DocumentCode :
1749518
Title :
Channel-independent non-data aided synchronization of generalized multiuser OFDM
Author :
Pompili, Massimiliano ; Barbarossa, Sergio ; Giannakis, Georgios B.
Author_Institution :
INFOCOM Dept., Rome Univ., Italy
Volume :
4
fYear :
2001
fDate :
2001
Firstpage :
2341
Abstract :
We develop and analyze timing and carrier frequency offset synchronization algorithms for generalized asynchronous and quasi-synchronous orthogonal frequency division multiple access systems using null subcarriers and subcarrier hopping. We derive an approximate analytic expression for the variance of the frequency offset estimators as a function of the number of active users and the SNR and show that the performance of our algorithms is asymptotically independent of the channel zero locations for quasi-synchronous systems. Finally, we validate our theoretical expressions with simulations
Keywords :
OFDM modulation; approximation theory; frequency division multiple access; multiuser channels; noise; synchronisation; SNR; approximate analytic expression; carrier frequency offset synchronization algorithms; channel-independent nondata aided synchronization; frequency offset estimators; generalized asynchronous OFDMA; generalized multiuser OFDM; null subcarriers; orthogonal frequency division multiple access; quasisynchronous OFDMA; simulations; subcarrier hopping; timing offset synchronization algorithms; Algorithm design and analysis; Downlink; Frequency conversion; Frequency diversity; Frequency estimation; Frequency synchronization; Intersymbol interference; OFDM; Performance analysis; Timing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
ISSN :
1520-6149
Print_ISBN :
0-7803-7041-4
Type :
conf
DOI :
10.1109/ICASSP.2001.940469
Filename :
940469
Link To Document :
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