基于希尔波特-黄变换的冲击无线电信号检测

Impulse Radio Signal Detection based on Hilbert-Huang Transform

冲击无线电信号具有低截获、瞬态特性。本文提出采用希尔波特-黄变换(HHT)方法从干扰和噪声中提取微弱的冲击无线电信号。通过HHT可以得到冲击无线电信号的时频谱,并与传统的小波时频谱和Wigner-Ville分布进行了比较。仿真表明：在信噪比低达-10dB的情况下进行冲击无线电信号检测,HHT方法优于传统的小波分析和Wigner-Ville分布。

Impulse radio （IR） signal has the property of transient and low probability of intercept （LPI） o The Hilbert-Huang Transform（HHT） methods is used to extract the weak impulse radio signal from interferential and noisy environment in this paper. The instantaneous frequency spectrum of the impulse radio signal is represented by HHT, and which is calibrate its fidelity compared with the best existing methods, the wavelet analysis and Wigner-Ville distribution （WVD）. Simulations have demonstrated that HHT methods is better than wavelet analysis and WVD using in IR signal detection while the SNR is -10dB.