DocumentCode :
2435083
Title :
Joint DOA-Frequency Offset Estimation and Data Detection in Uplink MIMO-OFDM Networks with SDMA Techniques
Author :
Wu, Kuo-Hsiung ; Fang, Wen-Hsien ; Chen, Jiunn-Tsair
Author_Institution :
Dept. of Comput. & Commun. Eng., De-Lin Inst. of Technol., Taipei
Volume :
6
fYear :
2006
fDate :
7-10 May 2006
Firstpage :
2977
Lastpage :
2981
Abstract :
This paper presents an antenna-array-assisted approach to jointly estimate nominal directions of arrival (DOAs) and frequency offsets, and detect data in uplink multiple-input-multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) wireless networks. To achieve this, two multiple signal classification (MUSIC)-based algorithms are first addressed to jointly estimate the nominal DOAs and frequency offsets of the incoming rays. The first algorithm is an extension of the classic two-dimensional (2-D) MUSIC, which, however, calls for enormous amount of computations. To alleviate the computational overhead, the second algorithm estimates the nominal DOAs and frequency offsets in a space-frequency-space (SFS) tree structure, in which two S-MUSICs and one F-MUSIC are invoked alternatively to estimate the nominal DOAs and the frequency offsets, respectively. In between every other MUSIC, a spatial beamforming process and a temporal filtering process are employed to decouple the uplink signals from different transmitters, thus enhancing the estimation accuracy. Thereafter, based on the estimated nominal DOAs and frequency offsets, a data detection procedure is also addressed. Simulations show that both algorithms can provide satisfactory performance while the SFS MUSIC calls for substantially lower computational complexity
Keywords :
MIMO systems; OFDM modulation; antenna arrays; computational complexity; direction-of-arrival estimation; filtering theory; frequency estimation; radio links; signal classification; space division multiple access; DOA; SDMA techniques; antenna-array-assisted approach; computational complexity; data detection; directions of arrival; frequency offset estimation; multiple signal classification; orthogonal frequency division multiplexing; space-frequency-space tree structure; spatial beamforming process; temporal filtering process; uplink MIMO-OFDM networks; wireless networks; Classification algorithms; Direction of arrival estimation; Directive antennas; Frequency estimation; MIMO; Multiaccess communication; Multiple signal classification; OFDM; Two dimensional displays; Wireless networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
ISSN :
1550-2252
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
Type :
conf
DOI :
10.1109/VETECS.2006.1683414
Filename :
1683414
Link To Document :
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