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    • 5. 发明授权
    • Precise position determination using VHF omni-directional radio range signals
    • 使用VHF全向无线电范围信号进行精确位置确定
    • US08179318B1
    • 2012-05-15
    • US12556714
    • 2009-09-10
    • Scott FurmanGuttorm Opshaug
    • Scott FurmanGuttorm Opshaug
    • G01S1/44
    • G01S1/50G01S1/045
    • Apparatus having corresponding methods and computer programs comprise a wireless receiver to receive a Very High Frequency (VHF) Omni-directional Radio Range (VOR) signal comprising a frequency-modulated (FM) component; an analog-to-digital converter to generate a digital signal based on the VOR signal, the digital signal comprising data representing the FM component; and a FM phase circuit comprising a correlator to generate a correlation peak based on the data representing the FM component and an ideal representation of the FM component, and a peak detector to determine a phase of the FM component based on the correlation peak.
    • 具有相应方法和计算机程序的装置包括无线接收器,用于接收包括调频(FM)分量的超高频(VHF)全向无线范围(VOR)信号; 模数转换器,用于基于所述VOR信号产生数字信号,所述数字信号包括表示所述FM分量的数据; 以及FM相电路,包括相关器,用于基于表示FM分量的数据和FM分量的理想表示来生成相关峰;以及峰值检测器,用于基于相关峰确定FM分量的相位。
    • 9. 发明授权
    • Doppler-aided positioning, navigation, and timing using broadcast television signals
    • 使用广播电视信号的多普勒辅助定位,导航和定时
    • US08125389B1
    • 2012-02-28
    • US12582051
    • 2009-10-20
    • Guttorm OpshaugJu-Yong DoDimitri Rubin
    • Guttorm OpshaugJu-Yong DoDimitri Rubin
    • G01S3/02
    • G01S19/52G01S19/10
    • Methods having corresponding apparatus and tangible computer-readable media comprise: determining a plurality of first pseudoranges based on a plurality of respective wireless television signals received by an apparatus and a clock signal generated by the apparatus, wherein each of the first pseudoranges represent a difference between a time of transmission of the respective wireless television signal from a respective transmitter and a time of reception of the respective wireless television signal at the apparatus and a time offset of the clock signal; determining a plurality of first estimates of frequency offsets of the wireless television signals received by the apparatus; and determining a first estimate of a location of the apparatus based on the first pseudoranges, the first frequency offsets of the wireless television signals, and locations of the transmitters.
    • 具有对应装置和有形计算机可读介质的方法包括:基于由装置接收的多个相应的无线电视信号和由该装置产生的时钟信号确定多个第一伪距,其中第一伪距中的每一个表示 各个无线电视信号从相应的发射机发送的时间和在该设备处的相应无线电视信号的接收时间和时钟信号的时间偏移; 确定由所述装置接收的无线电视信号的频率偏移的多个第一估计; 以及基于所述第一伪距,所述无线电视信号的所述第一频率偏移和所述发射机的位置来确定所述装置的位置的第一估计。