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Volume 34 Issue 05
May  2008
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Journal of Beijing University of Aeronautics and Astronautics  > 2008  >  34(05): 503-506.
Niu Jianwei, He Rui, Hu Jianpinget al. Wireless video streaming oriented packet scheduling algorithm[J]. Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(11): 1066-1070. (in Chinese)
Citation: Lan Tian, Zhang Chunxi, Li Lijing, et al. Multirate digital phase generated carrier demodulation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(05): 503-506. (in Chinese)
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Multirate digital phase generated carrier demodulation

  • School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 20 Apr 2007
  • Publish Date: 31 May 2008
    Abstract
  • Based on the signal bandwidth in each phase generated carrier (PGC) demodulation procedure, a multirate demodulation scheme was proposed to solve the real time digital PGC demodulation problem at high sampling rate. The interfered output was analog-to-digital converted at high sampling rate to improve demodulation bandwidth and dynamic range. The procedures after frequency mixing and low pass filtering were down sampled and digital PGC demodulation computation was reduced. A digital PGC demodulation system was designed and implemented. The frequency mixing and low pass filtering procedures were implemented using field programmable gate arrays (FPGA) and the following procedures were implemented using digital signal processor (DSP). Real-time demodulation experiment verified that a test signal with 5kHz and 1rad was successfully demodulated at 1MHz sampling rate.

     

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