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为提高二次雷达(Secondary Surveillance Radar,SSR)信号分析处理能力,针对傅里叶变换在时频域分析的局限性,利用小波信号奇异性检测特点,通过对S模式询问、应答信号进行小波分解,计算第一层高频系数,得到信号脉冲持续时间,实现了信号报头检测,并比较高频系数模极大值,提取出信号调制信息,实现了基于小波变换的二进制差分相移键控(DPSK)和二进制振幅键控(ASK)解调,验证了小波变换技术分析处理二次雷达信号的可行性。
In order to improve the ability of Secondary Surveillance Radar (SSR) signal analysis and processing, aiming at the limitation of Fourier transform in time-frequency domain analysis, using the singularity detection characteristics of wavelet signal, , Calculated the first layer of high-frequency coefficients, the duration of the signal pulse, the realization of the signal header detection and comparison of high-frequency coefficient modulus maximum, extracted signal modulation information, based on the wavelet transform binary differential phase shift keying DPSK) and binary amplitude keying (ASK) demodulation. The feasibility of wavelet transform analysis and processing of secondary radar signals is verified.