Title :
Hard Decision Parallel Interference Cancellation for uplink OFDMA
Author_Institution :
Emuzed India Private Ltd., Bangalore
Abstract :
In this paper, is presented the bit error performance of a hard decision based parallel interference cancellation scheme for multiuser multiple carrier systems. Due to the difference in carrier frequency offsets (CFO) of different users at the receiver in an orthogonal frequency division multiple access (OFDMA) system, interference from other users occur. 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; BER; CFO compensation; DFT operation; HDPIC scheme; bit error rate; carrier frequency offset; discrete Fourier transform; frequency domain analysis; hard decision parallel interference cancellation; interference estimation; multiuser multiple carrier system; orthogonal frequency division multiple access; receiver; uplink OFDMA system; Bit error rate; Downlink; Frequency conversion; Frequency domain analysis; Frequency estimation; Interference cancellation; OFDM modulation; Oscillators; Software systems; Transmitters;
Conference_Titel :
Communications, Circuits and Systems Proceedings, 2006 International Conference on
Conference_Location :
Guilin
Print_ISBN :
0-7803-9584-0
Electronic_ISBN :
0-7803-9585-9
DOI :
10.1109/ICCCAS.2006.284763
