摘要
虽然船舶水上移动通信业务中使用自动识别的窄带直接印字电报设备已投入多年,但国内关于窄带直接印字电报研究仍集中在系统仿真、操作实践等问题上。对于窄带直接印字电报的ARQ工作方式信号接收研究较少。针对ARQ信号所采用的无前导同步序列的突发通信方式,本文提出了一种无同步序列突发的位定时同步方法,该方法以ARQ工作方式中呼叫码字段为同步序列,并利用ARQ通信协议中固定的450ms呼叫周期特性实现ARQ信号的位定时同步。该方法不需要设计复杂的时钟调整电路,设计简单,易于数字化实现。
Although the narrow band direct printing equipment automatic identification of ship has been used for many years. However,the research on the narrow band direct printing still focuses on the system simulation,operation practice and so on. The research on the ARQ mode of the narrow band direct printing is less. A burst communication mode without preamble synchronization sequence for the ARQ signals is adopted. In this paper,a code synchronization method without burst sequence is proposed. The method calls the call code array in the ARQ mode as a synchronous sequence. The code synchronization of the ARQ signal is realized by using the fixed 450 ms call cycle characteristic in ARQ communication protocol. This method does not require the design of complex clock adjustment circuit. It is simple to be designed,and easy to be implemented.
作者
周建英
杜亚琦
ZHOU Jian-ying;DU Ya-qi(No.36 Research Institute ofCETC,Jiaxing 314033,China;CETC Maritime Electronics Co.Ltd,Ningbo 315040,China;Science and Technology on Communication information Security Control Laboratory,Jiaxing 314033,China)
出处
《电子设计工程》
2018年第12期93-96,100,共5页
Electronic Design Engineering
