软件无线电中欠采样信号恢复方法研究

摘要

As sub-Nyquist sampling signal recovering method is proposed for the frequency spectrum distortion phenomenon in software radio system. Firstly, the middle frequency A/D signals are interpolated and filtered, and then the interpolated signals are processed with mix-frequency method. Finally, the mix-frequency signals are recovered with D/A component. The validity of the method proposed in this paper is validated on hardware platform.%针对软件无线电中欠采样信号在D/A恢复后频谱失真现象提出了一种欠采样信号恢复方法。首先，通过对中频A/D采样信号进行插值滤波处理；其次，对插值滤波后的信号进行混频滤波处理；最后，对混频滤波后的信号进行D/A恢复。通过硬件平台试验验证了本文方法的有效性。