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Pseudo Eigenbeam-Space Division Multiplexing (PE-SDM) in Frequency-Selective MIMO Channels

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/42654

Title: Pseudo Eigenbeam-Space Division Multiplexing (PE-SDM) in Frequency-Selective MIMO Channels
Authors: Nishimoto, Hiroshi Browse this author
Nishimura, Toshihiko Browse this author →KAKEN DB
Ohgane, Takeo Browse this author →KAKEN DB
Ogawa, Yasutaka Browse this author →KAKEN DB
Keywords: MIMO system
frequency-selective fading
transmit beamforming
effective channel
frequency continuity
singular value decomposition (SVD)
pseudo eigenvector
pseudo eigenbeam-space division multiplexing (PE-SDM)
channel estimation
Issue Date: 1-Nov-2007
Publisher: The Institute of Electronics, Information and Communication Engineers
Journal Title: IEICE Transactions on Communications
Volume: E90-B
Issue: 11
Start Page: 3197
End Page: 3207
Abstract: In a frequency-selective multiple-input multiple-output (MIMO) channel, the optimum transmission is achieved by beamforming with eigenvectors obtained at each discrete frequency point, i.e., an extension of eigenbeam-space division multiplexing (E-SDM). However, the calculation load of eigenvalue decomposition at the transmitter increases in proportion to the number of frequency points. In addition, frequency-independent eigenvectors increase the delay spread of the effective channel observed at the receiver. In this paper, we propose a pseudo eigenvector scheme for the purpose of mitigating the calculation load and maintaining frequency continuity (or decreasing the delay spread). First, we demonstrate that pseudo eigenvectors reduce the delay spread of the effective channels with low computational complexity. Next, the practical performance of the pseudo E-SDM (PE-SDM) transmission is evaluated. The simulation results show that PE-SDM provides almost the same or better performance compared with E-SDM when the receiver employs a time-windowing-based channel estimation available in the low delay spread cases.
Rights: copyright©2007 IEICE
Relation: http://search.ieice.org/
Type: article
URI: http://hdl.handle.net/2115/42654
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 西本 浩

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