Realization of DDC method in software radios
Zheng Li · Digital Communication · 2010
This paper introduces the basic principle and the application of digital down conversion(DDC) based on software radio and the general structure of DDC.The signal of intermediate frequency and the signal of carrier wave were mixed up in the DDC,the mixed signal passed through lowpass filter,and thus the function of down conversion was implemented.The paper presents the lookup table and the process of using CORD IC to realize DDC.