Title :
A new approach for symbol frame synchronization and carrier frequency estimation in OFDM communications
Author :
Gunther, Jacob H. ; Liu, Hui ; Swindlehurst, A. Lee
Author_Institution :
Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA
Abstract :
This work considers the problem of jointly estimating symbol frame boundaries and carrier frequency offsets for orthogonal frequency division multiplexed (OFDM) communications in frequency selective fading environments. Orthogonality between the modulated and virtual carriers over an interference free window of the received signal is used to develop an algorithm for estimating the carrier frequency offset and detecting the beginning of a symbol frame. By using a cyclic prefix to remove interference from neighboring frames, the the method is applicable in the presence of dispersive channels. The main contribution of this work is the joint estimation of the frequency offset and the frame boundary
Keywords :
OFDM modulation; dispersive channels; fading channels; frequency estimation; interference suppression; synchronisation; OFDM communications; carrier frequency estimation; carrier frequency offsets; cyclic prefix; dispersive channels; frequency selective fading environments; interference free window; modulated carriers; orthogonal frequency division multiplexed communications; symbol frame; symbol frame boundaries; symbol frame synchronization; virtual carriers; Demodulation; Fading; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Interference; Jacobian matrices; OFDM modulation; Oscillators; Timing;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5041-3
DOI :
10.1109/ICASSP.1999.761307
