摘要
采用曲线拟合的方法来拟合信号的相位,目的是通过信号的相位曲线求出信号的瞬时频率,并根据文章中采用的算法对线形调频信号、正弦调频信号、混合调频信号、幂律调频信号4种调频信号的瞬时频率进行测量,取得了理想效果,仿真试验证明该方法有效。
This paper uses the curve fitting to approach the signal phase, calculating instantaneous frequency of signal by its phase curve. According to the presented method, instantaneou frequencies of four kinds of modulated signals including linear frequency modulated signal, sinusoid frequency modulated signal, mixed frequency modulated signal and power frequency modulated signal, are measured respectively. And its effect is very ideal. The simulation experiment has proved the effectiveness of this method.
出处
《导弹与航天运载技术》
北大核心
2005年第4期38-42,共5页
Missiles and Space Vehicles
关键词
信号处理
时频分析
调频信号
瞬时频率
频率估计
Signal processing
Time-frequency analysis
Frequency modulated signal
Instantaneous frequency
Frequency estimation
