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    • 2. 发明授权
    • RFID tag assisted GPS receiver system
    • RFID标签辅助GPS接收机系统
    • US08743699B1
    • 2014-06-03
    • US12954490
    • 2010-11-24
    • Keir Finlow-BatesJoonas V. T. ViskariTerry FK Ngo
    • Keir Finlow-BatesJoonas V. T. ViskariTerry FK Ngo
    • H04L12/26
    • G01S19/05G01S1/68G01S19/10
    • A system and method are disclosed for improving the speed of operation and accuracy of GPS receivers. The system comprises a RFID assisted GPS (RAGPS) receiver and geographically dispersed RFID assistance tags. The RAGPS receiver and the RFID assistance tags store location data comprising current location estimate, almanac, and ephemeris data. The location data is time stamped. The RFID assisted GPS (RAGPS) receiver comprises a GPS receiver, a RFID tag reader, a RFID transmitter and a controller. The controller comprises software that transfers the location data to and from the RAGPS receiver and a RFID assistance tag. The method discloses the RAGPS receivers reading up-to-date location data from a nearby RFID assistance tags and similarly if the RAGPS receivers have up-to-date location data already, the RAGPS receivers may write that location data to a nearby assistance tags that lacks up-to-date location data.
    • 公开了一种用于提高GPS接收机的操作速度和精度的系统和方法。 该系统包括RFID辅助GPS(RAGPS)接收机和地理上分散的RFID辅助标签。 RAGPS接收机和RFID辅助标签存储包括当前位置估计,历书和星历数据的位置数据。 位置数据是时间戳的。 RFID辅助GPS(RAGPS)接收机包括GPS接收器,RFID标签读取器,RFID发射器和控制器。 控制器包括将位置数据传送到RAGPS接收器和从RAGPS接收器传送位置数据的软件以及RFID辅助标签。 该方法公开了RAGPS接收机从附近的RFID辅助标签读取最新的位置数据,类似地,如果RAGPS接收机已经具有最新的位置数据,则RAGPS接收机可将该位置数据写入附近的辅助标签, 缺少最新的位置数据。
    • 3. 发明授权
    • Method and apparatus for sensor based pedestrian motion detection in hand-held devices
    • 手持装置中用于基于传感器的行人运动检测的方法和装置
    • US08849605B2
    • 2014-09-30
    • US13215580
    • 2011-08-23
    • Abdelmonaem LakhzouriJoonas V. T. Viskari
    • Abdelmonaem LakhzouriJoonas V. T. Viskari
    • G06F15/00
    • G01C22/006G01C21/16G01C21/20
    • A method and apparatus are described for sensor based detection of pedestrian motion. Based on a 3-axis accelerometer, the apparatus may differentiate between walking, running, standing still, or any random movement that the user may perform. The method may comprise the steps of performing a time domain analysis and a frequency domain analysis. The time domain analysis may be based on a Teager-Kaiser Energy Operator. The frequency domain analysis may be based on a fast Fourier transform. A apparatus for detecting pedestrian motion may comprises an accelerometer, an operator, a Teager-Kaiser Energy Operator, a first peak detection, a second peak detection, a buffer, a fast Fourier transform, a memory and a look-up table. The apparatus may be a hand held device.
    • 描述了用于基于传感器的行人运动检测的方法和装置。 基于3轴加速度计,该装置可以区分步行,跑步,静止或用户可能执行的任何随机运动。 该方法可以包括执行时域分析和频域分析的步骤。 时域分析可以基于Teager-Kaiser能量算子。 频域分析可以基于快速傅里叶变换。 用于检测行人运动的装置可以包括加速度计,操作员,Teager-Kaiser能量运算符,第一峰值检测,第二峰值检测,缓冲器,快速傅里叶变换,存储器和查找表。 该装置可以是手持装置。