CAJ | 학술논문

结合当下流行的数据采集和虚拟仪器技术，采用 G 语言和 LabVIEW IDE 对通信系统中的解调系统进行了软件无线电设计。对本地文件中已有的已调信号以及外部通用数据采集卡采集的调幅和调频信号进行解调和分析，对调频信号的解调提出了一种软件脉冲均值标记滤波算法，该算法可以很好地实现调频波的解调。本系统还可以对实时信号波形数据进行保存、打印和对历史信号的回放。该系统彰显了数据采集技术和虚拟仪器技术在无线电领域的应用优越性。
결합당하류행적수거채집화허의의기기술，채용 G 어언화 LabVIEW IDE 대통신계통중적해조계통진행료연건무선전설계。대본지문건중이유적이조신호이급외부통용수거채집잡채집적조폭화조빈신호진행해조화분석，대조빈신호적해조제출료일충연건맥충균치표기려파산법，해산법가이흔호지실현조빈파적해조。본계통환가이대실시신호파형수거진행보존、타인화대역사신호적회방。해계통창현료수거채집기술화허의의기기술재무선전영역적응용우월성。
Combining with data acquisition and virtual instrument, this paper makes a design of demodulation system with software radio technology, by using G language and LabVIEW IDE. Based on demodulation and analysis on AM and FM signal collected by data acquisition card, and modulated signal in local machine, a pulse mean marker filtering algorithm is proposed to demodulate FM signal. Besides that, the soft radio system has some other functions such as printing and saving real-time signal, playback of historical signal. The soft radio system designed in this paper shows the superiority of data acquisition technology and virtual instrument technology in the radio domain.