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    • 91. 发明授权
    • Frame control encoder/decoder for robust OFDM frame transmissions
    • 用于鲁棒OFDM帧传输的帧控制编码器/解码器
    • US06289000B1
    • 2001-09-11
    • US09574959
    • 2000-05-19
    • Lawrence W. Yonge, III
    • Lawrence W. Yonge, III
    • H04J1100
    • H04L1/0065H03M13/2909H03M13/2948H03M13/3784H03M13/3944H03M13/45H03M13/658H04L1/0041H04L1/005H04L1/0052H04L1/0055H04L1/0071H04L1/04H04L27/2602
    • An encoder/decoder scheme for robust transmission of PHY layer frame control information (to support medium access) in OFDM frames (or packets). The PHY layer frame control information to be modulated onto carriers in OFDM symbols is encoded using a product coding to form a product code block or matrix. The product coding is based on a shortened hamming code codeword set having properties of symmetry. Elements of the product code matrix are interleaved so that the elements are modulated onto the carriers of the symbols in diagonal groupings (across time and frequency) and with some degree of redundancy. The modulated elements are demodulated to produce soft decision values, which are de-interleaved to combine copies of the soft values for elements and re-order the soft values in the order of the elements prior to interleaving. The soft values for each row and each column are provided to a turbo product decoder, which performs a number of iterations of row/column decoding, each iteration applying a weighting to the results to enhance the reliability of the results of each next successive iteration. Upon completion of the final iteration, the decoder applies a hard decision to the soft values to produce a set of hard values for each of the soft values that corresponds to the frame control information. Given the symmetry of the code set, the row/column decoding generates a complete set of correlation values from only a subset of the complete set of correlation values and uses a reduced number of MAP decoding operations to select the best correlation values for each of the soft values.
    • 用于OFDM帧(或分组)中的PHY层帧控制信息(以支持媒体接入)的鲁棒传输的编码器/解码器方案。 要使用产品编码对OFDM符号中要调制到载波上的PHY层帧控制信息进行编码以形成乘积码块或矩阵。 产品编码基于具有对称特性的缩短的汉明码码字集合。 产品代码矩阵的元素被交织,使得元素在对角线分组(跨越时间和频率)并以一定程度的冗余度被调制到符号的载波上。 经调制的元件被解调以产生软判决值,其被解交织以组合元件的软值的副本并且在交织之前按照元素的顺序重新排序软值。 每行和每列的软值被提供给turbo产品解码器,该turbo产品解码器执行行/列解码的多次迭代,每次迭代对结果应用加权以增强每个下一个连续迭代的结果的可靠性。 在完成最终迭代之后,解码器对软值应用硬判决,以产生对应于帧控制信息的每个软值的一组硬值。 给定代码集的对称性,行/列解码从完整的相关值集合的子集中生成完整的一组相关值,并且使用减少数量的MAP解码操作来选择每个的最佳相关值 软值。
    • 92. 发明授权
    • Synchronization of OFDM signals
    • OFDM信号同步
    • US6111919A
    • 2000-08-29
    • US234289
    • 1999-01-20
    • Lawrence W. Yonge, III
    • Lawrence W. Yonge, III
    • H04J11/00H04L7/00H04L27/26H04K1/10H04L27/28
    • H04L27/2662H04L27/2679
    • A method is described for temporally aligning a received symbol that is transmitted via orthogonal channels, e.g., OFDM channels, with a reference symbol and/or an earlier received symbol. The method includes computing phases of the first symbol for the orthogonal transmission channels and comparing the computed phases of the first symbol with phases of the reference. The phases of the first symbol are successively displaced by a predetermined phase shift which depends on the channel frequency to obtain a correlation result. The temporal alignment is determined by detecting a correlation maximum based on the correlation result and used to synchronize the first symbol with the reference. The reference can also be an earlier received symbol to provide autocorrelation. The received symbols can be processed by applying a window function, e.g. a Hanning, Hamming or Blackman window. Phase correlation provides reliable time synchronization in the presence of jammers emitting narrowband signals in excess of 32 dB above the signal level.
    • 描述了一种用于将经由诸如OFDM信道的正交信道发送的接收符号与参考符号和/或较早接收到的符号进行时间对准的方法。 该方法包括计算用于正交传输信道的第一符号的相位,并将计算出的第一符号的相位与参考的相位进行比较。 第一符号的相位依次取决于通道频率以获得相关结果而相继移位预定的相移。 通过基于相关结果检测相关最大值并用于使第一符号与参考同步来确定时间对准。 该参考也可以是较早接收的符号以提供自相关。 可以通过应用窗口功能来处理所接收的符号,例如, 汉宁,汉明或布莱克曼窗。 相位相位提供可靠的时间同步,存在干扰信号发射超过信号电平32 dB的窄带信号。
    • 95. 发明授权
    • Generating signals for transmission of information
    • 生成信号传输信息
    • US08054901B2
    • 2011-11-08
    • US12536263
    • 2009-08-05
    • Lawrence W. Yonge, IIITimothy J. Vandermey
    • Lawrence W. Yonge, IIITimothy J. Vandermey
    • H04K1/10
    • H04L27/2608H04L27/2602
    • A method for generating a signal is presented. The method includes selecting a first set of carrier frequencies that are integral multiples of a first frequency interval, and selecting a second set of carrier frequencies that are integral multiples of a second frequency interval. The second frequency interval is an integral multiple of the first frequency interval and the second set is a subset of the first set. The method includes, for each of one or more signal carrier frequencies in the second set, selecting a plurality of associated carrier frequencies in the first set including a peak carrier frequency having substantially the same value as the signal carrier frequency, and modulating waveform frequency components at each of the selected plurality of associated carrier frequencies according to the same data value.
    • 提出了一种产生信号的方法。 该方法包括选择作为第一频率间隔的整数倍的第一组载波频率,以及选择作为第二频率间隔的整数倍的第二组载波频率。 第二频率间隔是第一频率间隔的整数倍,第二组是第一组的子集。 该方法包括对于第二组中的一个或多个信号载波频率中的每一个,选择包括具有与信号载波频率基本相同的值的峰值载波频率的第一组中的多个相关联的载波频率,以及调制波形频率分量 根据相同的数据值在所选择的多个相关联的载波频率中的每一个。
    • 97. 发明申请
    • TRANSMISSION SUPPRESSION
    • 传输抑制
    • US20100124289A1
    • 2010-05-20
    • US12617032
    • 2009-11-12
    • Lawrence W. Yonge, IIIArun AvudainayagamTimothy J. Vandermey
    • Lawrence W. Yonge, IIIArun AvudainayagamTimothy J. Vandermey
    • H04B3/00
    • H03F1/3247H03F1/3258H03F1/34H03F3/195H03F3/24H03F3/245H03F2200/204H03F2200/451H04B2001/0433
    • A transmission suppression apparatus includes a first modulator that converts a symbol to a waveform. The apparatus further includes a first non-linear filter, configured to at least partially compensate for non-linear distortions of a transmission signal path. The apparatus further includes a first medium coupling device for coupling signals to a communication medium. The apparatus further includes a second medium coupling device for coupling signals from the communication medium. The apparatus further includes summing circuitry with a first input connected to an output of the second medium coupling device. The apparatus further includes cancellation circuitry, connected to a second input of the summing circuit, that converts the symbol to an analog waveform that is substantially 180 degrees out of phase with the analog waveform encoding the symbol on the first input to the summing circuit.
    • 传输抑制装置包括将符号转换为波形的第一调制器。 该装置还包括第一非线性滤波器,其被配置为至少部分地补偿传输信号路径的非线性失真。 该装置还包括用于将信号耦合到通信介质的第一介质耦合装置。 该装置还包括用于耦合来自通信介质的信号的第二介质耦合装置。 该装置还包括与第二输入连接的第二输入的第二输入的加法电路。 该装置还包括连接到求和电路的第二输入的取消电路,其将符号转换为与将第一输入上的符号编码到求和电路的模拟波形基本上为180度异相的模拟波形。
    • 98. 发明授权
    • Establishing shared information in a network
    • 在网络中建立共享信息
    • US07664955B2
    • 2010-02-16
    • US11484542
    • 2006-07-10
    • Richard E. NewmanLawrence W. Yonge, III
    • Richard E. NewmanLawrence W. Yonge, III
    • H04L9/00
    • H04L9/0838H04L9/0875
    • A method for establishing shared information is described. The method includes estimating characteristics of a communication channel between two nodes based on signals transmitted between the nodes. The method also includes transmitting a signal from the first node to the second node, the signal being modulated with a first data sequence according to a first estimated characteristic, and transmitting a signal from the second node to the first node, the signal being modulated with a second data sequence according to a second estimated characteristic. Shared information is formed at each of the first and second nodes based on at least a portion of the first data sequence and at least a portion of the second data sequence.
    • 描述了建立共享信息的方法。 该方法包括基于在节点之间传输的信号来估计两个节点之间的通信信道的特性。 该方法还包括将信号从第一节点发射到第二节点,该信号根据第一估计特性利用第一数据序列进行调制,以及将信号从第二节点发射到第一节点,该信号由 根据第二估计特性的第二数据序列。 基于第一数据序列的至少一部分和第二数据序列的至少一部分,在第一和第二节点中的每一个处形成共享信息。
    • 100. 发明授权
    • Multicast and broadcast transmission with partial ARQ
    • 具有部分ARQ的组播和广播传输
    • US06522650B1
    • 2003-02-18
    • US09632595
    • 2000-08-04
    • Lawrence W. Yonge, IIIStanley J. Kostoff, II
    • Lawrence W. Yonge, IIIStanley J. Kostoff, II
    • H04L1228
    • H04L1/0057H04L1/0002H04L1/0025H04L1/1685H04L1/1877H04L1/188H04L12/18H04L12/1868H04L12/1881H04L12/403H04L12/42H04L2001/0093Y02D50/10
    • A partial ARQ protocol for multicast and broadcast transmissions in network devices operating in a shared medium access network. To support the partial ARQ, a media access control (MAC) protocol uses robustly transmitted frame delimiters and a MAC management frame structure. In a multicast or broadcast frame with partial ARQ, a destination address field is set to that of a selected proxy device's address, and the address of the intended recipients (of group address of the intended recipients) is placed in an entry in the MAC management frame structure. The frame also contains a multicast flag set to indicate that the transmission is intended for more than one device and a value in the frame delimiters to indicate that a response is requested. Upon receipt of such a frame, the proxy device specified by the destination address field provides an appropriate response type on behalf of the group. The non-proxy recipients, detecting the multicast flag setting, know to ignore the DA in the destination address field and instead look to the MAC management entry for actual destination addresses.
    • 用于在共享介质接入网络中操作的网络设备中的组播和广播传输的部分ARQ协议。 为了支持部分ARQ,媒体访问控制(MAC)协议使用鲁棒传输的帧分隔符和MAC管理帧结构。 在具有部分ARQ的多播或广播帧中,将目的地地址字段设置为所选代理设备地址的目的地址字段,并且将预期接收者(预期接收者的组地址的地址)放置在MAC管理中的条目中 框架结构。 帧还包含设置为指示传输是针对多于一个设备的多播标志,并且帧分隔符中的值指示响应被请求。 在接收到这样的帧时,由目的地地址字段指定的代理设备代表该组提供适当的响应类型。 检测多播标志设置的非代理收件人知道忽略目的地址字段中的DA,而是查看MAC管理条目的实际目的地址。