A Novel Demodulation Method Based on Partial Period Curve-fitting for FM Signal in Impulse Acceleration Calibration by Using Laser Interference Methods
LIANG Zhi-guo
National Key Laboratory of Science and Technology on Metrology & Calibration, Changcheng Institute of Metrology and Measurement, Beijing 100095,China
Abstract：Aiming at the FM signal demodulation in impulse acceleration by using laser interference methods, a novel demodulation method are introduced. It is based on the partial sinusoidal period series curve-fitting, by using about 1/5 period sine wave models moving and curve-fitting, the 4 sine wave parameters are gotten, and the FM demodulation be realized. To the impulse laser interference Doppler signals, it has an excellent adaptability, there is no need curve cutting operation, filtering, and so on, the demodulation resolution is one sampling period, and it has well stability. In experiment, the validity and feasibility are proved, and it must be a novel processing method of impulse acceleration signals by using laser interference methods. The method above can also be used in demodulation of vibration wave form of laser interference Doppler signals.
梁志国. 一种基于残周期拟合的激光测冲击信号解调方法[J]. 计量学报, 2021, 42(4): 503-510.
LIANG Zhi-guo. A Novel Demodulation Method Based on Partial Period Curve-fitting for FM Signal in Impulse Acceleration Calibration by Using Laser Interference Methods. Acta Metrologica Sinica, 2021, 42(4): 503-510.
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2021, Vol. 42 
