摘要: |
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。 |
关键词: 敌我识别 二次雷达 S模式 小波变换 信号处理 |
DOI: |
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基金项目: |
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Application of Wavelet Transform in Mode S SSR Signal Analysis and Processing |
LI Bing,GAO Yong |
(College of Electronic and Information Engineering,Sichuan University,Chengdu 610065,China;Unit 61398 of PLA, Shanghai 200137, China) |
Abstract: |
To enhance the signal analysis and processing ability of secondary surve
illance radar (SSR), in allusion to the limitation of Fourier transform in t
ime-frequency domain analysis, based on the characteristics of wavelet signal si
ngularity detection, through wavelet decomposition of S mode inquiry and respons
e signal and then obtaining pulse duration with the 1st wavelet high frequ
ency coefficient, the signal preamble detection is realized. By comparin
g wavelet high frequency coefficient module maximum value and abstracting signa
l modulation information,demodulation with wavelet
transformation in binary differential phase shift keying ( DPSK) and binary amp
litude shift keying (ASK) is also realized, thus validating the feasibility of a
nalysing and proce
ssing the SSR signal by wavelet transform. |
Key words: identification friend or foe(IFF) secondary surveillance radar(SSR) mode S wav
elet transform signal processing |