基于多相滤波法的中频信号正交解调的CPLD实现

正交相干检波可以将复包络的所有信息进行保留,所以在数字信号处理中得到广泛应用。该文讨论了数字信号正交相干检波的多相滤波实现方法,并且给出了基于 CPLD 的 IC 实现。计算机仿真结果表明,多相滤波方法可以提高信噪比,实现高性能数字信号处理的要求。

Implementation with CPLD of IF Signals by Quadrature Demodulation Based on Polyphase Filtering

Quadrature coherent detection can reserve all information of the complex envelope of signals, and it is therefore widely used in signal processing. This paper discusses a digital quadrature coherent detection realization by ployphase filtering and the IC design of the quadrature interpolator based on CPLD. Results show that this method can improve the ability of SNR by polyphase filtering and satisfy the demand of high performance digital signal processing.