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公开(公告)号：US09294941B1
公开(公告)日：2016-03-22
申请号：US14672283
申请日：2015-03-30
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Songping Wu , Quan Zhou , Manyuan Shen , Hongyuan Zhang , Hui-Ling Lou
Abstract: Devices, systems, methods, and other embodiments associated with phase based transformation of repeated signals are described. In one embodiment, an apparatus includes duplication logic configured to duplicate a string of data to form a duplicate string of data. Transformation logic is configured to modify phases associated with the string of data to generate a modified string of data. Signal generation logic is configured to generate a signal for wireless transmission where the signal having at least the modified string of data and the duplicate string of data.
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2.发明授权公开(公告)号：US09107153B1
公开(公告)日：2015-08-11
申请号：US13776538
申请日：2013-02-25
Applicant: Marvell International Ltd.
Inventor： Ming Lin , Songping Wu , Quan Zhou
CPC classification number: H04W56/00 , H04B1/7073 , H04B1/7087 , H04B7/2643 , H04B2201/7073
Abstract: Systems and techniques relating to wireless communications are described. A described technique includes receiving a signal via a wireless channel, performing code synchronization by at least using a peak counter to count peak correlations based on the signal and a known preamble, performing frequency synchronization based on the signal, and using, based on a successful completion of the code synchronization, at least a result of the frequency synchronization to demodulate data from the signal. The technique includes starting the frequency synchronization during the code synchronization when an output value of the peak counter satisfies a predetermined criterion.
Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括经由无线信道接收信号，至少使用峰值计数器来执行代码同步，以基于该信号和已知的前导码对峰值相关性进行计数，基于该信号执行频率同步，并且基于成功 完成代码同步，至少是频率同步的结果来解调来自信号的数据。 该技术包括当峰值计数器的输出值满足预定标准时，在代码同步期间启动频率同步。
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Patent Agency Ranking
公开(公告)号：US08976905B1
公开(公告)日：2015-03-10
申请号：US14169317
申请日：2014-01-31
Applicant: Marvell International Ltd.
Inventor： Quan Zhou , Songping Wu , Hui-Ling Lou
CPC classification number: H04B1/1027 , H03D3/22 , H04L27/0014 , H04L27/156 , H04L27/16
Abstract: A robust differential receiver is described that may be used in any frequency modulated system, including short-range radio frequency (RF) communication devices. The differential receiver provides a preamble detection approach that reduces false preamble detection, a fine carrier frequency (CFO) estimation approach that provides an extended estimation range, and robust in-band and out-of-band interference detection. The described differential receiver assures that preamble detections are not falsely triggered, and that CFO estimates are based on accurately modeled preamble waveforms that have not been distorted by phase ambiguities or in-band distortion. In this manner, the described robust differential receiver assures that CFO estimates used to compensate remaining portions of detected signals are accurate, thereby reducing the likelihood that remaining portions of the detected signal will be affected by phase ambiguity distortions, thereby enhancing the differential receiver's ability to lock onto an otherwise unavailable communication channel, and/or reducing transmission errors and/or packet loss.
Abstract translation: 描述了可用于包括短距离射频（RF）通信设备在内的任何调频系统中的鲁棒差分接收机。 差分接收机提供减少伪前导码检测的前导码检测方法，提供扩展估计范围的精细载波频率（CFO）估计方法以及鲁棒带内和带外干扰检测。 所描述的差分接收器确保前导码检测不被错误触发，并且CFO估计基于没有被相位模糊或带内失真扭曲的精确建模的前导码波形。 以这种方式，所描述的鲁棒差分接收机确保用于补偿检测到的信号的剩余部分的CFO估计是准确的，从而降低检测信号的剩余部分将受相位模糊度失真影响的可能性，从而增强差分接收机的能力 锁定到否则不可用的通信信道，和/或减少传输错误和/或分组丢失。
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公开(公告)号：US09991941B1
公开(公告)日：2018-06-05
申请号：US14451248
申请日：2014-08-04
Applicant: MARVELL INTERNATIONAL LTD.
Inventor： Songping Wu , Manyuan Shen , Quan Zhou , Hongyuan Zhang , Hui-Ling Lou
IPC: H04B7/06 , H04B7/0417 , H01Q3/40 , H01Q3/26
CPC classification number: H04B7/0617 , H01Q3/2605 , H01Q3/40 , H04B7/0417 , H04B7/0634 , H04B7/088
Abstract: A plurality of received signals are received at a first communication device, the plurality of received signals corresponding to at least one training signal having been transmitted by a second communication device a plurality of times via a plurality of antennas by the second communication device applying a respective antenna weight vector from a plurality of different antenna weight vectors each time the at least one training signal is transmitted. The first communication device generates a transmitter antenna weight vector based on a mathematical combination of at least i) the plurality of received signals, ii) the antenna weight vectors applied by the second communication device when transmitting the at least one training signal the plurality of times, and iii) the at least one training signal. The first communication device transmits the transmitter antenna weight vector to the second communication device.
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公开(公告)号：US09356648B1
公开(公告)日：2016-05-31
申请号：US14281012
申请日：2014-05-19
Applicant: Marvell International Ltd.
Inventor： Songping Wu , Quan Zhou , Daxiao Yu
CPC classification number: H04B1/707 , H04B1/69 , H04L27/0014 , H04L27/2071 , H04L27/2331 , H04L27/2655 , H04L27/2659 , H04L27/266 , H04L27/2662 , H04L2027/0026
Abstract: Systems and techniques relating to wireless communications are described. A described technique includes determining a first frequency offset based on a received preamble of a wireless communication signal and a known preamble, the received preamble having been generated based on a spreading sequence and the known preamble, determining a second frequency offset based on the received preamble and the known preamble, and processing at least a portion of the wireless communication signal based on the first frequency offset and the second frequency offset. Determining the first frequency offset can include performing a multi-chip-level differential frequency offset acquisition that uses two or more chips associated with the received preamble. Determining the second frequency offset can include performing a symbol-level differential frequency offset acquisition that uses two or more symbols associated with the received preamble, where each of the two or more symbols are encoded by two or more chips.
Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括基于无线通信信号和已知前导码的接收到的前导码来确定第一频率偏移，所接收的前同步码已经是基于扩展序列和已知的前同步码产生的，基于所接收的前导码确定第二频率偏移 和已知的前导码，以及基于第一频率偏移和第二频率偏移来处理无线通信信号的至少一部分。 确定第一频率偏移可以包括执行使用与所接收的前导码相关联的两个或多个码片的多码片级差分频率偏移获取。 确定第二频率偏移可以包括执行使用与所接收的前导码相关联的两个或多个符号的符号级差分频率偏移获取，其中两个或更多个符号中的每一个由两个或更多个码片编码。
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公开(公告)号：US08989321B1
公开(公告)日：2015-03-24
申请号：US14052927
申请日：2013-10-14
Applicant: Marvell International Ltd.
Inventor： Quan Zhou , Songping Wu , Daxiao Yu
CPC classification number: H04L27/06 , H04L7/042 , H04L27/2613 , H04L27/2657 , H04L27/2663 , H04L27/2671 , H04L27/2675
Abstract: Systems, methods, and other embodiments associated with preamble detection based on repeated preamble codes are described. According to one embodiment, an apparatus is provided that wirelessly receives a signal and calculates a differential output corresponding to a multiplication of the signal and a delayed version of the signal. A cross correlation is performed between the differential output and a known preamble pattern to produce a cross correlation output. One or more peaks are detected in the cross correlation. The detected peaks are used in subsequent processing to detect the known preamble pattern in the wirelessly received signal.
Abstract translation: 描述了基于重复的前导码的与前导码检测相关联的系统，方法和其他实施例。 根据一个实施例，提供了一种无线地接收信号并且计算与信号的乘法和信号的延迟版本相对应的差分输出的装置。 在差分输出和已知前导码模式之间进行互相关以产生互相关输出。 在互相关中检测到一个或多个峰。 检测到的峰值用于随后的处理中以检测无线接收信号中的已知前导码模式。
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公开(公告)号：US08797212B1
公开(公告)日：2014-08-05
申请号：US13898247
申请日：2013-05-20
Applicant: Marvell International Ltd.
Inventor： Songping Wu , Manyuan Shen , Quan Zhou , Hongyuan Zhang , Hui-Ling Lou
CPC classification number: H04B7/0617 , H01Q3/2605 , H01Q3/40 , H04B7/0417 , H04B7/0634 , H04B7/088
Abstract: A plurality of received signals are received at a first communication device, the plurality of received signals corresponding to at least one training signal having been transmitted by a second communication device a plurality of times via a plurality of antennas by the second communication device applying a respective antenna weight vector from a plurality of different antenna weight vectors each time the at least one training signal is transmitted. The first communication device generates a transmitter antenna weight vector based on a mathematical combination of at least i) the plurality of received signals, ii) the antenna weight vectors applied by the second communication device when transmitting the at least one training signal the plurality of times, and iii) the at least one training signal. The first communication device transmits the transmitter antenna weight vector to the second communication device.
Abstract translation: 多个接收信号在第一通信设备处被接收，所述多个接收信号对应于由第二通信设备多次通过第二通信设备经由多个天线发送的至少一个训练信号，所述第二通信设备应用相应的 每次发送至少一个训练信号时，来自多个不同的天线权重向量的天线权重向量。 第一通信设备基于至少i）多个接收信号的数学组合生成发射机天线权重向量，ii）当第二通信设备在多次发送至少一个训练信号时施加的天线权重向量 ，和iii）所述至少一个训练信号。 第一通信设备向第二通信设备发送发射机天线加权矢量。
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