星载接收机通道时延实时校准方法
发布时间：2018-12-31 18:05
【摘要】：针对星间钟差测量及时间频率的精确传递的需求,通常情况都会在地面对卫星的收发通道时延进行准确标定,但在空间环境下设备老化和环境温度变化会导致收发通道时延逐渐偏离标定值。利用伪码相关测距的原理,结合时分早迟伪码相位交替调制技术和包络检波技术,提出了一种在轨通道时延自校准方法。通过3条闭合测量环路的建立,在不影响接收机正常收发通信的情况下,实时校准其收发通道时延。结果表明,该方法时延测量精度达到亚纳秒量级。
[Abstract]:In order to meet the demand of the measurement of inter-satellite clock difference and the accurate transmission of time and frequency, the time delay of the satellite is usually calibrated in the ground. However, the aging of the equipment and the change of the ambient temperature in the space environment will lead to the delay of the transceiver channel deviating from the calibration value gradually. Based on the principle of pseudo-code correlation ranging, combined with the phase alternating modulation technique of time-division early and late pseudo-code and envelope detection, a self-calibration method of time-delay in orbit channel is proposed. Through the establishment of three closed measurement loops, the time delay of the transceiver channel is calibrated in real time without affecting the normal transceiver communication of the receiver. The results show that the precision of time delay measurement is in the order of sub-nanosecond.
【作者单位】： 北京卫星信息工程研究所;
【分类号】：V443
本文编号：2396929
[Abstract]:In order to meet the demand of the measurement of inter-satellite clock difference and the accurate transmission of time and frequency, the time delay of the satellite is usually calibrated in the ground. However, the aging of the equipment and the change of the ambient temperature in the space environment will lead to the delay of the transceiver channel deviating from the calibration value gradually. Based on the principle of pseudo-code correlation ranging, combined with the phase alternating modulation technique of time-division early and late pseudo-code and envelope detection, a self-calibration method of time-delay in orbit channel is proposed. Through the establishment of three closed measurement loops, the time delay of the transceiver channel is calibrated in real time without affecting the normal transceiver communication of the receiver. The results show that the precision of time delay measurement is in the order of sub-nanosecond.
【作者单位】： 北京卫星信息工程研究所;
【分类号】：V443
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