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21. 发明申请

US20110154155A1 SYSTEM AND METHOD FOR CODING AND INTERLEAVING FOR SHORT FRAME SUPPORT IN VISIBLE LIGHT COMMUNICATION 有权
标题翻译：用于在可见光通信中进行短帧支持的编码和交互的系统和方法
公开(公告)号：US20110154155A1
公开(公告)日：2011-06-23
申请号：US12962324
申请日：2010-12-07
申请人： Shadi Abu-Surra , Sridhar Rajagopal , Eran Pisek
发明人： Shadi Abu-Surra , Sridhar Rajagopal , Eran Pisek
IPC分类号： H03M13/29 , H03M13/07 , G06F11/10
CPC分类号： H03M13/2936 , H03M5/145 , H03M13/1515 , H03M13/2707 , H03M13/6356 , H03M13/6362 , H04B10/116 , H04L1/0042 , H04L1/0047 , H04L1/0057 , H04L1/0059 , H04L1/0065 , H04L1/0068 , H04L1/0071
摘要： A transmitter is capable of performing both Galois Field (GF) (16) and GF (256) encoding in a visual light communication system. The transmitter includes a GF (256) encoder. The transmitter also includes a first bit mapper configured to map a first number of bits to a second number of bits. The Galois Field (256) encoder is configured to receive and encode the second number of bits. The transmitter also includes a second bit mapper configured to map the second number of bits to the first number of bits. The transmitter also includes an interleaver unit that can pad bits based on a frame size and puncture the bits after interleaving and prior to transmission.
摘要翻译：发射机能够在视觉光通信系统中执行Galois Field（GF）（16）和GF（256）编码。发射机包括一个GF（256）编码器。发射机还包括配置成将第一比特数映射到第二比特数的第一比特映射器。伽罗瓦域（256）编码器被配置为接收和编码第二位数。发射机还包括配置成将第二位数映射到第一位数的第二位映射器。发射机还包括交织器单元，其可以基于帧大小来填充比特并且在交织之后和发送之前对比特进行穿孔。

22. 发明申请

US20100284690A1 APPARATUS AND METHOD FOR SUPPORT OF DIMMING IN VISIBLE LIGHT COMMUNICATION 有权
标题翻译：支持在可见光通信中进行调光的装置和方法
公开(公告)号：US20100284690A1
公开(公告)日：2010-11-11
申请号：US12577548
申请日：2009-10-12
申请人： Sridhar Rajagopal , Ying Li
发明人： Sridhar Rajagopal , Ying Li
IPC分类号： H04J14/00 , H04B10/02
CPC分类号： H04B10/116 , H04B10/1149
摘要： A method and system for visible light communication (VLC) for use in a dimmable lighting environment is provided. The method includes transmitting data using light from at least one light source, a brightness of the light reduced below a maximum level. The method also includes compensating or accommodating for the reduced brightness of the light at a VLC circuitry to maintain communication. The method further includes transmitting data to at least one VLC receiver using the light from the at least one light source.
摘要翻译：提供了一种用于可调光照明环境中的可见光通信（VLC）的方法和系统。该方法包括使用来自至少一个光源的光发射数据，光的亮度降低到最大水平以下。该方法还包括补偿或适应在VLC电路处的光的降低的亮度以保持通信。该方法还包括使用来自至少一个光源的光将数据发送到至少一个VLC接收机。

23. 发明授权

US07830782B2 Method of using guard tones in OFDM systems for increasing robustness 有权
标题翻译：在OFDM系统中使用保护音调以提高鲁棒性的方法
公开(公告)号：US07830782B2
公开(公告)日：2010-11-09
申请号：US11125714
申请日：2005-05-10
申请人： Matthew B. Shoemake , Sridhar Rajagopal , Lee Bradshaw
发明人： Matthew B. Shoemake , Sridhar Rajagopal , Lee Bradshaw
IPC分类号： H04J11/00
CPC分类号： H04L1/0059 , H04L1/0041 , H04L1/0069 , H04L1/0071 , H04L27/2602 , H04L27/261
摘要： The present invention provides a method and system for increasing communication robustness between wireless communication devices by transmitting data on Orthogonal Frequency Division Multiplexing (OFDM) guard tones. In one embodiment, punctured bits are sent on the guard tones. In an alternate embodiment, the full bandwidth provided by the guard tones in used to determine the optimal puncture pattern. The present invention can also use guard tones to duplicate data from those tones which are experiencing channel interference. The receiver feeds back information about tones in interference, and the transmitter send the interfered data on the guard tones. Guard tones are used for sending feedback information to the transmitter in order to increase system robustness. This provides the transmitter with information on how to use the guard tones and adapt the transmission data rates to maximize system performance.
摘要翻译：本发明提供一种用于通过在正交频分复用（OFDM）保护音上传送数据来增加无线通信设备之间的通信鲁棒性的方法和系统。在一个实施例中，穿孔位在保护音上发送。在替代实施例中，由保护音提供的用于确定最佳穿刺模式的全带宽。本发明还可以使用保护音来从经历信道干扰的那些音调复制数据。接收机反馈关于干扰中的音调的信息，并且发射机在保护音上发送被干扰的数据。保护音用于向发射机发送反馈信息，以提高系统的鲁棒性。这为发射机提供了有关如何使用保护音调和调整传输数据速率以使系统性能最大化的信息。

24. 发明授权

US07869529B2 System, method and computer-readable medium for detection and avoidance (DAA) of victim services in ultra-wideband systems (UWB) 有权
标题翻译：用于超宽带系统（UWB）中受害者服务的检测和避免（DAA）的系统，方法和计算机可读介质
公开(公告)号：US07869529B2
公开(公告)日：2011-01-11
申请号：US11762659
申请日：2007-06-13
申请人： Sridhar Rajagopal , Brian C. Joseph , Syed N. Ahmed , Yaming Zhang , Sidney B. Schrum, Jr.
发明人： Sridhar Rajagopal , Brian C. Joseph , Syed N. Ahmed , Yaming Zhang , Sidney B. Schrum, Jr.
IPC分类号： H04K1/10
CPC分类号： H04L5/0046 , H04B1/719 , H04L5/0048 , H04L27/0006
摘要： A system for detection and avoidance of victim services in ultra-wideband (UWB) systems is provided. A detect and avoid module may calculate power averages of Orthogonal Frequency Division Multiplexing tones. The power of tones may be measured and compared with power averages of corresponding tones. If a measured tone power exceeds an average power of a corresponding tone by a dynamic threshold, the tone may be identified as associated with an interferer. The threshold may be inversely related to the gain level of an automatic gain control module. The UWB subsystem may be configured with known bands of victim services of other radio frequency systems, and a tone identified as associated with an interferer that is within a known victim service band may be identified as a victim service. The UWB subsystem may attenuate or otherwise suppress transmission within the victim service band to avoid interfering with the victim service.
摘要翻译：提供了一种用于在超宽带（UWB）系统中检测和避免受害者服务的系统。检测和避免模块可以计算正交频分复用音的功率平均值。可以测量音调的功率并将其与相应音调的功率平均值进行比较。如果测量的音调功率超过相应音调的平均功率通过动态阈值，则可以将音调识别为与干扰源相关联。阈值可能与自动增益控制模块的增益电平成反比。 UWB子系统可以配置有其他无线电频率系统的受害者服务的已知频带，并且可以将识别为与已知受害者服务频带内的干扰源相关联的音调识别为受害者服务。 UWB子系统可以衰减或以其他方式抑制受害者服务频带内的传输，以避免干扰受害者服务。

25. 发明授权

US07593339B2 Rate control for packet-based wireless communication 有权
标题翻译：基于分组的无线通信的速率控制
公开(公告)号：US07593339B2
公开(公告)日：2009-09-22
申请号：US11179248
申请日：2005-07-12
申请人： Matthew B. Shoemake , Sridhar Rajagopal
发明人： Matthew B. Shoemake , Sridhar Rajagopal
IPC分类号： H04L12/26
CPC分类号： H04L1/20 , H04L1/0002 , H04L1/0026 , H04L1/1607
摘要： The present invention provides a method and system for controlling the data rate in packet based wireless communications. Then, using the probability of error, the invention calculates the throughput and drop probability for two or more data rates and selects the data rate with highest throughput. In one embodiment of the invention, the probability of error based on information passed back from the receiver regarding decoding errors. In another embodiment, the probability of error is based on acknowledgement packets returned by the receiver.
摘要翻译：本发明提供了一种用于在基于分组的无线通信中控制数据速率的方法和系统。然后，利用错误概率，本发明计算两个或多个数据速率的吞吐量和丢弃概率，并选择吞吐量最高的数据速率。在本发明的一个实施例中，基于从接收机传回关于解码错误的信息的错误概率。在另一个实施例中，错误的概率基于接收机返回的确认分组。

26. 发明申请

US20080189700A1 Admission Control for Virtual Machine Cluster 审中-公开
标题翻译：虚拟机集群的接纳控制
公开(公告)号：US20080189700A1
公开(公告)日：2008-08-07
申请号：US12017258
申请日：2008-01-21
申请人： Rene W. Schmidt , Sridhar Rajagopal
发明人： Rene W. Schmidt , Sridhar Rajagopal
IPC分类号： G06F9/455
CPC分类号： G06F11/203 , G06F9/455 , G06F9/45558 , G06F11/1084 , G06F11/2033 , G06F11/2035 , G06F11/2046 , G06F12/08 , G06F2009/45587
摘要： One embodiment of the present invention is a system including: (a) plural virtualization systems configured as a cluster; (b) a failover system that, responsive to an interruption of, or on, a particular one of the virtualization systems, transitions at least one virtual machine to another virtualization system of the cluster and resumes thereon computations of the transitioned virtual machine; and (c) a management system that tracks, for each virtual machine, a set of resource requirements, the management system admitting virtual machine computations to the cluster based on an admission control policy that, consonant with the resource requirements of virtual machines provisioned to any particular set of virtualization systems, assures sufficient excess capacity on other virtualization systems of the cluster to support, in the event of interruption of the particular set, transition of all virtual machines operative thereon to the other virtualization systems of the cluster.
摘要翻译：本发明的一个实施例是一种系统，包括：（a）配置为集群的多个虚拟化系统; （b）故障切换系统，其响应于所述虚拟化系统中的特定虚拟化系统的中断或在其上，将至少一个虚拟机转换到所述集群的另一个虚拟化系统，并在其上恢复所述转换的虚拟机的计算; 和（c）管理系统，为每个虚拟机跟踪一组资源需求，管理系统基于允许控制策略来接纳虚拟机计算到集群，该准入控制策略符合虚拟机的资源需求，特定的一组虚拟化系统，确保集群的其他虚拟化系统足够的过剩容量，在特定集合的中断的情况下，支持在其上运行的所有虚拟机向群集的其他虚拟化系统的转换。

27. 发明申请

US20060029145A1 Method and apparatus for encoding interleaving and mapping data to facilitate GBPS data rates in wireless systems 有权
标题翻译：用于编码交织和映射数据以便于无线系统中的GBPS数据速率的方法和装置
公开(公告)号：US20060029145A1
公开(公告)日：2006-02-09
申请号：US11114752
申请日：2005-04-25
申请人： Sridhar Rajagopal , Matthew Shoemake , John Terry
发明人： Sridhar Rajagopal , Matthew Shoemake , John Terry
IPC分类号： H04L23/02
CPC分类号： H04L25/4917 , H03M13/2707 , H03M13/4161 , H04L1/0041 , H04L1/0054 , H04L1/006 , H04L1/0069 , H04L1/007 , H04L1/0071 , H04L27/34
摘要： A method and apparatus for encoding data for wireless transmission. The invention includes multi-level coding in which data is partitioned between two encoders, one for encoding Most Significant Bits (MSBs) and the other for encoding Least Significant Bits (LSBs). By partition bits separately for the MSBs and LSBs, the complexity of the decoder may be reduced. The MSBs and LSBs are interleaved such that each MSB is a function of just one LSB, simplifying branch metric selection during Viterbi decoding. This also allows parallel de-interleaving by the receiver, which reduces the interleaving latency of the receiver. A block interleaver jointly optimizes the symbol hamming distance of the symbols and the bit hamming distance of each constituent encoder for the MSBs and LSBs.
摘要翻译：一种用于编码无线传输数据的方法和装置。本发明包括多级编码，其中数据在两个编码器之间分配，一个用于编码最高有效位（MSB），另一个用于编码最低有效位（LSB）。通过分开MSB和LSB的分配位，解码器的复杂度可能会降低。 MSB和LSB被交错，使得每个MSB是仅一个LSB的函数，从而简化维特比解码期间的分支度量选择。这也允许接收机的并行解交织，这降低了接收机的交织等待时间。块交织器共同优化符号的符号汉明距离和每个组成编码器对于MSB和LSB的比特汉明距离。

28. 发明申请

US20050237922A1 Virtual side channels for digital wireless communication systems 有权
标题翻译：用于数字无线通信系统的虚拟侧通道
公开(公告)号：US20050237922A1
公开(公告)日：2005-10-27
申请号：US11114646
申请日：2005-04-25
申请人： Matthew Shoemake , Sridhar Rajagopal , David Brenner
发明人： Matthew Shoemake , Sridhar Rajagopal , David Brenner
IPC分类号： H04J11/00 , H04L27/26
CPC分类号： H04L27/2602
摘要： The present invention provides a method for enabling side channel communication between wireless devices. In one embodiment of the invention the guard tones in wireless OFDM signals are used for side channel communication. In another embodiment of the invention, unused bits in OFDM symbols are used as side channels instead of being padded with zeros or random bits.
摘要翻译：本发明提供了一种用于实现无线设备之间的侧信道通信的方法。在本发明的一个实施例中，无线OFDM信号中的保护音调用于侧信道通信。在本发明的另一实施例中，OFDM符号中的未使用的比特用作侧信道，而不是用零或随机比特填充。

29. 发明授权

US08924967B2 Maintaining high availability of a group of virtual machines using heartbeat messages 有权
标题翻译：使用心跳消息维护一组虚拟机的高可用性
公开(公告)号：US08924967B2
公开(公告)日：2014-12-30
申请号：US13096188
申请日：2011-04-28
申请人： Michael Nelson , Keith Farkas , Elisha Ziskind , Sridhar Rajagopal , Guoqiang Shu , Ron Passerini , Joanne Ren
发明人： Michael Nelson , Keith Farkas , Elisha Ziskind , Sridhar Rajagopal , Guoqiang Shu , Ron Passerini , Joanne Ren
IPC分类号： G06F15/173 , G06F9/455 , G06F9/46 , G06F11/00 , G06F9/54
CPC分类号： G06F11/1438 , G06F9/45533 , G06F9/542 , G06F11/0757
摘要： Embodiments maintain high availability of software application instances in a fault domain. Subordinate hosts are monitored by a master host. The subordinate hosts publish heartbeats via a network and datastores. Based at least in part on the published heartbeats, the master host determines the status of each subordinate host, distinguishing between subordinate hosts that are entirely inoperative and subordinate hosts that are operative but partitioned (e.g., unreachable via the network). The master host may restart software application instances, such as virtual machines, that are executed by inoperative subordinate hosts or that cease executing on partitioned subordinate hosts.
摘要翻译：实施例在故障域中保持软件应用程序实例的高可用性。主机由主机监控。下级主机通过网络和数据存储发布心跳。至少部分地基于所发布的心跳，主主机确定每个从属主机的状态，区分完全不起作用的下级主机和可操作但被分区的下级主机（例如，经由网络不可达）。主主机可以重新启动由不能操作的下属主机执行的软件应用程序实例，例如虚拟机，或者停止在分区的下级主机上执行。

30. 发明申请

US20130057432A1 METHOD AND APPARATUS FOR BEAM BROADENING FOR PHASED ANTENNA ARRAYS USING MULTI-BEAM SUB-ARRAYS 审中-公开
标题翻译：使用多束子阵列的波束天线阵列的波束扩展方法和装置
公开(公告)号：US20130057432A1
公开(公告)日：2013-03-07
申请号：US13558208
申请日：2012-07-25
申请人： Sridhar Rajagopal , Kaushik Josiam , Zhouyue Pi
发明人： Sridhar Rajagopal , Kaushik Josiam , Zhouyue Pi
IPC分类号： H01Q3/24
CPC分类号： H01Q3/26 , H01Q25/002
摘要： A transmitter or receiver may use beamforming methods for transmitting or receiving a signal in a communication system. The method for transmitting includes determining a first beamforming weight associated with a total number of antennas in an antenna array. The method also includes transmitting a first signal in a first beam having a first beam width using the total number of antennas by applying the first predetermined beamforming weight. The method further includes determining a second beamforming weight associated with a first sub-array of antennas in the antenna array and determining a third beamforming weight associated with a second sub-array of antennas in the antenna array. The method still further includes transmitting a second signal in a second beam having a second beam width using the first sub-array of antennas by applying the second beamforming weight and the second sub-array of antennas by applying the third beamforming weight.
摘要翻译：发射机或接收机可以使用波束成形方法在通信系统中发送或接收信号。用于发送的方法包括确定与天线阵列中的天线总数相关联的第一波束成形权重。该方法还包括通过应用第一预定波束形成权重，使用总天线数量在具有第一波束宽度的第一波束中发送第一信号。该方法还包括确定与天线阵列中的天线的第一子阵列相关联的第二波束成形权重，并且确定与天线阵列中的天线的第二子阵列相关联的第三波束成形权重。该方法还包括：通过应用第三波束形成权重应用第二波束形成权重和第二子阵列天线，使用第一天线子阵列在具有第二波束宽度的第二波束中发送第二信号。

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