Jie Ma, Min Li, Lü Haifei, Hongyun Gao, Xiaoyan Wen, Kai Su. Undersampling Digital Orthogonal Demodulation Method for Heterodyne Interference System[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2306002
- Laser & Optoelectronics Progress
- Vol. 58, Issue 23, 2306002 (2021)
Fig. 1. Optical path of experimental system
Fig. 2. Undersampling frequency spectrum of bandpass signal
Fig. 3. Flow chart of demodulation
Fig. 4. Frequency spectrum of heterodyne interference signal
Fig. 5. Demodulation results at different sampling frequencies. (a) 200 MHz; (b) 20 kHz; (c) 10 kHz; (d) 5 kHz
Fig. 6. Effect of sampling frequency on linear demodulation interval
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Table 1. Demodulation results at different sampling frequencies
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