Analysis of the Generation of DDS FM Wave by Single Frequency-Modulated Signal and Realization on FPGA
Wei Shi · Audio Engineering · 2005
According to the principle of Direct Digital Synthesis,an idea for generating DDS frequency-modulated wave by single signal is presented by adjusting frequency control word in look-up-table to achieve digit sequence. Theoretical study and analysis are carried out. The conclusion is acquired and simulated by MATLAB 6.5,and applied on FPGA design by QuartusⅡ3.0. The experiment shows that the way is feasible. The design method of signal sequence generator is introduced. The process of study and analysis of frequency control word,practical FPGA design plan,and simulation and experiment result are given mainly in the paper.