摘要
线性调频信号(Chirp)在对应的分数阶傅里叶变换(Fractional Fourier Transform,Frft)域上具有良好的聚焦性能,据此提出了一种基于Frft的二进制正交键控(BOK)调制的Chirp信号扩频通信方法。发射端采用BOK-Chirp信号,在接收端采用Frft对Chirp信号进行检测。仿真分析表明,该方法可获得较好的误码率。
Chirp signals have the best energy concentration in a special fractional Fourier domain. A BOK-Chirp spread spectrum communication scheme based on fractional Fourier transform（ Frft） is proposed. The Chirp signals are modulated by binary orthogonal keying signals at the transmitting end,and they are detected through Frft at the receiving end. Simulation shows that the scheme has good performance in bit error rate.
出处
《无线电工程》
2014年第9期32-34,73,共4页
Radio Engineering
关键词
线性调频信号
分数阶傅里叶变换
扩频通信
linear frequency modulation
fractional Fourier transform
spread spectrum communication
