一种FSK信号调制解调电路的设计
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摘要
介绍了一种FSK信号调制解调电路的设计思想,发送端采用锁相环芯片CD4046实现了基带信号的FSK调制,接收端采用普通鉴频法进行解调,将FSK信号转换为ASK信号,并采用检波和低通滤波电路恢复出其基带信号。该电路具有结构简单、成本低廉、工作可靠等优点,可适用于低速电力线载波通信中。
This paper describes a method of design for FSK modem.Adopting the phaselocked loop chip CD4046 at the sendingend to realize FSK modulation for baseband signal,and the frequency discrimination method is adopted to transform FSK signal into ASK signal at the receiving end.The detection circuit and low pass filter circuit are used to recover their baseband signal.This kind of circuit has the advantage of simple structure,cheap cost and being reliable work,and applicable for the lowspeed power line carrier communication.
This paper describes a method of design for FSK modem.Adopting the phaselocked loop chip CD4046 at the sendingend to realize FSK modulation for baseband signal,and the frequency discrimination method is adopted to transform FSK signal into ASK signal at the receiving end.The detection circuit and low pass filter circuit are used to recover their baseband signal.This kind of circuit has the advantage of simple structure,cheap cost and being reliable work,and applicable for the lowspeed power line carrier communication.
引文
[1]刘美兰,张开生,李莉.基于低压端电力网的远程抄表监控系统[J].西北轻工业学院学报,1999,(3):9195.
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[5]豆耀华.群集放大、鉴频和锁笔电路的研制[J].西北地震学报,1997,(1):8586.
[6]吴仲光.FSK调制解调器的单片机实现[J].四川大学学报,1995,(6):642643.
[2]柳永智,刘晓川.电力系统远动[M].北京:中国电力出版社,2002.
[3]田日才,刘文贵.低速FSK制式的Modem[J].黑龙江通信技术,1995,(2):46.
[4]盛寿麟.电力系统远程监控原理[M].北京:中国电力出版社,1998.
[5]豆耀华.群集放大、鉴频和锁笔电路的研制[J].西北地震学报,1997,(1):8586.
[6]吴仲光.FSK调制解调器的单片机实现[J].四川大学学报,1995,(6):642643.
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