一种EPIRB信号频率跟踪和测量方法的研究

Research on EPIRB signal's frequency tracking and measuring method

提出了EPIRB发射信号自适应的载频跟踪和测量方案。首先介绍EPIRB发射信号的参数和Coatas环跟踪载频的原理,然后提出了FFT粗测频与软件Coatas环相结合的跟踪测频方法,用于测量EPIRB发射信号的载频,最后对每个新增信道的信号进行仿真,结果表明在每个信道中,该方法不仅可提高锁相环锁定速度,还在低噪声条件下,具有获得高精度载波频率的能力。

According to EPIRB signal,the paper proposes an adaptive carrier frequency tracking and measuring programs.First it introduces the parameters of EPIRB signal and the principle of carrier frequency tracking using Coatas loop,then puts forward frequency measurement method by FFT combined with the software Coatas loop and measuring the signal carrier frequency,finally the simulation results indicate that in each the new channels,this method not only can improve the phase lock loop speed,but can get high precision carrier frequency in the low noise conditions.