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Hokkaido University Collection of Scholarly and Academic Papers >
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Pseudo Eigenbeam-Space Division Multiplexing (PE-SDM) in Frequency-Selective MIMO Channels
| 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 |
| Publisher DOI: | 10.1093/ietcom/e90-b.11.3197 |
| 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)
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Submitter: 西本 浩
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