公开(公告)号：US09325532B2

公开(公告)日：2016-04-26

申请号：US10562618

申请日：2004-06-30

Applicant: Jan Boer ,  Bas Driesen ,  Tim Schenk ,  Allert Van Zelst

Inventor： Jan Boer ,  Bas Driesen ,  Tim Schenk ,  Allert Van Zelst

IPC: H04M1/00 ,  H04L25/02 ,  H04W16/28 ,  H04B7/06 ,  H04W16/24 ,  H04L5/00 ,  H04B7/04

CPC classification number: H04L25/0232 ,  H04B7/0413 ,  H04B7/0617 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04W16/24 ,  H04W16/28

Abstract: A method and apparatus are provided for transmitting one or more symbols in a multiple antenna wireless communication system. Subcarriers from one or more symbols are interleaved across a plurality of antennas. The symbols may be, for example, long or short training symbols based on a single-antenna long or short training symbol, respectively, and wherein each subsequent subcarrier from the single-antenna training symbol is positioned in a training symbol for a logically adjacent antenna. One or more additional subcarriers may be inserted in at least one of the plurality of symbols to allow nulled subcarriers to be estimated using an interpolation-based channel estimation technique. The remaining portions of a header, as well as the data sequences of a packet, may also be diagonally loaded.

Abstract translation: 提供一种在多天线无线通信系统中发送一个或多个符号的方法和装置。 来自一个或多个符号的子载波在多个天线之间交织。 符号可以是例如分别基于单天线长或短训练符号的长或短训练符号，并且其中来自单天线训练符号的每个后续子载波被定位在用于逻辑相邻天线的训练符号中 。 可以在多个符号中的至少一个中插入一个或多个附加子载波，以允许使用基于插值的信道估计技术来估计零位副载波。 报头的剩余部分以及分组的数据序列也可以对角地加载。

公开(公告)号：US20090199076A1

公开(公告)日：2009-08-06

申请号：US12422696

申请日：2009-04-13

Applicant: Jan Boer ,  Wilhelmus Diepstraten ,  Joachim S. Hammerschmidt ,  Syed Aon Mujtaba

Inventor： Jan Boer ,  Wilhelmus Diepstraten ,  Joachim S. Hammerschmidt ,  Syed Aon Mujtaba

IPC: G06F11/07

CPC classification number: H04L1/1829

Abstract: A station for a communications network. In one embodiment, the station includes a decoder, a check processor, and a transmitter. The decoder is adapted to decode a received encoded data unit. The check processor is adapted to determine whether the encoded data unit has been correctly received. The transmitter is adapted to initiate, prior to the check processor completing the determination whether the encoded data unit has been correctly received, the transmission of an acknowledgment message comprising a frame having a plurality of different fields of data. The transmitter is adapted to modify the transmission of the acknowledgment message if the check processor determines that the data unit has not been correctly received.

Abstract translation: 通信网站。 在一个实施例中，站包括解码器，检查处理器和发射器。 解码器适于对接收到的编码数据单元进行解码。 检查处理器适于确定编码数据单元是否已被正确接收。 所述发射机适于在所述检查处理器完成所述编码数据单元是否已被正确接收的确定之前发起包括具有多个不同数据场的帧的确认消息的发送。 如果检查处理器确定数据单元未被正确接收，则发射机适于修改确认消息的传输。

公开(公告)号：US20090129451A1

公开(公告)日：2009-05-21

申请号：US12346476

申请日：2008-12-30

Applicant: Jan Boer ,  Bas Driesen ,  Ra'anan Gil ,  Kai Roland Kriedte

Inventor： Jan Boer ,  Bas Driesen ,  Ra'anan Gil ,  Kai Roland Kriedte

IPC: H04B1/38

CPC classification number: H04L1/002 ,  H04L1/0002 ,  H04L1/206 ,  Y02D50/10

Abstract: A method for controlling a data transmission rate of at least one transceiver in a wireless system, the transceiver including a transmitter and a receiver, the method including the steps of: determining a signal quality characteristic corresponding to a signal received at the receiver by measuring a difference between one or more reference constellation points and one or more received constellation points, the signal quality characteristic representing an estimation of signal degradation through the wireless communication channel; and modifying a data transmission rate of the transmitter as a function of the signal quality characteristic. The step of modifying the data transmission rate of the transmitter includes: determining lower and upper threshold levels representing reference minimum and maximum signal quality characteristics, respectively, corresponding to the data transmission rate; measuring a signal quality characteristic of the received signal; determining whether the measured signal quality characteristic is within the lower and upper threshold levels; maintaining the data transmission rate when the measured signal quality characteristic is between the lower and upper threshold levels; and increasing the data transmission rate when the measured signal quality characteristic is less than one or more lower threshold levels associated with one or more corresponding higher data rates.

Abstract translation: 一种用于控制无线系统中的至少一个收发器的数据传输速率的方法，所述收发器包括发射机和接收机，所述方法包括以下步骤：确定与在接收机处接收的信号相对应的信号质量特性， 一个或多个参考星座点与一个或多个接收到的星座点之间的差异，信号质量特性表示通过无线通信信道的信号劣化的估计; 以及根据信号质量特性修改发射机的数据传输速率。 修改发射机的数据传输速率的步骤包括：分别对应于数据传输速率确定代表参考最小和最大信号质量特性的较低和较高阈值电平; 测量接收信号的信号质量特性; 确定测量的信号质量特性是否在下限和上限阈值水平之内; 当测量的信号质量特性在下限和上限阈值之间时，保持数据传输速率; 以及当测量的信号质量特性小于与一个或多个相应较高数据速率相关联的一个或多个下限阈值时，增加数据传输速率。

公开(公告)号：US20060252386A1

公开(公告)日：2006-11-09

申请号：US10562619

申请日：2004-06-30

Applicant: Jan Boer ,  Bas Driesen ,  Tim Schenk ,  Allert Van Zelst

Inventor： Jan Boer ,  Bas Driesen ,  Tim Schenk ,  Allert Van Zelst

IPC: H04B1/02

CPC classification number: H04B7/0413 ,  H04B7/0684 ,  H04L1/06 ,  H04L25/0202 ,  H04L25/0226 ,  H04L27/2613

Abstract: A method and apparatus are disclosed for transmitting symbols in a multiple antenna wireless communication system, such that the symbols can be interpreted by a lower order receiver (i.e., a receiver having a fewer number of antennas than the transmitter). For example, subcarriers from one or more symbols can be transmitted such that each of the subcarriers are active on only one of the antennas at a given time. In one implementation, the subcarriers are diagonally loaded across logically adjacent antennas. The symbols can include one or more long training symbols and optionally a SIGNAL field that indicates a duration that a receiver should defer until a subsequent transmission. In this manner, a transmitter in accordance with the present invention may be backwards compatible with a lower order receiver and a lower order receiver can interpret the transmitted symbols or defer for an appropriate duration.

Abstract translation: 公开了用于在多天线无线通信系统中发送符号的方法和装置，使得符号可以由较低阶接收机（即，具有比发射机更少数量的天线的接收机）来解释。 例如，可以发送来自一个或多个符号的子载波，使得每个子载波在给定时间仅在一个天线上是有效的。 在一个实现中，副载波在逻辑上相邻的天线之间被对角地加载。 符号可以包括一个或多个长训练符号和可选的SIGNAL字段，其指示接收机延迟直到后续传输的持续时间。 以这种方式，根据本发明的发射机可以与较低阶接收机向后兼容，而低阶接收机可以解释所发送的符号或延迟适当的持续时间。

公开(公告)号：US20050068979A1

公开(公告)日：2005-03-31

申请号：US10672657

申请日：2003-09-26

Applicant: Jan Boer ,  Wilhelmus Diepstraten ,  Robert Kopmeiners ,  Kai Kriedte

Inventor： Jan Boer ,  Wilhelmus Diepstraten ,  Robert Kopmeiners ,  Kai Kriedte

IPC: H04L12/28 ,  H04B7/26 ,  H04L12/413 ,  H04L12/56 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04L27/0012 ,  H04L27/2647 ,  H04W74/0825

Abstract: A method and apparatus are disclosed for detecting a collision in a carrier sense multiple access wireless communication system. Each transmitting station includes a collision detector that evaluates one or more predefined criteria to determine when a collision has occurred. The collision detector evaluates the measured energy level and optionally payload and/or preamble detection information to determine if a collision has occurred. A collision occurred when an expected ACK message is not received, in the presence of an increased energy level and possibly preamble or payload detection information. The collision detector of the present invention can be activated, for example, at a time corresponding to the start of the 802.11 Short Inter Frame Space interval.

Abstract translation: 公开了用于检测载波侦听多址无线通信系统中的冲突的方法和装置。 每个发射站包括一个碰撞检测器，该碰撞检测器评估一个或多个预定标准以确定碰撞发生的时间。 碰撞检测器评估所测量的能级，以及可选的有效载荷和/或前导码检测信息，以确定是否发生了冲突。 在存在增加的能级和可能的前导码或有效载荷检测信息的情况下，当未接收到期望的ACK消息时发生冲突。 本发明的碰撞检测器例如可以在对应于802.11短帧间隔间隔的开始的时间被激活。

公开(公告)号：US08503577B2

公开(公告)日：2013-08-06

申请号：US10621862

申请日：2003-07-17

Applicant: Jan Boer ,  Bas Driesen ,  Ra'anan Gil ,  Kai Roland Kriedte

Inventor： Jan Boer ,  Bas Driesen ,  Ra'anan Gil ,  Kai Roland Kriedte

IPC: H04L27/06

CPC classification number: H04L1/208 ,  H04L1/20

Abstract: In a wireless system including a wireless communication channel, a method for estimating a signal quality of a received signal includes the steps of receiving a signal from the wireless communication channel, the received signal including at least one field that is modulated and encoded in a substantially fixed manner, and generating at least one reference field based, at least in part, on the at least one field and on a channel estimation signal. The channel estimation signal is representative of at least one characteristic of the wireless communication channel. The method further includes the step of generating a signal quality estimate as a function of the at least one field in the received signal and the generated at least one reference field.

Abstract translation: 在包括无线通信信道的无线系统中，用于估计接收信号的信号质量的方法包括以下步骤：从无线通信信道接收信号，所接收的信号包括被实质上被调制和编码的至少一个场 至少部分地基于所述至少一个场和信道估计信号生成至少一个参考场。 信道估计信号表示无线通信信道的至少一个特性。 该方法还包括以下步骤：根据所接收的信号和所生成的至少一个参考场产生作为至少一个场的函数的信号质量估计。

公开(公告)号：US20060253765A1

公开(公告)日：2006-11-09

申请号：US11121191

申请日：2005-05-03

Applicant: Jan Boer ,  Wilhelmus Diepstraten ,  Joachim Hammerschmidt ,  Syed Mujtaba

Inventor： Jan Boer ,  Wilhelmus Diepstraten ,  Joachim Hammerschmidt ,  Syed Mujtaba

IPC: H04L1/18

CPC classification number: H04L1/1829

Abstract: A method for processing a received encoded data unit comprises: decoding the received encoded data unit; determining whether the encoded data unit has been correctly received; prior to completing the determination of whether the encoded data unit has been correctly received, initiating the transmission of an acknowledgment message; and modifying the transmission of the acknowledgment message if it is determined that the data unit has not been correctly received. In another embodiment, a station for a communications network comprises: a decoder adapted to decode a received encoded data unit; a check processor adapted to determine whether the encoded data unit has been correctly received; and a transmitter adapted to initiate the transmission of an acknowledgment message prior to the check processor completing the determination whether the encoded data unit has been correctly received. The transmitter is adapted to modify the transmission of the acknowledgment message if the check processor determines that the data unit has not been correctly received.

公开(公告)号：US06637264B2

公开(公告)日：2003-10-28

申请号：US09820851

申请日：2001-03-30

Applicant: Joost Conrad Lötters ,  Hendrik Jan Boer ,  Wybren Jouwsma

Inventor： Joost Conrad Lötters ,  Hendrik Jan Boer ,  Wybren Jouwsma

IPC: G01F168

CPC classification number: G01F1/699 ,  G01F1/6847 ,  G01F1/698

Abstract: Mass flowmeter comprising a hollow conduit of a heat-conducting material for transporting in a determined flow direction a fluid with a mass flow rate to be measured, a first temperature-sensitive resistor element at a first position in thermal contact with this conduit for supplying heat to said fluid, a temperature sensor and measuring and control means connectable to the resistor element and the temperature sensor, wherein the temperature sensor is provided in thermal contact with the conduit at a second position upstream in relation to said first position, and the measuring and control means are adapted to maintain a constant difference in temperature at said first and second positions.

Abstract translation: 质量流量计包括导热材料的中空管道，用于在确定的流动方向上输送具有要测量的质量流量的流体;第一温度敏感电阻器元件，在与该导管热接触的第一位置处，用于供应热量 所述流体，温度传感器以及可连接到所述电阻元件和所述温度传感器的测量和控制装置，其中所述温度传感器在相对于所述第一位置的上游的第二位置处与所述导管热接触，并且所述测量和 控制装置适于在所述第一和第二位置处保持恒定的温度差。

公开(公告)号：US5987033A

公开(公告)日：1999-11-16

申请号：US925416

申请日：1997-09-08

Applicant: Jan Boer ,  Hendrik van Bokhorst ,  Wilhelmus Josephus Diepstraten ,  Adriaan Kamerman ,  Rienk Mud ,  Hans van Driest ,  Robert John Kopmeiners

Inventor： Jan Boer ,  Hendrik van Bokhorst ,  Wilhelmus Josephus Diepstraten ,  Adriaan Kamerman ,  Rienk Mud ,  Hans van Driest ,  Robert John Kopmeiners

IPC: H04L12/28 ,  H04B7/00 ,  H04L12/413 ,  H04Q7/00

CPC classification number: H04W74/0816 ,  Y02B60/50

Abstract: A receiver, and a method for operating the receiver, for a station in a wireless local area network using a common wireless communication channel and employing a CSMA/CA (carrier sense multiple access with collision avoidance) protocol includes various modes. In normal mode, the receiver follows typical states in order to detect a message and demodulate data from the message properly. Meanwhile, a process implements a message-in-message (MIM) mode when an energy increase above a specified level is detected. While in the MIM mode, if a carrier is detected, the energy increase is caused by a new message; otherwise, the energy increase is caused by an interfering station. If the carrier is detected, the receiver begins retraining so that it can start receiving the new message as soon as the first message ends. If no carrier is detected, the receiver waits a specified time to detect a carrier or for the end of the first message, after which the receiver returns to the beginning of the normal mode. While in the normal mode, if a message is detected that is not addressed to the station, the receiver enters a hunt mode. While in the hunt mode, the receiver waits for the current message to finish. At the same time, a process implements retraining when both an energy increase above a specified level and a carrier are detected. If no carrier is detected within a specified time, or if the energy level decreases below the specified level, the receiver returns to the beginning of the normal mode.

Abstract translation: 使用公共无线通信信道和采用CSMA / CA（具有冲突避免的载波侦听多路访问）协议的无线局域网中的站的接收机和操作接收机的方法包括各种模式。 在正常模式下，接收机遵循典型状态，以便检测消息并正确地解调消息中的数据。 同时，当检测到高于指定电平的能量增加时，处理实现消息消息（MIM）模式。 在MIM模式下，如果检测到载波，则能量增加是由新信息引起的; 否则，能量增加是由干扰站造成的。 如果检测到载波，则接收机开始重新训练，以便在第一个消息结束时，它可以开始接收新消息。 如果没有检测到载波，则接收机等待指定的时间来检测载波或第一个消息的结束，接收机返回到正常模式的开始。 在正常模式下，如果检测到没有寻址到站的消息，则接收机进入寻线模式。 在寻线模式下，接收机等待当前消息完成。 同时，当检测到高于指定水平的能量增加和载波时，过程实施再训练。 如果在指定时间内没有检测到载波，或者能量水平降低到指定的电平以下，则接收机返回正常模式的开始。

公开(公告)号：US08085806B2

公开(公告)日：2011-12-27

申请号：US10672657

申请日：2003-09-26

Applicant: Jan Boer ,  Wilhelmus Diepstraten ,  Robert John Kopmeiners ,  Kai Roland Kriedte

Inventor： Jan Boer ,  Wilhelmus Diepstraten ,  Robert John Kopmeiners ,  Kai Roland Kriedte

IPC: H04L12/413

CPC classification number: H04L27/0012 ,  H04L27/2647 ,  H04W74/0825

Abstract: A method and apparatus are disclosed for detecting a collision in a carrier sense multiple access wireless communication system. Each transmitting station includes a collision detector that evaluates one or more predefined criteria to determine when a collision has occurred. The collision detector evaluates the measured energy level and optionally payload and/or preamble detection information to determine if a collision has occurred. A collision occurred when an expected ACK message is not received, in the presence of an increased energy level and possibly preamble or payload detection information. The collision detector of the present invention can be activated, for example, at a time corresponding to the start of the 802.11 Short Inter Frame Space interval.

Abstract translation: 公开了用于检测载波侦听多址无线通信系统中的冲突的方法和装置。 每个发射站包括一个碰撞检测器，该碰撞检测器评估一个或多个预定标准以确定碰撞发生的时间。 碰撞检测器评估所测量的能级，以及可选的有效载荷和/或前导码检测信息，以确定是否发生了冲突。 在存在增加的能级和可能的前导码或有效载荷检测信息的情况下，当未接收到期望的ACK消息时发生冲突。 本发明的碰撞检测器例如可以在对应于802.11短帧间隔间隔的开始的时间被激活。