Volume 41 Issue 6
Nov.  2021
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Article Navigation >  Chinese Journal of Space Science  > 2021  >  41(6): 945-953
WANG Yehuan, DONG Xiaolong, ZHU Di, LIU Mengwei, GONG Junjie. Design and Implementation of a Chirp Transform Spectrometer for Deep Space Exploration[J]. Chinese Journal of Space Science, 2021, 41(6): 945-953. doi: 10.11728/cjss2021.06.945
Citation: WANG Yehuan, DONG Xiaolong, ZHU Di, LIU Mengwei, GONG Junjie. Design and Implementation of a Chirp Transform Spectrometer for Deep Space Exploration[J]. Chinese Journal of Space Science, 2021, 41(6): 945-953. doi: 10.11728/cjss2021.06.945
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Design and Implementation of a Chirp Transform Spectrometer for Deep Space Exploration

doi: 10.11728/cjss2021.06.945 cstr: 32142.14.cjss2021.06.945

  • 1. National Space Science Center, Chinese Academy of Sciences, Beijing 100190;

  • 2. University of Chinese Academy of Sciences, Beijing 100049;

  • 3. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080

  • Received Date: 2020-05-07
  • Rev Recd Date: 2021-01-27
  • Publish Date: 2021-11-15
    Abstract
  • According to the demand of radiation resistance, high resolution and low power consumption for spectrometer in deep space exploration, the design and implementation of a high resolution spectrometer based on Chirp transform are studied. The key problem in the implementation of the high-resolution spectrometer based on a SAW filter with 1 GHz center frequency, 400 MHz bandwidth and 10 µs dispersion time are studied. The system is designed and built by the combination of analog method and digital method, and the basic functions of the spectrometer are realized. The bandwidth of the system is 400 MHz, the frequency resolution is 152 kHz and the power consumption is about 3.6 W. The influence of the nonideal behavior of the compressor device on frequency resolution is analyzed. Amplitude compensation curve and phase compensation curve are carried out based on frequency response characteristics of compressor device. The amplitude mismatch and phase mismatch of the signal generated by the expander are compensated. The simulation results show that the frequency resolution of the system after compensation increases to 108 kHz.

     

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