直接数字频率合成的DSP实现

Direct Digital Frequency Synthesizer Implementation with DSP

介绍了一种实现直接数字频率合成（ＤＤＦＳ）的数字信号处理方法，其基本思想基于脉冲响应为正弦波的二阶ＩＩＲ谐振器，采用这种方法可以产生出比常规的基于正弦查表的ＤＤＦＳ实现方法多的频率种类，而且具有频谱纯度高、硬件设计简单、小型、可靠等优点。

This paper describes a digital signal processing method of DDFS .The basic point of this method is based on the second order IIR resonator ,whose impluse response is a sine wave. This technique have advantages over the conventional sine look up table method in a larger set of output frequencies, high spectral purity and very simple, compact, and reliable hardware design.