CAJ | 학술논문

宽带侦察接收机具备搜索时间短、截获概率高的特点，是实现移动通信信号管控的关键。为此分析了一种移动通信信号宽带侦察接收机自动增益控制方案。该技术通过模拟增益和数字增益联合控制，实现了利用宽带接收前端接收窄带信号时的恒包络控制，在移动通信电磁频谱监视、管控领域有广泛的应用前景。同时，以900 MHz GSM系统为例，给出了不同输入信号功率下的增益控制值和对应的最大瞬时动态范围，分析了影响系统灵敏度和瞬时动态的关键因素，为移动通信信号宽带侦察接收机的工程合理运用提供参考。
관대정찰접수궤구비수색시간단、절획개솔고적특점，시실현이동통신신호관공적관건。위차분석료일충이동통신신호관대정찰접수궤자동증익공제방안。해기술통과모의증익화수자증익연합공제，실현료이용관대접수전단접수착대신호시적항포락공제，재이동통신전자빈보감시、관공영역유엄범적응용전경。동시，이900 MHz GSM계통위례，급출료불동수입신호공솔하적증익공제치화대응적최대순시동태범위，분석료영향계통령민도화순시동태적관건인소，위이동통신신호관대정찰접수궤적공정합리운용제공삼고。
A wideband reconnaissance receiver has the features of short search time and high probability of interception, which plays a key role in monitoring and controlling the mobile communication signals. This paper analyzes a scheme of automatic gain control (AGC) of wideband reconnaissance receiver over mobile communication signal. This proposed scheme implements the constant envelope control of narrowband signals received by wideband receiving front-end, by means of the united control of analog and digital gains, which has a broad applicable prospect in monitoring and controlling of the EM spectrum in the field of mobile communication. Meanwhile, by taking the GSM of 900 MHz, it gives also the gain control values and the corresponding maximum of instantaneous dynamic range under various input signal powers and analyzes the key factors that affect the sensitivity and instantaneous dynamic of the system, thus offering a reference for the reasonable engineering application of wideband reconnaissance receiver over mobile communication signal.