Title :
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
fDate :
6/1/2012 12:00:00 AM
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;
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2012.2190122
