光通信数字接收中位同步信号的智能提取

在光通信数字接收机中,为了达到系统的位同步,结合数字锁相环的基本原理,采用现场可编程技术,设计了位同步信号的时序逻辑电路,并用FPGA芯片实现了整个位同步电路.通过单片机实时控制FPGA,进行频带宽度和中心频率的实时调节,实现了位同步信号的智能提取.仿真分析和实际测试表明,该系统具有实时跟踪,提取快速且稳定,抗干扰能力强,升级方便等特点.

Intellectual Extraction of Bit Synchronization for Optical Communication Digital Circuit

In order to achieve bit synchronization in the optical communication digital receiving circuit, combined with fundamental of digital PLL, timing logical circuit of bit synchronization circuit is designed, and the whole circuit is programmed in FPGA chip via field programmable technology. In addition, single chip controls FPGA, frequency band and central frequency are timely regulated, intellectual extraction of bit synchronization is realized. Simulation analysis and practical test indicates that the system have the characteristics of timely track, quick and stable extraction, strong anti jamming and conven lent upgrade.