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1. 发明申请

US20070223605A1 METHOD AND APPARATUS FOR CORRECTING SAMPLER CLOCK FREQUENCY OFFSET IN OFDM MIMO SYSTEMS 失效
标题翻译：在OFDM MIMO系统中校正采样时钟频偏的方法和装置
公开(公告)号：US20070223605A1
公开(公告)日：2007-09-27
申请号：US11681341
申请日：2007-03-02
申请人： Peter Voltz , Robert Olesen , I-Tai Lu , Chang-Soo Koo , Qingyuan Dai , Yongwen Yang , Hui-Yuan Teng
发明人： Peter Voltz , Robert Olesen , I-Tai Lu , Chang-Soo Koo , Qingyuan Dai , Yongwen Yang , Hui-Yuan Teng
IPC分类号： H04K1/10
CPC分类号： H04L27/2662 , H04L5/0023 , H04L25/0244 , H04L27/0014 , H04L27/266 , H04L27/2672
摘要： In an orthogonal frequency division multiplexed (OFDM) multiple-in multiple-out (MIMO) wireless communication system, a method for correcting sampler clock frequency offset in a receiver comprises acquiring the frequency offset and symbol timing in a received signal by the receiver. The estimated value of a fractional offset is computed, and a correction in the frequency domain based upon the estimated value of the fractional offset is performed.
摘要翻译：在正交频分多路复用（OFDM）多输入多输出（MIMO）无线通信系统中，用于在接收机中校正采样器时钟频率偏移的方法包括：由接收机获取接收信号中的频率偏移和符号定时。计算分数偏移的估计值，并且基于分数偏移的估计值执行频域中的校正。

2. 发明申请

US20070211822A1 METHOD AND APPARATUS FOR IMPLEMENTING SPACE TIME PROCESSING WITH UNEQUAL MODULATION AND CODING SCHEMES 有权
标题翻译：用不平等调制和编码方案实现空间时间处理的方法和装置
公开(公告)号：US20070211822A1
公开(公告)日：2007-09-13
申请号：US11621755
申请日：2007-01-10
申请人： Robert Olesen , Eldad Zeira , Peter Voltz , Yongwen Yang , Qingyuan Dai , Chang-Soo Koo , I-Tai Lu , KunJu Tsai
发明人： Robert Olesen , Eldad Zeira , Peter Voltz , Yongwen Yang , Qingyuan Dai , Chang-Soo Koo , I-Tai Lu , KunJu Tsai
IPC分类号： H04L27/00 , H04L1/02
CPC分类号： H04L1/0643 , H04B7/0456 , H04B7/0619 , H04B7/0626 , H04B7/0669 , H04B7/0697 , H04B7/0837 , H04B7/0891 , H04B17/336 , H04L1/0003 , H04L1/0009 , H04L1/0606 , H04L1/0625 , H04L1/0631 , H04L27/2626 , H04L27/2647 , H04W84/12
摘要： A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.
摘要翻译：公开了一种用于实现具有不等调制和编码方案（MCS）或流依赖MCS的空间处理的方法和装置。输入数据可以被解析成多个数据流，并且对数据流执行空间处理以产生多个空间流。独立地选择每个数据流的MCS。空间流通过多个发射天线发射。可以对空间时间块编码（STBC），空间频率块编码（SFBC），准正交Alamouti编码，时间反转空间时间块编码，线性空间处理和循环延迟分集（CDD）的技术中的至少一种进行数据/空间流。然后可以将天线映射矩阵应用于空间流。空间流通过多个发射天线发射。可以基于与数据流相关联的每个空间流的信噪比来确定每个数据流的MCS。

3. 发明申请

US20070053452A1 METHOD AND APPARATUS FOR ESTIMATING SIGNAL-TO-NOISE RATIO, NOISE POWER, AND SIGNAL POWER 有权
标题翻译：用于估计信号噪声比，噪声功率和信号功率的方法和装置
公开(公告)号：US20070053452A1
公开(公告)日：2007-03-08
申请号：US11461658
申请日：2006-08-01
申请人： Chang-Soo Koo , Peter Voltz , I-Tai Lu , Qingyuan Dai , Robert Olesen
发明人： Chang-Soo Koo , Peter Voltz , I-Tai Lu , Qingyuan Dai , Robert Olesen
IPC分类号： H04K1/10 , H04L1/02 , H04L27/08
CPC分类号： H04L27/2613 , H04B17/336
摘要： In a wireless communication system, a method and apparatus for noise estimation of a received OFDM communication signal, wherein the signal comprises a data frame with a preamble having at least one long training field (LTF) containing two substantially similar OFDM symbols, comprise examining the LTF for substantially similar OFDM symbols. The noise power in the signal is estimated and the received signal power is measured. The signal to noise ratio is calculated and the signal power is determined by subtracting the noise power from the signal noise.
摘要翻译：在无线通信系统中，一种用于接收的OFDM通信信号的噪声估计的方法和装置，其中所述信号包括具有前导码的数据帧，前导码具有包含两个基本上相似的OFDM符号的至少一个长训练场（LTF），包括检查 LTF用于基本相似的OFDM符号。估计信号中的噪声功率并测量接收信号功率。计算信噪比，通过从信号噪声中减去噪声功率来确定信号功率。

4. 发明授权

US08019036B2 Method and apparatus for correcting sampler clock frequency offset in OFDM MIMO systems 失效
标题翻译： OFDM MIMO系统中校准采样器时钟频率偏移的方法和装置
公开(公告)号：US08019036B2
公开(公告)日：2011-09-13
申请号：US11681341
申请日：2007-03-02
申请人： Peter J. Voltz , Robert Lind Olesen , I-Tai Lu , Chang-Soo Koo , Qingyuan Dai , Yongwen E. Yang , Hui-Yuan Teng
发明人： Peter J. Voltz , Robert Lind Olesen , I-Tai Lu , Chang-Soo Koo , Qingyuan Dai , Yongwen E. Yang , Hui-Yuan Teng
IPC分类号： H03D3/24
CPC分类号： H04L27/2662 , H04L5/0023 , H04L25/0244 , H04L27/0014 , H04L27/266 , H04L27/2672
摘要： In an orthogonal frequency division multiplexed (OFDM) multiple-in multiple-out (MIMO) wireless communication system, a method for correcting sampler clock frequency offset in a receiver comprises acquiring the frequency offset and symbol timing in a received signal by the receiver. The estimated value of a fractional offset is computed, and a correction in the frequency domain based upon the estimated value of the fractional offset is performed.
摘要翻译：在正交频分多路复用（OFDM）多输入多输出（MIMO）无线通信系统中，用于在接收机中校正采样器时钟频率偏移的方法包括：由接收机获取接收信号中的频率偏移和符号定时。计算分数偏移的估计值，并且基于分数偏移的估计值执行频域中的校正。

5. 发明授权

US08295401B2 Method and apparatus for implementing space time processing with unequal modulation and coding schemes 有权
标题翻译：用于实现具有不等调制和编码方案的时空处理的方法和装置
公开(公告)号：US08295401B2
公开(公告)日：2012-10-23
申请号：US11621755
申请日：2007-01-10
申请人： Robert Lind Olesen , Eldad M. Zeira , Peter J. Voltz , Yongwen E. Yang , Qingyuan Dai , Chang-Soo Koo , I-Tai Lu , KunJu Tsai
发明人： Robert Lind Olesen , Eldad M. Zeira , Peter J. Voltz , Yongwen E. Yang , Qingyuan Dai , Chang-Soo Koo , I-Tai Lu , KunJu Tsai
IPC分类号： H04L27/00 , H04B7/10
CPC分类号： H04L1/0643 , H04B7/0456 , H04B7/0619 , H04B7/0626 , H04B7/0669 , H04B7/0697 , H04B7/0837 , H04B7/0891 , H04B17/336 , H04L1/0003 , H04L1/0009 , H04L1/0606 , H04L1/0625 , H04L1/0631 , H04L27/2626 , H04L27/2647 , H04W84/12
摘要： A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.
摘要翻译：公开了一种用于实现具有不等调制和编码方案（MCS）或流依赖MCS的空间处理的方法和装置。输入数据可以被解析成多个数据流，并且对数据流执行空间处理以产生多个空间流。独立地选择每个数据流的MCS。空间流通过多个发射天线发射。可以对空间时间块编码（STBC），空间频率块编码（SFBC），准正交Alamouti编码，时间反转空间时间块编码，线性空间处理和循环延迟分集（CDD）的技术中的至少一种进行数据/空间流。然后可以将天线映射矩阵应用于空间流。空间流通过多个发射天线发射。可以基于与数据流相关联的每个空间流的信噪比来确定每个数据流的MCS。

6. 发明授权

US07773681B2 Method and apparatus for estimating signal-to-noise ratio, noise power, and signal power 有权
标题翻译：用于估计信噪比，噪声功率和信号功率的方法和装置
公开(公告)号：US07773681B2
公开(公告)日：2010-08-10
申请号：US11461658
申请日：2006-08-01
申请人： Chang-Soo Koo , Peter J. Voltz , I-Tai Lu , Qingyuan Dai , Robert L. Olesen
发明人： Chang-Soo Koo , Peter J. Voltz , I-Tai Lu , Qingyuan Dai , Robert L. Olesen
IPC分类号： H04K1/10
CPC分类号： H04L27/2613 , H04B17/336
摘要： In a wireless communication system, a method and apparatus for noise estimation of a received OFDM communication signal, wherein the signal comprises a data frame with a preamble having at least one long training field (LTF) containing two substantially similar OFDM symbols, comprise examining the LTF for substantially similar OFDM symbols. The noise power in the signal is estimated and the received signal power is measured. The signal to noise ratio is calculated and the signal power is determined by subtracting the noise power from the signal noise.
摘要翻译：在无线通信系统中，一种用于接收的OFDM通信信号的噪声估计的方法和装置，其中所述信号包括具有前导码的数据帧，前导码具有包含两个基本上相似的OFDM符号的至少一个长训练场（LTF），包括检查 LTF用于基本相似的OFDM符号。估计信号中的噪声功率并测量接收信号功率。计算信噪比，通过从信号噪声中减去噪声功率来确定信号功率。

7. 发明授权

US08553824B2 MIMO slotted aloha (MSA) system 有权
标题翻译： MIMO时隙aloha（MSA）系统
公开(公告)号：US08553824B2
公开(公告)日：2013-10-08
申请号：US12388912
申请日：2009-02-19
申请人： Qingyuan Dai , Charles H. Woloszynski
发明人： Qingyuan Dai , Charles H. Woloszynski
IPC分类号： H04L7/02
CPC分类号： H04W56/001 , H04J3/0605 , H04L27/2656 , H04L27/2657
摘要： A method including receiving at a synchronizing node a first reference frame from a first reference node at a first time and storing a first time value representing the first time, and calculating a timing estimator by subtracting a minimum time value, representing the distance from the synchronizing node to the first reference node, from the first time value. The method includes receiving at the synchronizing node a second reference frame at a second time and transmitting from the synchronizing node to the first reference node a short timing contention time frame. The method includes receiving at the synchronizing node from the first reference node an arrival time value representing the time at which the first reference node received the short timing contention frame and calculating a time drift from the first arrival time value and the second time value and adjusting the timing estimator based on the time drift.
摘要翻译：一种方法，包括在第一时间从第一参考节点在同步节点处接收第一参考帧并且存储表示第一时间的第一时间值，以及通过从表示距离的同步的距离中减去最小时间值来计算定时估计器节点到第一个参考节点，从第一个时间值。该方法包括在第二时间在同步节点处接收第二参考帧，并从同步节点向第一参考节点发送短时间争用时间帧。该方法包括在第一参考节点的同步节点处接收表示第一参考节点接收到短定时竞争帧的时间的到达时间值，并从第一到达时间值和第二时间值计算时间漂移并调整基于时间漂移的定时估计器。

8. 发明申请

US20090207954A1 MIMO SLOTTED ALOHA (MSA) SYSTEM 有权
标题翻译： MIMO SLOTTED ALOHA（MSA）系统
公开(公告)号：US20090207954A1
公开(公告)日：2009-08-20
申请号：US12388912
申请日：2009-02-19
申请人： Qingyuan Dai , Charles H. Woloszynski
发明人： Qingyuan Dai , Charles H. Woloszynski
IPC分类号： H04L7/00 , H04L27/08
CPC分类号： H04W56/001 , H04J3/0605 , H04L27/2656 , H04L27/2657
摘要： A method including receiving at a synchronizing node a first reference frame from a first reference node at a first time and storing a first time value representing the first time, and calculating a timing estimator by subtracting a minimum time value, representing the distance from the synchronizing node to the first reference node, from the first time value. The method includes receiving at the synchronizing node a second reference frame at a second time and transmitting from the synchronizing node to the first reference node a short timing contention time frame. The method includes receiving at the synchronizing node from the first reference node an arrival time value representing the time at which the first reference node received the short timing contention frame and calculating a time drift from the first arrival time value and the second time value and adjusting the timing estimator based on the time drift.
摘要翻译：一种方法，包括在第一时间从第一参考节点在同步节点处接收第一参考帧并且存储表示第一时间的第一时间值，以及通过从表示距离的同步的距离中减去最小时间值来计算定时估计器节点到第一个参考节点，从第一个时间值。该方法包括在第二时间在同步节点处接收第二参考帧，并从同步节点向第一参考节点发送短时间争用时间帧。该方法包括在第一参考节点的同步节点处接收表示第一参考节点接收到短定时竞争帧的时间的到达时间值，并从第一到达时间值和第二时间值计算时间漂移并调整基于时间漂移的定时估计器。

9. 发明授权

US08391399B2 Single carrier waveform system with frequency domain equalization 有权
标题翻译：具有频域均衡的单载波波形系统
公开(公告)号：US08391399B2
公开(公告)日：2013-03-05
申请号：US12610628
申请日：2009-11-02
申请人： Qingyuan Dai , Charles H. Woloszynski , Gregory N. Smith
发明人： Qingyuan Dai , Charles H. Woloszynski , Gregory N. Smith
IPC分类号： H04B15/00
CPC分类号： H04B7/0837 , H04B7/0885 , H04L25/03159 , H04L2025/03426
摘要： A communications system includes one or more antennas and a receiver coupled to the one or more antennas. The one or more antennas are operable to receive a signal transmitted from a transmitter. The receiver includes a combiner that is operable to combine the signals received by the one or more antennas into a combined signal. The signal received by the receiver is a single-carrier waveform comprising a signal field and one or more data fields after the signal field. The signal field indicates a modulation technique of the one or more data fields. The one or more data fields include a first short unique word, a data payload after the second short unique word, and a second short unique word after the data payload.
摘要翻译：通信系统包括一个或多个天线和耦合到一个或多个天线的接收机。一个或多个天线可操作以接收从发射机发射的信号。接收机包括组合器，其可操作以将由一个或多个天线接收的信号组合成组合信号。由接收机接收的信号是包括信号字段和信号字段之后的一个或多个数据字段的单载波波形。信号字段指示一个或多个数据字段的调制技术。一个或多个数据字段包括第一短唯一字，第二短唯一字之后的数据有效载荷，以及数据有效载荷之后的第二短唯一字。

10. 发明申请

US20100290554A1 Single Carrier Waveform System with Frequency Domain Equalization 有权
标题翻译：具有频域均衡的单载波波形系统
公开(公告)号：US20100290554A1
公开(公告)日：2010-11-18
申请号：US12610628
申请日：2009-11-02
申请人： Qingyuan Dai , Charles H. Woloszynski , Gregory N. Smith
发明人： Qingyuan Dai , Charles H. Woloszynski , Gregory N. Smith
IPC分类号： H04B15/00 , H04L27/00 , H04L1/02
CPC分类号： H04B7/0837 , H04B7/0885 , H04L25/03159 , H04L2025/03426
摘要： A communications system includes one or more antennas and a receiver coupled to the one or more antennas. The one or more antennas are operable to receive a signal transmitted from a transmitter. The receiver includes a combiner that is operable to combine the signals received by the one or more antennas into a combined signal. The signal received by the receiver is a single-carrier waveform comprising a signal field and one or more data fields after the signal field. The signal field indicates a modulation technique of the one or more data fields. The one or more data fields include a first short unique word, a data payload after the second short unique word, and a second short unique word after the data payload.
摘要翻译：通信系统包括一个或多个天线和耦合到一个或多个天线的接收机。一个或多个天线可操作以接收从发射机发射的信号。接收机包括组合器，其可操作以将由一个或多个天线接收的信号组合成组合信号。由接收机接收的信号是包括信号字段和信号字段之后的一个或多个数据字段的单载波波形。信号字段指示一个或多个数据字段的调制技术。一个或多个数据字段包括第一短唯一字，第二短唯一字之后的数据有效载荷，以及数据有效载荷之后的第二短唯一字。

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