Title :
Blind Carrier Frequency Offset Estimation for MIMO OFDMA Uplink
Author :
Zhang, Weile ; Chen, H. ; Yin, Qinye ; Ohtsuki, T.
Author_Institution :
MOE Key Lab. for Intell. Networks & Network Security, Xi´´an Jiaotong Univ., Xi´´an, China
Abstract :
In this paper, we develop a new subspace based multiuser carrier frequency offset (CFO) estimation scheme for multi-input multi- output (MIMO) orthogonal frequency division multiple access (OFDMA) uplink transmission. We exploit the rank reduction approach by equipping multiple antennas at the receiver, in which the CFO of each user is derived blindly using one dimension (1-D) search individually. The proposed scheme supports the generalized subcarrier assignment scheme and full loaded transmission with all subcarriers being allocated to users. Numerical results are provided to corroborate the proposed studies.
Keywords :
MIMO communication; OFDM modulation; antenna arrays; frequency division multiple access; frequency estimation; search problems; 1D search; MIMO OFDMA uplink transmission; blind carrier frequency offset estimation; generalized subcarrier assignment scheme; multiinput multioutput uplink transmission; multiple antennas; one dimension search; orthogonal frequency division multiple access uplink transmission; subspace based multiuser CFO estimation scheme; subspace based multiuser carrier frequency offset estimation scheme; Estimation; Frequency estimation; OFDM; Receiving antennas; Signal to noise ratio; Synthetic aperture sonar; Vectors;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6134193
