A virtual orthogonal output direct digital frequency synthesizer design and implementation

In this paper a comparison between the existing ROM compression techniques was performed. Inaccuracies and shortages of previous techniques are pointed out. A virtual orthogonal output direct digital frequency synthesizer is presented. Using a new decomposition method, it can achieve more accuracy outputs and doesn´t require any ROM tables. A new graphical programming environment, namely LabVIEW (laboratory virtual instrument engineering workbench), is adopted in this paper for designing and implementation. Because LabVIEW allows multiple operations to be performed in parallel, the virtual orthogonal output DDFS is better for high-speed applications.