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Carrier Frequency Offset Compensation with Successive Cancellation in Uplink OFDMA Systems
 

Summary: Carrier Frequency Offset Compensation with
Successive Cancellation in Uplink OFDMA Systems
Tevfik Y¨ucek and H¨useyin Arslan
Department of Electrical Engineering, University of South Florida
4202 E. Fowler Avenue, ENB-118, Tampa, FL
yucek@eng.usf.edu and arslan@eng.usf.edu
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 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.
I. INTRODUCTION
Orthogonal Frequency Division Multiplexing (OFDM) is

  

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

 

Collections: Engineering