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IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 10, OCTOBER 2007 1 Carrier Frequency Offset Compensation with
 

Summary: IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 6, NO. 10, OCTOBER 2007 1
Carrier Frequency Offset Compensation with
Successive Cancellation in Uplink OFDMA Systems
Tevfik Y¨ucek, Student Member, IEEE, and H¨useyin Arslan, Senior Member, IEEE
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 differ-
ent frequency offset makes the compensation more challenging
than that of OFDM systems. This letter 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.
Index Terms--OFDMA, frequency offset, successive cancella-
tion.
I. INTRODUCTION
RECENTLY, orthogonal frequency division multiple

  

Source: Arslan, Hüseyin - Department of Electrical Engineering, University of South Florida

 

Collections: Engineering