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1. 发明授权

US08081691B2 Detection of interferers using divergence of signal quality estimates 有权
标题翻译：使用信号质量估计的发散检测干扰源
公开(公告)号：US08081691B2
公开(公告)日：2011-12-20
申请号：US12014035
申请日：2008-01-14
申请人： Brian Chadwick Joseph , Sridhar Rajagopal , Syed Nadeem Ahmed , Yaming Zhang
发明人： Brian Chadwick Joseph , Sridhar Rajagopal , Syed Nadeem Ahmed , Yaming Zhang
IPC分类号： H04K1/10
CPC分类号： H04L5/0007 , H04B1/719
摘要： A method, system, and computer-readable medium for detecting an interferer in a wireless communication system are provided. The method includes receiving a signal having P tones, each of the P tones being associated with a frequency, determining a first signal quality of each of the P tones, determining a second signal quality of each of the P tones, and detecting the interferer that occupies the same frequency as one of the P tones based on the respective first signal quality and the respective second signal quality. The first signal quality and second signal quality behave differently when the interferer is present. The detecting the interferer includes determining a discrepancy in the behavior of the first signal quality and the second signal quality.
摘要翻译：提供了一种用于检测无线通信系统中的干扰源的方法，系统和计算机可读介质。该方法包括接收具有P个音调的信号，每个P音调与频率相关联，确定每个P音调的第一信号质量，确定每个P音调的第二信号质量，以及检测该干扰信号基于相应的第一信号质量和相应的第二信号质量，它们占据与P音调之一相同的频率。当干扰源存在时，第一信号质量和第二信号质量的行为不同。检测干扰源包括确定第一信号质量和第二信号质量的行为的差异。

2. 发明申请

US20090180521A1 DETECTION OF INTERFERERS USING DIVERGENCE OF SIGNAL QUALITY ESTIMATES 有权
标题翻译：使用信号质量估计的差异检测干扰器
公开(公告)号：US20090180521A1
公开(公告)日：2009-07-16
申请号：US12014035
申请日：2008-01-14
申请人： Brian Chadwick Joseph , Sridhar Rajagopal , Syed Nadeem Ahmed , Yaming Zhang
发明人： Brian Chadwick Joseph , Sridhar Rajagopal , Syed Nadeem Ahmed , Yaming Zhang
IPC分类号： H04B1/707
CPC分类号： H04L5/0007 , H04B1/719
摘要： A method, system, and computer-readable medium for detecting an interferer in a wireless communication system are provided. The method includes receiving a signal having P tones, each of the P tones being associated with a frequency, determining a first signal quality of each of the P tones, determining a second signal quality of each of the P tones, and detecting the interferer that occupies the same frequency as one of the P tones based on the respective first signal quality and the respective second signal quality. The first signal quality and second signal quality behave differently when the interferer is present. The detecting the interferer includes determining a discrepancy in the behavior of the first signal quality and the second signal quality.
摘要翻译：提供了一种用于检测无线通信系统中的干扰源的方法，系统和计算机可读介质。该方法包括接收具有P个音调的信号，每个P音调与频率相关联，确定每个P音调的第一信号质量，确定每个P音调的第二信号质量，以及检测该干扰信号基于相应的第一信号质量和相应的第二信号质量，它们占据与P音调之一相同的频率。当干扰源存在时，第一信号质量和第二信号质量的行为不同。检测干扰源包括确定第一信号质量和第二信号质量的行为的差异。

3. 发明申请

US20090042525A1 METHOD AND SYSTEM FOR PRECISE TRANSMIT POWER ADJUSTMENT IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中精密发送功率调整的方法与系统
公开(公告)号：US20090042525A1
公开(公告)日：2009-02-12
申请号：US11835924
申请日：2007-08-08
申请人： Sridhar Rajagopal , Brian Chadwick Joseph
发明人： Sridhar Rajagopal , Brian Chadwick Joseph
IPC分类号： H04B1/06
CPC分类号： H04W52/367 , H03G3/3042 , H04B2001/0416 , H04W52/36 , H04W52/362 , H04W52/52
摘要： A method for precise transmit power adjustment in a wide personal area network (WPAN) is provided that includes coarse adjusting a power level of the radio signal by adjusting a gain setting of an amplifier that is used to power the radio signal, and fine adjusting the power level of the radio signal by adjusting a voltage level of an information signal that is provided to the amplifier so that the power level of the radio signal approaches a maximum allowable power level.
摘要翻译：提供了一种在广域网（WPAN）中进行精确发射功率调整的方法，包括通过调整用于为无线电信号供电的放大器的增益设置来粗略地调整无线电信号的功率电平，并且微调通过调整提供给放大器的信息信号的电压电平使得无线电信号的功率电平接近最大允许功率电平，来产生无线电信号的功率电平。

4. 发明授权

US08204460B2 Method and system for precise transmit power adjustment in wireless communication systems 有权
标题翻译：无线通信系统中精确发射功率调整的方法和系统
公开(公告)号：US08204460B2
公开(公告)日：2012-06-19
申请号：US11835924
申请日：2007-08-08
申请人： Sridhar Rajagopal , Brian Chadwick Joseph
发明人： Sridhar Rajagopal , Brian Chadwick Joseph
IPC分类号： H01Q11/12 , H04B1/04
CPC分类号： H04W52/367 , H03G3/3042 , H04B2001/0416 , H04W52/36 , H04W52/362 , H04W52/52
摘要： A method for precise transmit power adjustment in a wide personal area network (WPAN) is provided that includes coarse adjusting a power level of the radio signal by adjusting a gain setting of an amplifier that is used to power the radio signal, and fine adjusting the power level of the radio signal by adjusting a voltage level of an information signal that is provided to the amplifier so that the power level of the radio signal approaches a maximum allowable power level.
摘要翻译：提供了一种在广域网（WPAN）中进行精确发射功率调整的方法，包括通过调整用于为无线电信号供电的放大器的增益设置来粗略地调整无线电信号的功率电平，并且微调通过调整提供给放大器的信息信号的电压电平使得无线电信号的功率电平接近最大允许功率电平，来产生无线电信号的功率电平。

5. 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。

6. 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。

7. 发明授权

US08509688B2 Apparatus and method for mac logical channel selection for operating piconets in body area networks 有权
标题翻译：用于在身体区域网络中操作微微网的mac逻辑信道选择的装置和方法
公开(公告)号：US08509688B2
公开(公告)日：2013-08-13
申请号：US12688604
申请日：2010-01-15
申请人： Sridhar Rajagopal , Farooq Khan
发明人： Sridhar Rajagopal , Farooq Khan
IPC分类号： H04B7/00
CPC分类号： H04W72/0426 , H04W16/14 , H04W84/18
摘要： A portable device capable of controlling a piconet selects a logical channel when forming the piconet. The device includes a controller configured to start a first piconet. The controller couples to at least one secondary device in the first piconet. The portable device also includes a transmitter configured to communicate with the at least one secondary device via a wireless communication channel. The controller is configured to select communication channel resources based at least in part on resources allocated to a second piconet in order to mitigate interference between the piconets. The controller is configured to form the first piconet to operate in either a non-interference mode when the controller is able to establish communications with a second controller in the second piconet or a coexistence interference mitigation mode when the controller is unable to establish communications with the second controller in the second piconet.
摘要翻译：能够控制微微网的便携式设备在形成微微网时选择逻辑信道。该设备包括被配置为启动第一微微网的控制器。控制器耦合到第一微微网中的至少一个辅助设备。便携式设备还包括被配置为经由无线通信信道与至少一个辅助设备进行通信的发射机。控制器被配置为至少部分地基于分配给第二微微网的资源来选择通信信道资源，以便减轻微微网之间的干扰。当控制器能够建立与第二微微网中的第二控制器的通信或者当控制器不能建立与第二微微网的建立通信的共存干扰减轻模式时，控制器被配置为形成第一微微网以无干扰模式操作第二个微控制器的第二个控制器。

8. 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。

9. 发明授权

US08374201B2 Preamble design for supporting multiple topologies with visible light communication 有权
标题翻译：序言设计支持可见光通信的多个拓扑
公开(公告)号：US08374201B2
公开(公告)日：2013-02-12
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： H04J3/00
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。

10. 发明申请

US20130028341A1 COMBINING BASEBAND PROCESSING AND RADIO FREQUENCY BEAM STEERING IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中组合基带处理和无线电频率波束转向
公开(公告)号：US20130028341A1
公开(公告)日：2013-01-31
申请号：US13552565
申请日：2012-07-18
申请人： Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra , Zhouyue Pi
发明人： Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra , Zhouyue Pi
IPC分类号： H04B7/02
CPC分类号： H04B7/0478 , H04B7/0456 , H04B7/0465 , H04B7/0617 , H04B7/0626 , H04B7/0632 , H04B7/0639 , H04B7/065 , H04B7/0695 , H04B7/088 , H04L25/0224
摘要： A method and apparatus enable combined baseband (BB) and radio frequency (RF) processing of signals. The method includes receiving, by a receiver, channel estimation information for a channel between a transmitter and the receiver. The method includes identifying a plurality of paths in the channel based on the channel estimation information. The method includes calculating an RF precoding matrix for precoding one or more signals to be transmitted on each of the identified paths. The RF precoding matrix includes a phase shift for each of the identified paths. Additionally, the method includes calculating a BB precoding matrix for precoding the one or more signals by a BB precoding unit associated with the transmitter.
摘要翻译：一种方法和装置使能信号的组合基带（BB）和射频（RF）处理。该方法包括由接收机接收用于发射机和接收机之间的信道的信道估计信息。该方法包括基于信道估计信息识别信道中的多个路径。该方法包括计算一个RF预编码矩阵，用于对每个所识别的路径上要发送的一个或多个信号进行预编码。 RF预编码矩阵包括针对每个所识别的路径的相移。此外，该方法包括：计算BB预编码矩阵，用于通过与发射机相关联的BB预编码单元对一个或多个信号进行预编码。

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