基于FPGA的DDS信号发生器的简单实现。DDS（直接数字合成）是近年来迅速发展起来的一种新的频率合成方法。这种方法简单可靠、控制方便，且具有很高的频率分辨率和转换速度，非常适合快速跳频通信的要求。 -FPGA-based signal generator DDS simple to achieve. DDS (direct digital synthesis) is a rapidly in recent years developed a new method of frequency synthesis. This method is simple and reliable, convenient control, and has a very high frequency resolution and conversion speed, very suitable for fast frequency-hopping communication requirements.