NAVIGATION SIGNAL TRANSMITTER AND NAVIGATION SIGNAL GENERATING METHOD
    1.
    发明公开
    NAVIGATION SIGNAL TRANSMITTER AND NAVIGATION SIGNAL GENERATING METHOD 有权
    NAVIGATIONSSIGNALSENDER UND NAIGIGATIONSSIGNALERZEUGUNGSVERFAHREN

    公开(公告)号:EP2703838A1

    公开(公告)日:2014-03-05

    申请号:EP11864461.6

    申请日:2011-04-26

    IPC分类号: G01S19/10 G01C21/28

    摘要: Provided is a navigation signal transmitter capable of ensuring reduction in frequency deviation of a terrestrially transmitted navigation signal at low cost. The navigation signal transmitter is operable to receive a transmission wave, generate a synchronization pulse in synchronization with a predetermined data frame, generate an internal clock fundamental oscillation by a reference signal synchronizing section (550) using the synchronization pulse as a reference signal, generate an IMES signal based on the internal clock fundamental oscillation, and transmit the IMES signal. The reference signal synchronizing section (550) comprises a counter circuit (551), a comparator (553), a low-pass control filter (554), a D/A converter (555) and a voltage controlled oscillator (556). The reference signal synchronizing section (550) is configured to, when a magnitude relationship between the number of clock pulses generated in the voltage controlled oscillator (556) using the synchronization pulse as the reference signal and a reference value falls within a predetermined value and continues a predetermined number of times in one direction, adjust a level of control voltage of the voltage controlled oscillator (556).

    摘要翻译: 提供能够以低成本确保地面传输的导航信号的频率偏差的导航信号发送器。 导航信号发送器可操作以接收传输波,与预定数据帧同步产生同步脉冲,使用同步脉冲作为参考信号,通过参考信号同步部分(550)产生内部时钟基本振荡,生成 IMES信号基于内部时钟基波振荡,并传输IMES信号。 参考信号同步部分(550)包括计数器电路(551),比较器(553),低通控制滤波器(554),D / A转换器(555)和压控振荡器(556)。 参考信号同步部分(550)被配置为当使用作为参考信号的同步脉冲在压控振荡器(556)中产生的时钟脉冲数与参考值之间的幅度关系落在预定值内并继续时 在一个方向上预定次数,调节压控振荡器(556)的控制电压的电平。