A Direct Digital Frequency Synthesizer based on CORDIC algorithm Implemented with FPGA

摘要

A direct digital frequency synthesizer (DDFS) applied to digital modulation is presented, which can synthesize a 16-bit output sine and cosine wave with a spectrum density of-100dB at 50 MHz. The synthesizer covers a bandwidth from de to 25 MHz in steps of 0.18 Hz with latency of 11 clock cycles. The structure is based on CORDIC algorithm. The whole digital system is implemented with FPGA.