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声雷达在大气边界层探测中被广泛应用,但由于声波与大气相互作用的复杂性以及强噪声对微弱回波信号的干扰,使得研究声雷达探测方法并改进设计成为当前国际大气声遥感领域中的重要课题。 在我国研制的SWT测风测温声雷达探测系统中,采用PLTF方法提取强噪声背景中随机弱信号的Doppler频偏信号f_d,并采用V-F-BCD变换方法和模块化设计来提高频率分辨力与测风精度。
Sonic radars are widely used in the detection of atmospheric boundary layer. However, due to the complexity of the interaction between sound waves and the atmosphere and the interference of strong noises to weak echo signals, the research of sound radar detection methods and the improvement of design have become the focus of current international atmospheric sound remote sensing An important issue. In the SWT sounding and sounding radar system developed in our country, the Doppler frequency deviation signal f_d of random weak signal in the strong noise background is extracted by PLTF method, and the frequency resolution and frequency are improved by the method of VF-BCD and modular design Wind measurement accuracy.