TY - GEN
T1 - The design of direct digital frequency synthesis based on ROM lookup table
AU - Gan, Ming Gang
AU - Chen, Jie
AU - Cheng, Lan
AU - Yu, Ting
PY - 2009
Y1 - 2009
N2 - The existing direct digital frequency synthesis (DDFS) only can generate one kind of waveform with one read-only memory lookup table (ROM LUT), which cannot provide in-phase wave and quadrature wave for global position system(GPS) carrier tracking . A DDFS is designed based on ROM LUT. Using the symmetry of the sine wave and the property that cosine waveform is leading or lagging one fourth period compared with sine waveform , only one fourth of the storage table of sin waveform is needed to develop both the whole sin wave and cosine wave. The pipeline technique is utilized to improve the working speed of the system. Assisted by Quartus II software and very high speed integrated circuit hardware description language(VHDL), a simulation to the designed DDFS is finished with a good result. At last, an error analysis is made to the result of simulation.
AB - The existing direct digital frequency synthesis (DDFS) only can generate one kind of waveform with one read-only memory lookup table (ROM LUT), which cannot provide in-phase wave and quadrature wave for global position system(GPS) carrier tracking . A DDFS is designed based on ROM LUT. Using the symmetry of the sine wave and the property that cosine waveform is leading or lagging one fourth period compared with sine waveform , only one fourth of the storage table of sin waveform is needed to develop both the whole sin wave and cosine wave. The pipeline technique is utilized to improve the working speed of the system. Assisted by Quartus II software and very high speed integrated circuit hardware description language(VHDL), a simulation to the designed DDFS is finished with a good result. At last, an error analysis is made to the result of simulation.
KW - Cosine wave
KW - Direct digital frequency synthesis
KW - Global position system
KW - Sin wave
KW - VHDL
UR - https://www.scopus.com/pages/publications/77949610949
U2 - 10.1109/ICIECS.2009.5363868
DO - 10.1109/ICIECS.2009.5363868
M3 - Conference contribution
AN - SCOPUS:77949610949
SN - 9781424449941
T3 - Proceedings - 2009 International Conference on Information Engineering and Computer Science, ICIECS 2009
BT - Proceedings - 2009 International Conference on Information Engineering and Computer Science, ICIECS 2009
T2 - 2009 International Conference on Information Engineering and Computer Science, ICIECS 2009
Y2 - 19 December 2009 through 20 December 2009
ER -