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公开(公告)号：US07190740B2
公开(公告)日：2007-03-13
申请号：US10224047
申请日：2002-08-19
IPC分类号： H04L25/06
CPC分类号： H04L25/067 , H04L25/03305
摘要： A DC tracking arrangement includes a first tracking unit for slow tracking receiving an input signal and generating a first output signal, a second tracking unit for fast tracking receiving the input signal and generating a second output signal, and a decision unit receiving the first and second output signal for selecting the first or second output signal.
摘要翻译： DC跟踪装置包括用于慢跟踪接收输入信号并产生第一输出信号的第一跟踪单元，用于快速跟踪接收输入信号并产生第二输出信号的第二跟踪单元，以及接收第一和第二信号的判定单元 用于选择第一或第二输出信号的输出信号。
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公开(公告)号：US07092438B2
公开(公告)日：2006-08-15
申请号：US10057466
申请日：2002-01-22
CPC分类号： H04L25/03178 , H04L25/03057
摘要： A method of processing a sequence of digital symbols comprises the steps of processing the sequence of digital symbols and determining an uncertainty in the processing. If the uncertainty exceeds a predetermined threshold, then the method further comprises the steps of processing at least two sequences of digital symbols wherein at least one parameter is set differently in each sequence, and deciding upon a calculated error for each sequence which sequence is used to generate an output signal.
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公开(公告)号：US07039093B2
公开(公告)日：2006-05-02
申请号：US10173463
申请日：2002-06-14
IPC分类号： H04B1/69
CPC分类号： H04L27/00
摘要： A digital signal detector arrangement comprises at least two selectable baseband filters for receiving a digital signal, a signal estimator receiving the output signal of the selected baseband filter, a modulator unit receiving the estimated signal from the signal estimator, a subtractor for subtracting the modulated signal from the received digital signal, and a determination unit receiving the signal from the subtractor for selecting the baseband filter.
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公开(公告)号：US07558343B2
公开(公告)日：2009-07-07
申请号：US09990844
申请日：2001-11-21
CPC分类号： H04L25/03203 , H04L25/03235 , H04L2025/03401 , H04L2025/03726
摘要： A tap-selectable Viterbi equalizer comprises means for determining at least one symbol from a previous determination assigned to a first state, means for determining a second state of the plurality of states and determining a surviving path metric by comparing path metrics originating from the determined symbol, means for determining the value of a previous symbol with respect to the symbol of the surviving state, and calculating means for generating a reduced trellis by calculating only path metrics for states in which the previous symbol has the determined value.
摘要翻译： 抽头可选维特比均衡器包括用于从分配给第一状态的先前确定中确定至少一个符号的装置，用于确定多个状态的第二状态的装置，以及通过比较源自所确定的符号的路径度量来确定幸存路径度量 ，用于确定相对于所述幸存状态的符号的先前符号的值的装置，以及用于通过仅计算所述先前符号具有所述确定值的状态的路径度量来生成缩小网格的计算装置。
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公开(公告)号：US06751775B2
公开(公告)日：2004-06-15
申请号：US09990633
申请日：2001-11-21
IPC分类号： H03M1303
CPC分类号： H03M13/6331 , H03M13/3955 , H03M13/3961 , H03M13/41 , H03M13/6502
摘要： A method of determining a trellis from a sequence of n symbols in a Viterbi detector. The method includes the steps of receiving a sequence of n symbols, defining partitioned sets according to a decision tree structure, and determining size of each set partitioning according to tap energy of the channel. The method also includes steps of determining a reduced set of connection paths between the current layer and a destination layer in the trellis by determining a value of a most likely oldest partitioned set in a current layer; and calculating branch metrics only for the current layers in the trellis in which the oldest partitioned set matches the determined value.
摘要翻译： 一种从维特比检测器中的n个符号的序列确定网格的方法。 该方法包括以下步骤：接收n个符号的序列，根据决策树结构定义分割集，以及根据信道的抽头能量确定每个集合分割的大小。 该方法还包括以下步骤：通过确定当前层中最可能最旧的分区集合的值来确定网格中当前层和目的地层之间的连接路径的简化集合; 并且仅计算最旧分区集合与确定的值匹配的网格中的当前层的分支度量。
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公开(公告)号：US07269234B2
公开(公告)日：2007-09-11
申请号：US10173447
申请日：2002-06-14
IPC分类号： H04L27/06
CPC分类号： H04L25/062
摘要： A digital arrangement for selecting a channel coefficient and DC estimate comprises a demultiplexer receiving a digital input signal splitting the digital input signal into a first and second signal, a first joint detection unit receiving the first signal generating a first channel coefficient and DC estimate, a second joint detection unit receiving the second signal generating a second channel coefficient and DC estimate, a first and second error determination unit receiving the first and second channel coefficients and DC estimates, respectively for generating a first and second error signal, a decision unit receiving the first and second error signals generating a control signal, and a selection unit controlled by the control signal for selecting the first or second channel coefficient and DC estimate.
摘要翻译： 用于选择信道系数和DC估计的数字装置包括：解复用器，接收将数字输入信号分割成第一和第二信号的数字输入信号;接收产生第一信道系数和DC估计的第一信号的第一联合检测单元， 第二联合检测单元，接收产生第二信道系数和DC估计的第二信号;第一和第二误差确定单元，分别接收第一和第二信道系数和DC估计，用于产生第一和第二误差信号;判决单元， 产生控制信号的第一和第二误差信号，以及由用于选择第一或第二信道系数和DC估计的控制信号控制的选择单元。
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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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公开(公告)号：US20130279548A1
公开(公告)日：2013-10-24
申请号：US13452743
申请日：2012-04-20
CPC分类号： H04L27/2078 , H04L25/03834 , H04L27/227
摘要： A variation on conventional DPSK binary modulation schemes is provided. One modulation scheme uses 3π/8 differential binary phase shift keying (3π/8-DBPSK) where one symbol is transmitted by phase change of 3π/8 radians and the other symbol is transmitted by phase change of −5π/8 radians. Alternatively, this can be thought of as adding a constant 3π/8 radians to the symbol angle for every bit modulated by conventional DBPSK. In another example, assume a first and second symbols, k−1 and k, respectively, are sent. Where k is the same symbol as k−1, a phase rotation of 3π/8 radians from the kth symbol is used to represent the symbol at k−1; and where the k−1 symbol is the opposite of the kth symbol, its rotation 11π/8 radians from the kth symbol. Other modulation schemes using other phase rotations can be provided.
摘要翻译： 提供了常规DPSK二进制调制方案的变体。 一个调制方案使用3pi / 8差分二进制相移键控（3pi / 8-DBPSK），其中一个符号通过3pi / 8弧度的相位变化传输，另一个符号通过-5pi / 8弧度的相位变化传输。 或者，这可以被认为是对于由常规DBPSK调制的每个位的符号角添加常量3pi / 8弧度。 在另一示例中，假设分别发送第一和第二符号k-1和k。 其中k是与k-1相同的符号，使用从第k个符号的3pi / 8弧度的相位旋转来表示k-1处的符号; 并且其中k-1符号与第k个符号相反，其旋转11pi / 8从第k个符号弧度。 可以提供使用其他相位旋转的其他调制方案。
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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：US20080285682A1
公开(公告)日：2008-11-20
申请号：US12101900
申请日：2008-04-11
申请人： Lichung Chu , Kiyoyuki Ihara , Kenji Kamitani , Fumitaka Iizuka
发明人： Lichung Chu , Kiyoyuki Ihara , Kenji Kamitani , Fumitaka Iizuka
IPC分类号： H04L27/36
CPC分类号： H04L27/364 , H04L2027/0016
摘要： A calibration apparatus for a quadrature modulation system with a quadrature modulation compensator and a logarithmic envelop detector, wherein a parameter update of the quadrature modulation compensator is derived by utilizing a transformed offset value and a transformed gain value of the logarithmic envelop detector as intermediate parameters, and the transformed offset and the transformed gain parameters are used in a training sequence of the quadrature modulation compensator.
摘要翻译： 一种用于具有正交调制补偿器和对数包络检测器的正交调制系统的校准装置，其中通过利用对数包络检测器的变换偏移值和变换增益值作为中间参数导出正交调制补偿器的参数更新， 并且变换的偏移和变换的增益参数在正交调制补偿器的训练序列中使用。
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