Design of a Direct Digital Frequency Synthesizer Based on Least Square Approximation
Jiang Ai-peng · Research & Progress of SSE Solid State Electronics · 2006
This paper presents a direct digital frequency synthesizer(DDFS) based on Least Square(LS) approximation. An approach of correcting error with unequal interval is also applied to optimize sine-cosine wave to make SFDR in worst situation be less than -80 dBc. Compared with the DDFS based on looking up table and other approximation approach, the implementation has the advantages of high precision, low error and simple structure.