Improved Detection of Uplink OFDM-IDMA Signals with Carrier Frequency Offsets

Author

Peng, Tao ; Xiao, Yue ; He, Xu ; Li, Shaoqian

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

16

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

646

Lastpage

649

Abstract

This letter proposes an improved detection scheme to mitigate the influence of carrier frequency offsets (CFOs) in uplink orthogonal frequency division multiplexing-interleave division multiple access (OFDM-IDMA) systems. The basic principle is to iteratively estimate and cancel the combined interference from multiple users and CFOs at the receiver so that the additional interference due to the residual CFOs from other users can be suppressed. Simulation results show that the proposed scheme can effectively eliminate the interference and significantly improve the system performance in the presence of CFOs.

Keywords

OFDM modulation; interference suppression; iterative methods; multi-access systems; signal detection; carrier frequency offsets; interference elimination; iterative estimation; residual CFO; system performance; uplink OFDM-IDMA signals detection; uplink orthogonal frequency division multiplexing-interleave division multiple access system; AWGN; Bit error rate; Interference; OFDM; Rayleigh channels; Receivers; CFOs; IDMA; OFDM;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.030512.112496

Filename

6168150