TY - GEN
T1 - Influence of Frequency Source Stability on 2D Resolution of Spaceborne Synthetic Aperture Radar
AU - Li, Xinyi
AU - Li, Chunsheng
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Time counting of the spaceborne SAR payload system is realized by frequency division or frequency multiplication of the crystal oscillator source. For the monostatic SAR system, the same frequency source is used for both transceivers, and theoretically, there is no influence of frequency synchronization. However, for the actual crystal oscillator source, there is a certain frequency drift phenomenon in the sending and receiving time interval, so there will be errors during signal demodulation. In this paper, the sliding beamforming mode of monostatic spaceborne SAR radar is analyzed. First, the mathematical modeling of the echo signal of the monostatic SAR radar in this mode is carried out. Secondly, the phase error caused by the frequency drift of the frequency source is theoretically deduced. Finally, a simulation experiment is carried out to change the parameter values under different viewing angles and compare the resolution under different conditions and the output results of other parameters, so as to analyze the influence of the frequency source stability on the two-dimensional resolution of the spaceborne SAR radar.
AB - Time counting of the spaceborne SAR payload system is realized by frequency division or frequency multiplication of the crystal oscillator source. For the monostatic SAR system, the same frequency source is used for both transceivers, and theoretically, there is no influence of frequency synchronization. However, for the actual crystal oscillator source, there is a certain frequency drift phenomenon in the sending and receiving time interval, so there will be errors during signal demodulation. In this paper, the sliding beamforming mode of monostatic spaceborne SAR radar is analyzed. First, the mathematical modeling of the echo signal of the monostatic SAR radar in this mode is carried out. Secondly, the phase error caused by the frequency drift of the frequency source is theoretically deduced. Finally, a simulation experiment is carried out to change the parameter values under different viewing angles and compare the resolution under different conditions and the output results of other parameters, so as to analyze the influence of the frequency source stability on the two-dimensional resolution of the spaceborne SAR radar.
KW - SAR
KW - frequency source
KW - monostatic system
KW - resolution
UR - https://www.scopus.com/pages/publications/85145548655
U2 - 10.1109/CISS57580.2022.9971282
DO - 10.1109/CISS57580.2022.9971282
M3 - 会议稿件
AN - SCOPUS:85145548655
T3 - 3rd China International SAR Symposium, CISS 2022
BT - 3rd China International SAR Symposium, CISS 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 3rd China International SAR Symposium, CISS 2022
Y2 - 2 November 2022 through 4 November 2022
ER -