数字下变频器的matlab实现，一定的设计指标，可以用来知道vhdl程序设计,Digital Down Converter for matlab realized, certain design specifications that can be used to know VHDL Programming

在分析高效宽频带变频系统的基础上提出一种可以把变频部分与多种调制方式灵活结合在一起的方法，并以QAM调制为例，给出具体算法．分析结果表明，该方法降低了对处理速率的要求，提高了处理能力-In order to design an efficient and flexible DDC／DUC system，this paper combined the signal processing of DDC／DUC with QAM system and presented a new method ba

这是介绍DDC中常用CIC的设计仿真matlab程序。很有参考价值。-DDC is commonly used in CIC introduced the design of simulation matlab program. Useful reference.

matlab下实现DDC的设计,包括CIC，HB，Fir的设计。-Realization matlab DDC design，including CIC,HB,Fir filter.