电离层探测系统中数据通信的同步技术

在数字通信系统中,同步技术起着非常关键的作用,好的同步方法可以有效降低系统的误码率,提高通信质量。首先分析了利用脉冲线性调频信号进行数据通信的原理,进而根据脉冲线性调频信号和π/4-DQPSK调制的特点,提出了一种利用脉冲线性调频信号进行数据通信的同步方法,包括时间同步、符号同步和同步跟踪,并分别对其进行了详细的说明。最后用Matlab进行了仿真,结果表明,该方法很好地实现了符号同步并进行了有效的跟踪,完全满足系统同步要求。

Research on Timing Technique in Data Communication Based on LFM

In digital communication system,the timing technique plays an important role.A good Timing technique can reduce BER effectively,and improve the quality of communication.First,this paper analyzes the theory of data communication based on LFM.Then,according to the characteristics of LFM and /4-DQPSK modulation,it presents a valid timing method about the present communication system,including timing and tracking,and describes them in detail.Finally,it gives the simulation of Matlab.The simulation results indicate that this timing technique can achieve timing and tracking,and meets the system requirements completely.