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公开(公告)号：US08761307B1
公开(公告)日：2014-06-24
申请号：US13156105
申请日：2011-06-08
CPC分类号： H04L1/0057 , H04L1/0045 , H04L1/0071
摘要： A communications device and receiver system and method to efficiently distribute functions among radio frequency (RF), analog front end (AFE) and baseband modules for ultra-low power consumption comprising a wideband receiver subsystem selectively coupled to a signal input receiving a first frequency band, a narrowband received subsystem selectively coupled to the signal input receiving a second frequency band and, a controller configured to monitor the first frequency band using the first receiver subsystem and if a wake up signal is detected using the first receiver subsystem, connect the second receiver subsystem to the signal input and tune the second receiver subsystem to a channel transmitting the wake up signal, the wake up signal including channel selection information defining the channel for subsequent communications. Wherein, the two frequency bands overlap and center on different frequencies.
摘要翻译： 一种用于在射频（RF），模拟前端（AFE）和用于超低功耗的基带模块之间有效分配功能的通信设备和接收机系统和方法，包括：宽带接收机子系统，其选择性地耦合到接收第一频带的信号输入 选择性地耦合到接收第二频带的信号输入的窄带接收子系统，以及配置成使用第一接收机子系统监视第一频带并且如果使用第一接收机子系统检测到唤醒信号的控制器，则将第二接收机 子系统到信号输入，并将第二接收机子系统调谐到发送唤醒信号的信道，唤醒信号包括定义用于随后通信的信道的信道选择信息。 其中两个频带在不同频率上重叠并居中。
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公开(公告)号：US08576961B1
公开(公告)日：2013-11-05
申请号：US12484893
申请日：2009-06-15
IPC分类号： H04L27/06
CPC分类号： H04L27/2656 , H04L25/0224 , H04L27/2663 , H04L27/2665 , H04L27/2695
摘要： A method for determining an overlap and add length estimate comprises determining a plurality of correlation values of a plurality of ordered frequency domain samples obtained from a data frame; comparing the correlation values of a first subset of the samples to a first predetermined threshold to determine a first edge sample; comparing the correlation values of a second subset of the samples to a second predetermined threshold to determine a second edge sample; using the first and second edge samples to determine an overlap and add length estimate; and providing the overlap and add length estimate to an overlap and add circuit.
摘要翻译： 一种用于确定重叠和加法长度估计的方法包括确定从数据帧获得的多个有序频域样本的多个相关值; 将样本的第一子集的相关值与第一预定阈值进行比较，以确定第一边缘样本; 将样本的第二子集的相关值与第二预定阈值进行比较，以确定第二边缘样本; 使用第一和第二边缘样本来确定重叠和加法长度估计; 并将重叠和加法长度估计提供给重叠和加法电路。
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公开(公告)号：US08345783B1
公开(公告)日：2013-01-01
申请号：US13077968
申请日：2011-03-31
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Phase tracking in an OFDM symbol comprises determining a sufficient statistic for CFO and SFO estimation from a differential metric between a current OFDM symbol and a previous OFDM symbol transmitted on the same frequency band. The sufficient statistics corresponding to positive pilot tones are combined with those corresponding to negative pilot tones to estimate the CFO and SFO.
摘要翻译： OFDM符号中的相位跟踪包括从当前OFDM符号和在相同频带上发送的先前OFDM符号之间的差分度量确定用于CFO和SFO估计的足够的统计量。 与正导频音相对应的足够的统计量与与负导频音相对应的统计量结合起来来估计CFO和SFO。
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公开(公告)号：US20120307839A1
公开(公告)日：2012-12-06
申请号：US13149727
申请日：2011-05-31
IPC分类号： H04L12/28
CPC分类号： H04L5/0033 , A61N1/3727 , A61N1/3956 , H04W84/20
摘要： A master device selects a channel from a band of channels for communications with a slave device. The master transmits information identifying the selected to the slave device using a packet modulated as a series of energy pulses on the selected channel. The slave device performs wideband energy detection on the band of channels and receives the modulated pulses. The slave device decodes the modulated pulses to retrieve the selected channel, and tunes to the selected channel for further communications.
摘要翻译： 主设备从用于与从设备通信的信道频带中选择一个信道。 主设备使用在所选择的信道上作为一系列能量脉冲调制的分组来将识别所选择的信息发送到从设备。 从设备对信道频带进行宽带能量检测，并接收调制脉冲。 从设备对调制的脉冲进行解码以检索所选择的信道，并调谐到所选择的信道用于进一步的通信。
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公开(公告)号：US09135208B1
公开(公告)日：2015-09-15
申请号：US13446586
申请日：2012-04-13
IPC分类号： G06F15/16
摘要： Systems and methods for group management in machine-to-machine networks are provided. Network nodes in a network group are divided into sub-groups and a group information register, which includes a listing of the nodes in the group, is divided into an equal number of partitions. The partitions are distributed to the sub-groups such that each node in a given sub-group receives the same partition. The partitions are accompanied by references to network nodes of other sub-groups (termed “anchor nodes”) that have a copy of another partition of the group information register. When a new network head takes over the network group, it is able to use the available partitions to determine which partitions are missing and which nodes hold copies of the missing partitions. The group head can wake up the missing nodes and obtain the missing partition copies, thereby generating a complete copy of the group information register.
摘要翻译： 提供了机器到机器网络中的组管理系统和方法。 网络组中的网络节点被划分成子组，并且组信息寄存器（其包括组中的节点的列表）被划分成相等数量的分区。 分区被分配给子组，使得给定子组中的每个节点接收相同的分区。 分区伴随着对具有组信息寄存器的另一分区的副本的其他子组（称为“锚节点”）的网络节点的引用。 当新的网络头接管网络组时，它可以使用可用的分区来确定哪些分区丢失，哪些节点保存丢失的分区的副本。 组头可以唤醒丢失的节点并获取丢失的分区副本，从而生成组信息寄存器的完整副本。
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6.发明授权Methods and systems for computing a minimum variance unbiased estimator of carrier and sampling clock frequency 有权用于计算载波和采样时钟频率的最小方差无偏估计的方法和系统公开(公告)号：US08036290B2
公开(公告)日：2011-10-11
申请号：US12099013
申请日：2008-04-07
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.
摘要翻译： 本文描述的系统和方法的各种实施例可以用于通过以导频音接收第一OFDM信号来计算最小方差无偏估计器，接收在相同频带中发送的第二OFDM信号，并且确定第一 OFDM信号和第二OFDM信号。 在一些实施例中，差分相位度量可用于分集组合同步统计。 在各种实施例中，差分相位度量可用于检测窄带干扰。
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7.发明授权Methods and systems for diversity combining of synchronization statistics in OFDM systems 有权OFDM系统中同步统计分集组合的方法和系统公开(公告)号：US08300720B1
公开(公告)日：2012-10-30
申请号：US13178422
申请日：2011-07-07
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.
摘要翻译： 本文描述的系统和方法的各种实施例可以用于通过以导频音接收第一OFDM信号来计算最小方差无偏估计器，接收在相同频带中发送的第二OFDM信号，并且确定第一 OFDM信号和第二OFDM信号。 在一些实施例中，差分相位度量可用于分集组合同步统计。 在各种实施例中，差分相位度量可用于检测窄带干扰。
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公开(公告)号：US20080247480A1
公开(公告)日：2008-10-09
申请号：US12099002
申请日：2008-04-07
IPC分类号： H04L27/28
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.
摘要翻译： 本文描述的系统和方法的各种实施例可以用于通过以导频音接收第一OFDM信号来计算最小方差无偏估计器，接收在相同频带中发送的第二OFDM信号，并且确定第一 OFDM信号和第二OFDM信号。 在一些实施例中，差分相位度量可用于分集组合同步统计。 在各种实施例中，差分相位度量可以用于检测窄带干扰。
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公开(公告)号：US08422483B2
公开(公告)日：2013-04-16
申请号：US11694575
申请日：2007-03-30
IPC分类号： H04J3/06
CPC分类号： H04L25/0228 , H04L27/2647 , H04L27/2656 , H04L27/2662
摘要： The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more channel estimates or channel observables can be combined to compute a refined channel estimate, for example, when the channel estimates or channel observables are from the same channel.
摘要翻译： 本发明涉及用于诸如例如在无线通信网络中发现的通信信道的信道估计的系统和方法。 可以组合一个或多个信道估计或信道观测值来计算精细信道估计，例如当信道估计或信道可观测量来自相同信道时。
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10.发明授权Methods and systems for diversity combining of synchronization statistics in OFDM systems 有权OFDM系统中同步统计分集组合的方法和系统公开(公告)号：US08031789B2
公开(公告)日：2011-10-04
申请号：US12099017
申请日：2008-04-07
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.
摘要翻译： 本文描述的系统和方法的各种实施例可以用于通过以导频音接收第一OFDM信号来计算最小方差无偏估计器，接收在相同频带中发送的第二OFDM信号，并且确定第一 OFDM信号和第二OFDM信号。 在一些实施例中，差分相位度量可用于分集组合同步统计。 在各种实施例中，差分相位度量可用于检测窄带干扰。
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