公开(公告)号：US09900193B2

公开(公告)日：2018-02-20

申请号：US13566639

申请日：2012-08-03

申请人： Timothy Mark Schmidl ,  Srinath Hosur ,  Anuj Batra

发明人： Timothy Mark Schmidl ,  Srinath Hosur ,  Anuj Batra

IPC分类号： H04L27/00 ,  H04L27/26

CPC分类号： H04L27/0012 ,  H04L27/2613

摘要： 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.

公开(公告)号：US09294316B2

公开(公告)日：2016-03-22

申请号：US13168180

申请日：2011-06-24

申请人： Timothy M. Schmidl ,  Anuj Batra

发明人： Timothy M. Schmidl ,  Anuj Batra

IPC分类号： H04L27/28 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04W12/02 ,  H04L25/03866 ,  H04L27/2601

摘要： An integrated circuit includes logic configured to generate scrambling sequences, each based on a different scrambling seed, for a smart-utility-network data packet communication. A Hamming distance between any two scrambling sequences is half the length of a PSDU of the data packet or greater.

摘要翻译： 集成电路包括被配置为产生扰频序列的逻辑，每个加扰序列基于不同的加扰种子，用于智能公用事业网络数据分组通信。 任何两个加扰序列之间的汉明距离是数据分组的PSDU的长度的一半或更大。

公开(公告)号：US08503553B2

公开(公告)日：2013-08-06

申请号：US12961032

申请日：2010-12-06

申请人： Timothy M. Schmidl ,  Anuj Batra

发明人： Timothy M. Schmidl ,  Anuj Batra

IPC分类号： H04K1/10

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L25/0204 ,  H04L27/2613 ,  H04W4/80 ,  H04W48/08 ,  H04W84/10

摘要： An integrated circuit includes logic configured to encode pilot signals in a first set of subcarriers of an orthogonal frequency division multiplexing (“OFDM”) symbol and in a second set of subcarriers of a consecutive OFDM symbol. The symbol and the consecutive symbol are in the same smart-utility-network packet.

摘要翻译： 集成电路包括被配置为对正交频分复用（“OFDM”）符号的第一组子载波和连续OFDM符号的第二组子载波中的导频信号进行编码的逻辑。 符号和连续符号位于相同的智能公用网络数据包中。

公开(公告)号：US08054914B2

公开(公告)日：2011-11-08

申请号：US12022461

申请日：2008-01-30

申请人： Deric W. Waters ,  Anuj Batra ,  Srinath Hosur

发明人： Deric W. Waters ,  Anuj Batra ,  Srinath Hosur

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L27/2647 ,  H04L1/206

摘要： 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.

摘要翻译： 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。

公开(公告)号：US08054742B2

公开(公告)日：2011-11-08

申请号：US12548300

申请日：2009-08-26

申请人： June Chul Roh ,  Anuj Batra

发明人： June Chul Roh ,  Anuj Batra

IPC分类号： H04J11/00 ,  H04B15/00

CPC分类号： H04L27/2634

摘要： A system and method for sidelobe suppression in OFDM communications systems is provided. A method for transmitting an information symbol having a plurality of information sub-carriers and a plurality of active interference cancellation (AIC) sub-carriers includes generating AIC sub-carrier data based on the information to be transmitted, populating the plurality of information sub-carriers with the information, populating the plurality of AIC sub-carriers with the AIC sub-carrier data, applying baseband processing to the information symbol, thereby producing a processed symbol, and transmitting the processed symbol.

摘要翻译： 提供了OFDM通信系统中用于旁瓣抑制的系统和方法。 一种用于发送具有多个信息子载波和多个主动干扰消除（AIC）子载波的信息符号的方法，包括：基于要发送的信息生成AIC子载波数据，填充多个信息子载波， 携带信息，用AIC子载波数据填充多个AIC子载波，对信息符号应用基带处理，从而产生处理后的符号，并发送处理后的符号。

公开(公告)号：US07957760B2

公开(公告)日：2011-06-07

申请号：US12508078

申请日：2009-07-23

申请人： Anuj Batra ,  Srinivas Lingam

发明人： Anuj Batra ,  Srinivas Lingam

IPC分类号： H04B1/00 ,  H04B7/00 ,  H04Q11/12

CPC分类号： H04W52/242 ,  H04W52/08 ,  H04W52/246 ,  H04W52/283 ,  H04W52/50

摘要： The distance between a first Multi Band Orthogonal Frequency Division Multiplex (MB-OFDM) data transceiver and a second or more such transceiver is determined using known techniques. The radio frequency path loss between transceivers is estimated given said distance, using a known relationship between distance and path loss, and further accounting for line-of-sight or non-line-of-sight conditions if desired. This path loss value is added to the typically minimum transmit power level, absent path loss, needed for reliable data communication. This modified initial transmit power level is then used by the first transceiver to begin the known iterative feedback process of transmit power control (TPC). Because this modified initial transmit power level, based on distance, is closer to the final optimum level, convergence in the TPC process occurs in fewer steps and less time than had the initial transmit power been maximum power as is typical in known TPC systems.

摘要翻译： 使用已知技术确定第一多频带正交频分复用（MB-OFDM）数据收发机与第二或更多个这样的收发机之间的距离。 使用距离和路径损耗之间的已知关系，给出所述距离估计收发器之间的射频路径损耗，并且如果需要，进一步考虑视线或非视距条件。 该路径损耗值被添加到可靠数据通信所需的通常最小发射功率电平，不存在路径损耗。 该修改的初始发射功率电平然后由第一收发器用于开始已知的发射功率控制（TPC）的迭代反馈处理。 由于这种基于距离的修改的初始发射功率电平更接近于最终的最优电平，所以在已知TPC系统中典型的情况下，TPC过程中的收敛在比初始发射功率达到最大功率的步骤少，时间更短的时间内发生。

公开(公告)号：US07957474B2

公开(公告)日：2011-06-07

申请号：US11618432

申请日：2006-12-29

申请人： Deric Wayne Waters ,  Srinath Hosur ,  Anuj Batra

发明人： Deric Wayne Waters ,  Srinath Hosur ,  Anuj Batra

IPC分类号： H04K1/10

CPC分类号： H04L27/0012 ,  H04L27/22 ,  H04L27/2647

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20110129032A1

公开(公告)日：2011-06-02

申请号：US13022746

申请日：2011-02-08

申请人： Anuj Batra ,  Deric W. Waters

发明人： Anuj Batra ,  Deric W. Waters

IPC分类号： H04L27/36

CPC分类号： H04L27/2602

摘要： Systems and methods for dual-carrier modulation (DCM) encoding and decoding for communication systems. Some embodiments comprise a DCM encoder for applying a pre-transmission function to at least one 16-QAM input symbol and mapping resulting transformed symbols onto at least one larger constellation prior to transmission. Some embodiments joint decode, by a DCM decoder, a predetermined number of received data elements and compute a set of log-likelihood ratio (LLR) values for at least eight bits from a resulting at least one transformed symbol.

摘要翻译： 用于通信系统的双载波调制（DCM）编码和解码的系统和方法。 一些实施例包括DCM编码器，用于将预传输功能应用于至少一个16-QAM输入符号，并且在传输之前将所得到的变换符号映射到至少一个较大星座上。 一些实施例由DCM解码器联合解码预定数量的接收数据元素，并从所得到的至少一个变换符号计算至少八位的对数似然比（LLR）值集合。

公开(公告)号：US20110051845A1

公开(公告)日：2011-03-03

申请号：US12873114

申请日：2010-08-31

申请人： Timothy M. SCHMIDL ,  Anuj BATRA ,  Srinath HOSUR

发明人： Timothy M. SCHMIDL ,  Anuj BATRA ,  Srinath HOSUR

IPC分类号： H04B7/02 ,  H04L27/00

CPC分类号： H04L27/2626 ,  H04B7/12 ,  H04L1/0071 ,  H04L1/08 ,  H04L27/2602 ,  H04L27/2621

摘要： An integrated circuit includes logic configured to encode one or more first data symbols in one or more first sub-carriers as one or more second data symbols in one or more second sub-carriers of a smart-utility-network communication.

摘要翻译： 集成电路包括被配置为将一个或多个第一子载波中的一个或多个第一数据符号编码为智能公用网络通信的一个或多个第二子载波中的一个或多个第二数据符号的逻辑。

公开(公告)号：US07864661B2

公开(公告)日：2011-01-04

申请号：US10755603

申请日：2004-01-12

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

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

IPC分类号： H04J11/00

CPC分类号： H04W88/08

摘要： 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.

摘要翻译： 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。