Title :
On the uplink synchronization of OFDMA systems
Author :
Bala, Erdem ; Cimini, Leonard J., Jr.
Author_Institution :
Dept. of Electr. & Comput. Eng., Delaware Univ., Newark, DE
Abstract :
In this paper, we study symbol timing synchronization for the uplink of an OFDMA system in a multipath fading channel. The effects of timing offsets on both synchronized and unsynchronized users are investigated and performance degradation is illustrated. Then, a simple timing offset estimator is developed and its performance is evaluated. The symbol-error rate of the compensated system is also presented. Simulation results demonstrate that this estimator performs well even for large offsets and in the presence of significant levels of noise
Keywords :
fading channels; frequency division multiple access; multipath channels; radio links; synchronisation; OFDMA systems; multipath fading channel; performance degradation; performance evaluation; symbol timing offset synchronization; symbol-error rate; uplink synchronization; Collaborative work; Degradation; Downlink; Frequency estimation; Frequency synchronization; Government; Intersymbol interference; OFDM; Timing; Transmitters;
Conference_Titel :
Military Communications Conference, 2005. MILCOM 2005. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-9393-7
DOI :
10.1109/MILCOM.2005.1605831
