摘要
提出一种利用波形复制 - FFT联合检测剔除差分跳频信号检测中部分干扰频率的方法。在跳同步信号的支持下 ,将一跳驻留时间内的信号分成长度相等的前后两部分并分别与其对称复制波形进行拼接 ,根据有用差分跳频信号、同样干扰信号和异样干扰信号在前后两部分的复制和拼接所形成信号中能量分布的不同来识别和剔除异样干扰信号。仿真结果表明
s: This paper presents a conjoint waveform copy FFT detection method for Differential Frequency Hopping (DFH) signals. With the help of hop synchronous signal, the received signals during a hop can be equally divided into two parts and each part can also be conjoined with its symmetrical copy to obtain a new representation of itself. Thus, useful DFH signals, similar interference signals and dissimilar interference signals can be recognized when comparing their energy in frequency domain among the new representations. The simulation results show that most of the dissimilar interference can be cancelled by using this detection method.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2002年第1期56-60,共5页
Journal of the China Railway Society
