摘要
差分跳频利用频率的跳变携带信息 ,只要正确检测出每跳的频率 ,就可以恢复出信息 .本文提出一种基于STFT的跳检测方法 ,并与G函数相结合来分析短波DFH信号在每跳时间间隔内的频率特性 ,以检测可能的跳频率 .仿真结果表明 ,在短波信道几种可能的情况下 ,检测效果良好 .
The information is carried through the hopping of frequency in DFH (Differential frequency hopping). If the frequency is detected out, the information can be recovered. One method of hop-detecting based on STFT is put forward, and the frequency features of HF DFH signal in one-hop time is analyzed. Combining with the G function, it can detect the possible frequency. The simulation shows the detecting result is good in several kinds of HF channel.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第1期13-16,共4页
Acta Electronica Sinica
