公开(公告)号：US08155600B2

公开(公告)日：2012-04-10

申请号：US11949394

申请日：2007-12-03

申请人： Yehuda Azenkot ,  Manoneet Singh

发明人： Yehuda Azenkot ,  Manoneet Singh

IPC分类号： H04B1/40

CPC分类号： H04L27/0014 ,  H03J7/04 ,  H04L2027/0016 ,  H04L2027/0018 ,  H04L2027/0024 ,  H04L2027/0034

摘要： Systems and methods for digital communication using an inexpensive reference crystal are described herein. Some illustrative embodiments include a method that includes setting a center frequency of a local oscillator used by a radio frequency (RF) transceiver, sequentially applying each of a plurality of predetermined offsets to the center frequency of the local oscillator, determining a plurality of metrics indicative of the quality of a received signal (each of the plurality of metrics corresponding to a different predetermined offset of the plurality of predetermined offsets), and selecting a predetermined offset of the plurality of predetermined offsets that results in a metric indicating a received signal that is higher in quality than the received signal that results when applying each of the remaining predetermined offsets of the plurality of offsets.

摘要翻译： 本文描述了使用便宜的参考晶体进行数字通信的系统和方法。 一些说明性实施例包括一种方法，其包括设置由射频（RF）收发器使用的本地振荡器的中心频率，将多个预定偏移中的每一个顺序地应用于本地振荡器的中心频率，确定多个指标 接收信号的质量（多个度量中的每一个对应于多个预定偏移的不同的预定偏移量），并且选择导致指示接收信号的度量的多个预定偏移量的预定偏移量 质量高于在应用多个偏移量的剩余预定偏移量时产生的接收信号。

公开(公告)号：US07894503B2

公开(公告)日：2011-02-22

申请号：US11731932

申请日：2007-04-02

申请人： Yehuda Azenkot ,  Manoneet Singh ,  William L. Abbott ,  Gregory Lerner

发明人： Yehuda Azenkot ,  Manoneet Singh ,  William L. Abbott ,  Gregory Lerner

IPC分类号： H04B1/00

CPC分类号： H04B1/71632 ,  H04B1/7143 ,  H04B1/719 ,  H04W72/04 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/40

摘要： A system and method of flexible channel allocation in an ultra wideband frequency hopping communication system is disclosed. In one embodiment, a method includes communicating radio signals through rapidly switching among a band group 6 according to a hopping pattern. The method also includes scanning the ultra wideband spectra to determine the band group 6 based on the hopping pattern of the radio signals.In another embodiment, a method includes scanning ultra wideband spectra to eliminate any frequency band of the ultra wideband spectra from a list of available frequency bands when the any frequency band is currently used, selecting a band group in combination of two or more frequency bands to communicate radio signals with an optimal transmission power and/or maximum range, and communicating the radio signals through rapidly switching among the band group.

摘要翻译： 公开了一种在超宽带跳频通信系统中灵活的信道分配的系统和方法。 在一个实施例中，一种方法包括通过根据跳频图案在频带组6之间快速切换来传送无线电信号。 该方法还包括扫描超宽带频谱以基于无线电信号的跳频模式来确定频带组6。 在另一个实施例中，一种方法包括扫描超宽带频谱以从当前使用的任何频带的可用频带的列表中消除超宽带频谱的任何频带，选择两个或多个频带组合的频带组 以最佳发射功率和/或最大范围传送无线电信号，并通过频带组之间的快速切换来传送无线电信号。

公开(公告)号：US20070248195A1

公开(公告)日：2007-10-25

申请号：US11739094

申请日：2007-04-23

申请人： Gregory Lerner ,  Nir Tal ,  Dan Wolberg ,  Manoneet Singh ,  Yehuda Azenkot

发明人： Gregory Lerner ,  Nir Tal ,  Dan Wolberg ,  Manoneet Singh ,  Yehuda Azenkot

IPC分类号： H04L27/06

CPC分类号： H04L27/2656 ,  H04L7/042 ,  H04L7/08 ,  H04L27/2657 ,  H04L27/2679 ,  H04L2027/0046 ,  H04L2027/0065

摘要： A novel and useful apparatus for and method of packet detection and carrier frequency offset estimation. The packet detection mechanism is robust to channels and sustains reasonable miss-detect (and false alarm) rates at low SNR values. The mechanism uses a modified combined cross correlation and delay and correlate scheme. A delay and correlate scheme is used in order to handle the effects of multipath while swapping integration and multiplication to increase cross-correlation factors resulting in improved sensitivity in low SNR conditions. Correlation is divided into multiple chains to generate a plurality of partial correlations to observe short patterns in the spread sequence resulting in improved performance in long multipath channels.

摘要翻译： 一种新颖有用的分组检测和载波频率偏移估计方法及方法。 分组检测机制对信道是鲁棒的，并且在低SNR值下维持合理的错误检测（和误报）速率。 该机制采用改进的组合互相关和延迟和相关方案。 使用延迟和相关方案来处理多路径的影响，同时交换积分和乘法以增加互相关因子，从而在低SNR条件下提高灵敏度。 相关性被分成多个链以产生多个部分相关性以观察扩展序列中的短模式，导致在长多径信道中的改进的性能。

公开(公告)号：US09184971B2

公开(公告)日：2015-11-10

申请号：US11739094

申请日：2007-04-23

申请人： Gregory Lerner ,  Nir Tal ,  Dan Wolberg ,  Manoneet Singh ,  Yehuda Azenkot

发明人： Gregory Lerner ,  Nir Tal ,  Dan Wolberg ,  Manoneet Singh ,  Yehuda Azenkot

IPC分类号： H04L27/00 ,  H04L27/26 ,  H04L7/04 ,  H04L7/08

CPC分类号： H04L27/2656 ,  H04L7/042 ,  H04L7/08 ,  H04L27/2657 ,  H04L27/2679 ,  H04L2027/0046 ,  H04L2027/0065

摘要： A novel and useful apparatus for and method of packet detection and carrier frequency offset estimation. The packet detection mechanism is robust to channels and sustains reasonable miss-detect (and false alarm) rates at low SNR values. The mechanism uses a modified combined cross correlation and delay and correlate scheme. A delay and correlate scheme is used in order to handle the effects of multipath while swapping integration and multiplication to increase cross-correlation factors resulting in improved sensitivity in low SNR conditions. Correlation is divided into multiple chains to generate a plurality of partial correlations to observe short patterns in the spread sequence resulting in improved performance in long multipath channels.

摘要翻译： 一种新颖有用的分组检测和载波频率偏移估计方法及方法。 分组检测机制对信道是鲁棒的，并且在低SNR值下维持合理的错误检测（和误报）速率。 该机制采用改进的组合互相关和延迟和相关方案。 使用延迟和相关方案来处理多路径的影响，同时交换积分和乘法以增加互相关因子，从而在低SNR条件下提高灵敏度。 相关性被分成多个链以产生多个部分相关性以观察扩展序列中的短模式，导致在长多径信道中的改进的性能。

公开(公告)号：US20080043813A1

公开(公告)日：2008-02-21

申请号：US11731932

申请日：2007-04-02

申请人： Yehuda Azenkot ,  Manoneet Singh ,  William L. Abbott

发明人： Yehuda Azenkot ,  Manoneet Singh ,  William L. Abbott

IPC分类号： H04B1/713

CPC分类号： H04B1/71632 ,  H04B1/7143 ,  H04B1/719 ,  H04W72/04 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/40

摘要： A system and method of flexible channel allocation in an ultra wideband frequency hopping communication system is disclosed. In one embodiment, a method includes communicating radio signals through rapidly switching among a band group 6 according to a hopping pattern. The method also includes scanning the ultra wideband spectra to determine the band group 6 based on the hopping pattern of the radio signals.In another embodiment, a method includes scanning ultra wideband spectra to eliminate any frequency band of the ultra wideband spectra from a list of available frequency bands when the any frequency band is currently used, selecting a band group in combination of two or more frequency bands to communicate radio signals with an optimal transmission power and/or maximum range, and communicating the radio signals through rapidly switching among the band group.

摘要翻译： 公开了一种在超宽带跳频通信系统中灵活的信道分配的系统和方法。 在一个实施例中，一种方法包括通过根据跳频图案在频带组6之间快速切换来传送无线电信号。 该方法还包括扫描超宽带频谱以基于无线电信号的跳频模式来确定频带组6。 在另一个实施例中，一种方法包括扫描超宽带频谱以从当前使用的任何频带的可用频带的列表中消除超宽带频谱的任何频带，选择两个或多个频带组合的频带组 以最佳发射功率和/或最大范围传送无线电信号，并通过频带组之间的快速切换来传送无线电信号。

公开(公告)号：US07825740B2

公开(公告)日：2010-11-02

申请号：US12260273

申请日：2008-10-29

申请人： Yehuda Azenkot ,  Michael E. Wilhoyte ,  Manoneet Singh

发明人： Yehuda Azenkot ,  Michael E. Wilhoyte ,  Manoneet Singh

IPC分类号： H03L7/093 ,  H03L7/07

CPC分类号： H03J1/0008 ,  H04B1/7183

摘要： In at least some embodiments, a communication system includes a receiver having a local oscillator (LO) for each of a plurality of frequency bands. Each LO is controlled by a separate phase-locked loop (PLL) that tracks carrier frequency offset (CFO) using a common phase error (CPE). The CPE is selectively weighted based on at least one inter-band frequency correlation (IFC) coefficient.

摘要翻译： 在至少一些实施例中，通信系统包括具有用于多个频带中的每一个的本地振荡器（LO）的接收机。 每个LO由使用公共相位误差（CPE）跟踪载波频率偏移（CFO）的单独的锁相环（PLL）控制。 基于至少一个频带间频率相关（IFC）系数选择性地加权CPE。

公开(公告)号：US08660216B2

公开(公告)日：2014-02-25

申请号：US12909816

申请日：2010-10-21

申请人： Yehuda Azenkot ,  Zvi Bernstein

发明人： Yehuda Azenkot ,  Zvi Bernstein

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H03L7/0807 ,  H03L2207/50 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/024 ,  H04L25/03159 ,  H04L27/2613 ,  H04L27/266 ,  H04L27/2675 ,  H04L27/2695 ,  H04L2025/03414

摘要： A CFO tracking loop module comprises: a numerically-controlled oscillator (NCO) that calculates a phase output; a CFO phase error block that generates a corrected NCO phase output by subtracting half of residual CFO phase error from the NCO phase output; a multiplier that corrects pilot subcarrier's phase by multiplying complex values of the pilot subcarriers by a conjugated complex value of the corrected NCO phase output; a pilot processor that generates a phase error by averaging phases over pilot subcarriers; and a loop filter that filters phase error from the pilot processor and updates the NCO with the filtered phase error.

摘要翻译： CFO跟踪环模块包括：计算相位输出的数控振荡器（NCO）; CFO相位误差块，通过从NCO相输出中减去残留CFO相位误差的一半来产生校正的NCO相位输出; 乘法器，通过将导频子载波的复数乘以校正的NCO相位输出的共轭复数值来校正导频子载波相位; 导频处理器，通过导频副载波平均相位产生相位误差; 以及一个环路滤波器，用于对来自导频处理器的相位误差进行滤波，并用滤波相位误差更新NCO。

公开(公告)号：US08446987B2

公开(公告)日：2013-05-21

申请号：US12286337

申请日：2008-09-29

申请人： Yehuda Azenkot ,  Selim Shlomo Rakib

发明人： Yehuda Azenkot ,  Selim Shlomo Rakib

IPC分类号： H04L27/06

CPC分类号： H04L5/12 ,  H04L5/02 ,  H04L27/34

摘要： A headend transmitter that transmits 1024 QAM including a 256 QAM modulator which has been modified to have more aggressive forward error correction processing. The 256 QAM modulator outputs 256 QAM points to a summer. Another data modulator receives additional data to be transmitted in a separate, substantially less complex constellation. This modulator processes the additional data to do forward error correction thereon and then maps the encoded data into a less complex constellation such as QPSK, 16 QAM etc. The additional data constellation points are then amplified in a variable gain amplifier and fed to a summer where each additional data point is added by vector summation to one 256 QAM point. The output 1024 QAM point is filtered and shifted to the desired transmission frequency. Legacy cable modem receivers can still receive the 256 QAM point since the addition of the new data just appears to be noise which they can overcome using the parity bits encoded in the transmitted symbols. 1024 QAM cable modem receivers receive both the 256 QAM points and the new data points and output both.

公开(公告)号：US20120051238A1

公开(公告)日：2012-03-01

申请号：US13152279

申请日：2011-06-03

申请人： Yehuda Azenkot ,  Zvi Bernstein

发明人： Yehuda Azenkot ,  Zvi Bernstein

IPC分类号： H04L12/26

CPC分类号： H04L27/0012 ,  H04B3/02 ,  H04L43/08 ,  H04L43/0847 ,  H04L43/0888 ,  H04L47/28

摘要： A method in a first node of a network comprises computing a packet duration when using a first unicast profile with a first type preamble and a packet duration when using a second unicast profile with a second type preamble; comparing the computed packet durations so as to determine one from the first and second unicast profiles which yields a shorter duration; and sending the packet to a second node by using the determined unicast profile.

摘要翻译： 网络的第一节点中的方法包括当使用具有第一类型前导码的第一单播简档和当使用具有第二类型前同步码的第二单播简档时的分组持续时间来计算分组持续时间; 比较所计算的分组持续时间，从而确定来自所述第一和第二单播简档中的一个，其产生较短的持续时间; 以及通过使用所确定的单播简档来将所述分组发送到第二节点。

公开(公告)号：US20110310999A1

公开(公告)日：2011-12-22

申请号：US12819813

申请日：2010-06-21

申请人： William L. Abbott ,  Yehuda Azenkot

发明人： William L. Abbott ,  Yehuda Azenkot

IPC分类号： H04L27/06

CPC分类号： H04L27/2605 ,  H04L25/0204 ,  H04L25/0216 ,  H04L27/2647 ,  H04L27/2662

摘要： A method of performing overlap-and-add length for zero-padded suffixes. The method includes derotating received information symbol samples. The derotated received information symbol samples include a first set of derotated received information symbol samples and a second set of derotated received information symbol samples. The first set of derotated received information symbol samples are stored in a buffer. The second set of derotated received information symbol samples are provided to a received sample processing unit. The received zero-padded suffix samples are deroted. Based upon an overlap-and-add length, at least a fraction of the derotated received zero-padded suffix samples is added with at least a fraction of the first set of derotated received information symbol samples to produce multiple summed samples. The multiple summed samples is provided to the received sample processing unit.

摘要翻译： 对零填充后缀执行重叠和添加长度的方法。 该方法包括消除收到的信息符号样本。 解旋转的接收信息符号样本包括第一组解旋的接收信息符号样本和第二组解旋转的接收信息符号样本。 第一组解码的接收信息符号样本存储在缓冲器中。 第二组解旋接收信息符号样本被提供给接收的采样处理单元。 收到的零填充后缀样本被推翻。 基于重叠和加法长度，至少部分被解码的接收零填充后缀样本与第一组解旋后的接收信息符号样本的至少一部分相加以产生多个相加样本。 将多个相加样本提供给接收到的采样处理单元。