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1. 发明授权

US08159932B1 Initial timing estimation in a wireless network receiver 有权
标题翻译：无线网络接收机中的初始定时估计
公开(公告)号：US08159932B1
公开(公告)日：2012-04-17
申请号：US12346637
申请日：2008-12-30
申请人： Brian Hart , Milind D. Paranjpe , John D. O'Sullivan
发明人： Brian Hart , Milind D. Paranjpe , John D. O'Sullivan
IPC分类号： H04J11/00 , H04J3/06
CPC分类号： H04L27/2662 , H04L27/2656
摘要： An apparatus for and a method of wirelessly receiving a signal, and detecting a start of packet (SOP) from the received signal using at least one SOP detection criterion. In the case an SOP is detected, determining a plurality of metrics from the received signal, and using at least two of the plurality of metrics to determine an initial timing for a received packet. Different versions combine the metrics in different ways to determine the initial timing. The apparatus includes a processing circuit coupled to a radio receiver to determine a plurality of metrics from a wirelessly received signal, and an initial time determining circuit coupled to the SOP detector and the processing circuit. In the case an SOP is detected, the initial time determining circuit uses at least two of the plurality of metrics to determine an initial timing for a received packet.
摘要翻译：一种用于无线地接收信号的装置和方法，以及使用至少一个SOP检测标准从接收到的信号检测分组（SOP）的开始。在检测到SOP的情况下，从接收到的信号确定多个度量，并且使用多个度量中的至少两个来确定接收到的分组的初始定时。不同的版本以不同的方式组合度量来确定初始时间。该装置包括耦合到无线电接收机的处理电路，以从无线接收的信号中确定多个度量，以及耦合到SOP检测器和处理电路的初始时间确定电路。在检测到SOP的情况下，初始时间确定电路使用多个度量中的至少两个来确定接收到的分组的初始定时。

2. 发明授权

US07480234B1 Initial timing estimation in a wireless network receiver 有权
标题翻译：无线网络接收机中的初始定时估计
公开(公告)号：US07480234B1
公开(公告)日：2009-01-20
申请号：US10698703
申请日：2003-10-31
申请人： Brian Hart , Milind D. Paranjpe , John D. O'Sullivan
发明人： Brian Hart , Milind D. Paranjpe , John D. O'Sullivan
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L27/2656
摘要： A method that includes wirelessly receiving a signal, and detecting a start of packet (SOP) for a packet that conforms to a wireless networking standard. The detecting from the received signal uses at least one SOP detection criterion. In the case an SOP is detected, the method further includes determining a plurality of metrics from the received signal, and using at least two of the plurality of metrics to determine an initial timing for a received packet. Different versions combine the metrics in different ways to determine the initial timing. Also an apparatus that includes a radio receiver to receive a signal and output a received signal, and an SOP detector coupled to the radio receiver to detect a start of packet (SOP) from a received signal using at least one SOP detection criterion for a packet that conforms to a wireless networking standard. The apparatus further includes a processing circuit coupled to the radio receiver to determine a plurality of metrics from the received signal, and a initial time determining circuit coupled to the SOP detector and the processing circuit. In the case an SOP is detected, the initial time determining circuit uses at least two of the plurality of metrics to determine an initial timing for a received packet.
摘要翻译：一种方法，包括无线地接收信号，以及检测符合无线网络标准的分组的分组开始（SOP）。从接收信号的检测使用至少一个SOP检测标准。在检测到SOP的情况下，该方法还包括从接收到的信号中确定多个度量，并且使用多个度量中的至少两个来确定接收到的分组的初始定时。不同的版本以不同的方式组合度量来确定初始时间。还有一种装置，其包括用于接收信号并输出接收信号的无线电接收机，以及耦合到无线电接收机的SOP检测器，用于使用用于分组的至少一个SOP检测标准从接收信号检测分组开始（SOP）符合无线网络标准。该装置还包括耦合到无线电接收机的处理电路，用于根据接收到的信号确定多个度量，以及耦合到SOP检测器和处理电路的初始时间确定电路。在检测到SOP的情况下，初始时间确定电路使用多个度量中的至少两个来确定接收到的分组的初始定时。

3. 发明授权

US07062703B1 Early detection of false start-of-packet triggers in a wireless network node 失效
标题翻译：早期检测无线网络节点中的错误启动包触发器
公开(公告)号：US07062703B1
公开(公告)日：2006-06-13
申请号：US10629383
申请日：2003-07-28
申请人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
发明人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
IPC分类号： H04L1/00 , H04L1/20
CPC分类号： H04L1/0061 , H04L1/0045 , H04L1/0072 , H04L1/0083
摘要： An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field. In such an implementation, the checking includes processing the first field and checking one or more bits in the first field to determine whether or not they have their respective correct values, and, if the checked bits of the first field have their respective correct values, checking the second field for integrity.
摘要翻译：存储用于实现方法的指令的装置，载体介质以及能够接收完全或基本上符合无线网络标准的分组的无线网络的节点中的方法，根据该装置，每个分组包括具有相应位的报头在数据包完全符合标准的情况下的正确值。该方法包括接收指示分组可能已被接收的分组开始（SOP）触发，检查报头中的一个或多个比特以确定它们是否具有各自的正确值，并继续处理分组在检查指示所检查的位具有它们各自的正确值的情况下。在一个实现中，报头包括以已知速率调制的具有一个或多个保留位位置的第一场和以第一场指示的数据速率调制的第二场。在这种实现中，检查包括处理第一字段并检查第一字段中的一个或多个比特以确定它们是否具有它们各自的正确值，并且如果第一字段的被检查比特具有各自的正确值，检查第二个字段的完整性。

4. 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。

5. 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。

6. 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。

7. 发明授权

US07849391B2 Early detection of false start-of-packet triggers in a wireless network node 有权
标题翻译：早期检测无线网络节点中的错误启动包触发器
公开(公告)号：US07849391B2
公开(公告)日：2010-12-07
申请号：US12175067
申请日：2008-07-17
申请人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
发明人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
IPC分类号： H04L1/20 , H03M13/09
CPC分类号： H04L1/0061 , H04L1/0045 , H04L1/0072 , H04L1/0083
摘要： An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field. In such an implementation, the checking includes processing the first field and checking one or more bits in the first field to determine whether or not they have their respective correct values, and, if the checked bits of the first field have their respective correct values, checking the second field for integrity.
摘要翻译：存储用于实现方法的指令的装置，载体介质以及能够接收完全或基本上符合无线网络标准的分组的无线网络的节点中的方法，根据该装置，每个分组包括具有相应位的报头在数据包完全符合标准的情况下的正确值。该方法包括接收指示分组可能已被接收的分组开始（SOP）触发，检查报头中的一个或多个比特以确定它们是否具有各自的正确值，并继续处理分组在检查指示所检查的位具有它们各自的正确值的情况下。在一个实现中，报头包括以已知速率调制的具有一个或多个保留位位置的第一场和以第一场指示的数据速率调制的第二场。在这种实现中，检查包括处理第一字段并检查第一字段中的一个或多个比特以确定它们是否具有它们各自的正确值，并且如果第一字段的被检查比特具有各自的正确值，检查第二个字段的完整性。

8. 发明授权

US07840225B2 Radiolocation in a wireless network using time difference of arrival 有权
标题翻译：无线网络中的无线定位使用到达时差
公开(公告)号：US07840225B2
公开(公告)日：2010-11-23
申请号：US11874835
申请日：2007-10-18
申请人： Jason R. Crawford , John D. O'Sullivan , Brian Hart
发明人： Jason R. Crawford , John D. 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。

9. 发明申请

US20080273536A1 EARLY DETECTION OF FALSE START-OF-PACKET TRIGGERS IN A WIRELESS NETWORK NODE 有权
标题翻译：早期检测无线网络节点中的假启动包启动器
公开(公告)号：US20080273536A1
公开(公告)日：2008-11-06
申请号：US12175067
申请日：2008-07-17
申请人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
发明人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
IPC分类号： H04L12/56
CPC分类号： H04L1/0061 , H04L1/0045 , H04L1/0072 , H04L1/0083
摘要： An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field. In such an implementation, the checking includes processing the first field and checking one or more bits in the first field to determine whether or not they have their respective correct values, and, if the checked bits of the first field have their respective correct values, checking the second field for integrity.
摘要翻译：存储用于实现方法的指令的装置，载体介质以及能够接收完全或基本上符合无线网络标准的分组的无线网络的节点中的方法，根据该装置，每个分组包括具有相应位的报头在数据包完全符合标准的情况下的正确值。该方法包括接收指示分组可能已被接收的分组开始（SOP）触发，检查报头中的一个或多个比特以确定它们是否具有各自的正确值，并继续处理分组在检查指示所检查的位具有它们各自的正确值的情况下。在一个实现中，报头包括以已知速率调制的具有一个或多个保留位位置的第一场和以第一场指示的数据速率调制的第二场。在这种实现中，检查包括处理第一字段并检查第一字段中的一个或多个比特以确定它们是否具有它们各自的正确值，并且如果第一字段的被检查比特具有各自的正确值，检查第二个字段的完整性。

10. 发明授权

US07415661B2 Early detection of false start-of-packet triggers in a wireless network node 有权
标题翻译：早期检测无线网络节点中的错误启动包触发器
公开(公告)号：US07415661B2
公开(公告)日：2008-08-19
申请号：US11380152
申请日：2006-04-25
申请人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
发明人： Richard A. Keaney , John D. O'Sullivan , Brian Hart , Philip J. Ryan , Kurt A. Lumbatis , Kevin C. H. Wong
IPC分类号： H03M13/09
CPC分类号： H04L1/0061 , H04L1/0045 , H04L1/0072 , H04L1/0083
摘要： An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field. In such an implementation, the checking includes processing the first field and checking one or more bits in the first field to determine whether or not they have their respective correct values, and, if the checked bits of the first field have their respective correct values, checking the second field for integrity.
摘要翻译：存储用于实现方法的指令的装置，载体介质以及能够接收完全或基本上符合无线网络标准的分组的无线网络的节点中的方法，根据该装置，每个分组包括具有相应位的报头在数据包完全符合标准的情况下的正确值。该方法包括接收指示分组可能已被接收的分组开始（SOP）触发，检查报头中的一个或多个比特以确定它们是否具有各自的正确值，并继续处理分组在检查指示所检查的位具有它们各自的正确值的情况下。在一个实现中，报头包括以已知速率调制的具有一个或多个保留位位置的第一场和以第一场指示的数据速率调制的第二场。在这种实现中，检查包括处理第一字段并检查第一字段中的一个或多个比特以确定它们是否具有它们各自的正确值，并且如果第一字段的被检查比特具有各自的正确值，检查第二个字段的完整性。

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