摘要
为了有效解决现代战场复杂电磁环境下跳频信号的侦察问题,采用STFT时频分析法进行跳频信号处理。针对存在定频干扰的情况,根据跳频信号的时频图随时间变化的差异性,提出了一种基于时频图跳频图案进行功率谱非线性对消的跳频信号检测算法,可以有效地抑制定频干扰,提高跳频信号的检测概率。对于跳频信号的自动拼接处理,提出在校时时通过补零法则来精确定位拐点的位置,仿真结果表明,改进的校时算法能实现跳频信号零误差拼接。
In order to solve the problem reconnaissance of frequency-hopping signals in complicated electromagnetic environment of modern battlefield,STFT time-frequency analysis is an efficient approach.A new method for frequency-hopping signals detection based on power spectrum nonlinear elimination is proposed,which uses the change of the time-frequency figure along with the time variety.It can solve the detection issue efficiently and improve probability of detection when the frequency-fixed signals exist at the same time.For the automatic mosaic of frequency-hopping signals,a new method of zero-padding is proposed in order to solve the problem of time checkout.Simulation results indicate that the method can achieve zero-error of frequency-hopping signals mosaic through ensuring the inflexion precisely.
出处
《无线电工程》
2010年第8期13-15,共3页
Radio Engineering
关键词
跳频检测
时频分析
定频干扰
跳频拼接
frequency-hopping detection
time-frequency analysis
frequency-fixed signals interfere
frequency-hopping mosaic
