Carrier Frequency Offset Estimation for OFDMA Uplink Using Multi-Antenna

Author

Zhang, Weile ; Yin, Qinye ; Wang, Wenjie

Author_Institution

MOE Key Lab. for Intell. Networks & Network Security, Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2010

fDate

23-27 May 2010

Firstpage

1

Lastpage

5

Abstract

In this paper, a novel method is proposed for carrier-frequency offset (CFO) estimation for multi-user in orthogonal frequency division multiple access (OFDMA) uplink. Generalized carrier assignment scheme (GCAS) is supported in order to allow dynamic resource allocation and provide more flexility. The base station is equipped with multi-antenna. Each user´s CFO can be estimated by a closed form based on ESPRIT-like method utilizing the rotation invariance of the space-domain snapshot matrix. The method is still effective even in fully loaded system with all subcarriers allocated to users, and the computational complexity can be adjusted dynamically according to the system assignment scheme.

Keywords

Base stations; Broadband communication; Computational complexity; Content addressable storage; Direction of arrival estimation; Frequency conversion; Frequency estimation; Multiple access interference; Resource management; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (ICC), 2010 IEEE International Conference on

Conference_Location

Cape Town, South Africa

ISSN

1550-3607

Print_ISBN

978-1-4244-6402-9

Type

conf

DOI

10.1109/ICC.2010.5501778

Filename

5501778