Title :
Hard Decision Parallel Interference Cancellation for uplink OFDMA
Author_Institution :
Nat. Inst. of Technol., Trichy
Abstract :
In this paper, is presented bit error performance of a hard decision based parellel interference cancellation scheme for multiuser multiple carrier systems. Due to difference in carrier frequency offsets (CFO) of different users at the receiver in a orthogonal frequency division multiple access (OFDMA) system, interference from other users occurs. A hard decision based parallel interference cancellation (HDPIC) scheme is used here to reduce the effect of this interference in uplink OFDMA. CFO compensation is done in the time domain followed by DFT operations and Interference estimation and cancellation in the frequency domain. A decrease in bit error rate is shown with the application of parallel interference cancellation as compared to performance without any cancellations.
Keywords :
OFDM modulation; discrete Fourier transforms; error statistics; frequency division multiple access; frequency-domain analysis; interference suppression; time-domain analysis; bit error performance; carrier frequency offsets; discrete Fourier transform; frequency domain; hard decision parallel interference cancellation; interference estimation; multiuser multiple carrier systems; time domain; uplink OFDMA; Bit error rate; Downlink; Frequency conversion; Frequency domain analysis; Frequency estimation; Interference cancellation; Next generation networking; OFDM; Oscillators; Transmitters; Carrier Frequency Offset (CFO); Interference Cancellation; uplink Orthogonal Frequency Division Multiple Access (OFDMA);
Conference_Titel :
Optical Internet and Next Generation Network, 2006. COIN-NGNCON 2006. The Joint International Conference on
Conference_Location :
Jeju
Print_ISBN :
978-89-955301-4-6
Electronic_ISBN :
978-89-955301-4-6
DOI :
10.1109/COINNGNCON.2006.4454681
