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11. 发明授权

US07821915B2 Channel tracking in an OFDM wireless receiver 有权
标题翻译： OFDM无线接收机中的信道跟踪
公开(公告)号：US07821915B2
公开(公告)日：2010-10-26
申请号：US12130368
申请日：2008-05-30
申请人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
发明人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
IPC分类号： H04J11/00
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to track the channel response for subcarriers in an OFDM receiver for a packet of information that includes a known transmitted part. The receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet. The method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision constellation point value that is a post channel correction using a first estimate of the channel response. The method includes: makes a decision using the pre-decision constellation point value, re-modulates the decision to form a post-decision constellation point value, and forms a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values. This complex valued product forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译：一种用于跟踪OFDM接收机中用于包括已知传输部分的信息分组的子载波的信道响应的装置和方法。接收机具有信号到音调的变压器来确定与接收的分组相对应的子载波。该方法存储子载波的信道响应的初始估计的函数，并且接收使用信道响应的第一估计的作为后信道校正的预决策星座点值。该方法包括：使用预决策星座点值进行判定，重新调制决策以形成后决策星座点值，并形成子载波和复合体的第一估计函数的复值乘积估价和决策后价值的比值。该复值产品形成用于更新存储数量的当前通道估计值的度量。

12. 发明授权

US07773499B2 Channel estimation in a multicarrier radio receiver 有权
标题翻译：多载波无线电接收机中的信道估计
公开(公告)号：US07773499B2
公开(公告)日：2010-08-10
申请号：US11565745
申请日：2006-12-01
申请人： Brian Hart , John D. O'Sullivan
发明人： Brian Hart , John D. O'Sullivan
IPC分类号： H04B1/10 , H04L27/28 , H04J11/00
CPC分类号： H04L27/2647 , H04L25/0228
摘要： A method and apparatus for estimating channel characteristics in a multicarrier wireless receiver such as an OFDM wireless receiver. The method includes determining a channel estimate for each of a set of subcarriers by receiving multicarrier data as a result of a wireless transmission of data that includes a known signal, wherein the determining uses a part of the received data that corresponds to the known signal. The method further includes smoothing the channel estimates according to a smoothing filter to form smoothed channel estimates. The smoothed channel estimate for a particular subcarrier includes a contribution from the channel estimates of one or more subcarriers nearby the particular subcarrier take advantage of correlation that may exist between the particular subcarrier's channel and the channels of the one or more nearby subcarriers. In one version, the transmitted data includes at least one additional known signal, and each smoothed channel estimate is a smoothed version of the average of sets of channel estimates. In such a version, each set of channel estimates is determined using a respective part of the received data that corresponds to a corresponding one of the known signals.
摘要翻译：用于估计诸如OFDM无线接收机的多载波无线接收机中的信道特性的方法和装置。该方法包括通过作为包括已知信号的数据的无线传输的结果接收多载波数据来确定一组子载波中的每一个的信道估计，其中确定使用与已知信号相对应的接收数据的一部分。该方法还包括根据平滑滤波器平滑信道估计以形成平滑信道估计。对于特定子载波的平滑信道估计包括来自特定子载波附近的一个或多个子载波的信道估计的贡献利用可能存在于特定子载波信道和一个或多个附近子载波的信道之间的相关性。在一个版本中，传输的数据包括至少一个附加的已知信号，并且每个平滑的信道估计是信道估计的平均值的平滑版本。在这样的版本中，使用对应于已知信号中的相应一个的接收数据的相应部分来确定每组信道估计。

13. 发明申请

US20080232497A1 CHANNEL TRACKING IN AN OFDM WIRELESS RECEIVER 有权
标题翻译： OFDM无线接收机中的信道跟踪
公开(公告)号：US20080232497A1
公开(公告)日：2008-09-25
申请号：US12130368
申请日：2008-05-30
申请人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C.P. Dankoski
发明人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C.P. Dankoski
IPC分类号： H04L27/28 , H03D1/04
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to track the channel response for subcarriers in an OFDM receiver for a packet of information that includes a known transmitted part. The receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet. The method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision constellation point value that is a post channel correction using a first estimate of the channel response. The method includes: makes a decision using the pre-decision constellation point value, re-modulates the decision to form a post-decision constellation point value, and forms a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values. This complex valued product forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译：一种用于跟踪OFDM接收机中用于包括已知传输部分的信息分组的子载波的信道响应的装置和方法。接收机具有信号到音调的变压器来确定与接收的分组相对应的子载波。该方法存储子载波的信道响应的初始估计的函数，并且接收使用信道响应的第一估计的作为后信道校正的预决策星座点值。该方法包括：使用预决策星座点值进行判定，重新调制决策以形成后决策星座点值，并形成子载波和复合体的第一估计函数的复值乘积估价和决策后价值的比值。该复值产品形成用于更新存储数量的当前通道估计值的度量。

14. 发明授权

US07397758B1 Channel tracking in a OFDM wireless receiver 有权
标题翻译： OFDM无线接收机中的信道跟踪
公开(公告)号：US07397758B1
公开(公告)日：2008-07-08
申请号：US10807547
申请日：2004-03-22
申请人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
发明人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
IPC分类号： H04J11/00 , H04J1/00
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to estimate the channel response for a set of subcarriers in an OFDM receiver. The receiver receives a packet of information that includes a known transmitted part having known subcarrier values, and includes a signal-to-tone transformer to determine the subcarriers of a signal corresponding to a received packet. For each subcarrier, the method stores a function of an initial estimate of the channel response for the subcarrier, and accepts a post-channel correction pre-decision constellation point value for the subcarrier. The method further includes making a decision using the pre-decision constellation point value, re-modulating the decision to form a post-decision constellation point value, and forming a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values to forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译：一种用于估计OFDM接收机中的一组子载波的信道响应的装置和方法。接收机接收包括具有已知子载波值的已知发射部分的信息分组，并且包括信号到音调变换器以确定与接收到的分组相对应的信号的子载波。对于每个子载波，该方法存储子载波的信道响应的初始估计的函数，并且接收用于子载波的信道后校正预决定星座点值。该方法还包括使用预决定星座点值进行判定，重新调制决定以形成后决定星座点值，以及形成子载波和复合物的第一估计的函数的复值乘积预判定值和后决定值的估值比率，以形成用于更新存储数量的当前信道估计值的度量。

15. 发明申请

US20080039119A1 RADIOLOCATION IN A WIRELESS NETWORK USING TIME DIFFERENCE OF ARRIVAL 有权
标题翻译：使用时间差异的无线网络中的放射性
公开(公告)号：US20080039119A1
公开(公告)日：2008-02-14
申请号：US11874835
申请日：2007-10-18
申请人： Jason Crawford , John O'Sullivan , Brian Hart
发明人： Jason Crawford , John O'Sullivan , Brian Hart
IPC分类号： H04Q7/20
CPC分类号： G01S5/0289 , G01S5/021
摘要： A method and an apparatus for radiolocation using time differences of arrival. The method includes receiving transmit timestamps from a set of wireless stations of a wireless network. Each station transmits at least once. The transmit timestamp uses a local timestamping clock to indicate when a station transmitted a packet. The method further includes receiving sets of timestamped captured samples from each station that receives one of the transmitted packets. The times of arrival of each packet at each station are determined from the received sets of timestamped captured samples, and, the relative positions of the stations are determined from the determined times of arrival and the received transmit timestamps. The transmitting by the stations is in a round robin manner one station after the other, and several round robins may be used to mutually calibrate local clocks. Also an apparatus for inclusion in a station of a wireless network. The apparatus includes a buffer subsystem and a timestamping subsystem, such that the station can capture and timestamp a set of samples of a received signal, and send the captured timestamped samples to a processing entity for time difference of arrival location determination.
摘要翻译：使用到达时差的无线电定位方法和装置。该方法包括从无线网络的一组无线站接收发送时间戳。每个站至少发送一次。发送时间戳使用本地时间戳来指示电台何时发送数据包。所述方法还包括从接收所发送的分组之一的每个站接收时间戳捕获的采样集。从接收到的时间戳捕获采样集合确定每个分组在每个站的到达时间，并且从确定的到达时间和接收到的发送时间戳确定站的相对位置。台站的发送是一个接一个的循环方式，可以使用几个循环机来相互校准本地时钟。也是用于包括在无线网络的站中的装置。该装置包括缓冲子系统和时间戳子系统，使得该站可以捕获并对时间戳进行一个接收信号的采样，并将所捕获的带时间戳的采样发送到处理实体，用于到达位置确定的时差。

16. 发明授权

US07304969B2 Automatic gain control and low power start-of-packet detection for a wireless LAN receiver 有权
标题翻译：无线LAN接收机的自动增益控制和低功率启动包检测
公开(公告)号：US07304969B2
公开(公告)日：2007-12-04
申请号：US11557728
申请日：2006-11-08
申请人： Philip J. Ryan , Andrew R. Adams , John D. O'Sullivan , Uri Parker , Brian Hart , Grzegorz B. Zyner
发明人： Philip J. Ryan , Andrew R. Adams , John D. O'Sullivan , Uri Parker , Brian Hart , Grzegorz B. Zyner
IPC分类号： H04Q7/00
CPC分类号： H03G3/3078
摘要： A digital AGC system for burst operation, particularly suited for receiving packets in a wireless local area network. One embodiment includes a log detector that provides a signal strength measure, called the received signal strength indication (RSSI) over a wide dynamic range. The AGC system includes estimating the power in a received signal by averaging the log of the signal power. The Start of Packet detection avoids using the radio receiver's main analog to digital converters to preserve power.
摘要翻译：一种用于突发操作的数字AGC系统，特别适用于在无线局域网中接收分组。一个实施例包括在宽动态范围内提供称为接收信号强度指示（RSSI）的信号强度测量的对数检测器。 AGC系统包括通过对信号功率的对数求平均来估计接收信号中的功率。分组检测的开始避免使用无线电接收机的主要模数转换器来保持功率。

17. 发明申请

US20070042716A1 Automatic radio site survey using a robot 有权
标题翻译：使用机器人进行自动无线电现场调查
公开(公告)号：US20070042716A1
公开(公告)日：2007-02-22
申请号：US11208091
申请日：2005-08-19
申请人： David Goodall , Brian Hart
发明人： David Goodall , Brian Hart
IPC分类号： H04B17/00
CPC分类号： G05D1/0274 , G05D1/0227 , G05D1/024 , G05D1/0242 , G05D1/0255 , G05D1/028 , G05D2201/0207 , H04W16/18
摘要： A method, apparatus, and carrier medium carrying computer readable code. The apparatus includes a mobile robot arranged in operation to traverse an area, a first transceiver for a wireless network mounted on the robot and arranged in operation to communicate with a second transceiver to effect radio measurement operations including determining a measure indicative of the path loss between the first and second transceivers, and a location determining system at least a component of which is mounted on the robot and arranged in operation to determine the location of the first transceiver in the area.
摘要翻译：一种携带计算机可读代码的方法，装置和载体介质。该装置包括：移动机器人，其被布置成操作以横越一个区域;第一收发器，用于安装在机器人上的无线网络，并且被布置为与第二收发器进行通信，以实现无线电测量操作，包括确定指示路径损耗的度量所述第一和第二收发器以及位置确定系统，所述位置确定系统的至少一部分安装在所述机器人上并被布置在操作中以确定所述区域中的所述第一收发器的位置。

18. 发明授权

US07151759B1 Automatic gain control and low power start-of-packet detection for a wireless LAN receiver 有权
标题翻译：无线LAN接收机的自动增益控制和低功率启动包检测
公开(公告)号：US07151759B1
公开(公告)日：2006-12-19
申请号：US10095668
申请日：2002-03-08
申请人： Philip J. Ryan , Andrew R. Adams , John D. O'Sullivan , Uri Parker , Brian Hart , Grzegorz B. Zyner
发明人： Philip J. Ryan , Andrew R. Adams , John D. O'Sullivan , Uri Parker , Brian Hart , Grzegorz B. Zyner
IPC分类号： H04Q7/00
CPC分类号： H03G3/3078
摘要： A digital AGC system for burst operation, particularly suited for receiving packets in a wireless local area network. One embodiment includes a log detector that provides a signal strength measure, called the received signal strength indication (RSSI) over a wide dynamic range. The AGC system includes estimating the power in a received signal by averaging the log of the signal power. The Start of Packet detection avoids using the radio receiver's main analog to digital converters to preserve power.
摘要翻译：一种用于突发操作的数字AGC系统，特别适用于在无线局域网中接收分组。一个实施例包括在宽动态范围内提供称为接收信号强度指示（RSSI）的信号强度测量的对数检测器。 AGC系统包括通过对信号功率的对数求平均来估计接收信号中的功率。分组检测的开始避免使用无线电接收机的主要模数转换器来保持功率。

19. 发明申请

US20060231498A1 Reactive filtration 审中-公开
标题翻译：反应过滤
公开(公告)号：US20060231498A1
公开(公告)日：2006-10-19
申请号：US11403648
申请日：2006-04-13
申请人： Brian Hart , Gregory Moller
发明人： Brian Hart , Gregory Moller
IPC分类号： C02F1/52
CPC分类号： C02F1/66 , C02F1/5236 , C02F1/5263 , C02F1/705
摘要： In one embodiment, a method for removing a contaminant from alkaline water includes adding ferric iron to alkaline water until reaching a pH less than 7 to form a neutralized solution and exposing the neutralized solution to iron metal.
摘要翻译：在一个实施方案中，从碱性水中除去污染物的方法包括将三价铁添加到碱性水中直到pH小于7以形成中和的溶液并将中和的溶液暴露于铁金属。

20. 发明申请

US20060227751A1 Radio plan generator 有权
标题翻译：无线电计划生成器
公开(公告)号：US20060227751A1
公开(公告)日：2006-10-12
申请号：US11102509
申请日：2005-04-08
申请人： David Theobold , Lu Qian , Bretton Douglas , Brian Hart
发明人： David Theobold , Lu Qian , Bretton Douglas , Brian Hart
IPC分类号： H04Q7/24
CPC分类号： H04W16/18
摘要： A method, apparatus, and carrier medium carrying instructions to assign frequency channels and transmit powers for a plurality of access points of a wireless network. The method includes, until there are no more access points to which to assign a transmit power and frequency channel, selecting a next current access point, determining for a set of at least one transmit power for a set of at least one frequency channel a measure of the quality of the sub-network formed by the current access point and all already-assigned access points an evaluation metric indicative of the quality of the sub-network, and assigning to the current access point the transmit power and frequency channel that minimizes the measure of the quality of the sub-network.
摘要翻译：一种方法，装置和载波介质，其携带用于为无线网络的多个接入点分配频率信道和发射功率的指令。该方法包括，直到没有更多的接入点来分配发射功率和频率信道，选择下一个当前接入点，确定一组至少一个频率信道的至少一个发射功率的度量由当前接入点和所有已经分配的接入点形成的子网络的质量指示表示子网质量的评估度量，并且向当前接入点分配使最小化的发射功率和频率信道测量子网的质量。

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