CAJ | 학술논문

为从频域上研究双曲调频(HFM)信号特性，运用驻相法推导其频谱表达式，绘出近似频谱图；再利用匹配滤波器的频域输出与雷达发射信号频谱之间的固有关系，通过傅里叶逆变换，得到HFM回波经过匹配滤波后的时域输出。最后，分别对HFM信号作FFT运算和对目标回波进行匹配滤波运算仿真，得到相应的频谱和脉压结果，与驻相法推导的结果相符。研究结果说明，驻相法分析HFM信号的脉压性质是一种更为简单有效的方法。
위종빈역상연구쌍곡조빈(HFM)신호특성，운용주상법추도기빈보표체식，회출근사빈보도；재이용필배려파기적빈역수출여뢰체발사신호빈보지간적고유관계，통과부리협역변환，득도HFM회파경과필배려파후적시역수출。최후，분별대HFM신호작FFT운산화대목표회파진행필배려파운산방진，득도상응적빈보화맥압결과，여주상법추도적결과상부。연구결과설명，주상법분석HFM신호적맥압성질시일충경위간단유효적방법。
To study the characteristics of hyperbolic frequency modulated (HFM) signals in frequency domain, this paper deduces the spectrum expression of the signals by applying to the stationary phase method, plots an approximate spectrogram, and obtains the HFM echoes’output after matched filtering in time domain, by using the inherent relationship between the match filter’s output in frequency domain and the spectrum of radar signal transmitted and Fourier inverse transform. And finally, the simulations of conducting the FFT operation on HFM signals and matched filtering operation on the target’s echoes are performed respectively, thus acquiring the results of corresponding spectrum and pulse compression, and conforming to those derived from the stationary phase method. Research results illustrate that the stationary phase method is simpler and more effective in analysis of the properties of HFM signal pulse compression.