摘要
首先讨论了线性调频信号在时频域的主要特点及调频斜率与振幅频谱的关系,在此基础上提出基于频率区间二分解调的LFM信号参数估计方法。该方法充分利用了LFM信号的线性性质,有效地将信号与噪声分离开来,通过二分法搜索调频斜率,提高了LFM信号参数的估计效率。
This paper firstly discusses the principal characteristics of linear frequency modulation（LFM） signal in time-frequency domain and the relationship between frequency modulation（FM） slope and swing spectrum,based on it,this paper proposes the LFM signal parameter estimation method based on the frequency interval halving demodulation.This method applies enough the linearity of the LFM signal,effectively separates signals and noises,searches the FM slope through the method of frequency interval halving,which advances the estimation efficiency of LFM signal parameters.
出处
《舰船电子对抗》
2009年第6期94-96,共3页
Shipboard Electronic Countermeasure
关键词
线性调频
频率解调
参数估计
linear frequency modulation
frequency demodulation
parameter estimation
