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    Short and long training fields
    2.
    发明授权
    Short and long training fields 有权
    短期和长期的培训领域

    公开(公告)号：US08553730B2

    公开(公告)日：2013-10-08

    申请号：US12868397

    申请日：2010-08-25

    Applicant: Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

    Inventor： Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

    IPC: H04J3/06

    CPC classification number: H04W56/001 ,  H04L27/2613 ,  H04L27/2634 ,  H04W4/80

    Abstract: A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN.

    Abstract translation: 一种方法包括接收包括复数部分的第一多个符号。 该方法还包括将共轭对称性应用于第一多个符号，产生不包含复杂部分的第二多个符号。 该方法还包括使用快速傅里叶反变换来变换第二多个符号，产生第三个多个符号。 该方法还包括内插第三多个符号，产生包括第三多个符号的至少一个实部的短训练场，产生包括第三多个符号的至少一个实部的长训练场，并发送 短期培训领域和长期培训领域的WPAN。

    PHY layer PPDU construction for body area network (BAN) devices
    3.
    发明授权
    PHY layer PPDU construction for body area network (BAN) devices 有权
    物理层PPDU构建体区域网（BAN）设备

    公开(公告)号：US08391228B2

    公开(公告)日：2013-03-05

    申请号：US12760513

    申请日：2010-04-14

    Applicant: Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

    Inventor： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

    IPC: H04W4/00 ,  H04W72/04

    CPC classification number: H04W4/80 ,  H04L27/18 ,  H04L27/20 ,  H04L27/2675 ,  H04L69/22 ,  H04W52/36 ,  H04W52/367 ,  H04W72/0453 ,  H04W74/0816

    Abstract: In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to construct a physical-layer service data unit (PSDU) based on a concatenate block, an insert shortened bits block, a Bose, Ray-Chaudhuri, Hocquenghem (BCH) encoder, a remove shortened bits block, an add pad bits block, a spreader, a bit interleaver, a scrambler, and a symbol mapper.

    Abstract translation: 在至少一些实施例中，通信设备包括具有物理（PHY）层的收发器。 基于用于BAN分组传输的恒定符号速率并且基于M-ary PSK，差分M-ary PSK或旋转差分M-ary PSK调制，PHY层被配置用于在有限多径环境中的体区域网络（BAN）操作。 PHY层被配置为基于级联块，插入缩短的比特块，Bose，Ray-Chaudhuri，Hocquenghem（BCH）编码器，移除缩短的比特块，加法来构造物理层服务数据单元（PSDU） 填充比特块，扩展器，比特交织器，加扰器和符号映射器。

    Wireless network system
    5.
    发明授权
    Wireless network system 有权
    无线网络系统

    公开(公告)号：US08437245B2

    公开(公告)日：2013-05-07

    申请号：US12873086

    申请日：2010-08-31

    Applicant: Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

    Inventor： Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

    IPC: H04J11/00 ,  H04J3/06

    CPC classification number: H04L5/0048 ,  H04B7/12 ,  H04L5/0042

    Abstract: A integrated circuit includes logic configured to support smart-utility-network communication using an integer number of data bits per symbol for 96, 48, 24, 12, and 4 data subcarriers across IFFT sizes of 128, 64, 32, 16, and 8.

    Abstract translation: 集成电路包括被配置为支持智能公用事业网络通信，所述智能公用事业网络通信使用跨越128,64,32,16和8的IFFT大小的96,48,24,12和4个数据子载波的每符号的整数数据比特 。

    Wireless networks utilizing multiple modulations
    7.
    发明授权
    Wireless networks utilizing multiple modulations 有权

    公开(公告)号：US09900193B2

    公开(公告)日：2018-02-20

    申请号：US13566639

    申请日：2012-08-03

    Applicant: Timothy Mark Schmidl ,  Srinath Hosur ,  Anuj Batra

    Inventor： Timothy Mark Schmidl ,  Srinath Hosur ,  Anuj Batra

    IPC: H04L27/00 ,  H04L27/26

    CPC classification number: H04L27/0012 ,  H04L27/2613

    Abstract: A method of communicating in a wireless network including a plurality of nodes having communications devices including a first node, wherein at least one node utilizes a first physical layer (PHY) modulation, and at least one other node utilizes a second PHY modulation different from the first PHY modulation. The first node receives a PHY frame transmitted by one of the plurality of nodes, and identifies a PHY modulation type selected from the first PHY modulation and the second PHY modulation used in the PHY frame or to be used in a subsequently to be received PHY frame or frame portion. The first node decodes the PHY frame or the subsequently to be received PHY frame or frame portion using the PHY modulation type identified in the identifying step.

    Noise variance estimation
    8.
    发明授权
    Noise variance estimation 有权
    噪声方差估计

    公开(公告)号：US08054914B2

    公开(公告)日：2011-11-08

    申请号：US12022461

    申请日：2008-01-30

    Applicant: Deric W. Waters ,  Anuj Batra ,  Srinath Hosur

    Inventor： Deric W. Waters ,  Anuj Batra ,  Srinath Hosur

    IPC: H03K9/00 ,  H04L27/00

    CPC classification number: H04L27/2647 ,  H04L1/206

    Abstract: A method and system for estimating noise variance. A method for noise variance estimation comprises receiving a first multi-sample symbol and receiving a second multi-sample symbol. The first multi-sample symbol is subtracted from the second multi-sample symbol to produce a set of noise samples. The set of noise samples is used to produce a noise variance estimate. The noise variance estimate is applied in various tasks (e.g. channel estimation, log-likelihood ratio computation, and/or minimum mean squared error equalization) to process data provided to a user.

    Abstract translation: 一种用于估计噪声方差的方法和系统。 一种用于噪声方差估计的方法包括接收第一多样本符号并接收第二多样本符号。 从第二多样本符号中减去第一多样本符号以产生一组噪声样本。 噪声样本集用于产生噪声方差估计。 在各种任务（例如信道估计，对数似然比计算和/或最小均方误差均衡）中应用噪声方差估计以处理提供给用户的数据。

    Robust detection of packet types
    9.
    发明授权
    Robust detection of packet types 有权
    分组类型的鲁棒检测

    公开(公告)号：US07957474B2

    公开(公告)日：2011-06-07

    申请号：US11618432

    申请日：2006-12-29

    Applicant: Deric Wayne Waters ,  Srinath Hosur ,  Anuj Batra

    Inventor： Deric Wayne Waters ,  Srinath Hosur ,  Anuj Batra

    IPC: H04K1/10

    CPC classification number: H04L27/0012 ,  H04L27/22 ,  H04L27/2647

    Abstract: Disclosed herein is a system and method for determining the presence of rotated-BPSK modulation. In addition, disclosed herein is a system and method for determining if a received packet is a Legacy, Mixed-Mode, or Green-Field packet in accordance with the determination of the presence of rotated-BPSK modulation. The presence of a Green-Field packet may be determined by detecting if additional tones are being excited in an LTF symbol of the received packet and/or if a SIG field symbol following the LTF symbol is modulated by rotated-BPSK. The presence of a Mixed-Mode packet may be determined by detecting if the first four bits of the SIG field symbol following the LTF symbol are [1 1 0 1] and/or detecting if a symbol following an L-SIG symbol is modulated by rotated-BPSK. The presence of a Legacy packet may be determined by detecting if the symbol following the L-SIG symbol is modulated by BPSK.

    Abstract translation: 本文公开了一种用于确定旋转BPSK调制的存在的系统和方法。 此外，本文所公开的是根据确定旋转BPSK调制的确定来确定接收的分组是传统的，混合模式的还是绿色场分组的系统和方法。 可以通过检测在接收到的分组的LTF符号中是否激励附加音调和/或如果通过旋转BPSK调制LTF符号之后的SIG字段符号，则可以确定绿场分组的存在。 混合模式分组的存在可以通过检测LTF符号之后的SIG字段符号的前四位是否为[1×10 1]和/或检测在L-SIG符号之后的符号是否被 旋转BPSK。 可以通过检测L-SIG符号之后的符号是否被BPSK调制来确定遗留分组的存在。

    Time-switched preamble generator, method of generating and multiple-input, multiple-output communication system employing the generator and method
    10.
    发明授权
    Time-switched preamble generator, method of generating and multiple-input, multiple-output communication system employing the generator and method 有权
    时间切换前导码生成器，生成和多输入方法，采用发生器和方法的多输出通信系统

    公开(公告)号：US07864661B2

    公开(公告)日：2011-01-04

    申请号：US10755603

    申请日：2004-01-12

    Applicant: Srinath Hosur ,  Srikanth Gummadi ,  Anuj Batra ,  David P. Magee

    Inventor： Srinath Hosur ,  Srikanth Gummadi ,  Anuj Batra ,  David P. Magee

    IPC: H04J11/00

    CPC classification number: H04W88/08

    Abstract: The present invention is directed to a time-switched preamble generator and method of generating a time-switched preamble for use with a multiple-input, multiple-output (MIMO) transmitter employing first and second transmit antennas. In one embodiment, the time-switched preamble generator includes an initial preamble formatter configured to provide a first preamble to the first transmit antenna and a second preamble to the second transmit antenna during an initial time interval. The time-switched preamble generator also includes a subsequent preamble formatter coupled to the initial preamble formatter and configured to provide the second preamble to the first transmit antenna and the first preamble to the second transmit antenna during a subsequent time interval.

    Abstract translation: 本发明涉及一种时间切换前导码生成器和用于与采用第一和第二发射天线的多输入多输出（MIMO）发射机一起使用的时间切换前同步码的方法。 在一个实施例中，时间切换前导码生成器包括初始前同步码格式器，其被配置为在初始时间间隔期间向第一发射天线提供第一前同步码和第二前导码到第二发射天线。 时间切换前导码生成器还包括后续前导码格式器，其耦合到初始前导码格式化器并且被配置为在随后的时间间隔期间向第一发射天线提供第二前同步码和第一前导码到第二发射天线。

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