Some Key Methods of ROM Compression in the DDS
T.-H. Cheng · Tianjin Communications Technology · 2004
Direct Digital Frequency Synthesis(DDS)with Read Only Memory(ROM)performs functional mapping from phase to sine amplitude.The spectral purity of the conventional DDSis determined by the size of table ROM.Unfortunately,large ROM storage means high power consumption,lower reliability.In order to meet the total system performance's need and reduce the cost of system,many people begin to find the better methods of ROM compression.This paper described some key methods of ROM compres-sion and compared their performance.