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本文述及一种独立同步方式,它使通信机收发双方在较短的瞬间建立同步,将发送端以某种编码形式传送的信息在接收端得到精确地解译恢复出原始信息.传送的同步信息包括位同步信息及启动帧同步信息,而在这两个相关联的信息之间,又建立了一个固有的特定时间关系以保障可靠地同步.此外,对这两个重要的信息信号,又采用了适当的技术措施使该方法能适用于短波信道.至于其传输制度则采用了性能较佳的相对移相制.在整个设备中数字电路部分可以采用集成电路,模拟电路部分也可采用一些线性集成电路.此方法简易,调测方便,工作可靠.试验结果表明,即使在较短的短波信道上(例如信噪比仅有几个分贝时)仍有较好的工作性能.
This paper describes a kind of independent synchronization method, which makes both the sender and the receiver of the communication machine establish synchronization in a short moment, and the information sent by the sender in some coding form can be accurately decoded and recovered by the receiver to recover the original information. The information includes bit synchronization information and start frame synchronization information, and an intrinsic specific time relationship is established between the two related information to ensure reliable synchronization. In addition, for these two important information signals, Using the appropriate technical measures to make the method suitable for short-wave channel.As for its transmission system is used with better performance relative phase-shift system.In the whole device digital circuit can be part of the integrated circuit, the analog circuit part can also be used Linear integrated circuit.This method is simple, easy to adjust and work reliably.Experimental results show that there is still a good working performance even in the short HF channel (for example, the signal to noise ratio is only a few decibels).