Frequency Synchronization for the OFDMA Uplink Based on the Tile Structure of IEEE 802.16e

Author

Lin Bai ; Qinye Yin

Author_Institution

Minist. of Educ. (MOE) Key Lab. for Intell. Networks & Network Security, Xi´an Jiaotong Univ., Xi´an, China

Volume

61

Issue

5

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

2348

Lastpage

2353

Abstract

The multiple carrier frequency offsets (CFOs) of multiple users make frequency synchronization a challenging task in the orthogonal frequency-division multiple-access (OFDMA) uplink. In this paper, a computationally efficient iterative CFO estimation and compensation method for the OFDMA uplink with the generalized subcarrier allocation scheme (CAS) based on the tile structure of IEEE 802.16e is proposed. The proposed method only needs a few iteration cycles for its convergence. It greatly lowers the computational cost for the existing methods and can achieve better CFO estimation and compensation performance.

Keywords

OFDM modulation; WiMax; compensation; frequency division multiple access; iterative methods; radio links; synchronisation; CAS; IEEE 802.16e; OFDMA uplink; carrier frequency offset; compensation method; compensation performance; computational cost; convergence; frequency synchronization; generalized subcarrier allocation scheme; iteration cycle; iterative CFO estimation; orthogonal frequency-division multiple-access uplink; tile structure; Complexity theory; Computational efficiency; Estimation; IEEE 802.16 Standards; Iterative methods; Synchronization; IEEE 802.16e standard; iterative method; low complexity; orthogonal frequency-division multiple-access (OFDMA) uplink; synchronization;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2012.2190122

Filename

6165670