EM Based Semi-Blind Beamforming Algorithm in MIMO-OFDM Systems

Author

Zamiri-Jafarian, H. ; Bokharaiec-Najafee, S. ; Pasupathy, S.

Author_Institution

Ferdowsi Univ., Mashhad

fYear

2007

fDate

22-24 Aug. 2007

Firstpage

190

Lastpage

193

Abstract

A new EM based semi-blind beamforming algorithm is proposed in this paper for multiple input multiple output (MIMO) systems in which orthogonal frequency division multiplexing (OFDM) technique is used. Employing singular value decomposition (SVD) technique, the semi-blind beam-forming algorithm eliminates space interference in an iterative manner by shaping antenna patterns in transmitter and receiver sides in frequency domain. A 16-QAM MIMO-OFDM system is considered for computer simulations in order to evaluate the performance of the new algorithm under different scenarios. The results show that the proposed algorithm outperforms subspace based semi-blind beamforming method.

Keywords

MIMO communication; OFDM modulation; expectation-maximisation algorithm; quadrature amplitude modulation; singular value decomposition; antenna patterns shaping; computer simulations; expectation maximization; frequency domain; multiple input multiple output systems; orthogonal frequency division multiplexing; quadrature amplitude modulation; receiver; semiblind beamforming algorithm; singular value decomposition; space interference; transmitter; Array signal processing; Frequency domain analysis; Interference elimination; Iterative algorithms; MIMO; OFDM; Receiving antennas; Singular value decomposition; Transmitters; Transmitting antennas; Beamforming; Expectation Maximization Algorithm; MIMO; OFDM; SVD; Semi-blind;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Computers and Signal Processing, 2007. PacRim 2007. IEEE Pacific Rim Conference on

Conference_Location

Victoria, BC

Print_ISBN

978-1-4244-1189-4

Type

conf

DOI

10.1109/PACRIM.2007.4313209

Filename

4313209