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    • 64. 发明申请
    • POSITION DETERMINATION FOR A WIRELESS TERMINAL IN A HYBRID POSITION DETERMINATION SYSTEM
    • 混合位置确定系统中无线终端的位置确定
    • WO2003092319A1
    • 2003-11-06
    • PCT/US2003/012195
    • 2003-04-22
    • QUALCOMM, INCORPORATED
    • SHEYNBLAT, Leonid
    • H04Q7/38
    • H04W64/00G01S1/026G01S5/14G01S19/25G01S19/40G01S19/46
    • Techniques to determine a position estimate for a wireless terminal. An accurate position estimate for the terminal is initially obtained (e.g., based on a first (accurate) position determination sub-system). For each of one or more transmitters (e.g., base stations) in a second (less accurate) position determination sub-system, an "expected" pseudo-range is computed based on the accurate position estimate for the terminal and the base station location, a "measured" pseudo-range is also obtained, and a pseudo-range residual is then determined based on the expected pseudo-range and the measured pseudo-range. Thereafter, to determine an updated position estimate for the terminal, measured pseudo-ranges are obtained for a sufficient number of transmitters. The measured pseudo-range for each base station may be corrected based on the associated residual. The updated position estimate is then determined based on the corrected pseudo-ranges for these transmitters.
    • 确定无线终端的位置估计的技术。 最初获得终端的精确位置估计(例如,基于第一(准确的)位置确定子系统)。 对于第二(不太精确)位置确定子系统中的一个或多个发射机(例如,基站)中的每一个,基于终端和基站位置的准确位置估计来计算“预期”伪距离, 也可以获得“测量”的伪距离,然后基于预期的伪距离和测量的伪距来确定伪距离残差。 此后,为了确定终端的更新的位置估计,对于足够数量的发射机获得测量的伪距离。 可以基于相关联的剩余来校正每个基站的测量的伪距离。 然后基于这些发射机的校正伪距来确定更新的位置估计。
    • 68. 发明申请
    • APPARATUS AND METHODS FOR SYNCHRONIZING A CONTROLLER AND SENSORS
    • 用于同步控制器和传感器的设备和方法
    • WO2017070593A2
    • 2017-04-27
    • PCT/US2016/058289
    • 2016-10-21
    • QUALCOMM INCORPORATED
    • PITIGOI-ARON, RaduSHEYNBLAT, LeonidPUIG, CarlosBLACK, JustinKULKARNI, Rashmi
    • G06F1/12
    • H04J3/0685G06F1/12G08C2201/20H04Q9/00
    • Disclosed are methods and apparatus for synchronizing a controller and sensors in a system. A timestamp is provided in a host controller of an interface event on an interface coupled with host controller through detecting a message from a sensor on the interface that identifies the issuance of the interface event caused by the sensor at a first time. In response, the controller issues first and second events on the interface at respective second and third times, while concurrently counting cycles of a clock in the controller after each issuance. The controller also receives a first and second sensor counts representing the internal sensor clock times noted for the first and second events. The controller may then accurately calculate the timestamp of the interface event corresponding to the first time based on both internal controller counts and the sensor counts without needing a timestamp from the sensor directly.
    • 公开了用于同步系统中的控制器和传感器的方法和设备。 在与主控制器耦合的接口上的接口事件的主控制器中通过检测来自接口上的传感器的消息来提供时间戳,所述消息识别第一时间由传感器引起的接口事件的发布。 作为响应,控制器分别在第二次和第三次在接口上发布第一和第二事件,同时在每次发布之后对控制器中的时钟周期进行计数。 该控制器还接收第一和第二传感器计数,该第一和第二传感器计数表示针对第一和第二事件记录的内部传感器时钟时间。 然后,控制器可以基于内部控制器计数和传感器计数精确地计算与第一次对应的接口事件的时​​间戳,而不需要直接来自传感器的时间戳。