A Novel Adaptive Semi-blind Beamforming Algorithm for MIMO-OFDM Wireless Communication Systems

Du Jiang; Peng Qi-cong; Zhong Jun

Volume 26 Issue 6

Jun. 2004

Turn off MathJax

Article Contents

Article Navigation > Journal of Electronics & Information Technology > 2004 > 26(6): 989-994

Du Jiang, Peng Qi-cong, Zhong Jun. A Novel Adaptive Semi-blind Beamforming Algorithm for MIMO-OFDM Wireless Communication Systems[J]. Journal of Electronics & Information Technology, 2004, 26(6): 989-994.

Citation:

Du Jiang, Peng Qi-cong, Zhong Jun. A Novel Adaptive Semi-blind Beamforming Algorithm for MIMO-OFDM Wireless Communication Systems[J]. Journal of Electronics & Information Technology, 2004, 26(6): 989-994.

Citation:

PDF( 1281 KB)

A Novel Adaptive Semi-blind Beamforming Algorithm for MIMO-OFDM Wireless Communication Systems

Received Date: 2002-12-15
Rev Recd Date: 2003-09-22
Publish Date: 2004-06-19

Abstract

Abstract

In this paper a novel adaptive semi-blind beamforming algorithm is proposed for OFDM-MIMO systems. First the nonlinear neural networks combined with maximized mutual information rule are used for estimating the coarse weights of beamformer, then the beamforming algorithm adaptively adjusts the vector weights by means of the known pilot tones inserted into the frame structure, thus the channel equalization can be further im-proved. The proposed algorithm is compared to two other channel estimators under various multipath fading environments through simulations and experimental data. The results show that the semi-blind beamforming algorithm has much better overall performance in terms of BER, moreover has high aperture gains with very good directivity in the beamformer pattern.

FullText(HTML)

References(1)

References

Hanzo L,Webb W,Keller T.Single-and Multi-Carrier Quadrature Amplitude Modulation.West Sussex,England.John Willey Sons Ltd,2000:321-345.[2]Tsoulos G V.Smart antennas for mobile communication systems:Benefits and challenges[J].Electronics Communication Engineering Journal.1999,11(2):113-116[3]Haykin S.Adaptive Filter Theory,fourth edition.Englewood Cliffs,New Jersey,USA,Pearson Education Inc.,2002:232-243.[4]Le Minh Tuan,Jaedon Park.A semi-blind LMS adaptive beamforming algorithm for smart antenna in an OFDM system.IEEE Antennas and Propagation International Symposium,San Antonio,Texas,USA,2002,Vol.1:618-621.[5]Bingham J A C.Multicarrier modulation for data transmission:An idea whose time has come[J].IEEE Commun.Mag.1990,28(5):5-14[6]Wu Y,Zou W Y.Orthogonal frequency division multiplexing:a multicarrier modulation scheme[J].IEEE Trans.on Consumer Elect.1995,41(3):392-399[7]Muquet B,de Courville M.Blind and semi-blind channel identification methods using second order statistics for OFDM systems.Proc..ICASSP,Phoenix,Arizona,USA,1999,vol.5:2745-2748.

Relative Articles

Supplements(0)

Cited By

Proportional views