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1. 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。

2. 发明授权

US07184507B2 Residual phase error correction 失效
标题翻译：残余相位误差校正
公开(公告)号：US07184507B2
公开(公告)日：2007-02-27
申请号：US10284646
申请日：2002-10-31
申请人： Menno Mennenga , Frank Poegel , Michael Schmidt
发明人： Menno Mennenga , Frank Poegel , Michael Schmidt
IPC分类号： H04L7/00
CPC分类号： H04L27/0014 , H04L2027/0046 , H04W84/12
摘要： A phase error correction technique in data communication receivers such as WLAN (Wireless Local Area Network) receivers is provided. A signal having a phase error is received, and a phase error correction mechanism having a loop structure is operated on the input signal to correct the phase error. The corrected signal still has a residual phase error. The residual phase error is then compensated taking into account a loop time delay of the loop structure. Further, a phase change rate may be taken into account, and a smoothing process may additionally be performed.
摘要翻译：提供了诸如WLAN（无线局域网）接收机之类的数据通信接收机中的相位误差校正技术。接收到具有相位误差的信号，并且在输入信号上对具有环路结构的相位误差校正机构进行操作以校正相位误差。校正后的信号仍然具有残留相位误差。然后考虑到环路结构的环路时间延迟来补偿剩余相位误差。此外，可以考虑相位变化率，并且可以另外执行平滑处理。

3. 发明申请

US20060034366A1 Low-IF multiple mode digital receiver front end and corresponding method 审中-公开
标题翻译：低中频多模数字接收机前端及相应方法
公开(公告)号：US20060034366A1
公开(公告)日：2006-02-16
申请号：US11181236
申请日：2005-07-14
申请人： Michael Schmidt , Eric Sachse , Menno Mennenga
发明人： Michael Schmidt , Eric Sachse , Menno Mennenga
IPC分类号： H03K9/04
CPC分类号： H04L27/0008
摘要： A data communications technique is provided that may be used in WLAN (Wireless Local Area Network) receivers. Data signals modulated in accordance with one of at least two different modulation schemes are received. The front end of the device has an analog and a digital part, and the digital front end includes a first and a second signal processing branch for processing received data signals modulated in accordance with different modulation schemes. The first and second processing branches have low-IF (Intermediate Frequency) topologies. There is further provided a corresponding integrated circuit chip and a method of processing received data signals.
摘要翻译：提供了可用于WLAN（无线局域网）接收机的数据通信技术。接收根据至少两种不同调制方案之一调制的数据信号。设备的前端具有模拟和数字部分，并且数字前端包括用于处理根据不同调制方案调制的接收数据信号的第一和第二信号处理分支。第一和第二处理分支具有低IF（中频）拓扑。还提供了相应的集成电路芯片和处理接收的数据信号的方法。

4. 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。

5. 发明授权

US07042962B2 LMS-based channel estimation 有权
公开(公告)号：US07042962B2
公开(公告)日：2006-05-09
申请号：US10259715
申请日：2002-09-27
申请人： Michael Schmidt , Menno Mennenga , Thomas Hanusch
发明人： Michael Schmidt , Menno Mennenga , Thomas Hanusch
IPC分类号： H04L27/06
CPC分类号： H04L25/025
摘要： A data communications device and method is provided that apply an LMS (Least Mean Square) channel estimation. A coefficient calculation unit generates a signal that represents at least one channel coefficient that is indicative of a property of the channel such as its finite impulse response. Further, an error calculation unit generates an error signal. Dependent on the error signal, the channel coefficients are updated by performing the LMS algorithm using a step size of two to a negative integer power. This allows for a simple, less complex implementation, and may be applied in a wireless local area network receiver for adjusting filter coefficients.

6. 发明授权

US08223888B2 Method and receiving unit for the detection of data symbols 有权
标题翻译：用于检测数据符号的方法和接收单元
公开(公告)号：US08223888B2
公开(公告)日：2012-07-17
申请号：US11953007
申请日：2007-12-07
申请人： Frank Poegel , Eric Sachse , Michael Schmidt
发明人： Frank Poegel , Eric Sachse , Michael Schmidt
IPC分类号： H04L27/00
CPC分类号： H04B1/707
摘要： A method and device is provided for the detection of data symbols contained in a received radio signal, whereby each data symbol is allocated transmit-side a symbol value-specific PN sequence of successive PN chips in the chip clock and the PN sequences allocated to the data symbols are offset QPSK modulated. The method of the invention for incoherent detection provides for converting the received radio signal into a complex baseband signal sampled in the chip clock, generating a demodulated signal by differential demodulation of the complex baseband signal sampled in the chip clock, providing the derived sequences, calculating correlation results by correlating the demodulated signal with the derived sequences, and deriving, i.e., detecting, the values of the data symbols by evaluating the correlation results. In this case, each derived sequence is assigned to a PN sequence allocable transmit-side and includes derived chips, whose values in each case correspond to a logic linking of particular PN chips of the PN sequence allocable transmit-side that is assigned the derived sequence. The invention relates furthermore to a corresponding receiving unit.
摘要翻译：提供了一种用于检测包含在接收的无线电信号中的数据符号的方法和装置，由此每个数据符号被分配给芯片时钟中的连续PN码元的符号值特定PN序列和分配给数据符号被QPSK调制偏移。用于非相干检测的本发明的方法提供了将接收的无线电信号转换成在芯片时钟采样的复基带信号，通过在芯片时钟采样的复基带信号的差分解调产生解调信号，提供导出的序列，计算通过将解调信号与导出序列进行相关，以及通过评估相关结果推导出数据符号的值来检测相关结果。在这种情况下，将每个派生序列分配给PN序列可分发发射侧，并且包括导出的码片，其值在每种情况下对应于分配了导出序列的PN序列可分发发射端的特定PN码片的逻辑链接。本发明还涉及相应的接收单元。

7. 发明授权

US08526540B2 Method and receiving unit for the detection of data symbols 有权
标题翻译：用于检测数据符号的方法和接收单元
公开(公告)号：US08526540B2
公开(公告)日：2013-09-03
申请号：US13495697
申请日：2012-06-13
申请人： Frank Poegel , Eric Sachse , Michael Schmidt
发明人： Frank Poegel , Eric Sachse , Michael Schmidt
IPC分类号： H04L27/00
CPC分类号： H04B1/707
摘要： A method and device is provided for detecting data symbols in a received radio signal. Each data symbol is allocated transmit-side a symbol value-specific PN sequence of successive PN chips in the chip clock, and the allocated PN sequences are offset QPSK modulated. The method for incoherent detection includes converting the received radio signal into a complex baseband signal sampled in the chip clock, generating a demodulated signal by differential demodulation of the complex baseband signal, calculating correlation results by correlating the demodulated signal with the derived sequences, and deriving the values of the data symbols by evaluating the correlation results. Each derived sequence is assigned to a PN sequence allocable transmit-side and includes derived chips, whose values correspond to a logic linking of particular PN chips of the PN sequence allocable transmit-side that is assigned the derived sequence. The invention relates furthermore to a corresponding receiving unit.
摘要翻译：提供了一种用于检测接收到的无线电信号中的数据符号的方法和装置。每个数据符号在芯片时钟中被分配给发送侧的连续PN码元的符号值专用PN序列，并且所分配的PN序列被偏移QPSK调制。非相干检测方法包括将接收到的无线电信号转换成在芯片时钟采样的复基带信号，通过复基带信号的差分解调产生解调信号，通过将解调信号与导出序列相关来计算相关结果，通过评估相关结果的数据符号的值。每个导出的序列被分配给PN序列可分发发射侧，并且包括导出的码片，其值对应于分配了导出序列的PN序列可分发端侧的特定PN码片的逻辑链路。本发明还涉及相应的接收单元。

8. 发明申请

US20120045016A1 Transmission Circuit and Method for Transmitting a Bit Sequence to be Transmitted 有权
标题翻译：传输电路和发送要发送的位序列的方法
公开(公告)号：US20120045016A1
公开(公告)日：2012-02-23
申请号：US13285998
申请日：2011-10-31
申请人： Michael Schmidt , Frank Poegel , Tilo Ferchland
发明人： Michael Schmidt , Frank Poegel , Tilo Ferchland
IPC分类号： H04L27/00
CPC分类号： H04J13/16 , H04B1/707
摘要： A transmission circuit and method for transmitting a bit sequence to be transmitted is provided that includes a dividing device for dividing the bit sequence into an even-numbered bit sequence and into an odd-numbered bit sequence, a first device for forming the first sampled values of a first fundamental wave depending on the even-numbered bit sequence, a second device for forming second sampled values of a second fundamental wave depending on the odd-numbered bit sequence, the second fundamental wave being shifted relative to the first fundamental wave by a time period, and includes a summator for summation of the first sampled values of the first fundamental wave and the second sampled values of the second fundamental wave to form an output value sequence.
摘要翻译：提供一种用于发送要发送的比特序列的发送电路和方法，其包括用于将比特序列分割为偶数比特序列和奇数比特序列的分割装置，用于形成第一采样值的第一装置取决于偶数比特序列的第一基波的第二装置，用于根据奇数比特序列形成第二基波的第二采样值的第二装置，第二基波相对于第一基波偏移一个并且包括用于求和第一基波的第一采样值和第二基波的第二采样值的求和器，以形成输出值序列。

9. 发明授权

US08050295B2 Transmission circuit and method for transmitting a bit sequence to be transmitted 有权
标题翻译：用于发送要发送的比特序列的发送电路和方法
公开(公告)号：US08050295B2
公开(公告)日：2011-11-01
申请号：US12481269
申请日：2009-06-09
申请人： Michael Schmidt , Frank Poegel , Tilo Ferchland
发明人： Michael Schmidt , Frank Poegel , Tilo Ferchland
IPC分类号： H04L29/02
CPC分类号： H04J13/16 , H04B1/707
摘要： A transmission circuit and method for transmitting a bit sequence to be transmitted is provided that includes a dividing device for dividing the bit sequence into an even-numbered bit sequence and into an odd-numbered bit sequence, a first device for forming the first sampled values of a first fundamental wave depending on the even-numbered bit sequence, a second device for forming second sampled values of a second fundamental wave depending on the odd-numbered bit sequence, the second fundamental wave being shifted relative to the first fundamental wave by a time period, and includes a summator for summation of the first sampled values of the first fundamental wave and the second sampled values of the second fundamental wave to form an output value sequence.
摘要翻译：提供一种用于发送要发送的比特序列的发送电路和方法，其包括用于将比特序列分割为偶数比特序列和奇数比特序列的分割装置，用于形成第一采样值的第一装置取决于偶数比特序列的第一基波的第二装置，用于根据奇数比特序列形成第二基波的第二采样值的第二装置，第二基波相对于第一基波偏移一个并且包括用于求和第一基波的第一采样值和第二基波的第二采样值的求和器，以形成输出值序列。

10. 发明授权

US08406117B2 Transmission circuit and method for transmitting a bit sequence to be transmitted 有权
标题翻译：用于发送要发送的比特序列的发送电路和方法
公开(公告)号：US08406117B2
公开(公告)日：2013-03-26
申请号：US13285998
申请日：2011-10-31
申请人： Michael Schmidt , Frank Poegel , Tilo Ferchland
发明人： Michael Schmidt , Frank Poegel , Tilo Ferchland
IPC分类号： H04J11/00
CPC分类号： H04J13/16 , H04B1/707
摘要： In certain embodiments, a circuitincludes a dividing device configured to divide a transmission bit sequence into a first bit sequence and a second bit sequence, bits adjacent to each other in the transmission bit sequence being separated by a bit time. The circuit includes a first device configured to generate first sampled values by sampling at a sampling rate a first fundamental wave that is based on the first bit sequence, and includes a second device configured to generate second sampled values by sampling at the sampling rate a second fundamental wave that is based on the second bit sequence, the second fundamental wave being shifted relative to the first fundamental wave by a time period. The circuit includes a summator configured to sum the first sampled values of the first fundamental wave and the second sampled values of the second fundamental wave to form an output value sequence.
摘要翻译：在某些实施例中，电路包括被配置为将传输比特序列划分为第一比特序列和第二比特序列的分割装置，所述传输比特序列中彼此相邻的比特位被比特时间分隔。该电路包括第一装置，其被配置为通过以采样率采样基于第一位序列的第一基波来产生第一采样值，并且包括第二装置，其被配置为通过以采样率采样第二采样值基于第二比特序列的基波，第二基波相对于第一基波相移一段时间。该电路包括一个加法器，其被配置为对第一基波的第一采样值和第二基波的第二采样值求和以形成输出值序列。

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