摘要
考虑到哈特莱变换对于实信号频谱分析的高效性,在分析哈特莱变换与傅里叶变换相互关系的基础上,给出了离散哈特莱变换(FHT)基2算法的推导,并将其计算量与FFT算法进行了比较,最后应用高效的离散哈特莱变换(FHT)基2算法对快速跳频信号进行了STFT时频分析。仿真结果表明该方法能够有效地分析随时间快速跳变的跳频信号。通过比较可以看出该算法运算量较小,可有效节约运算时间,适合于快速跳频信号的实时分析和跟踪干扰。
Considering Hartley transform＇s effectiveness in analyzing frequency spectrum of real signal, this paper analyzes the relations of DHT and DFT, inferres radix-2 FHT algorithm from the definition of DHT, and compares its amount of calculation with FFT algorithm. At last, fast frequency hopping signals is analyzed using STFT time-frequency method based on radix-2 FHT algorithm. The simulation results show that it is effective to analyze fast frequency hopping signal in both time and frequency domains by using this method. The comparition shows this algorithm can reduce computation, save operation time and is suitable for real-time analyzing and tracking jamming of frequency hopping signals.
出处
《探测与控制学报》
CSCD
北大核心
2007年第2期30-34,共5页
Journal of Detection & Control
基金
国防科技重点实验室基金资助(51473030105JB3201)
关键词
跳频
哈特莱变换
傅里叶变换
时频分析
frequency hopping signals
Hartley transform
Fourier transform
time-frequency analysis
