摘要
在卫星接收机中,数字锁相环的设计对通信系统的性能起着重要的作用。目前,低轨卫星接收机通常工作在高动态和低信噪比条件下,锁相环的收敛性能变差。该文给出了一种工作在高动态与低信噪比条件下的由FFT变换辅助的快速跟踪方法,并且比较了不同的跟踪方法的跟踪性能与时间。
In the satellite receivers, the digital phase-locked loops design plays a important role to communication systems. Now, low-orbit satellite receivers usually work in the conditions of high dynamic and low SNR, the convergence performance of phase-locked loops becomes terrible. In this paper, a FFT-assisted fast tracking method working in the conditions of high dynamic and low SNR is given, and different methods are compared.
出处
《电子设计工程》
2014年第14期174-176,共3页
Electronic Design Engineering
