Title :
An OFDM timing synchronization ASIC
Author :
Johansson, Stefan ; Nilsson, Martin ; Nilsson, Peter
Author_Institution :
Dept. of Appl. Electron., Lund Univ., Sweden
Abstract :
In this paper an OFDM timing synchronization ASIC is presented. The proposed synchronization unit can be used in any OFDM system. The algorithm is based on the correlation introduced by the cyclic prefix, which is exploited in the time domain where the time offset is estimated. Although the algorithm is too complex to be implemented on today´s most powerful standard DSP, a hardware architecture that is optimized for the algorithm is implemented with moderate complexity. The unit contains 32 kbit RAM and 3000 gates. At the sample rate of 25 Msamples/s the power consumption is 16 mW, which is small for such a complex algorithm
Keywords :
CMOS digital integrated circuits; OFDM modulation; application specific integrated circuits; digital signal processing chips; synchronisation; telecommunication computing; telecommunication equipment; timing; 0.35 micron; 16 mW; 32 kbit; DSP; OFDM timing synchronization ASIC; correlation; cyclic prefix; hardware architecture; synchronization unit; time offset estimation; Application specific integrated circuits; Digital signal processing; Energy consumption; Frequency estimation; Frequency synchronization; Land mobile radio; Maximum likelihood estimation; OFDM modulation; Phase modulation; Timing;
Conference_Titel :
Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on
Conference_Location :
Jounieh
Print_ISBN :
0-7803-6542-9
DOI :
10.1109/ICECS.2000.911547
