一种基于2FSK数字调制方式的Duffing混沌解调方法  

A Method of Duffing Chaotic Demodulation Based on 2FSK Digital Modulation

作　　者：韩建群[1,2] 郑萍[2] 

机构地区：[1]渤海大学信息科学与工程学院,辽宁锦州121000 [2]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001

出　　处：《控制工程》2010年第1期83-85,共3页Control Engineering of China

基　　金：国家自然科学基金资助项目(50577011)

摘　　要：相干和非相干解调是2FSK数字通信中常用的方法,这两种方法实现正确解调的前提是解调器的输入信噪比不能太小,为了降低解调器输入信噪比,结合杜芬混沌系统所具有的较高检测微弱周期信号的能力,提出杜芬系统解调2FSK数字信号的方法,但是由于传统杜芬系统只适于检测低频信号,不能用于检测高频信号,因此建立了一种改进的杜芬系统,并将其运用到2FSK数字调制信号的解调过程中,Matlab仿真结果表明,杜芬混沌接收系统可以有效地解调2FSK信号,另外,该系统还可以很好地抵制其他载波频率信号的干扰。The problem of the input SNR of demodulator in coherent and non-coherent demodulation in 2FSK digital communication is discussed. Based on the high ability of detecting weak periodic signals, the Duffing system is applied into demodulation of 2FSK signals to decrease the input SNR of demodulator. To the problem that the traditional Duffing system is only suitable for detecting low frequency signals, and not for high frequency signals, an improved Duffing system is established. Simulation results by Matlab show that the chaotic Duffing receiving system can demodulate 2FSK signal effectively, and this system can also resist the disturbance of other cartier frequency signals.

关 键 词：通信技术 2FSK数字调制 杜芬系统 解调 仿真 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]