A Low Complexity Multiuser Interference Compensation Scheme for OFDMA Uplink

Author

Zhang, Yang ; Li, Jiandong ; Pang, Lihua ; Liu, Qin

Author_Institution

State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´´an, China

fYear

2012

fDate

6-9 May 2012

Firstpage

1

Lastpage

6

Abstract

This paper investigates the multiuser interference mitigation for the uplink of an orthogonal frequency division multiple access system in a doubly selective fading channel. The proposed algorithm squeezes the interference of subcarrier k into 2τ+1 neighboring subcarriers by preprocessing the received signal and yields a banded structure interference matrix. Specifically, the value of τ mainly depends on the carrier frequency offsets and determines the squeezing depth which in turn influences the receiver implementation complexity. Simulation results show that the bit error rate performance of our proposed algorithm approaches the existing full length minimum mean square error equalizer with a significant reduction on complexity.

Keywords

OFDM modulation; error statistics; fading channels; frequency division multiple access; interference (signal); least mean squares methods; OFDMA uplink; banded structure interference matrix; bit error rate; doubly selective fading channel; low complexity multiuser interference compensation; minimum mean square error equalizer; multiuser interference mitigation; orthogonal frequency division multiple access system; receiver implementation complexity; Complexity theory; Equalizers; Fading; Interference; Mobile communication; OFDM; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2012 IEEE 75th

Conference_Location

Yokohama

ISSN

1550-2252

Print_ISBN

978-1-4673-0989-9

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2012.6239933

Filename

6239933