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1. 发明授权

US08830815B2 Preamble design for television white space transmissions 有权
标题翻译：电视空白传输的序言设计
公开(公告)号：US08830815B2
公开(公告)日：2014-09-09
申请号：US13471947
申请日：2012-05-15
申请人： Sameer Vermani , Santosh Paul Abraham , Stephen J. Shellhammer , Albert van Zelst , Didier Johannes Richard van Nee , Vincent Knowles Jones, IV
发明人： Sameer Vermani , Santosh Paul Abraham , Stephen J. Shellhammer , Albert van Zelst , Didier Johannes Richard van Nee , Vincent Knowles Jones, IV
IPC分类号： H04J11/00 , H04L5/00 , H04L29/06 , H04L27/26 , H04W4/00
CPC分类号： H04L69/00 , H04L5/0053 , H04L27/2602 , H04W4/00
摘要： A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.
摘要翻译：提供了一种用于产生具有用于电视白空间传输（TVWS）的前同步码和有效载荷的物理层汇聚协议分组数据单元（PPDU）的方法。 PPDU的符号各自包括128个总共（正交频分复用）OFDM音调或256个总OFDM音调。如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调，如果PPDU的符号包括256个总OFDM音调，则前导码包括具有108个OFDM数据音调的信号（SIG）字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的，使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

2. 发明申请

US20130142176A1 SYSTEMS AND METHODS FOR REDUCING ACKNOWLEDGMENT MESSAGE OVERHEAD 有权
标题翻译：用于减少确认信息的系统和方法
公开(公告)号：US20130142176A1
公开(公告)日：2013-06-06
申请号：US13489075
申请日：2012-06-05
申请人： Maarten Menzo Wentink , Albert Van Zelst, IV
发明人： Maarten Menzo Wentink , Albert Van Zelst, IV
IPC分类号： H04W28/06
CPC分类号： H04W28/065 , H04L1/1607
摘要： Systems, methods, and devices for reducing the overhead required to transmit acknowledgment messages (ACKs) are described herein. In some aspects, the ACKs are reduced in size. In some aspects the ACKs include several short training fields. In some aspects, a receiver of the ACKs can determine the transmitter of the ACK based on when the ACK is received. In some aspects, a receiver of the ACKs can determine the transmitter of the ACK based on information superimposed on the short training fields in the ACK.
摘要翻译：这里描述了用于减少发送确认消息（ACK）所需开销的系统，方法和设备。在一些方面，ACK的大小减小。在某些方面，ACK包括几个短训练场。在一些方面，ACK的接收机可以基于何时接收到ACK来确定ACK的发射机。在一些方面，ACK的接收机可以基于叠加在ACK中的短训练场上的信息来确定ACK的发射机。

3. 发明申请

US20130142130A1 SYSTEMS AND METHODS FOR RECEIVER BASED CLEAR CHANNEL ASSESSMENT 有权
标题翻译：用于基于接收机的清除信道评估的系统和方法
公开(公告)号：US20130142130A1
公开(公告)日：2013-06-06
申请号：US13485558
申请日：2012-05-31
申请人： Maarten Menzo Wentink , Albert Van Zelst
发明人： Maarten Menzo Wentink , Albert Van Zelst
IPC分类号： H04W24/02
CPC分类号： H04W24/02 , H04W28/26 , H04W76/10
摘要： Systems, methods, and devices for performing clear channel assessment at a receiving device are described herein. In some aspects, the receiving device determines whether it is the intended receiver for a data transmission. Upon determining it is the intended receiver, the receiving device transmits a reservation signal. Devices in the vicinity of the receiving device are configured to listen for the reservation signal and refrain from transmitting interfering signals to the receiving device based on the reservation signal.
摘要翻译：这里描述了用于在接收设备处执行清晰信道评估的系统，方法和设备。在一些方面，接收设备确定是否是用于数据传输的预期接收机。在确定它是预期的接收机时，接收设备发送预约信号。接收设备附近的设备被配置为监听预留信号，并且基于预约信号避免向接收设备发送干扰信号。

4. 发明授权

US08432785B2 Flexible SDMA and interference suppression 有权
标题翻译：灵活的SDMA和干扰抑制
公开(公告)号：US08432785B2
公开(公告)日：2013-04-30
申请号：US12860102
申请日：2010-08-20
申请人： Didier Johannes Richard Van Nee , Sameer Vermani , Vincent Knowles Jones, IV , Hemanth Sampath , Albert Van Zelst
发明人： Didier Johannes Richard Van Nee , Sameer Vermani , Vincent Knowles Jones, IV , Hemanth Sampath , Albert Van Zelst
IPC分类号： H04L5/00 , H04B1/10 , H04B15/00 , H04W4/00 , H04J3/16
CPC分类号： H04J11/0036 , H04B7/0452 , H04B7/0617 , H04B7/0619 , H04B7/0626 , H04B7/0634 , H04B7/0658 , H04B7/0697 , H04L25/0224 , H04L25/03012 , H04L25/03343 , H04L2025/03426 , H04L2025/03783 , H04L2025/03802
摘要： Certain aspects of the present disclosure provide a method for performing interference suppression in spatial division multiple access (SDMA) systems. When the number of receive antennas of a receiver is equal or larger than the number of spatial streams intended for the receiver, the receiver may perform interference suppression on the signals received on all of its antennas. In addition, certain aspects of the present disclosure present a flexible SDMA technique in which a plurality of channel estimates that may be received from an explicit feedback or estimated implicitly, are combined. The combined channel estimate may be used in calculating the SDMA weights.
摘要翻译：本公开的某些方面提供了一种用于在空分多址（SDMA）系统中执行干扰抑制的方法。当接收机的接收天线的数量等于或大于用于接收机的空间流的数量时，接收机可对在其所有天线上接收的信号执行干扰抑制。此外，本公开的某些方面呈现灵活的SDMA技术，其中可以从显式反馈或隐含地估计的多个信道估计被组合。组合的信道估计可用于计算SDMA权重。

5. 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。

6. 发明申请

US20120058735A1 SOUNDING FEEDBACK SCHEMES FOR VERY HIGH THROUGHPUT WIRELESS SYSTEMS 有权
标题翻译：非常高的无线系统的响铃反馈方案
公开(公告)号：US20120058735A1
公开(公告)日：2012-03-08
申请号：US13227185
申请日：2011-09-07
申请人： Sameer Vermani , Rahul Tandra , Albert Van Zelst , Didier Johannes Richard Van Nee , Hemanth Sampath , Vincent Knowles Jones, IV
发明人： Sameer Vermani , Rahul Tandra , Albert Van Zelst , Didier Johannes Richard Van Nee , Hemanth Sampath , Vincent Knowles Jones, IV
IPC分类号： H04B7/00
CPC分类号： H04B7/0634 , H04B7/0452 , H04B7/066 , H04L5/0023 , H04L5/0048 , H04L5/0053 , H04L5/006 , H04L5/0064 , H04L25/0248 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03808
摘要： Certain aspects of the present disclosure relate to techniques for transmitting sounding feedback in Very High Throughput (VHT) wireless systems. The sounding feedback may be transmitted from a user station (STA), wherein the feedback may comprise a certain number of beamforming matrices and a certain number of singular values of a wireless channel associated with the STA. Further, the sounding feedback may comprise a bit for indicating whether this feedback represents a Single-User (SU) feedback or a Multi-User (MU) feedback.
摘要翻译：本公开的某些方面涉及用于在超高吞吐量（VHT）无线系统中传输探测反馈的技术。探测反馈可以从用户站（STA）发送，其中反馈可以包括一定数量的波束成形矩阵和与STA相关联的无线信道的一定数量的奇异值。此外，探测反馈可以包括用于指示该反馈是否表示单用户（SU）反馈或多用户（MU））反馈的位。

7. 发明申请

US20100290449A1 PREAMBLE EXTENSIONS 审中-公开
标题翻译：前瞻性延伸
公开(公告)号：US20100290449A1
公开(公告)日：2010-11-18
申请号：US12832766
申请日：2010-07-08
申请人： Didier Johannes Richard van Nee , Albert van Zelst , Hemanth Sampath , Geert Arnout Awater
发明人： Didier Johannes Richard van Nee , Albert van Zelst , Hemanth Sampath , Geert Arnout Awater
IPC分类号： H04L27/00 , H04L27/20 , H04W88/00
CPC分类号： H04L27/2605 , H04B7/0452 , H04B7/0671 , H04B7/0684 , H04L5/0023 , H04L5/0048 , H04L5/0051
摘要： Systems and/or methods for communication that generate a plurality of spatial streams are disclosed. Each of the spatial streams comprises a plurality of symbols. At least a portion of a training sequence is distributed across a first symbol in a first one of the spatial streams and a second symbol in a second one of the spatial streams.
摘要翻译：公开了用于产生多个空间流的通信的系统和/或方法。每个空间流包括多个符号。训练序列的至少一部分分布在空间流中的第一个中的第一个符号和第二个空间流中的第二个符号。

8. 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。

9. 发明申请

US20100208834A1 METHOD AND APPARATUS FOR ORTHOGONAL PILOT TONE MAPPING IN MULTIPLE-IN AND MULTIPLE-OUT (MIMO) AND SPATIAL DIVISION MULTIPLE ACCESS (SDMA) SYSTEMS 有权
标题翻译：用于多入和多出（MIMO）和空间多路访问（SDMA）系统中的正交导频图像的方法和装置
公开(公告)号：US20100208834A1
公开(公告)日：2010-08-19
申请号：US12371366
申请日：2009-02-13
申请人： Albert van Zelst , Richard van Nee
发明人： Albert van Zelst , Richard van Nee
IPC分类号： H04B7/02
CPC分类号： H04B7/0447 , H04B7/0689 , H04L5/0048
摘要： Methods and apparatus for orthogonal pilot tone mapping in Multiple-In and Multiple-Out (MIMO) and Spatial Division Multiple Access (SDMA) systems are disclosed. An aspect of the method includes identifying a plurality of symbol periods within which symbols representing encoded data are to be transmitted in a plurality of spatial streams over a communication channel; identifying a plurality of pilot tone values for a plurality of pilot tones in the plurality of symbol periods to create a pilot tone mapping, wherein the identified pilot tone values are such that a receiver, when receiving at least some of the plurality of pilot tones, is provided with signals enabling the receiver to characterize and mitigate any communication impairments, and potentially obtain transmit spatial stream diversity benefits, wherein at least two of the pilot tone values in the pilot tone mapping are orthogonal when the symbols are combined over at least one dimension; and transmitting the symbols and the plurality of pilot tones over the plurality of spatial streams for the plurality of symbol periods.
摘要翻译：公开了多输入多输出（MIMO）和空分多址（SDMA）系统中的正交导频音调映射的方法和装置。该方法的一个方面包括识别多个符号周期，在多个符号周期内，通过通信信道在多个空间流中发送表示编码数据的符号; 识别多个符号周期中的多个导频音调的多个导频音调值，以创建导频音调映射，其中所识别的导频音调值使得接收机在接收到多个导频音调中的至少一些时，被提供有使得接收机能够表征和减轻任何通信损伤并且潜在地获得发射空间流分集益处的信号，其中当符号在至少一维上被组合时，导频色调映射中的至少两个导频音值是正交的 ; 以及在多个符号周期的多个空间流上发送符号和多个导频音调。

10. 发明申请

US20100046656A1 PREAMBLE EXTENSIONS 审中-公开
公开(公告)号：US20100046656A1
公开(公告)日：2010-02-25
申请号：US12428129
申请日：2009-04-22
申请人： Didier Johannes Richard van Nee , Albert van Zelst , Geert Arnout Awater
发明人： Didier Johannes Richard van Nee , Albert van Zelst , Geert Arnout Awater
IPC分类号： H04B7/02 , H04J3/00
CPC分类号： H04B7/0413 , C08F214/18 , H04B7/0452 , H04B7/0615 , H04B7/0671 , H04B7/068 , H04B7/0684 , H04L5/0023 , H04L5/0048 , H04L5/0051
摘要： Systems and/or methods for communication that generate a plurality of spatial streams are disclosed. Each of the spatial streams comprises a plurality of symbols. At least a portion of a training sequence is distributed across a first symbol in a first one of the spatial streams and a second symbol in a second one of the spatial streams.

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