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1. 发明申请

US20090060078A1 NEAR SOFT-OUTPUT MAXIMUM-LIKELIHOOD DETECTION FOR MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS 有权
标题翻译：几乎输入多输出系统的软输出最大似然检测
公开(公告)号：US20090060078A1
公开(公告)日：2009-03-05
申请号：US11849025
申请日：2007-08-31
申请人： Albert van Zelst , Brian Wong , D.J. Richard van Nee , Vincent K. Jones, IV , Geert Arnout Awater
发明人： Albert van Zelst , Brian Wong , D.J. Richard van Nee , Vincent K. Jones, IV , Geert Arnout Awater
IPC分类号： H04L5/12
CPC分类号： H04L25/0204 , H04L1/0048 , H04L1/06 , H04L25/0242 , H04L25/0246 , H04L25/067 , H04L27/2601
摘要： Systems and methodologies are described that provide low-complexity soft-output detection for MIMO communication systems. Looping can be performed over a set of constellation points per spatial stream to obtain distance metrics for each of a series of transmitted streams, for which values for the other transmitted streams can be estimated using a MIMO channel matrix and a sub-optimal MIMO algorithm. Examples of MIMO algorithms that can be utilized include Per-Stream List Detection (PSLD), Lattice-Reduced Detection (LRD), and a Guided-M Algorithm. Performance can be further improved by pre-processing the MIMO channel matrix and/or by utilizing techniques for Enhanced Metric Usage (EMU).
摘要翻译：描述了为MIMO通信系统提供低复杂度软输出检测的系统和方法。可以在每个空间流的一组星座点上执行循环，以获得一系列发射流中的每一个的距离度量，对于其可以使用MIMO信道矩阵和次优MIMO算法来估计其他发送流的值。可以使用的MIMO算法的示例包括每流列表检测（PSLD），格子减少检测（LRD）和引导M算法。通过预处理MIMO信道矩阵和/或通过利用用于增强度量使用（EMU）的技术，可以进一步改善性能。

2. 发明申请

US20100061402A1 MODIFIED PREAMBLE STRUCTURE FOR IEEE 802.11A EXTENSIONS TO ALLOW FOR COEXISTENCE AND INTEROPERABILITY BETWEEN 802.11A DEVICES AND HIGHER DATA RATE, MIMO OR OTHERWISE EXTENDED DEVICES 有权
标题翻译：用于IEEE 802.11A扩展的改进的前缀结构允许802.11A设备与高数据速率，MIMO或其他扩展设备之间的共同性和互操作性
公开(公告)号：US20100061402A1
公开(公告)日：2010-03-11
申请号：US12552705
申请日：2009-09-02
申请人： Albert van Zelst , Vincent K. Jones , D.J. Richard van Nee
发明人： Albert van Zelst , Vincent K. Jones , D.J. Richard van Nee
IPC分类号： H04J3/24
CPC分类号： H04L27/2613 , H04B7/04 , H04L5/0023 , H04L5/1438 , H04L25/0226 , H04L25/03248 , H04W24/00 , H04W84/12 , H04W88/06 , H04W99/00
摘要： A modified preamble is used by extended devices that operate at higher rates, MIMO or other extensions relative to strict 802.11a-compliant devices. The extended devices might use multiple antenna techniques (MIMO), where multiple data streams are multiplexed spatially and/or multi-channel techniques, where an extended transmitter transmits using more than one 802.11a channel at a time. Such extensions to IEEE 802.11a can exist in extended devices. The modified preamble is usable for signaling, to legacy devices as well as extended devices, to indicate capabilities and to cause legacy devices or extended devices to defer to other devices such that the common communication channel is not subject to unnecessary interference. The modified preamble is also usable for obtaining MIMO channel estimates and/or multi-channel estimates. The modified preamble preferably includes properties that facilitate detection of conventional and/or extended modes (“mode detection”) and provides some level of coexistence with legacy IEEE 802.11a devices.
摘要翻译：经修改的前同步码由相对于严格的符合802.11a标准的设备的较高速率，MIMO或其他扩展操作的扩展设备使用。扩展设备可能使用多个天线技术（MIMO），其中多个数据流在空间和/或多信道技术上复用，其中扩展发射机一次使用多于一个802.11a信道进行发射。 IEEE 802.11a的这种扩展可以存在于扩展设备中。经修改的前导码可用于对传统设备以及扩展设备进行信令，以指示能力并使遗留设备或扩展设备推迟到其他设备，使得公共通信信道不受不必要的干扰。经修改的前导码也可用于获得MIMO信道估计和/或多信道估计。修改的前导码优选地包括便于检测常规和/或扩展模式（“模式检测”）并且提供与传统IEEE 802.11a设备的一些级别共存的属性。

3. 发明申请

US20090238299A1 Detecting the Number of Transmit Antennas in Wireless Communication Systems 有权
标题翻译：检测无线通信系统中发射天线的数量
公开(公告)号：US20090238299A1
公开(公告)日：2009-09-24
申请号：US12469323
申请日：2009-05-20
申请人： Albert van Zelst , Vincent K. Jones , D.J. Richard van Nee
发明人： Albert van Zelst , Vincent K. Jones , D.J. Richard van Nee
IPC分类号： H04B7/02
CPC分类号： H04L27/261 , H04B7/0671 , H04L1/06 , H04L1/0618 , H04L25/0212 , H04L25/0226 , H04L27/2613 , H04W16/14 , H04W24/00 , H04W84/12 , H04W88/06 , H04W99/00
摘要： To detect the number of transmit antennas, a fast Fourier transform operation is performed on the received samples of the transmitted long training symbols of a preamble. Next, each of the Fourier transformed results is multiplied with the reference frequency-domain representation of the long training symbol so as to remove the effect of the symbols and to maintain the channel information. Next, inverse Fourier transform or least squares operations is performed on the multiplied values to compute channel impulse response. The number of shifted impulse response in the channel impulse response represents the detected number of transmit antennas. Packets containing preambles of the present invention may be received by extended devices as well as by legacy receivers that are not configured to receive and interpret these preambles. The training symbols may be cyclically-shifted and transmitted on different transmit antennas.
摘要翻译：为了检测发送天线的数量，对前导码的发送的长训练符号的接收样本执行快速傅里叶变换操作。接下来，将每个傅立叶变换结果乘以长训练符号的参考频域表示，以便消除符号的影响并维持频道信息。接下来，对乘法值执行逆傅里叶变换或最小二乘法运算以计算信道脉冲响应。信道脉冲响应中移位脉冲响应的数量表示检测到的发射天线数。包含本发明的前导码的分组可以由扩展设备以及未被配置为接收和解释这些前同步码的传统接收机接收。训练符号可以循环移位并在不同的发射天线上发射。

4. 发明授权

US08462867B2 Near soft-output maximum-likelihood detection for multiple-input multiple-output systems 有权
标题翻译：多输入多输出系统的近似软输出最大似然检测
公开(公告)号：US08462867B2
公开(公告)日：2013-06-11
申请号：US11849025
申请日：2007-08-31
申请人： Albert van Zelst , Brian Wong , D. J. Richard van Nee , Vincent K. Jones, IV , Geert Arnout Awater
发明人： Albert van Zelst , Brian Wong , D. J. Richard van Nee , Vincent K. Jones, IV , Geert Arnout Awater
IPC分类号： H04L5/12
CPC分类号： H04L25/0204 , H04L1/0048 , H04L1/06 , H04L25/0242 , H04L25/0246 , H04L25/067 , H04L27/2601
摘要： Systems and methodologies are described that provide low-complexity soft-output detection for MIMO communication systems. Looping can be performed over a set of constellation points per spatial stream to obtain distance metrics for each of a series of transmitted streams, for which values for the other transmitted streams can be estimated using a MIMO channel matrix and a sub-optimal MIMO algorithm. Examples of MIMO algorithms that can be utilized include Per-Stream List Detection (PSLD), Lattice-Reduced Detection (LRD), and a Guided-M Algorithm. Performance can be further improved by pre-processing the MIMO channel matrix and/or by utilizing techniques for Enhanced Metric Usage (EMU).
摘要翻译：描述了为MIMO通信系统提供低复杂度软输出检测的系统和方法。可以在每个空间流的一组星座点上执行循环，以获得一系列发射流中的每一个的距离度量，对于其可以使用MIMO信道矩阵和次优MIMO算法来估计其他发送流的值。可以使用的MIMO算法的示例包括每流列表检测（PSLD），格子减少检测（LRD）和引导M算法。通过预处理MIMO信道矩阵和/或通过利用用于增强度量使用（EMU）的技术，可以进一步改善性能。

5. 发明申请

US20100008318A1 SYSTEMS AND METHODS FOR PROVIDING A SEPARATE CONTENTION WINDOW ALLOWING ALLOCATIONS FOR PENDING UPLINK SDMA TRANSMISSION OPPORTUNITIES 有权
标题翻译：提供单独内容窗口的系统和方法允许分配上传SDMA传输机会
公开(公告)号：US20100008318A1
公开(公告)日：2010-01-14
申请号：US12501026
申请日：2009-07-10
申请人： Maarten Menzo Wentink , Albert van Zelst , Geert Arnout Awater , Gregory Steele , James Gardner , Didier Johannes Richard van Nee , Vincent K. Jones, IV
发明人： Maarten Menzo Wentink , Albert van Zelst , Geert Arnout Awater , Gregory Steele , James Gardner , Didier Johannes Richard van Nee , Vincent K. Jones, IV
IPC分类号： H04W4/00
CPC分类号： H04W74/006 , H04B7/0452 , H04W72/04 , H04W72/046 , H04W74/08 , H04W84/12
摘要： A method for providing uplink spatial division multiple access (SDMA) transmission opportunities (TXOP) is described. A demarcation indication may be sent to one or more subscriber stations. An SDMA contention window may be started. An allocation indication may be received. Requested uplink SDMA TXOP resources may be allocated according to the allocation indication.
摘要翻译：描述了一种用于提供上行链路空分多址（SDMA）传输机会（TXOP）的方法。分界指示可以发送到一个或多个订户站。可以启动SDMA竞争窗口。可以接收分配指示。可以根据分配指示来分配所请求的上行链路SDMA TXOP资源。

6. 发明授权

US08374274B2 Methods and systems using norm approximation for maximum likelihood MIMO decoding 有权
标题翻译：使用范数近似的最大似然MIMO解码的方法和系统
公开(公告)号：US08374274B2
公开(公告)日：2013-02-12
申请号：US12351820
申请日：2009-01-10
申请人： Jong Hyeon Park , Matthias Brehler , Brian Clarke Banister , Albert van Zelst , Tae Ryun Chang , Vincent K. Jones , Je Woo Kim
发明人： Jong Hyeon Park , Matthias Brehler , Brian Clarke Banister , Albert van Zelst , Tae Ryun Chang , Vincent K. Jones , Je Woo Kim
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L25/03171 , H04L5/0023 , H04L25/03197 , H04L25/03331 , H04L2025/03414 , H04L2025/03426
摘要： Certain embodiments of the present disclosure provide techniques for approximate computation of l2 norms as a part of the maximum likelihood (ML) detection: tri-maxmin, maxsum and sortsum algorithms. The proposed approximation schemes show better accuracy than conventional approximation schemes—the abssum and maxmin algorithms, while the computational complexity is very similar. The error rate performance of the ML detection that utilizes proposed norm-approximation techniques are very close to the reference ML detection with exact calculation of l2 norms, while the computational complexity is significantly smaller.
摘要翻译：本公开的某些实施例提供了作为最大似然（ML）检测的一部分近似计算l2范数的技术：tri-maxmin，maxsum和sortsum算法。所提出的近似方案显示出比传统的近似方案更好的精度 - abssum和maxmin算法，而计算复杂度非常相似。利用提出的范数近似技术的ML检测的误码率性能与精确计算l2范数的参考ML检测非常接近，而计算复杂度显着更小。

7. 发明授权

US07792208B2 Pilot tones in a multi-transmit OFDM system usable to capture transmitter diversity benefits 有权
标题翻译：可用于捕获发射机分集优势的多发射OFDM系统中的导频音调
公开(公告)号：US07792208B2
公开(公告)日：2010-09-07
申请号：US12119268
申请日：2008-05-12
申请人： Albert van Zelst , Vincent K. Jones
发明人： Albert van Zelst , Vincent K. Jones
IPC分类号： H04B7/08
CPC分类号： H04L1/0625 , H04B7/04 , H04B7/0667 , H04B7/10 , H04K1/10 , H04L5/0023 , H04L5/0048 , H04L5/006 , H04L5/0064 , H04L25/0204 , H04L25/0226 , H04L27/3488
摘要： In a wireless transmitter having a plurality of spatial streams differentiable at a receiver, wherein data is encoded and transmitted over a communication channel with pilot tones to provide the receiver with information about the effects of the communication channel and/or transmitter impairments and/or receiver impairments on the spatial streams transmitted, the benefits can be provided by identifying a plurality of symbol periods within which symbols representing some of the encoded data are to be transmitted, identifying pilot tone values for the plurality of symbol periods, wherein the identified pilot tone values are such that the receiver, when receiving at least some of the pilot tones having the identified pilot tone values, is provided with signals enabling the receiver to characterize the communication channel and/or transmitter impairments and/or receiver impairments to obtain transmit stream diversity gain, and transmitting the symbols and the pilot tones over the plurality of spatial streams for the plurality of symbol periods. In some embodiments, the pilot tones are orthogonal over space and time or over space and time and frequency, while in others they are semi-orthogonal. Pilot tone values might be of a constant amplitude and phase shifted, or might also have amplitude variations wherein at least two pilot tones are nonzero for spatial streams for a given symbol period.
摘要翻译：在具有在接收机可微分的多个空间流的无线发射机中，其中通过具有导频音调的通信信道对数据进行编码和发送，以向接收机提供关于通信信道和/或发射机损伤和/或接收机的影响的信息对发送的空间流的损伤，可以通过识别多个符号周期来提供益处，在多个符号周期内将表示一些编码数据的符号发送，识别多个符号周期的导频音值，其中所识别的导频音调值使得接收机在接收到具有所识别的导频音值的至少一些导频音时，被提供有使得接收机能够表征通信信道和/或发射机损伤和/或接收机损伤以获得发射流分集增益的信号并且通过多个传输符号和导频音调的多个符号周期的空间流。在一些实施例中，导频音调在空间和时间上或在空间和时间和频率上是正交的，而在另一些实施例中，它们是半正交的。导频音调值可能具有恒定幅度和相移，或者也可能具有振幅变化，其中对于给定符号周期，空间流的至少两个导频音调不为零。

8. 发明授权

US07599332B2 Modified preamble structure for IEEE 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, MIMO or otherwise extended devices 有权
标题翻译：用于IEEE 802.11a扩展的修改的前导码结构，以允许802.11a设备和更高数据速率，MIMO或其他扩展设备之间的共存和互操作性
公开(公告)号：US07599332B2
公开(公告)日：2009-10-06
申请号：US11140349
申请日：2005-05-27
申请人： Albert van Zelst , Vincent K. Jones , D. J. Richard van Nee
发明人： Albert van Zelst , Vincent K. Jones , D. J. Richard van Nee
IPC分类号： H04Q7/00
CPC分类号： H04L27/261 , H04B7/0671 , H04L1/06 , H04L1/0618 , H04L25/0212 , H04L25/0226 , H04L27/2613 , H04W16/14 , H04W24/00 , H04W84/12 , H04W88/06 , H04W99/00
摘要： A modified preamble is used by extended devices that operate at higher rates, MIMO or other extensions relative to strict 802.11a-compliant devices. The extended devices might use multiple antenna techniques (MIMO), where multiple data streams are multiplexed spatially and/or multi-channel techniques, where an extended transmitter transmits using more than one 802.11a channel at a time. Such extensions to IEEE 802.11a can exist in extended devices. The modified preamble is usable for signaling, to legacy devices as well as extended devices, to indicate capabilities and to cause legacy devices or extended devices to defer to other devices such that the common communication channel is not subject to unnecessary interference. The modified preamble is also usable for obtaining MIMO channel estimates and/or multi-channel estimates. The modified preamble preferably includes properties that facilitate detection of conventional and/or extended modes (“mode detection”) and provides some level of coexistence with legacy IEEE 802.11a devices.
摘要翻译：经修改的前同步码由相对于严格的符合802.11a标准的设备的较高速率，MIMO或其他扩展操作的扩展设备使用。扩展设备可能使用多个天线技术（MIMO），其中多个数据流在空间和/或多信道技术上复用，其中扩展发射机一次使用多于一个802.11a信道进行发射。 IEEE 802.11a的这种扩展可以存在于扩展设备中。经修改的前导码可用于对传统设备以及扩展设备进行信令，以指示能力并使遗留设备或扩展设备推迟到其他设备，使得公共通信信道不受不必要的干扰。经修改的前导码也可用于获得MIMO信道估计和/或多信道估计。修改的前导码优选地包括便于检测常规和/或扩展模式（“模式检测”）并且提供与传统IEEE 802.11a设备的一些级别共存的属性。

9. 发明申请

US20080279306A1 PILOT TONES IN A MULTI-TRANSMIT OFDM SYSTEM USABLE TO CAPTURE TRANSMITTER DIVERSITY BENEFITS 有权
标题翻译：用于捕获发射机多样性优势的多发射OFDM系统中的引导音调
公开(公告)号：US20080279306A1
公开(公告)日：2008-11-13
申请号：US12119268
申请日：2008-05-12
申请人： Albert van Zelst , Vincent K. Jones
发明人： Albert van Zelst , Vincent K. Jones
IPC分类号： H04L25/03
CPC分类号： H04L1/0625 , H04B7/04 , H04B7/0667 , H04B7/10 , H04K1/10 , H04L5/0023 , H04L5/0048 , H04L5/006 , H04L5/0064 , H04L25/0204 , H04L25/0226 , H04L27/3488
摘要： In a wireless transmitter having a plurality of spatial streams differentiable at a receiver, wherein data is encoded and transmitted over a communication channel with pilot tones to provide the receiver with information about the effects of the communication channel and/or transmitter impairments and/or receiver impairments on the spatial streams transmitted, the benefits can be provided by identifying a plurality of symbol periods within which symbols representing some of the encoded data are to be transmitted, identifying pilot tone values for the plurality of symbol periods, wherein the identified pilot tone values are such that the receiver, when receiving at least some of the pilot tones having the identified pilot tone values, is provided with signals enabling the receiver to characterize the communication channel and/or transmitter impairments and/or receiver impairments to obtain transmit stream diversity gain, and transmitting the symbols and the pilot tones over the plurality of spatial streams for the plurality of symbol periods. In some embodiments, the pilot tones are orthogonal over space and time or over space and time and frequency, while in others they are semi-orthogonal. Pilot tone values might be of a constant amplitude and phase shifted, or might also have amplitude variations wherein at least two pilot tones are nonzero for spatial streams for a given symbol period.
摘要翻译：在具有在接收机可微分的多个空间流的无线发射机中，其中通过具有导频音调的通信信道对数据进行编码和发送，以向接收机提供关于通信信道和/或发射机损伤和/或接收机的影响的信息对发送的空间流的损伤，可以通过识别多个符号周期来提供益处，在多个符号周期内将表示一些编码数据的符号发送，识别多个符号周期的导频音值，其中所识别的导频音调值使得接收机在接收到具有所识别的导频音值的至少一些导频音时，被提供有使得接收机能够表征通信信道和/或发射机损伤和/或接收机损伤以获得发射流分集增益的信号并且通过多个传输符号和导频音调的多个符号周期的空间流。在一些实施例中，导频音调在空间和时间上或在空间和时间和频率上是正交的，而在另一些实施例中，它们是半正交的。导频音调值可能具有恒定幅度和相移，或者也可能具有振幅变化，其中对于给定符号周期，空间流的至少两个导频音调不为零。

10. 发明授权

US08743837B2 Modified preamble structure for IEEE 802.11A extensions to allow for coexistence and interoperability between 802.11A devices and higher data rate, MIMO or otherwise extended devices 有权
标题翻译：用于IEEE 802.11A扩展的修改的前导码结构，以允许802.11A设备和较高数据速率，MIMO或其他扩展设备之间的共存和互操作性
公开(公告)号：US08743837B2
公开(公告)日：2014-06-03
申请号：US12552705
申请日：2009-09-02
申请人： Albert van Zelst , D. J. Richard van Nee , Vincent K. Jones
发明人： Albert van Zelst , D. J. Richard van Nee , Vincent K. Jones
IPC分类号： H04Q7/00
CPC分类号： H04L27/2613 , H04B7/04 , H04L5/0023 , H04L5/1438 , H04L25/0226 , H04L25/03248 , H04W24/00 , H04W84/12 , H04W88/06 , H04W99/00
摘要： A modified preamble is used by extended devices that operate at higher rates, MIMO or other extensions relative to strict 802.11a-compliant devices. The extended devices might use multiple antenna techniques (MIMO), where multiple data streams are multiplexed spatially and/or multi-channel techniques, where an extended transmitter transmits using more than one 802.11a channel at a time. Such extensions to IEEE 802.11a can exist in extended devices. The modified preamble is usable for signaling, to legacy devices as well as extended devices, to indicate capabilities and to cause legacy devices or extended devices to defer to other devices such that the common communication channel is not subject to unnecessary interference. The modified preamble is also usable for obtaining MIMO channel estimates and/or multi-channel estimates. The modified preamble preferably includes properties that facilitate detection of conventional and/or extended modes (“mode detection”) and provides some level of coexistence with legacy IEEE 802.11a devices.
摘要翻译：经修改的前同步码由相对于严格的符合802.11a标准的设备的较高速率，MIMO或其他扩展操作的扩展设备使用。扩展设备可能使用多个天线技术（MIMO），其中多个数据流在空间和/或多信道技术上复用，其中扩展发射机一次使用多于一个802.11a信道进行发射。 IEEE 802.11a的这种扩展可以存在于扩展设备中。经修改的前导码可用于对传统设备以及扩展设备进行信令，以指示能力并使遗留设备或扩展设备推迟到其他设备，使得公共通信信道不受不必要的干扰。经修改的前导码也可用于获得MIMO信道估计和/或多信道估计。修改的前导码优选地包括便于检测常规和/或扩展模式（“模式检测”）并且提供与传统IEEE 802.11a设备的一些级别共存的属性。

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