摘要
本文讨论了实带通信号在二阶非均匀采样下的快速频域搬移、恢复,即用FFT方法将实带通信号恢复到两倍带宽(2B)内的复解析信号,而幅度和相位保持不变,最后经过简单的运算,得到原始频率。计算机模拟证实了上述方法。
Fast recovery and frequency-shifting of real bandpass signal based on second-order sampling is discussed. Using FFT and complex filtering, real bandpass signal can be recovered as a analytic signal whose central frequency is within two times of its bandwidth, and phase property is not changed. Finally, using simple computation, original frequency can be acquired. Computer simulation shows the correction of the method.
基金
电子部预研基金
关键词
非均匀采样
FFT
内插恢复
混叠
信号处理
Nonuniform sampling, FFT, Interpolation recovery, Aliasing, Frequency-shifting
