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1. 发明授权

US07463589B2 Wireless LAN with enhanced carrier sensing 有权
标题翻译：无线局域网具有增强的载波侦听功能
公开(公告)号：US07463589B2
公开(公告)日：2008-12-09
申请号：US09919051
申请日：2001-07-31
申请人： Wilhelmus Diepstraten , Adriaan Kamerman , Kai Roland Kriedte , D. J. Richard Van Nee
发明人： Wilhelmus Diepstraten , Adriaan Kamerman , Kai Roland Kriedte , D. J. Richard Van Nee
IPC分类号： H04J1/16 , H04J3/14 , H04J1/00 , H04L12/26
CPC分类号： H04W74/0808 , H04L27/2602 , H04W84/12 , H04W88/06
摘要： Medium access control device (301) for a mobile network station (3, 4, 5) or an access point (AP1) in a wireless local area network (1), having controlling means (302), processing means (303) and transmitting and receiving means (304); the controlling means (302) being arranged to control transmission and reception of radio frequency data signals containing data symbols; the transmitting and receiving means (304) being arranged for transmission and reception of electromagnetic data signals; the processing means (303) being arranged for detecting a first signal portion and a second signal portion in the received data signal, the second signal portion following the first signal portion and having a signal coding differing from a signal coding of the first signal portion.
摘要翻译：一种用于无线局域网（1）中的移动网络站（3,4,5）或接入点（AP1）的媒体接入控制设备（301），具有控制装置（302），处理装置（303）和传输和接收装置（304）。控制装置（302）被布置成控制包含数据符号的射频数据信号的发送和接收; 发送和接收装置（304）被布置用于发送和接收电磁数据信号; 处理装置（303）被布置用于检测接收数据信号中的第一信号部分和第二信号部分，第二信号部分跟随第一信号部分并且具有与第一信号部分的信号编码不同的信号编码。

2. 发明授权

US08085806B2 Method and apparatus for detecting a collision in a carrier sense multiple access wireless system 有权
标题翻译：用于检测载波侦听多址无线系统中的冲突的方法和装置
公开(公告)号：US08085806B2
公开(公告)日：2011-12-27
申请号：US10672657
申请日：2003-09-26
申请人： Jan Boer , Wilhelmus Diepstraten , Robert John Kopmeiners , Kai Roland Kriedte
发明人： Jan Boer , Wilhelmus Diepstraten , Robert John Kopmeiners , Kai Roland Kriedte
IPC分类号： H04L12/413
CPC分类号： H04L27/0012 , H04L27/2647 , H04W74/0825
摘要： 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.
摘要翻译：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。

3. 发明申请

US20090129451A1 Data Transmission Rate Adaptation in a Wireless Communication System 有权
标题翻译：无线通信系统中的数据传输速率适应
公开(公告)号：US20090129451A1
公开(公告)日：2009-05-21
申请号：US12346476
申请日：2008-12-30
申请人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
发明人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
IPC分类号： H04B1/38
CPC分类号： H04L1/002 , H04L1/0002 , H04L1/206 , Y02D50/10
摘要： 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.
摘要翻译：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。

4. 发明授权

US08615033B2 Data transmission rate adaptation in a wireless communication system 有权
标题翻译：无线通信系统中的数据传输速率适应
公开(公告)号：US08615033B2
公开(公告)日：2013-12-24
申请号：US12346476
申请日：2008-12-30
申请人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
发明人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
IPC分类号： H04B1/38
CPC分类号： H04L1/002 , H04L1/0002 , H04L1/206 , Y02D50/10
摘要： A method for controlling a transmission rate of at least one transceiver, the transceiver including a transmitter and a receiver, includes: 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, and modifying a transmission rate of the transmitter over a wireless communication channel as a function of the signal quality characteristic. The step of modifying the transmission rate over the wireless communication channel includes: determining lower and upper threshold levels representing reference minimum and maximum signal quality characteristics, respectively, corresponding to the transmission rate; maintaining the transmission rate when the measured signal quality characteristic is between the lower and upper threshold levels; and increasing the transmission rate when the signal quality characteristic is less than one or more lower threshold levels associated with one or more corresponding higher transmission rates.
摘要翻译：一种用于控制至少一个收发器的传输速率的方法，所述收发器包括发射机和接收机，包括：通过测量一个或多个参考星座点与一个参考星座点之间的差异来确定与在接收机处接收到的信号相对应的信号质量特性或更多的接收到的星座点，以及作为信号质量特性的函数，通过无线通信信道修改发射机的传输速率。通过无线通信信道修改传输速率的步骤包括：分别对应于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; 当测量的信号质量特性在下限阈值和上限阈值之间时，保持传输速率; 以及当信号质量特性小于与一个或多个相应较高传输速率相关联的一个或多个下限阈值时，增加传输速率。

5. 发明授权

US08503577B2 Signal quality estimation in a wireless communication system 有权
标题翻译：无线通信系统中的信号质量估计
公开(公告)号：US08503577B2
公开(公告)日：2013-08-06
申请号：US10621862
申请日：2003-07-17
申请人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
发明人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
IPC分类号： H04L27/06
CPC分类号： H04L1/208 , H04L1/20
摘要： 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.
摘要翻译：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。

6. 发明授权

US07499486B2 Data transmission rate adaptation in a wireless communication system 有权
标题翻译：无线通信系统中的数据传输速率适应
公开(公告)号：US07499486B2
公开(公告)日：2009-03-03
申请号：US10305554
申请日：2002-11-27
申请人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
发明人： Jan Boer , Bas Driesen , Ra'anan Gil , Kai Roland Kriedte
IPC分类号： H04L1/00 , H04J3/16
CPC分类号： H04L1/002 , H04L1/0002 , H04L1/206 , Y02D50/10
摘要： In a wireless system comprising at least one transceiver configurable for communication over a wireless communication channel, the transceiver comprising a transmitter and a receiver, a method for controlling a data transmission rate of the at least one transceiver comprises the steps of: (i) 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; and (ii) modifying a data transmission rate of the transmitter based, at least in part, on the signal quality characteristic.
摘要翻译：一种无线系统，包括至少一个可配置用于通过无线通信信道进行通信的收发机，所述收发机包括发射机和接收机，用于控制所述至少一个收发机的数据传输速率的方法包括以下步骤：（i）确定通过测量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，所述信号质量特征对应于在接收机处接收的信号，所述信号质量特性表示信号劣化的估计; 以及（ii）至少部分地基于所述信号质量特性来修改所述发射机的数据传输速率。

7. 发明授权

US07254196B2 Symbol timing for MIMO OFDM and other wireless communication systems 有权
标题翻译： MIMO OFDM和其他无线通信系统的符号定时
公开(公告)号：US07254196B2
公开(公告)日：2007-08-07
申请号：US10644702
申请日：2003-08-20
申请人： Kai Roland Kriedte , Tim Schenk , Allert van Zelst
发明人： Kai Roland Kriedte , Tim Schenk , Allert van Zelst
IPC分类号： H04B7/10 , H04L1/02
CPC分类号： H04L27/2662 , H04L1/06 , H04L5/023 , H04L7/0054 , H04L7/041 , H04L27/2695
摘要： Symbol timing for a wireless communication system, such as a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) wireless LAN system, is determined by summing the powers for an appropriate set of channel impulse responses, integrating this power summation over an appropriate window (e.g., equivalent to the guard interval), and identifying the time at which the maximum integration occurs. Depending on the implementation, symbol timing can be determined for each receiver branch individually or for all receiver branches jointly. In either case, the determined symbol timing(s) can minimize the amount of inter-symbol and inter-channel interferences that are invoked in the system.
摘要翻译：通过将适当的信道脉冲响应集合的功率相加来确定诸如多输入多输出（MIMO）正交频分复用（OFDM）无线LAN系统的无线通信系统的符号定时，将该功率求和通过适当的窗口（例如，等效于保护间隔），以及识别发生最大集成的时间。根据实现情况，可以单独确定每个接收机分支或对于所有接收机分支的符号定时。在任一情况下，所确定的符号定时可以使在系统中调用的符号间和信道间干扰的量最小化。

8. 发明授权

US06967994B2 Method for operating a communication system and a communication system with training means 有权
标题翻译：用于操作具有训练装置的通信系统和通信系统的方法
公开(公告)号：US06967994B2
公开(公告)日：2005-11-22
申请号：US09948531
申请日：2001-09-07
申请人： Jan Boer , Henk Van Bokhorst , Robert John Kopmeiners , Kai Roland Kriedte , Rienk Mud
发明人： Jan Boer , Henk Van Bokhorst , Robert John Kopmeiners , Kai Roland Kriedte , Rienk Mud
IPC分类号： H04L1/00 , H04L27/22 , H04L5/16 , H04L27/06 , H04L27/14 , H04K9/00
CPC分类号： H04L1/0006
摘要： A system for operating a communication system comprising one or more transmitters and receivers. The transmitted signals are provided with a preamble for training the receiver and/or the transmitter being in communication. The quality of the received signal is measured and compared with a threshold. If the quality is higher or lower than said threshold, a short preamble processing or a long preamble processing, respectively, is used. More than one threshold and associated pairs of preambles having different length may be used.
摘要翻译：一种用于操作包括一个或多个发射器和接收器的通信系统的系统。发送的信号被提供有用于训练接收机和/或正在通信的发射机的前同步码。测量接收信号的质量并将其与阈值进行比较。如果质量高于或低于所述阈值，则分别使用短前导码处理或长前导码处理。可以使用具有不同长度的多于一个阈值和相关联的前导码对。

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