摘要
近年来,软件无线电技术以其强大的通用性和灵活性得到了广泛发展和应用。研究了软件无线电中广泛采用的带通采样技术。在给出带通采样定理一般结论的基础上,重点分析了实现无混叠带通采样的条件,得到了边界频率点上4种不同取值情况下带通采样频率的取值范围,并利用时域内插进行了带通采样信号的完全重建。最后,采用Matlab进行了仿真验证。
In recent years, software defined radio technology has been developed and applied widely because of its powerful universality and flexibility. In this paper, bandpass sampling technology widely used in software defined radio is studied. Based on bandpass sampling principle, conditions of alias-free bandpass sampling are mainly analyzed and sampling frequency ranges under four different conditions of taking values at edge frequency points are given. Complete reconstruction of the signal is carried out by utilization of time domain interpolation. Finally, verification of the simulation is carried out by Matlab.
出处
《无线电工程》
2007年第1期26-29,共4页
Radio Engineering
关键词
软件无线电
带通采样
采样速率
频谱混叠
software defined radio
bandpass sampling
sampling rate
spectrum alias
