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公开(公告)号：US06628697B1
公开(公告)日：2003-09-30
申请号：US09422832
申请日：1999-10-21
IPC分类号： H04L2730
CPC分类号： H04J3/0682 , H04L7/027 , H04L27/2613 , H04L27/2655 , H04W56/0085
摘要： A chirp waveform is employed in establishing timing synchronization between nodes of a data communication network. In one embodiment, the chirp waveform is combined with a waveform modulated with data to form a synchronization waveform. The receiver of the synchronization waveform determines an alignment of the chirp waveform to a template chirp waveform to synchronize timing between nodes.
摘要翻译： 在建立数据通信网络的节点之间的定时同步时采用啁啾波形。 在一个实施例中，啁啾波形与用数据调制的波形组合以形成同步波形。 同步波形的接收器确定线性调频波形与模板啁啾波形的对准，以同步节点之间的定时。
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2.发明授权公开(公告)号：US08693450B2
公开(公告)日：2014-04-08
申请号：US12802375
申请日：2010-06-04
IPC分类号： H04W4/00
摘要： In one embodiment, different physical layer standards are segregated into different frequency channels. In one implementation, 802.11b traffic and 802.11g traffic are segregated into different frequency channels. A network management tool allows the user to specify channels to either, e.g., 802.11b-only, 802.11g-only, 802.11b preferred and 802.11g discouraged, or 802.11g preferred and 802.11b discouraged. Access points are given the capability of preventing or discouraging client traffic of either given type.
摘要翻译： 在一个实施例中，将不同的物理层标准分离成不同的频率信道。 在一个实现中，将802.11b业务和802.11g业务分离到不同的频率信道中。 网络管理工具允许用户指定信道，例如仅限于802.11b，仅802.11g，802.11b优先，802.11g不鼓励，或802.11g优先和802.11b不鼓励。 接入点具有防止或阻止任一给定类型的客户端流量的能力。
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公开(公告)号：US08140104B2
公开(公告)日：2012-03-20
申请号：US12322005
申请日：2009-01-27
申请人： Bretton Douglas , Timothy Olson
发明人： Bretton Douglas , Timothy Olson
IPC分类号： H04B7/00
CPC分类号： H04W16/18
摘要： A search algorithm to find a globally optimal radio plan for a wireless network, including assignments of frequency and transmission power to multiple access points. Two different evaluation metrics are used in order to provide an optimal solution in a reasonable time period. Frequency searches are performed using a special rapid evaluation metric. Transmission powers are selected using a more refined metric that estimates data throughput. The search results are deterministic and execution time is also substantially deterministic.
摘要翻译： 一种搜索算法，用于找到无线网络的全局最佳无线电规划，包括对多个接入点的频率和发射功率的分配。 使用两种不同的评估指标，以便在合理的时间段内提供最佳解决方案。 使用特殊的快速评估指标执行频率搜索。 使用估计数据吞吐量的更精细的度量来选择传输功率。 搜索结果是确定性的，执行时间也是确定性的。
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公开(公告)号：US20090067403A1
公开(公告)日：2009-03-12
申请号：US12165717
申请日：2008-07-01
申请人： Douglas Chan , Brian Donald Hart , Bretton Douglas
发明人： Douglas Chan , Brian Donald Hart , Bretton Douglas
CPC分类号： H04W16/10 , H04W16/14 , H04W72/082
摘要： Techniques are provided for selecting channels for a wider bandwidth operation mode of a wireless network, such as wireless network that operates in accordance with the IEEE 802.11n amendment. Alignments of so-called primary and secondary channels are selected to mitigate interference. Interfering sources, such as other transceivers or external interferers, or the energy from their transmissions, are identified and channels are selected. The selected channels are analyzed to determine whether primary-secondary channel assignments for the selected channels are feasible.
摘要翻译： 提供技术用于选择无线网络的更宽带宽操作模式的信道，诸如根据IEEE 802.11n修正操作的无线网络。 选择所谓的主通道和辅助通道的对准以减轻干扰。 识别干扰源，例如其他收发器或外部干扰源，或来自其传输的能量，并选择通道。 分析所选择的频道以确定所选频道的主要次要信道分配是否可行。
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公开(公告)号：US20080232256A1
公开(公告)日：2008-09-25
申请号：US11688982
申请日：2007-03-21
申请人： Bretton Douglas , Brian Hart
发明人： Bretton Douglas , Brian Hart
CPC分类号： H04Q3/66 , H04L45/00 , H04L45/38 , H04W16/18 , H04W40/04 , H04W40/246 , Y02D70/00 , Y02D70/142 , Y02D70/22 , Y02D70/32
摘要： In an example embodiment, a number of contending nodes and colliding nodes for a plurality of links of a network is determined. The capacity of each of the plurality of links is determined. A sum of the traffic demand of each of the plurality of links divided the throughput of each of the plurality of links is used to form a cost function for the network. One, or more, of a group consisting of a plurality of frequency assignments, a plurality of transmit powers, and a plurality of clear channel assessment (CCA) values is searched to obtain a global minimum for the cost function. The frequency assignments, transmit powers, and/or CCA values providing the global minimum for the cost function are selected.
摘要翻译： 在示例实施例中，确定了用于网络的多个链路的多个竞争节点和冲突节点。 确定多个链接中的每一个的容量。 使用将多个链路中的每一个链路的吞吐量除以多个链路中的每一个的流量需求的总和来形成网络的成本函数。 搜索由多个频率分配，多个发射功率和多个清除信道评估（CCA）值组成的组中的一个或多个，以获得成本函数的全局最小值。 选择提供成本函数的全局最小值的频率分配，发射功率和/或CCA值。
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公开(公告)号：US07391368B1
公开(公告)日：2008-06-24
申请号：US11682649
申请日：2007-03-06
申请人： Zhigang Gao , Paul Stager , Bretton Douglas , Brian Hart , James Amos , Yoonill Lee
发明人： Zhigang Gao , Paul Stager , Bretton Douglas , Brian Hart , James Amos , Yoonill Lee
IPC分类号： G01S1/24
CPC分类号： G01S5/0215 , G01S5/0221
摘要： In an example embodiment, a time of arrival circuit coupled to a wireless transceiver configured to determine a time of arrival of a wireless signal. The time of arrival circuit is operative to perform a coarse-scale frequency domain correlation of the actual samples with a predetermined ideal sample. The time of arrival circuit determines a maximum coarse correlation coefficient. The time delay circuit is operative to determine a plurality of fine correlation coefficients by interpolating around the peak coarse correlation coefficient. The time of arrival circuit determines a maximum correlation coefficient from the plurality of fine correlation coefficients and a time delay associated with the maximum correlation coefficient, the time of arrival is based on the time delay associated with the maximum correlation coefficient.
摘要翻译： 在示例实施例中，耦合到无线收发器的到达电路被配置为确定无线信号的到达时间。 到达时间电路用于执行实际样品与预定理想样品的粗尺度频域相关。 到达时间电路确定最大粗相关系数。 时间延迟电路用于通过围绕峰值粗相关系数进行内插来确定多个精细相关系数。 到达电路确定来自多个精细相关系数的最大相关系数和与最大相关系数相关联的时间延迟，到达时间基于与最大相关系数相关联的时间延迟。
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公开(公告)号：US07352718B1
公开(公告)日：2008-04-01
申请号：US10624653
申请日：2003-07-22
CPC分类号： H04L65/601 , H04B7/0413 , H04B7/10 , H04L1/0083 , H04L1/1607 , H04L1/1854 , H04L2001/0093 , H04W16/28 , H04W52/04 , H04W72/0406 , H04W88/10
摘要： Multiple Input Multiple Output (MIMO) technology in conjunction with the IEEE 802.11 standard enables simultaneous communication of data packets to or from multiple users in the same frequency. Spatial divisional multiple access (SDMA) is thus provided. In this way, system capacity can be increased to an extent that depends on available antenna resources and the multipath characteristics of the communication channel. Doubling or quadrupling of network throughput can be achieved.
摘要翻译： 结合IEEE 802.11标准的多输入多输出（MIMO）技术可以实现与同一频率的多个用户的数据包同时通信。 因此提供了空分多址（SDMA）。 以这种方式，可以将系统容量增加到取决于可用天线资源和通信信道的多径特性的程度。 可以实现网络吞吐量的两倍或四倍。
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公开(公告)号：US20050190732A1
公开(公告)日：2005-09-01
申请号：US10791466
申请日：2004-03-01
申请人： Bretton Douglas , Timothy Olson
发明人： Bretton Douglas , Timothy Olson
CPC分类号： H04W24/00 , H04L41/06 , H04L41/0896 , H04L43/0829 , H04L43/0882 , H04W24/10 , H04W28/22
摘要： Systems and methods for evaluating wireless network quality. A metric provided by embodiments of the present invention relies on information that is relatively easy to collect, can be very efficiently computed, and yet provides a realistic estimate of likely wireless network performance. In one implementation, the input includes path loss data and access point transmitter power level and frequency settings. A capacity indicator is computed for each client and each access point. A data rate indicator is computed for each client location. The traffic load is computed for each access point. Based on these computed indicators, a bidirectional client throughput can be computed for each client and a combined metric can be determined for the network as a whole.
摘要翻译： 评估无线网络质量的系统和方法。 由本发明的实施例提供的度量取决于相对容易收集的信息，可以被非常有效地计算，并提供可能的无线网络性能的现实估计。 在一个实现中，输入包括路径损耗数据和接入点发射机功率电平和频率设置。 为每个客户端和每个接入点计算容量指标。 为每个客户端位置计算一个数据速率指示符。 为每个接入点计算流量负载。 基于这些计算的指标，可以为每个客户端计算双向客户端吞吐量，并且可以为整个网络确定组合度量。
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公开(公告)号：US08374105B1
公开(公告)日：2013-02-12
申请号：US12011546
申请日：2008-01-28
申请人： Eldad Perahia , Bretton Douglas , David Pignatelli
发明人： Eldad Perahia , Bretton Douglas , David Pignatelli
CPC分类号： H04L27/2655 , H04B7/0413 , H04B7/10 , H04L5/0023 , H04L5/0048 , H04L25/0202 , H04L25/0226
摘要： A specialized preamble is provided to facilitate matrix channel estimation of a MIMO channel. In a particular implementation, a channel training preamble provided by the IEEE 802.11a standard is modified to facilitate MIMO channel estimation.
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公开(公告)号：US08369657B2
公开(公告)日：2013-02-05
申请号：US13412717
申请日：2012-03-06
申请人： Douglas Chan , Brian Donald Hart , Bretton Douglas
发明人： Douglas Chan , Brian Donald Hart , Bretton Douglas
CPC分类号： H04W16/10 , H04W16/14 , H04W72/082
摘要： Techniques are provided for selecting channels for a wider bandwidth operation mode of a wireless network, such as wireless network that operates in accordance with the IEEE 802.11n amendment. Alignments of so-called primary and secondary channels are selected to mitigate interference. Interfering sources, such as other transceivers or external interferers, or the energy from their transmissions, are identified and channels are selected. The selected channels are analyzed to determine whether primary-secondary channel assignments for the selected channels are feasible.
摘要翻译： 提供技术用于选择无线网络的更宽带宽操作模式的信道，诸如根据IEEE 802.11n修正操作的无线网络。 选择所谓的主通道和辅助通道的对准以减轻干扰。 识别干扰源，例如其他收发器或外部干扰源，或来自其传输的能量，并选择通道。 分析所选择的频道以确定所选频道的主要次要信道分配是否可行。
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