【摘要】 带通信号的正交采样与处理是在对带通信号进行A/D变换后直接利用数字信号处理算法进行相干检波。本文讨论了三种带通信号的数字正交采样方法:低通滤波法、Hilbert变换法、傅立叶变换法,计算机模拟仿真试验证明,基于傅立叶变换的数字正交采样法获得的信号正交采样数据精度最高(镜频分量的抑制比最高)。更多还原

【Abstract】 Quadrature samping and processing approach of bandpass signal is samping the bandpass signal and detecting by way of DSP. In this paper, three bandpass digital quadrature sampling are discussed, based on discrete lowpass filter, Hil-bert transform and discrete Fourier transform. The results of computer simulation illustrate that the method based on FFT achieves highest quadrature sampling accuracy.更多还原