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雷达信号模拟和信号处理技术对雷达系统研制具有重要的意义。文中分析了描述回波幅度和功率谱分布的统计模型,并深入研究了幅度服从一定分布同时具有特定功率谱的声雷达回波信号的建模与仿真方法,实现了声雷达探测大气回波信号的模拟。基于小波变换理论对回波信号进行了去噪方法研究。利用MATLAB仿真对各种影响小波去噪性能的参数进行了比较,确定将db20小波用于声雷达回波信号去噪处理。并通过对比试验得到适用于回波信号的最佳分解层数和阈值,实现了声雷达回波信号中杂波和噪声的去除,仿真结果验证了文中方法的有效性。
Radar signal simulation and signal processing techniques are of great significance to the development of radar systems. In this paper, a statistical model describing echo amplitude and power spectrum distribution is analyzed. The modeling and simulation of sonic radar echo signals whose amplitude follows a certain distribution and has a specific power spectrum are studied in detail. Simulation. Study on Denoising Method of Echo Signal Based on Wavelet Transform Theory. Using MATLAB simulation, the parameters that affect the denoising performance of wavelet are compared, and the db20 wavelet is used to denoise the acoustic radar echo signal. The optimum decomposition level and threshold for the echo signal are obtained through the comparative experiment, and the clutter and noise in the echo signal of the sounder are achieved. The simulation results verify the effectiveness of the proposed method.