摘要
水下激光通信由于信道的特殊性,对于调制解调的方式比常规的激光通信有独特地要求。采用脉冲位置调制解调方式实现的水下激光通信系统兼顾了带宽利用率和功率利用率,有着巨大的应用前景。考虑以往的脉冲位置调解系统都是板级电路,如何将系统单片集成化已成为一种趋势。传统的脉冲位置解调系统有的是对频率要求较为苛刻,或者是采用了模拟器件,因此并不适合单片集成化。针对脉冲位置通信的特点,提出了一种新特别的数字锁相环的解决方式,来实现PPM信号的时隙同步,避免了传统的数字锁相结构由于调整时钟周期,而带来的逻辑延迟不足的风险。同时针对激光通信的特点,也提出了一种新的帧同步解决方式。最后的结果在Xilinx的ML505上验证通过。
Underwater laser communication has special demands in the method about modulated and demodulated on account of its specialty channel. Implementation underwater laser communication system utilized PPM is a compatible is an optimum future. It is a trend to make the whole system in an integrated circuit. The tradition PPM system is not suit for integration on a chip. It raised a new method to synchronization slot by using specify digital phase locked loop. It can reduce the risk of logic delay lack for traditional DPLL change clock period .For laser communications, it provided a special way to synchronization frame .And The whole design is verified in Xilinx ML505.
出处
《微计算机信息》
2010年第2期159-160,207,共3页
Control & Automation