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| Research of Software Designed Receiver on Two Way Satellite Time and Frequency Transfer |
| YANG Zhi-qiang,LIANG Kun,ZHANG Ai-min,YUAN Xiao-di,SONG Wen-xia |
| National Institute of Metrology, Beijing 100029, China |
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Abstract A research on two-way satellite time and frequency transfer (TWSTFT) based on software-defined radio (SDR) receivers is proposed, it could reduce the diurnals and also the measurement noise considerably. SDR TWSTFT shows superior performance to that of SATRE TWSTFT for all links. NIM has participated the pilot study in Aisa-Europre link via satellite AM22, the SU-NIM SATRE TWSTFT is a long-distance baseline between SU in Russia and NIM in Beijing (China). As shown in the results, the gain of SDR TWSTFT over SATRE TWSTFT is obviously significant for the SU-NIM baseline, the mean gain factor in TDev is 2.0. The SU-NIM link is the only one long-distance baseline which get a obviously significant gain. Then, the time stability of ABS-2A link is analyzed, it is shown that SDR TWSTFT has a better gain on short-term link noise suppression.
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Received: 01 June 2020
Published: 06 December 2021
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2021, Vol. 42 
