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1. 发明申请

WO2010124298A2 I/Q IMBALANCE ESTIMATION AND COMPENSATION FOR A TRANSMITTER AND A RECEIVER 审中-公开
标题翻译： I / Q发射机和接收机的不平等估计和补偿
公开(公告)号：WO2010124298A2
公开(公告)日：2010-10-28
申请号：PCT/US2010/032458
申请日：2010-04-26
申请人： QUALCOMM Incorporated , METREAUD, Leon T. , INANOGLU, Hakan , ZHANG, Xiangdong , CHEN, Zhenqi
发明人： METREAUD, Leon T. , INANOGLU, Hakan , ZHANG, Xiangdong , CHEN, Zhenqi
IPC分类号： H04L27/00
CPC分类号： H04L27/0014 , H04L27/364 , H04L27/3863 , H04L2027/0016
摘要： Techniques for performing inphase/quadrature (I/Q) imbalance estimation and compensation are described. In one exemplary design, I/Q imbalances in a receiver may be estimated by (i) applying a continuous wave signal at different frequencies to the receiver and (ii) processing I and Q input samples from the receiver to determine I/Q imbalances at different frequencies. In another exemplary design, I/Q imbalances may be estimated by (i) downconverting an input RF signal with an LO signal that is offset in frequency from the input RF signal, (ii) transforming I and Q input samples from the receiver to the frequency domain to obtain I and Q symbols, and (iii) determining I/Q imbalances based on the I and Q symbols. In one exemplary design, I/Q imbalances may be corrected by compensating for frequency-dependent and frequency-independent I/Q imbalances separately. I/Q imbalances in a transmitter may also be estimated and compensated.
摘要翻译：描述了执行同相/正交（I / Q）不平衡估计和补偿的技术。在一个示例性设计中，可以通过（i）将不同频率的连续波信号应用于接收机来估计接收机中的I / Q不平衡，以及（ii）处理来自接收机的I和Q输入样本以确定I / Q不平衡不同的频率。在另一示例性设计中，I / Q不平衡可以通过以下方式来估计：（i）利用从输入RF信号偏移频率的LO信号来下变频输入RF信号，（ii）将I和Q输入样本从接收机变换到频域以获得I和Q符号，以及（iii）基于I和Q符号来确定I / Q不平衡。在一个示例性设计中，可以通过分别补偿频率相关和频率独立的I / Q不平衡来校正I / Q不平衡。也可以估计和补偿发射机中的I / Q不平衡。

2. 发明申请

WO2009088528A2 I/Q IMBALANCE ESTIMATION AND CORRECTION IN A COMMUNICATION SYSTEM 审中-公开
标题翻译：通信系统中的I / Q不平衡估计和校正
公开(公告)号：WO2009088528A2
公开(公告)日：2009-07-16
申请号：PCT/US2008/067166
申请日：2008-06-16
申请人： QUALCOMM Incorporated , INANOGLU, Hakan , METREAUD, Leon , WALLACE, Mark S. , ZHANG, Xiangdong
发明人： INANOGLU, Hakan , METREAUD, Leon , WALLACE, Mark S. , ZHANG, Xiangdong
IPC分类号： H04L27/38
CPC分类号： H04L27/0014 , H04L27/2626 , H04L27/2647 , H04L27/364 , H04L27/3863 , H04L2027/0016 , H04L2027/0022 , H04L2027/0024

3. 发明申请

WO2013052277A2 ADAPTIVE TUNING OF AN IMPEDANCE MATCHING CIRCUIT IN A WIRELESS DEVICE 审中-公开
标题翻译：无线设备中的阻抗匹配电路的自适应调谐
公开(公告)号：WO2013052277A2
公开(公告)日：2013-04-11
申请号：PCT/US2012/056131
申请日：2012-09-19
申请人： QUALCOMM Incorporated , SEE, Puay Hoe , ZHANG, Xiangdong
发明人： SEE, Puay Hoe , ZHANG, Xiangdong
CPC分类号： H04B1/0458 , H03H7/40 , H04B1/18
摘要： Techniques for adaptively tuning an impedance matching circuit are disclosed. In an aspect, the impedance matching circuit is pre-characterized. The performance of the impedance matching circuit is determined for multiple settings of the impedance matching circuit, stored in memory, and used to tune the impedance matching circuit. In another aspect, the impedance matching circuit is tuned based on measurements for one or more parameters such as delivered power, return loss, power amplifier current, antenna/load impedance, etc. In an exemplary design, an apparatus includes a memory and a control unit. The memory stores information for multiple settings of an impedance matching circuit. The control unit selects one of the multiple settings of the impedance matching circuit based on the information for the multiple settings and measurements for the impedance matching circuit. The impedance matching circuit performs impedance matching for a load circuit (e.g., an antenna) based on the selected setting.
摘要翻译：公开了用于自适应调谐阻抗匹配电路的技术。在一方面，阻抗匹配电路是预先表征的。阻抗匹配电路的性能决定于阻抗匹配电路的多个设置，存储在存储器中，并用于调谐阻抗匹配电路。在另一方面，基于对一个或多个参数（例如传送功率，回波损耗，功率放大器电流，天线/负载阻抗等）的测量来调整阻抗匹配电路。在示例性设计中，设备包括存储器和控制单元。存储器存储用于阻抗匹配电路的多个设置的信息。控制单元基于阻抗匹配电路的多重设置和测量的信息来选择阻抗匹配电路的多个设置之一。阻抗匹配电路基于所选择的设置对负载电路（例如，天线）执行阻抗匹配。

4. 发明申请

WO2006041652A3 REMOTE FRONT-END FOR A MULTI-ANTENNA STATION 审中-公开
公开(公告)号：WO2006041652A3
公开(公告)日：2006-04-20
申请号：PCT/US2005/034182
申请日：2005-09-22
申请人： QUALCOMM Incorporated , ZHANG, Xiangdong , WALTON, Jay Rodney
发明人： ZHANG, Xiangdong , WALTON, Jay Rodney
IPC分类号： H04B1/18 , H04B1/48 , H04B7/06
摘要： A multi-antenna station has multiple remote front-ends coupled to multiple antennas. Each remote front-end includes a power amplifier (PA), a low noise amplifier (LNA), and first and second coupling units. On the transmit path, a first RF signal is received via a first port, routed by the first coupling unit to the power amplifier, amplified to obtain the desired output power level, and routed by the second coupling unit to a second port for transmission via the antenna. On the receive path, a second RF signal is received via the second port, routed by the second coupling unit to the LNA, amplified to obtain a higher signal level, and routed by the first coupling unit to the first port for transmission to the transceiver.

5. 发明申请

WO2013040272A2 IMPEDANCE MATCHING CIRCUITS WITH MULTIPLE CONFIGURATIONS 审中-公开
标题翻译：具有多种配置的阻抗匹配电路
公开(公告)号：WO2013040272A2
公开(公告)日：2013-03-21
申请号：PCT/US2012/055251
申请日：2012-09-13
申请人： QUALCOMM Incorporated , SEE, Puay Hoe , ZHANG, Xiangdong
发明人： SEE, Puay Hoe , ZHANG, Xiangdong
IPC分类号： H03H7/38
CPC分类号： H03F1/56 , H03H7/38
摘要： Reconfigurable impedance matching circuits with multiple configurations are disclosed. A reconfigurable impedance matching circuit may be implemented with a set of reactive elements (e.g., inductors and/or capacitors) and a set of switches. Different configurations may be obtained with different settings of the switches and may be associated with different impedance tuning curves. This may enable the reconfigurable impedance matching circuit to provide better impedance matching for a load circuit (e.g., an antenna). In an exemplary design, the reconfigurable impedance matching circuit includes at least one variable reactive element configured to tune the impedance of the reconfigurable impedance matching circuit in order to provide better impedance matching. In an exemplary design, the reconfigurable impedance matching circuit may include at least one reconfigurable reactive element, each of which can be connected as a series element or a shunt element.
摘要翻译：公开了具有多种配置的可重新配置的阻抗匹配电路。可以用一组无功元件（例如，电感器和/或电容器）和一组开关来实现可重新配置的阻抗匹配电路。不同的配置可以通过开关的不同设置来获得，并且可以与不同的阻抗调谐曲线相关联。这可以使可重新配置的阻抗匹配电路能够为负载电路（例如，天线）提供更好的阻抗匹配。在示例性设计中，可重新配置的阻抗匹配电路包括至少一个可变电抗元件，其被配置为调整可重新配置的阻抗匹配电路的阻抗以便提供更好的阻抗匹配。在示例性设计中，可重新配置的阻抗匹配电路可以包括至少一个可重新配置的电抗元件，其中的每一个可以被连接为串联元件或分流元件。

6. 发明申请

WO2006094255A1 RADIATED POWER CONTROL FOR A MULTI-ANTENNA TRANSMISSION 审中-公开
标题翻译：用于多天线传输的放大功率控制
公开(公告)号：WO2006094255A1
公开(公告)日：2006-09-08
申请号：PCT/US2006/007811
申请日：2006-03-02
申请人： QUALCOMM INCORPORATED , WALTON, Jay, Rodney , ZHANG, Xiangdong
发明人： WALTON, Jay, Rodney , ZHANG, Xiangdong
IPC分类号： H04B7/005
CPC分类号： H04W52/42
摘要： To meet a radiated power limit, a transmitting station determines a synthesized antenna pattern based on steering vectors used for spatial processing and estimates an array gain based on the synthesized antenna pattern. Different spatial processing modes (e.g., eigensteering and spatial spreading) result in different synthesized antenna patterns. The array gain may be estimated based on the spatial processing mode used for the data transmission and applicable parameters (e.g., eigenvalues) for that mode. An element gain for each antenna used for data transmission may also be estimated. The transmitting station then limits the transmit power for the data transmission based on the array gain, the element gain, and the radiated power limit, which may be an effective isotropic radiated power (EIRP) limit imposed by a regulatory agency.
摘要翻译：为了满足辐射功率限制，发射站基于用于空间处理的导向矢量来确定合成天线方向图，并且基于合成天线方向估计阵列增益。不同的空间处理模式（例如，本征导向和空间扩展）导致不同的合成天线方向图。可以基于用于数据传输的空间处理模式和用于该模式的适用参数（例如，特征值）来估计阵列增益。也可以估计用于数据传输的每个天线的元素增益。然后，发射站基于阵列增益，元件增益和辐射功率限制限制数据传输的发射功率，其可以是由监管机构施加的有效的各向同性辐射功率（EIRP）极限。

7. 发明申请

WO2009117708A1 STEPPED GAIN MIXER 审中-公开
标题翻译： STEPPED增益混合器
公开(公告)号：WO2009117708A1
公开(公告)日：2009-09-24
申请号：PCT/US2009/037885
申请日：2009-03-20
申请人： QUALCOMM INCORPORATED , WANG, Xinwei , ZHANG, Xiangdong
发明人： WANG, Xinwei , ZHANG, Xiangdong
IPC分类号： H03D7/14 , H03D7/12
CPC分类号： H03D7/1441 , H03D7/125 , H03D7/1458 , H03D7/1466 , H03D7/1491 , H03D7/165 , H03D2200/0025
摘要： An amplified stepped gain mixer portion improves the signal-to-noise ratio of a receiver by using multiple gain states to improve linearity. The mixer portion includes an amplifier, a switch and two transistors. The amplifier output is coupled to the sources of the two transistors. An oscillating signal is present on the transistor gates. The transistor drains are coupled to one another through the switch when the switch is closed. The mixer portion operates in two modes. In a 1/2 mode, the mixer portion output current flows only through the first transistor and not through the second transistor because the switch is open. In a 2/2 mode, the mixer portion output current flows through both transistors. The mixer portion is configured such that the switch is closed when a switching signal is asserted. The switching signal is asserted when a bit of a mixer control register is written to.
摘要翻译：放大的阶梯式增益混频器部分通过使用多个增益状态来改善接收机的信噪比以改善线性度。混频器部分包括放大器，开关和两个晶体管。放大器输出耦合到两个晶体管的源极。振荡信号存在于晶体管栅极上。当开关关闭时，晶体管漏极通过开关彼此耦合。混频器部分以两种模式工作。在1/2模式下，由于开关断开，混频器部分的输出电流仅流过第一晶体管而不通过第二晶体管。在2/2模式中，混频器部分输出电流流过两个晶体管。混频器部分被配置成当断言切换信号时开关闭合。当混频器控制寄存器的位被写入时，切换信号被置位。

8. 发明申请

WO2007121285A2 DETECTION OF STATIONS FOR WIRELESS COMMUNICATION 审中-公开
标题翻译：无线通信站的检测
公开(公告)号：WO2007121285A2
公开(公告)日：2007-10-25
申请号：PCT/US2007/066492
申请日：2007-04-12
申请人： QUALCOMM Incorporated , ZHANG, Xiangdong , WALLACE, Mark S. , WALTON, Jay Rodney
发明人： ZHANG, Xiangdong , WALLACE, Mark S. , WALTON, Jay Rodney
IPC分类号： H04L29/06
CPC分类号： H04W8/005 , H04W52/0216 , H04W84/12 , H04W84/18 , Y02D70/142 , Y02D70/22 , Y02D70/24 , Y02D70/25
摘要： Techniques for detecting other stations in a power efficient manner are described. A station may operate in a passive mode or a search mode. In the passive mode, the station receives for one receive period in each time interval. In the search mode, the station transmits for a series of transmit periods in one time interval, then receives for one receive period in the next time interval, and repeats the transmit/receive cycle. In an example scenario, station A operates in the search mode and sends a series of transmissions during its transmit periods. Station B operates in the passive mode, receives a transmission from station A during its receive period, switches to the search mode, and sends a series of transmissions for one time interval. Station A receives a transmission from station B during its receive period. After detecting one another, stations A and B may perform synchronization.
摘要翻译：描述了用于以功率高效的方式检测其他站的技术。一个电台可以工作在被动模式或搜索模式。在被动模式下，电台在每个时间间隔内接收一个接收周期。在搜索模式下，站在一个时间间隔内发送一系列发送周期，然后在下一个时间间隔内接收一个接收周期，并重复发送/接收周期。在一个示例场景中，站点A在搜索模式下运行，并在其发送时段内发送一系列传输。站B工作在被动模式下，接收来自站A在其接收周期内的传输，切换到搜索模式，并发送一系列传输一个时间间隔。 A站在接收期间接收来自B站的传输。在彼此检测之后，站点A和B可以执行同步。

9. 发明申请

WO2016115135A1 DISK GROUP BASED BACKUP 审中-公开
标题翻译：基于盘组的备份
公开(公告)号：WO2016115135A1
公开(公告)日：2016-07-21
申请号：PCT/US2016/013051
申请日：2016-01-12
申请人： ZHANG, Xiangdong , MUTALIK, Madhav , PALAPARTHI, Satya, Sri, Kanth , GOTTEMUKKULA, Yeganjaiah , KUMAR, Sachindra , TEKADE, Uday
发明人： ZHANG, Xiangdong , MUTALIK, Madhav , PALAPARTHI, Satya, Sri, Kanth , GOTTEMUKKULA, Yeganjaiah , KUMAR, Sachindra , TEKADE, Uday
IPC分类号： G06F17/00
CPC分类号： G06F11/1451 , G06F11/1453 , G06F11/1456 , G06F11/1469 , G06F17/30306 , G06F17/30312 , G06F2201/80 , G06F2201/84
摘要： Systems and methods for backing up clustered databases such that production backups associated with the clustered databases are restorable with near zero downtime. First data indicative of a backup request of a clustered database is transmitted by a first computing device to a second computing device. The first computing device maps the backup staging disks to each of a plurality of nodes. The second computing device adds the mapped staging disks to a backup staging diskgroup on a primary node. The second computing device mounts the backup staging diskgroup to each of the plurality of nodes. The second computing device executes a full backup from at least one of the plurality of nodes to the backup staging diskgroup. The second computing device transmits a catalog of backup information to a database associated with the first computing device. The first computing device creates a snapshot of the first backup staging disk.
摘要翻译：用于备份群集数据库的系统和方法，使得与集群数据库相关联的生产备份可在几乎零的停机时间恢复。指示群集数据库的备份请求的第一数据由第一计算设备发送到第二计算设备。第一计算设备将备份分段盘映射到多个节点中的每一个节点。第二个计算设备将映射的暂存磁盘添加到主节点上的备份暂存磁盘组。第二计算设备将备份分段磁盘组安装到多个节点中的每个节点。第二计算设备执行从多个节点中的至少一个节点到备份分段磁盘组的完整备份。第二计算设备将备份信息的目录发送到与第一计算设备相关联的数据库。第一个计算设备创建第一个备份分段磁盘的快照。

10. 发明申请

WO2016044403A1 COPY DATA TECHNIQUES 审中-公开
标题翻译：复制数据技术
公开(公告)号：WO2016044403A1
公开(公告)日：2016-03-24
申请号：PCT/US2015/050391
申请日：2015-09-16
申请人： MUTALIK, Madhav , ZHANG, Xiangdong , TEKADE, Uday , GROOSE, Brian , KUMAR, Sachindra
发明人： ZHANG, Xiangdong , TEKADE, Uday , GROOSE, Brian , KUMAR, Sachindra
IPC分类号： G06F17/30
CPC分类号： G06F11/1451 , G06F3/0619 , G06F3/0641 , G06F3/065 , G06F3/067 , G06F3/0683 , G06F11/1435 , G06F11/1453 , G06F11/1456 , G06F11/1461 , G06F11/1464 , G06F17/30215 , G06F17/30371 , G06F2201/84 , H04L41/5003
摘要： Systems and methods of performing backup of databases and associated logs with one schedule such that a backup of both a database and its associated log can be restored or recovered to a desired point in time. A backup request associated with a backup type is received and defined by a service level agreement. The service level agreement includes a combined schedule for backing up both data stored in the database and log data associated with a database.
摘要翻译：使用一个调度执行数据库和关联日志的备份的系统和方法，使得数据库及其关联的日志的备份可以被恢复或恢复到期望的时间点。与备份类型相关联的备份请求由服务级别协议接收和定义。服务级别协议包括用于备份存储在数据库中的数据和记录与数据库相关联的数据的组合计划。

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