Title :
Carrier Frequency Offset Compensation with Successive Cancellation in Uplink OFDMA Systems
Author :
Yücek, Tevfik ; Arslan, Hüseyin
Author_Institution :
Dept. of Electr. Eng., South Florida Univ., Tampa, FL
Abstract :
Similar to OFDM systems, OFDMA systems also suffer from frequency mismatches between the receiver and the transmitter. However, the fact that each uplink user has a different frequency offset makes the compensation more challenging than that of OFDM systems. This paper proposes successive interference cancellation (SIC) for compensating the frequency offset in the uplink OFDMA systems. A decorrelator is used to remove the inter-carrier interference (ICI) within a user´s signal and successive cancellation is applied to mitigate the multi access interference (MAI) arising due to the frequency difference among uplink users. The proposed algorithm is shown to eliminate the interference and has a manageable complexity.
Keywords :
OFDM modulation; decorrelation; frequency division multiple access; intercarrier interference; interference suppression; carrier frequency offset compensation; decorrelator; intercarrier interference; interference cancellation; multiaccess interference; receiver; transmitter; uplink OFDMA systems cancellation; Bandwidth; Feedback; Frequency domain analysis; Frequency estimation; Interference cancellation; Intersymbol interference; Iterative algorithms; Multiple access interference; OFDM; Silicon carbide;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.345
