【摘要】：針對星間鐘差測量及時間頻率的精確傳遞的需求,通常情況都會在地面對衛(wèi)星的收發(fā)通道時延進行準確標定,但在空間環(huán)境下設(shè)備老化和環(huán)境溫度變化會導(dǎo)致收發(fā)通道時延逐漸偏離標定值。利用偽碼相關(guān)測距的原理,結(jié)合時分早遲偽碼相位交替調(diào)制技術(shù)和包絡(luò)檢波技術(shù),提出了一種在軌通道時延自校準方法。通過3條閉合測量環(huán)路的建立,在不影響接收機正常收發(fā)通信的情況下,實時校準其收發(fā)通道時延。結(jié)果表明,該方法時延測量精度達到亞納秒量級。
[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.
【作者單位】： 北京衛(wèi)星信息工程研究所;
【分類號】：V443

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