Title :
Enhanced OFDM time and frequency synchronization through optimal code correlation
Author :
Liu, Dongfang ; Chung, Jong-Moon
Author_Institution :
Sch. of Electr. & Comput. Eng., Oklahoma State Univ., Stillwater, OK, USA
Abstract :
A pseudo-random noise (PN)-sequence synchronization method is proposed for orthogonal frequency division multiplexing (OFDM) time and frequency synchronization. By using two PN-sequences as the OFDM training symbols, all synchronizations can be accurately achieved. The peak correlation property of the PN-sequence makes time synchronization much more robust and accurate. Frequency synchronization precision is improved by averaging over the whole PN-sequence. At the same time, this method has it large frequency synchronization range. Finally, the residue time offset is estimated into the channel response.
Keywords :
OFDM modulation; channel estimation; correlation methods; pseudonoise codes; random sequences; synchronisation; channel response; frequency synchronization; optimal code correlation; orthogonal frequency division multiplexing; pseudo-random noise sequence; residue time offset; time synchronization; training symbol; Broadband communication; Data communication; Fading; Frequency domain analysis; Frequency estimation; Frequency synchronization; Laboratories; Noise robustness; OFDM; Training data;
Conference_Titel :
Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on
Print_ISBN :
0-7803-7523-8
DOI :
10.1109/MWSCAS.2002.1187185
