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45 条记录 (耗时 0.015 秒)

    APPARATUS AND METHOD FOR DETERMINING SLEEP CLOCK TIMING
    21.
    发明授权
    APPARATUS AND METHOD FOR DETERMINING SLEEP CLOCK TIMING 有权
    装置和方法用于确定睡眠冲程正

    公开(公告)号：EP1869780B1

    公开(公告)日：2010-04-21

    申请号：EP06737617.8

    申请日：2006-03-08

    申请人： QUALCOMM INCORPORATED

    发明人： WANG, Michael Mao ,  LING, Fuyun ,  VIJAYAN, Rajiv

    IPC分类号： H04B1/16

    CPC分类号： H04W52/029 ,  Y02D70/00

    摘要： Apparatus and methods for estimating the frequency of a sleep or slow clock by selectively utilizing an estimated sleep clock frequency and an estimated change in the sleep clock frequency. The disclosed apparatus includes a sleep clock frequency estimator to output a fast clock derived sleep clock frequency estimate and a sleep clock change frequency estimator to output an estimate of a change in frequency of the sleep clock. The apparatus further includes a combiner that weights at least one of the fast clock derived sleep clock frequency estimate to obtain a weighted sleep clock frequency estimate and the estimate of the change in frequency of the sleep clock to obtain a weighted estimate of the change in frequency of the sleep clock. The combiner also determines a new estimate of the sleep clock frequency using at least one of the weighted sleep clock frequency estimate and the weighted estimate of the change in frequency of the sleep clock. Complementary methods are also disclosed.

    METHODS AND APPARATUS FOR CONFIGURING A PILOT SYMBOL IN A WIRELESS COMMUNICATION SYSTEM
    22.
    发明公开
    METHODS AND APPARATUS FOR CONFIGURING A PILOT SYMBOL IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
    方法和设备配置导频符号无线通信系统

    公开(公告)号：EP2074786A1

    公开(公告)日：2009-07-01

    申请号：EP07843409.9

    申请日：2007-09-27

    申请人： QUALCOMM Incorporated

    发明人： WANG, Michael Mao

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2613 ,  H03M13/271 ,  H03M13/2771 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/0069 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0083 ,  H04L25/0226 ,  H04L27/2626

    摘要： Methods and apparatus for constructing a pilot symbol for a communication frame transmitted in a wireless communication system, such as an OFDM system, are disclosed. In particular, the methods and apparatus generate at least one pseudo-random noise sequence having at least a predetermined length, where the at least one pseudo-random noise sequence represents a system configuration of a wireless system. A time domain symbol sequence is modulated with the at least one pseudo-random noise sequence to create a timing acquisition pilot symbol. The modulated acquisition pilot symbol is further masked to a prescribed frequency profile and placed in a frame for wireless transmission. Accordingly, different system configurations can be communicated from a transmitter to a receiver with the acquisition pilot symbol modulated with correspondingly different pseudo-random noise sequences, while affording low complexity required to process the acquisition pilot symbol and a minimum peak to average power ratio when using QPSK modulation.

    APPARATUS AND METHODS FOR ESTIMATING A SLEEP CLOCK FREQUENCY
    24.
    发明公开
    APPARATUS AND METHODS FOR ESTIMATING A SLEEP CLOCK FREQUENCY 审中-公开
    VORRICHTUNGEN UND VERFAHREN ZURSCHÄTZUNGEINER SLEEP-TAKTFREQUENZ

    公开(公告)号：EP1946450A1

    公开(公告)日：2008-07-23

    申请号：EP06839807.2

    申请日：2006-11-09

    申请人： QUALCOMM Incorporated

    发明人： WANG, Michael Mao ,  GANAPATHY, Chinnappa K. ,  BAI, Jinxia

    IPC分类号： H04B1/16

    CPC分类号： H04W52/029 ,  Y02D70/166

    摘要： Apparatus and methods for estimating the frequency of a sleep or slow clock using a fast clock, such as a temperature compensated crystal oscillator. The disclosed apparatus include an estimator having a first counter that receives sleep clock synchronized pulses issuing each cycle of the sleep clock period, yet are synchronized to a fast clock. The slow clock synchronized pulses are counted up to a predetermined number; whereupon a full count signal is issued. A second counter receives the full count signal and increments each time the full count signal is received. A third counter counts fast clock cycles until the full count signal occurs. Based on the number of counts of the slow and fast clock cycles, the frequency of the slow clock may be determined using only the domain of the fast clock for performing the measurement thereby tying accuracy of the measurement to the accuracy of the fast clock. The disclosed apparatus also include an integrated circuit and a transceiver employing the disclosed estimator. Corresponding methods are also disclosed.

    摘要翻译： 使用诸如温度补偿晶体振荡器的快速时钟来估计睡​​眠或慢时钟的频率的装置和方法。 所公开的装置包括具有第一计数器的估计器，该第一计数器接收发出睡眠时钟周期的每个周期的睡眠时钟同步脉冲，但是与快速时钟同步。 慢时钟同步脉冲被计数到预定数量; 于是发出完整计数信号。 第二个计数器接收完整的计数信号，并在每次接收到全部计数信号时递增。 第三个计数器计数快速时钟周期，直到发生完全计数信号。 基于慢速和快速时钟周期的计数次数，可以仅使用用于执行测量的快速时钟的域来确定慢时钟的频率，从而将测量的精度与快速时钟的精度相结合。 所公开的装置还包括采用所公开的估计器的集成电路和收发器。 还公开了相应的方法。

    SELECTIVE NETWORK SWITCHING IN A WIRELESS BROADCAST NETWORK
    26.
    发明公开
    SELECTIVE NETWORK SWITCHING IN A WIRELESS BROADCAST NETWORK 有权
    选择性网络交换与无线广播网络

    公开(公告)号：EP1872613A1

    公开(公告)日：2008-01-02

    申请号：EP06740629.8

    申请日：2006-04-07

    申请人： QUALCOMM INCORPORATED

    发明人： WANG, Michael Mao ,  MANTRAVADI, Ashok ,  CHARI, Murali Ramaswamy

    IPC分类号： H04Q7/38

    CPC分类号： H04B1/3805 ,  H04H20/26 ,  H04H40/18

    摘要： The disclosure is directed to a mobile communication device that may receive wireless broadcast signals from a number of different base stations or transmitters. As the location of the device moves relative to the transmitters, one transmitter will likely be identified as the transmitter broadcast the strongest, or highest quality, signal. When that determination is made, the user of the mobile device is presented the opportunity to switch to receiving that transmitters signal. Based on the user's reply, the device may remain with the current transmitter, even though it does not have the strongest signal, or the device may be configured to acquire and start receiving the new transmitter's signal. The measuring of the quality of a transmitter's signal may be based on a composite score that combines a number of individual measurements made over a predetermined period of time.

    METHODS AND APPARATUS FOR INCLUDING COMMUNICATION MODE INFORMATION (TDD OR FDD) IN A TRANSMISSION FRAME FOR SYSTEM ACQUISITION
    30.
    发明公开
    METHODS AND APPARATUS FOR INCLUDING COMMUNICATION MODE INFORMATION (TDD OR FDD) IN A TRANSMISSION FRAME FOR SYSTEM ACQUISITION 有权
    METHOD AND APPARATUS FOR在传输帧ACQUIRING通信模式信息（TDD或FDD）进行系统捕获

    公开(公告)号：EP2204062A1

    公开(公告)日：2010-07-07

    申请号：EP08799422.4

    申请日：2008-09-10

    申请人： QUALCOMM Incorporated

    发明人： WANG, Michael Mao

    IPC分类号： H04W48/08 ,  H04W56/00

    CPC分类号： H04B7/2615 ,  H04W48/12

    摘要： Methods and apparatus for including mode information in a wireless transmission frame, which is useful for system acquisition. In particular, a first information bit is provided in a preamble of a transmission frame, where the bit is configured to indicate that a wireless communication system is operating according to either a time division duplex (TDD) mode or a frequency division duplex (FDD) mode. The addition of a single bit minimally affects the resources of the preamble. Additionally, another bit resource already present in the preamble for normally communicating whether FDD transmissions are full duplex or half-duplex transmissions, may be further allocated to indicate partitioning information concerning TDD mode transmissions when the first bit indicates TDD mode, thus affording additional information communicated in the frame without increasing preamble resources.