从多个频谱连续的射频信号中带通采样 一个射频信号-Bandpass sampling of one RFsignal over multiple RF signals with contiguous spectrums

射频直接带通采样软件无线电接收机的研究，射频直接带通采样软件无线电接收机的研究-RF Direct bandpass sampling of software radio receiver

介绍了一种基于软件无线电技术的多制式电台测试系统。该系统采用了直接射频采样，以硬件实现实时数字下变频与上变频，以软件在零中频信号上实现多制式调制解调的结构，从而可应用于对多制式电台的性能参数自动测量。 -Introduced multi-standard radio test system based on software radio technology. The system uses direct RF sampling, implemented in hardware real-t