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1. 发明授权

US08811618B2 Fast ciphering key search for WLAN receivers 有权
标题翻译： WLAN接收机的快速加密密钥搜索
公开(公告)号：US08811618B2
公开(公告)日：2014-08-19
申请号：US10899200
申请日：2004-07-26
申请人： Ingo Kuehn , Uwe Eckhardt , Axel Wachtler , Falk Tischer
发明人： Ingo Kuehn , Uwe Eckhardt , Axel Wachtler , Falk Tischer
IPC分类号： H04L29/06
CPC分类号： H04L63/0435 , H04L63/06 , H04W12/02 , H04W12/04 , H04W84/12
摘要： A ciphering key management technique for use in a WLAN receiver is provided where a hash table is stored that has a first and a second table portion. The first table portion stores transmitter address data and the second table portion stores at least one cipher key. It is determined whether a transmitter address matches transmitter address data in the first table portion, and if so, a corresponding cipher key stored in the second table portion is determined for use in decrypting the received data. The hash table technique allows for a fast search for the correct cipher key. Embodiments are described that allow for dynamically adding and removing keys without blocking the search.
摘要翻译：提供了一种在WLAN接收机中使用的加密密钥管理技术，其中存储具有第一和第二表部分的哈希表。第一表部分存储发射机地址数据，第二表部分存储至少一个加密密钥。确定发射机地址是否匹配第一表部分中的发射机地址数据，如果是，则确定存储在第二表部分中的相应密码密钥用于解密所接收的数据。散列表技术允许快速搜索正确的密钥。描述了允许动态地添加和移除键而不阻止搜索的实施例。

2. 发明授权

US07194046B2 Frequency error correction unit and method in a wireless LAN system 有权
标题翻译：无线局域网系统中的频率误差校正单元和方法
公开(公告)号：US07194046B2
公开(公告)日：2007-03-20
申请号：US10184409
申请日：2002-06-27
申请人： Jörg Borowski , Thomas Hanusch , Uwe Eckhardt
发明人： Jörg Borowski , Thomas Hanusch , Uwe Eckhardt
IPC分类号： H03D3/18
CPC分类号： H03J7/02 , H04L27/2332 , H04L2027/003 , H04L2027/0055 , H04L2027/0065 , H04L2027/0095
摘要： A receiving unit in a communication system for receiving a communication signal. The receiving unit is preferably a wireless local area network (WLAN) receiver. The receiving unit comprises a synchronization data detection section and a frequency error correction section. The synchronization data detection section detects predefined synchronization data included in the received communication signal and computes an initial estimate of a frequency error of the received communication signal. The frequency error correction section corrects the frequency of the received communication signal based on frequency error estimates. An initial frequency error estimate used for a first frequency error correction is received from said synchronization data detection.
摘要翻译：一种用于接收通信信号的通信系统中的接收单元。接收单元优选地是无线局域网（WLAN）接收机。接收单元包括同步数据检测部分和频率误差校正部分。同步数据检测部分检测包括在接收的通信信号中的预定同步数据，并计算接收的通信信号的频率误差的初始估计。频率误差校正部分基于频率误差估计校正接收到的通信信号的频率。从所述同步数据检测接收用于第一频率纠错的初始频率误差估计。

3. 发明申请

US20050190919A1 On-the-fly encryption/decryption for WLAN communications 有权
标题翻译： WLAN通信的即时加密/解密
公开(公告)号：US20050190919A1
公开(公告)日：2005-09-01
申请号：US10899199
申请日：2004-07-26
申请人： Matthias Baer , Uwe Eckhardt , Attila Roemer , Ralf Flemming
发明人： Matthias Baer , Uwe Eckhardt , Attila Roemer , Ralf Flemming
IPC分类号： H04L9/00 , H04L9/06 , H04L9/28 , H04L29/06
CPC分类号： H04L63/0457 , H04L63/162 , H04W12/02 , H04W84/12
摘要： A communication device for performing cryptographically secured communication in a WLAN (Wireless Local Area Network) network is provided that comprises a security enhancement unit and a MAC (Medium Access Control) unit. The security enhancement unit is for encrypting plaintext data frames into encrypted data frames and/or decrypting encrypted data frames into plaintext data frames. The MAC unit is for managing communication between communication devices within the WLAN network by coordinating access to a shared wireless communication medium through which communication signals are transmitted. The security enhancement unit and the MAC unit are adapted to perform an on-the-fly encryption process and/or on-the-fly decryption process thereby exchanging the encrypted data frames without buffering the encrypted data frames after encryption or prior to decryption, respectively. The embodiments may provide an improved encryption/decryption architecture including an on-chip memory for performing on-the-fly encryption and/or on-the-fly decryption in the framework of 802.11i security enhancement.
摘要翻译：提供了一种用于在WLAN（无线局域网）网络中执行加密安全通信的通信设备，其包括安全增强单元和MAC（介质访问控制）单元。安全增强单元用于将明文数据帧加密成加密数据帧和/或将加密数据帧解密成明文数据帧。 MAC单元用于通过协调对通过其发送通信信号的共享无线通信介质的访问来管理WLAN网络内的通信设备之间的通信。安全增强单元和MAC单元适于执行即时加密过程和/或即时解密处理，从而分别在加密之后或解密之前对加密数据帧进行交换而不缓冲加密数据帧。这些实施例可以提供包括用于在802.11i安全性增强的框架中执行即时加密和/或即时解密的片上存储器的改进的加密/解密架构。

4. 发明申请

US20050172119A1 Hardware/software partitioning for encrypted WLAN communications 有权
标题翻译：用于加密WLAN通信的硬件/软件分区
公开(公告)号：US20050172119A1
公开(公告)日：2005-08-04
申请号：US10816687
申请日：2004-04-02
申请人： Uwe Eckhardt , Matthias Baer , Ralf Flemming , Steffen Hofmann
发明人： Uwe Eckhardt , Matthias Baer , Ralf Flemming , Steffen Hofmann
IPC分类号： H04K1/02 , H04L9/00 , H04L9/18 , H04L9/28 , H04L9/32 , H04L12/28 , H04L12/56 , H04L29/06
CPC分类号： H04W12/02 , H04K1/02 , H04L9/0631 , H04L9/065 , H04L2209/12 , H04L2209/80 , H04W76/10 , H04W84/12
摘要： A method of performing encrypted WLAN communication is provided that comprises the steps of performing a connection set-up for the encrypted WLAN communication and performing data frame encapsulation and/or decapsulation during the encrypted WLAN communication. The connection set-up is performed by executing software-implemented instructions, and the data frame encapsulation and/or decapsulation is performed by operating single-purpose hardware. In embodiments, corresponding single-purpose hardware devices, integrated circuit chips, computer program products and computer systems are provided. The embodiments may provide an improved hardware/software architecture for 802.11i security enhancement.
摘要翻译：提供了执行加密的WLAN通信的方法，其包括以下步骤：对加密的WLAN通信进行连接建立，并在加密的WLAN通信期间执行数据帧封装和/或解封装。通过执行软件实现的指令来执行连接建立，并且通过操作单用途硬件来执行数据帧封装和/或解封装。在实施例中，提供了相应的单用途硬件设备，集成电路芯片，计算机程序产品和计算机系统。实施例可以提供用于802.11i安全性增强的改进的硬件/软件体系结构。

5. 发明授权

US07190709B2 Early-late correlation for timing error correction in data communication receivers 有权
标题翻译：数据通信接收机定时纠错的早期相关性
公开(公告)号：US07190709B2
公开(公告)日：2007-03-13
申请号：US10464960
申请日：2003-06-19
申请人： Uwe Eckhardt , Jörg Borowski , Tilo Ferchland
发明人： Uwe Eckhardt , Jörg Borowski , Tilo Ferchland
IPC分类号： H04L27/00
CPC分类号： H04L7/007 , H04B1/7085 , H04L7/0029
摘要： A timing error correction technique for use in data communications receivers such as WLAN (Wireless Local Area Network) receivers is provided where an input signal is received that has a timing error, the timing error is corrected, and a signal having a corrected timing error is output. The timing error correction comprises performing an early-late correlation on the signal that has the corrected timing error. The early-late correlation comprises the generation of at least one early and late sample pair, the generation of an error signal that is indicative of the difference between the early and late samples, and the generation of at least one control signal based on the error signal. A time offset correction algorithm is performed dependent on the control signal.
摘要翻译：提供了一种在诸如WLAN（无线局域网）接收机的数据通信接收机中使用的定时误差校正技术，其中接收到具有定时误差的输入信号，定时误差被校正，并且具有校正的定时误差的信号是输出。定时误差校正包括对具有校正的定时误差的信号执行早期相关。早期相关性包括产生至少一个早期和晚期样本对，产生指示早期和晚期样本之间的差异的误差信号，以及基于误差产生至少一个控制信号信号。根据控制信号执行时间偏移校正算法。

6. 发明授权

US07187724B2 Average tracking mechanism in data communications receivers 有权
标题翻译：数据通信接收机的平均跟踪机制
公开(公告)号：US07187724B2
公开(公告)日：2007-03-06
申请号：US10285925
申请日：2002-11-01
申请人： Menno Mennenga , Uwe Eckhardt , Michael Schmidt
发明人： Menno Mennenga , Uwe Eckhardt , Michael Schmidt
IPC分类号： H03K9/00
CPC分类号： H04L27/2647
摘要： An average tracking mechanism for a data communication receiver is provided. The average tracking mechanism of the receiver is connected to receive an input stream of data samples and is adapted to keep track of an average over a predefined number of most recently received data samples. The average tracking mechanism comprises a calculation unit that is adapted to calculate an approximate value of the average and a storage unit for storing calculated approximate values. The calculation unit is adapted to calculate the approximate value by retrieving a previously calculated approximate value from the storage unit and calculating a weighted sum of the retrieved approximate value and a current data sample. The average approximation technique may be used in a comb filter of a preamble detector in a WLAN receiver.
摘要翻译：提供了一种数据通信接收机的平均跟踪机制。接收机的平均跟踪机制被连接以接收数据采样的输入流，并且适于在预定数量的最近接收的数据样本上跟踪平均值。平均跟踪机构包括适于计算平均值的近似值的计算单元和用于存储计算出的近似值的存储单元。计算单元适于通过从存储单元检索先前计算的近似值并计算检索到的近似值和当前数据样本的加权和来计算近似值。平均近似技术可以用在WLAN接收机中的前同步码检测器的梳状滤波器中。

7. 发明申请

US20050220108A1 Frame based MAC control in WLAN communication devices 审中-公开
标题翻译： WLAN通信设备中基于帧的MAC控制
公开(公告)号：US20050220108A1
公开(公告)日：2005-10-06
申请号：US10939859
申请日：2004-09-13
申请人： Ralf Flemming , Matthias Baer , Uwe Eckhardt , Ulrich Hensel , William Kern , Stephan Rosner
发明人： Ralf Flemming , Matthias Baer , Uwe Eckhardt , Ulrich Hensel , William Kern , Stephan Rosner
IPC分类号： G06F11/00 , H04L12/26 , H04L12/28 , H04L12/56 , H04L29/02 , H04L29/06 , H04L29/08
CPC分类号： H04W74/00 , H04L69/22 , H04L69/324 , H04W28/14 , H04W48/16 , H04W84/12 , H04W88/06
摘要： A WLAN (Wireless Local Area Network) communication device and method are provided where a MAC (Medium Access Control) control unit controls access to a wireless medium. The MAC control unit is capable of selectively applying any one of at least two different control mechanisms to data to be transmitted. The data received from a target system comprises data frames, each having associated an individual control header comprising control information. The control information specifies at least one control mechanism to be applied to data of the associated data frame. The MAC control unit extracts control information from each control header associated to a data frame, and selects a control mechanism specified by the extracted control information.
摘要翻译：提供WLAN（无线局域网）通信设备和方法，其中MAC（介质访问控制）控制单元控制对无线介质的访问。 MAC控制单元能够选择性地将至少两个不同的控制机制中的任何一个应用于要发送的数据。从目标系统接收的数据包括数据帧，每个数据帧具有包括控制信息的单个控制报头。控制信息指定要应用于相关联的数据帧的数据的至少一个控制机制。 MAC控制单元从与数据帧相关联的每个控制头提取控制信息，并且选择由所提取的控制信息指定的控制机制。

8. 发明授权

US07627747B2 Hardware/software partitioning for encrypted WLAN communications 有权
标题翻译：用于加密WLAN通信的硬件/软件分区
公开(公告)号：US07627747B2
公开(公告)日：2009-12-01
申请号：US10816687
申请日：2004-04-02
申请人： Uwe Eckhardt , Matthias Baer , Ralf Flemming , Steffen Hofmann
发明人： Uwe Eckhardt , Matthias Baer , Ralf Flemming , Steffen Hofmann
IPC分类号： H04L29/06 , G06F21/00
CPC分类号： H04W12/02 , H04K1/02 , H04L9/0631 , H04L9/065 , H04L2209/12 , H04L2209/80 , H04W76/10 , H04W84/12
摘要： A method of performing encrypted WLAN communication is provided that comprises the steps of performing a connection set-up for the encrypted WLAN communication and performing data frame encapsulation and/or decapsulation during the encrypted WLAN communication. The connection set-up is performed by executing software-implemented instructions, and the data frame encapsulation and/or decapsulation is performed by operating single-purpose hardware. In embodiments, corresponding single-purpose hardware devices, integrated circuit chips, computer program products and computer systems are provided. The embodiments may provide an improved hardware/software architecture for 802.11i security enhancement.
摘要翻译：提供了执行加密的WLAN通信的方法，其包括以下步骤：对加密的WLAN通信进行连接建立，并在加密的WLAN通信期间执行数据帧封装和/或解封装。通过执行软件实现的指令来执行连接建立，并且通过操作单用途硬件来执行数据帧封装和/或解封装。在实施例中，提供了相应的单用途硬件设备，集成电路芯片，计算机程序产品和计算机系统。实施例可以提供用于802.11i安全性增强的改进的硬件/软件体系结构。

9. 发明授权

US07327717B2 Wireless LAN receiver synchronization 有权
标题翻译：无线局域网接收机同步
公开(公告)号：US07327717B2
公开(公告)日：2008-02-05
申请号：US10185354
申请日：2002-06-27
申请人： Jörg Borowski , Uwe Eckhardt , Michael Schmidt , Frank Poegel , Menno Mennenga
发明人： Jörg Borowski , Uwe Eckhardt , Michael Schmidt , Frank Poegel , Menno Mennenga
IPC分类号： H04Q7/24 , H04B1/00 , H04J3/06
CPC分类号： H04L27/0014 , H04B1/7073 , H04B1/70758 , H04B7/0811 , H04L2025/0349 , H04L2027/0065 , H04L2027/0095 , H04W88/08
摘要： A WLAN (Wireless Local Area Network) receiver is provided that provides at least two acquisition units and at least two tracking units. The acquisition units perform a synchronization acquisition process, and the tracking units perform a synchronization tracking process. The acquisition units are arranged for being operated sequentially while the tracking units are arranged for being operated simultaneously. In an embodiment, frequency and phase error correction may be performed separately, and those units that operate at higher sampling rates may be located before lower-rate units. The synchronization process may include data-aided as well as non data-aided algorithms.
摘要翻译：提供了WLAN（无线局域网）接收器，其提供至少两个采集单元和至少两个跟踪单元。采集单元执行同步捕获处理，并且跟踪单元执行同步跟踪处理。采集单元被布置成顺序地操作，而跟踪单元被布置成同时操作。在一个实施例中，可以分别执行频率和相位误差校正，并且以较低速率单元位于较高采样速率下工作的那些单元。同步过程可以包括数据辅助以及非数据辅助算法。

10. 发明授权

US07242711B2 Decision feedback equalizer having reduced gate count 有权
标题翻译：决策反馈均衡器具有减少的门数
公开(公告)号：US07242711B2
公开(公告)日：2007-07-10
申请号：US10464987
申请日：2003-06-19
申请人： Uwe Eckhardt , Michael Schmidt , Eric Sachse
发明人： Uwe Eckhardt , Michael Schmidt , Eric Sachse
IPC分类号： H03H7/40
CPC分类号： H04L25/03057 , H03H17/0294 , H04L2025/0349 , H04L2025/03617
摘要： An improved decision feedback equalization technique is provided that may be used in data communications receivers such as those in WLAN (Wireless Local Area Network) systems. The decision feedback equalizer comprises a feedforward filter that is connected to receive an input data signal and output a filter representation thereof. The feedforward filter has a filter characteristic that depends on filter coefficient data. The decision feedback equalizer further comprises a filter coefficient computation unit for generating the filter coefficient data and outputting the generated data to the feedforward filter. At least one data processing circuit is provided that receives a mode switch signal for switching its operational mode. The data processing circuit is arranged for performing a feedforward filter function in one operational mode and a filter coefficient computation function in another operational mode.
摘要翻译：提供了可用于诸如WLAN（无线局域网）系统中的数据通信接收机的改进的判决反馈均衡技术。判决反馈均衡器包括前馈滤波器，其被连接以接收输入数据信号并输出其滤波器表示。前馈滤波器具有取决于滤波器系数数据的滤波器特性。决策反馈均衡器还包括滤波器系数计算单元，用于产生滤波器系数数据并将生成的数据输出到前馈滤波器。提供至少一个数据处理电路，其接收用于切换其操作模式的模式切换信号。数据处理电路被配置为在一个操作模式下执行前馈滤波器功能，并且在另一操作模式中执行滤波器系数计算功能。

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