Performance of Adaptive Partial Interference Cancellation for Near-Far Environments in OFDMA Systems

Author

Huang, Yung-Fa ; Tan, Tan-Hsu ; Cheng, Chia-Hsing

Author_Institution

Dept. of Inf. & Commun. Eng., Chaoyang Univ. of Technol., Taichung, Taiwan

fYear

2012

fDate

4-6 July 2012

Firstpage

469

Lastpage

474

Abstract

In this paper, the performance of parallel interference cancellation (PIC) multi-user detectors in orthogonal frequency division multiple access (OFDMA) mobile communication systems is investigated. In multi-user systems, the multi-user interference (MUI) degraded the system performance, especially in near-far effect environments. An adaptive weight partial PIC (AWPPIC) scheme is proposed to reduce the MUIs and to improve the bit error rate (BER) performance for uplink OFDMA systems. Simulation results show that under the near far problems for block sub carrier assignment (BCA) scheme, the AWPPIC scheme can improve the BER performance no matter what the system load is.

Keywords

OFDM modulation; error statistics; frequency division multiple access; interference suppression; mobile radio; multiuser detection; AWPPIC scheme; BCA scheme; BER performance; MUI; PIC multiuser detectors; adaptive partial interference cancellation; adaptive weight partial PIC scheme; bit error rate; block subcarrier assignment scheme; mobile communication systems; multiuser interference; near-far environments; orthogonal frequency division multiple access system; uplink OFDMA systems; Adaptive systems; Bit error rate; Detectors; Interference; Mobile communication; OFDM; OFDMA; block subcarrier assignment; multiuser detection; near far problems; parallel interference cancellation;

fLanguage

English

Publisher

ieee

Conference_Titel

Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS), 2012 Sixth International Conference on

Conference_Location

Palermo

Print_ISBN

978-1-4673-1328-5

Type

conf

DOI

10.1109/IMIS.2012.23

Filename

6296899