars and the symbol.

    摘要翻译: 描述用于计算通信系统中的对数似然比的系统和方法。 可以接收解调的符号。 可以基于调制阶数,符号的信噪比和符号的位来确定一组标量。 可以使用基于标量和符号的分段线性处理来近似该比特的至少一个对数似然比。

    Rate adaptation in wireless systems
    29.
    发明授权
    Rate adaptation in wireless systems 失效
    无线系统中的速率适配

    公开(公告)号:US08693331B1

    公开(公告)日:2014-04-08

    申请号:US12983825

    申请日:2011-01-03

    IPC分类号: G08C15/00

    CPC分类号: H04W28/22 H04W84/18

    摘要: Systems and techniques for rate adaptation in wireless communication systems are described. A described technique includes generating a transmission packet parameter associated with packets transmitted by a device at a first data rate; generating a reception packet parameter associated with packets received by the device; determining a second data rate based on the transmission packet parameter and the reception packet parameter; and transmitting future packets at the second data rate.

    摘要翻译: 描述了用于无线通信系统中速率适配的系统和技术。 所描述的技术包括:以第一数据速率生成与由设备发送的分组相关联的传输分组参数; 产生与由所述设备接收的分组相关联的接收分组参数; 基于所述传输分组参数和所述接收分组参数来确定第二数据速率; 并以第二数据速率发送未来数据包。

    Systems and methods for wireless communication in sub gigahertz bands
    30.
    发明授权
    Systems and methods for wireless communication in sub gigahertz bands 有权
    用于无线通信的子系统和方法

    公开(公告)号:US08625690B2

    公开(公告)日:2014-01-07

    申请号:US13410633

    申请日:2012-03-02

    IPC分类号: H04K1/10

    摘要: Systems, methods, and devices for wireless communication. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a receiver configured to receive a wireless signal comprising a packet. At least a portion of the wireless signal is configured to be received over a bandwidth lower than or equal to 1.25 MHz. The packet is formed from at least one orthogonal frequency-division multiplexing (OFDM) symbol comprising thirty-two tones. The thirty-two tones correspond to frequency subcarriers within the bandwidth. The thirty-two tones of the at least one OFDM symbol are allocated as: twenty-four data tones, two pilot tones, five guard tones, and one direct current (DC) tone. The apparatus includes a processor configured to evaluate the wireless signal. The processor includes a transform module configured to convert the at least one OFDM symbol into a frequency domain signal using a thirty-two point mode.

    摘要翻译: 用于无线通信的系统,方法和设备。 一方面,提供一种无线通信装置。 该装置包括被配置为接收包括分组的无线信号的接收机。 无线信号的至少一部分被配置为在低于或等于1.25MHz的带宽上接收。 分组由包括三十二个音调的至少一个正交频分复用(OFDM)符号形成。 32个音调对应于带宽内的频率子载波。 至少一个OFDM符号的三十二个音调被分配为:二十四个数据音调,两个导频音调,五个保护音调和一个直流(DC)音调。 该装置包括被配置为评估无线信号的处理器。 处理器包括变换模块,其被配置为使用三十二点模式将至少一个OFDM符号转换成频域信号。