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21. 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。

22. 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。

23. 发明授权

US08984508B2 System and method for restarting a workload based on global load balancing 有权
标题翻译：基于全局负载平衡重新启动工作负载的系统和方法
公开(公告)号：US08984508B2
公开(公告)日：2015-03-17
申请号：US13151862
申请日：2011-06-02
申请人： Guoqiang Shu , Keith Farkas , Eddie Ma , Michael Nelson , Elisha Ziskind , Sridhar Rajagopal , Minwen Ji
发明人： Guoqiang Shu , Keith Farkas , Eddie Ma , Michael Nelson , Elisha Ziskind , Sridhar Rajagopal , Minwen Ji
IPC分类号： G06F9/455 , G06F9/46 , G06F9/48 , G06F9/50
CPC分类号： G06F9/4818 , G06F9/45558 , G06F9/5077 , G06F2009/45575
摘要： A method for restarting a virtual machine in a virtual computing system having a plurality of hosts and a resource scheduler for the plurality of hosts includes writing a placement request for the virtual machine to a shared channel that is accessible by the resource scheduler. The method further includes reading a placement result from the shared channel, wherein the placement result is generated by the resource scheduler responsive to the placement request; and restarting the virtual machine in accordance with the placement result.
摘要翻译：一种用于在具有多个主机和多个主机的资源调度器的虚拟计算系统中重新启动虚拟机的方法包括将虚拟机的放置请求写入由资源调度器可访问的共享信道。所述方法还包括从所述共享信道读取布置结果，其中所述布局结果由所述资源调度器响应于所述放置请求而生成; 并根据放置结果重新启动虚拟机。

24. 发明授权

US08521034B2 Apparatus and method for interference mitigation and channel selection for visible light communication 有权
标题翻译：用于可见光通信的干扰减轻和信道选择的装置和方法
公开(公告)号：US08521034B2
公开(公告)日：2013-08-27
申请号：US12584135
申请日：2009-09-01
申请人： Sridhar Rajagopal , Farooq Khan
发明人： Sridhar Rajagopal , Farooq Khan
IPC分类号： H04B10/00 , H04B10/08 , H04J14/02
CPC分类号： H04J14/0227 , H04B10/1129 , H04B10/1143 , H04B10/1149 , H04B10/116
摘要： A device and method for device association, interference mitigation and channel selection for use in a visible light communication (VLC) network. The method includes transmitting on every one of a plurality of supported color channels of a first device to estimate an ambient interference on each supported color channel. The method also includes receiving a transmission on at least some of the supported color channels, where the number of receiving color channels is less than or equal to the number of supported color channels of the transmitter. The method further includes calculating a channel quality index for each of the receiving color channels. The method still further includes selecting at least one of the receiving color channels of the first device to be used as a communication channel. The method also includes reporting the at least one communication channel to a second device in the VLC network. In certain embodiments, the method includes establishing guard color channels for each of the supported color channels.
摘要翻译：用于可见光通信（VLC）网络中的设备关联，干扰减轻和信道选择的设备和方法。该方法包括在第一设备的多个支持的彩色通道中的每一个上发送以估计每个支持的颜色通道上的环境干扰。所述方法还包括在至少一些所支持的颜色通道上接收传输，其中接收颜色通道的数量小于或等于发射机所支持的颜色通道的数量。该方法还包括为每个接收颜色通道计算信道质量指数。该方法还包括选择要用作通信信道的第一设备的接收彩色通道中的至少一个。该方法还包括将至少一个通信信道报告给VLC网络中的第二设备。在某些实施例中，该方法包括为每个所支持的颜色通道建立保护颜色通道。

25. 发明授权

US08495476B2 System and method for coding and interleaving for short frame support in visible light communication 有权
标题翻译：用于可见光通信中的短帧支持的编码和交织的系统和方法
公开(公告)号：US08495476B2
公开(公告)日：2013-07-23
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： G06F11/00
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。

26. 发明申请

US20130051486A1 MULTIPLE ANTENNA TRANSMISSION WITH PER-ANTENNA POWER CONSTRAINTS 有权
标题翻译：具有天线功率约束的多天线传输
公开(公告)号：US20130051486A1
公开(公告)日：2013-02-28
申请号：US13595811
申请日：2012-08-27
申请人： Zhouyue Pi , Omar EI Ayach , Sridhar Rajagopal , Shadi Abu-Surra
发明人： Zhouyue Pi , Omar EI Ayach , Sridhar Rajagopal , Shadi Abu-Surra
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04B7/0465 , H04B7/02 , H04B7/0426 , H04B7/043 , H04B7/0617 , H04B7/0897 , H04L27/2626 , H04W52/225 , H04W52/30 , H04W52/42
摘要： A method, apparatus, and system to transmit signals using multiple antennas with per-antenna power constraints. The method includes initializing a precoding algorithm to a complex matrix. The precoding algorithm is for precoding signals transmitted by a plurality of antennas. The method includes iteratively processing the precoding algorithm on a per-antenna basis by, at each iteration, sequentially updating a precoder for each of the plurality of antennas. The method includes, after each iteration, determining whether the precoding algorithm has converged based on a change in a rate of mutual information across iterations. Additionally, the method includes, in response to determining that the precoding algorithm has converged, transmitting the signals using the precoding algorithm.
摘要翻译：一种使用具有每天线功率约束的多个天线发射信号的方法，装置和系统。该方法包括将预编码算法初始化为复数矩阵。预编码算法用于预编码由多个天线发送的信号。该方法包括在每个天线的基础上迭代地处理预编码算法，在每个迭代中，顺序地更新多个天线中的每个天线的预编码器。该方法包括在每次迭代之后，基于跨越迭代的互信息速率的变化来确定预编码算法是否已经收敛。此外，该方法包括响应于确定预编码算法已经收敛，使用预编码算法发送信号。

27. 发明申请

US20120278801A1 MAINTAINING HIGH AVAILABILITY OF A GROUP OF VIRTUAL MACHINES USING HEARTBEAT MESSAGES 有权
标题翻译：使用心跳信息维护一组虚拟机的高可用性
公开(公告)号：US20120278801A1
公开(公告)日：2012-11-01
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： G06F9/455
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从属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。

28. 发明授权

US08265194B2 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：US08265194B2
公开(公告)日：2012-09-11
申请号：US11114646
申请日：2005-04-25
申请人： Matthew B. Shoemake , Sridhar Rajagopal , David G. Brenner
发明人： Matthew B. Shoemake , Sridhar Rajagopal , David G. Brenner
IPC分类号： H04L27/00
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

US08144572B2 Detection and mitigation of interference and jammers in an OFDM system 有权
标题翻译：检测和减轻OFDM系统中的干扰和干扰
公开(公告)号：US08144572B2
公开(公告)日：2012-03-27
申请号：US11226654
申请日：2005-09-14
申请人： Matthew B. Shoemake , Sridhar Rajagopal , John D. Terry
发明人： Matthew B. Shoemake , Sridhar Rajagopal , John D. Terry
IPC分类号： H04J11/00
CPC分类号： H04B17/345
摘要： The present invention provides a method and apparatus for detecting interference in a wireless communications system. The invention compares the receiver FFT output of a received signal against known sequences such as the packet synchronization sequence, frame synchronization sequence, and channel estimation sequence. By comparing the reference signal to the known sequences, the invention estimates the instantaneous signal to noise ratio (SNR) for each tone of a wireless transmission. To improve the SNR estimate, the invention computes a weighted average across multiple OFDM symbols. The invention looks for significant increases (spikes) in the SNR as a way of distinguishing interfering signals from noise. The invention can store separate SNR estimates for each transmitter in a wireless network. One embodiment of the invention uses Viterbi branch metrics in conjunction with the estimated SNR to determine the presence of an interfering signal. If interference is detected the invention feeds the inverse of the SNR estimate into the Viterbi decoder or declares and erasure for that symbol.
摘要翻译：本发明提供一种用于检测无线通信系统中的干扰的方法和装置。本发明将接收信号的接收机FFT输出与诸如分组同步序列，帧同步序列和信道估计序列的已知序列进行比较。通过将参考信号与已知序列进行比较，本发明估计无线传输的每个音调的瞬时信噪比（SNR）。为了提高SNR估计，本发明计算跨多个OFDM符号的加权平均。本发明寻找SNR中的显着增加（尖峰）作为区分干扰信号和噪声的一种方式。本发明可以在无线网络中为每个发射机存储单独的SNR估计。本发明的一个实施例使用维特比分支度量结合估计的SNR来确定干扰信号的存在。如果检测到干扰，本发明将SNR估计的逆向馈送到维特比解码器中，或者声明并擦除该符号。

30. 发明申请

US20110064420A1 PREAMBLE DESIGN FOR SUPPORTING MULTIPLE TOPOLOGIES WITH VISIBLE LIGHT COMMUNICATION 有权
标题翻译：用于支持具有可见光通信的多个拓扑的前置设计
公开(公告)号：US20110064420A1
公开(公告)日：2011-03-17
申请号：US12871770
申请日：2010-08-30
申请人： Sridhar Rajagopal , Eun Tae Won , Ying Li
发明人： Sridhar Rajagopal , Eun Tae Won , Ying Li
IPC分类号： H04B10/00
CPC分类号： H04B10/116 , H04B10/1125 , H04B10/1149 , H04L7/041 , H04L7/046
摘要： For use in visible light communication (VLC), methods for synchronization with multiple topology support and for transmitting an extended preamble. The method for synchronization includes transmitting a two-part preamble sequence. The preamble sequence includes one or more repetitions of a fast locking pattern (FLP) configured to be used for clock synchronization, and one or more repetitions of a topology dependent pattern (TDP) configured to be used to distinguish a plurality of VLC topologies. The method for transmitting an extended preamble includes generating an extended preamble and transmitting the extended preamble during a receive or idle mode for maintaining visibility support and for better synchronization performance.
摘要翻译：用于可见光通信（VLC），用于与多个拓扑支持同步并用于发送扩展前同步码的方法。同步的方法包括发送两部分的前导码序列。前导序列包括被配置为用于时钟同步的快速锁定模式（FLP）的一个或多个重复，以及被配置为用于区分多个VLC拓扑的拓扑依赖模式（TDP）的一个或多个重复。用于发送扩展前同步码的方法包括在接收或空闲模式期间生成扩展前导码并发送扩展前同步码，以便维持可视性支持和更好的同步性能。

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