Title :
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
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;
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town, South Africa
Print_ISBN :
978-1-4244-6402-9
DOI :
10.1109/ICC.2010.5501778
