The Designing Of Direct Digital Synthesis Based On FPGA

As a new communication system, Direct Digital Synthesis -DDS[13] is an important trend in the field of communications. A process by which you can digitally generate a frequency-agile, highly-pure sinewave, or arbitrary waveform, from an accurate reference clock.This paper is derived from the experiment of the Reconnaissance and Jamming for Ultrashort Frequency-Hopped Communications. The objective in this paper is to design Direct Digital Synthesis-DDS, which can detect the FM fast and the PM fast ,the delay of timing will be soluted.The work is organized as follows. Firstly, we introduce the theory of Direct Digital Synthesis-DDS, we design a Direct Digital Synthesis-DDS based on FPGA.The designing ideas, designing theory and realization methods are analyzed in detail. The designing and debugging for the system circuit is introduced in detail too.