Novel Downlink Beamforming Method Using Selective STBC with Common Eigenvectors for MIMO-OFDM Systems

Riichi KUDO; Yasushi TAKATORI; Kentaro NISHIMORI; Koichi TSUNEKAWA

doi:10.1093/ietcom/e89-b.8.2170

Novel Downlink Beamforming Method Using Selective STBC with Common Eigenvectors for MIMO-OFDM Systems

Riichi KUDO, Yasushi TAKATORI, Kentaro NISHIMORI, Koichi TSUNEKAWA

Full Text Views

0

Share
Cite this

Summary :

To achieve a very high data rate within a limited frequency band in orthogonal frequency division multiplexing (OFDM) systems, multi-input multi-output (MIMO) techniques are very promising. Moreover, if a transmitter has the channel state information (CSI), the achievable spectrum efficiency can be maximized using the eigenbeam-space division multiplexing (E-SDM). However, this scheme demands accurate channel estimation. Therefore, in a closed-loop transmission scheme, an increase in the amount of feedback is absolutely necessary for the E-SDM. This paper describes a downlink beamforming method that significantly reduces the amount of feedback needed by using the common transmission weight vectors in all sub-carriers, compared to the amount required for E-SDM. The proposed method also applies transmission diversity to compensate for the quality. The effectiveness of the proposed method was confirmed using computer simulations in both Ricean and Rayleigh fading environments.

Publication: IEICE TRANSACTIONS on Communications Vol.E89-B No.8 pp.2170-2179

Publication Date: 2006/08/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e89-b.8.2170

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Cite this

Copy

Riichi KUDO, Yasushi TAKATORI, Kentaro NISHIMORI, Koichi TSUNEKAWA, "Novel Downlink Beamforming Method Using Selective STBC with Common Eigenvectors for MIMO-OFDM Systems" in IEICE TRANSACTIONS on Communications, vol. E89-B, no. 8, pp. 2170-2179, August 2006, doi: 10.1093/ietcom/e89-b.8.2170.
Abstract: To achieve a very high data rate within a limited frequency band in orthogonal frequency division multiplexing (OFDM) systems, multi-input multi-output (MIMO) techniques are very promising. Moreover, if a transmitter has the channel state information (CSI), the achievable spectrum efficiency can be maximized using the eigenbeam-space division multiplexing (E-SDM). However, this scheme demands accurate channel estimation. Therefore, in a closed-loop transmission scheme, an increase in the amount of feedback is absolutely necessary for the E-SDM. This paper describes a downlink beamforming method that significantly reduces the amount of feedback needed by using the common transmission weight vectors in all sub-carriers, compared to the amount required for E-SDM. The proposed method also applies transmission diversity to compensate for the quality. The effectiveness of the proposed method was confirmed using computer simulations in both Ricean and Rayleigh fading environments.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e89-b.8.2170/_p

Copy

@ARTICLE{e89-b_8_2170,
author={Riichi KUDO, Yasushi TAKATORI, Kentaro NISHIMORI, Koichi TSUNEKAWA, },
journal={IEICE TRANSACTIONS on Communications},
title={Novel Downlink Beamforming Method Using Selective STBC with Common Eigenvectors for MIMO-OFDM Systems},
year={2006},
volume={E89-B},
number={8},
pages={2170-2179},
abstract={To achieve a very high data rate within a limited frequency band in orthogonal frequency division multiplexing (OFDM) systems, multi-input multi-output (MIMO) techniques are very promising. Moreover, if a transmitter has the channel state information (CSI), the achievable spectrum efficiency can be maximized using the eigenbeam-space division multiplexing (E-SDM). However, this scheme demands accurate channel estimation. Therefore, in a closed-loop transmission scheme, an increase in the amount of feedback is absolutely necessary for the E-SDM. This paper describes a downlink beamforming method that significantly reduces the amount of feedback needed by using the common transmission weight vectors in all sub-carriers, compared to the amount required for E-SDM. The proposed method also applies transmission diversity to compensate for the quality. The effectiveness of the proposed method was confirmed using computer simulations in both Ricean and Rayleigh fading environments.},
keywords={},
doi={10.1093/ietcom/e89-b.8.2170},
ISSN={1745-1345},
month={August},}

Copy

TY - JOUR
TI - Novel Downlink Beamforming Method Using Selective STBC with Common Eigenvectors for MIMO-OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 2170
EP - 2179
AU - Riichi KUDO
AU - Yasushi TAKATORI
AU - Kentaro NISHIMORI
AU - Koichi TSUNEKAWA
PY - 2006
DO - 10.1093/ietcom/e89-b.8.2170
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E89-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2006
AB - To achieve a very high data rate within a limited frequency band in orthogonal frequency division multiplexing (OFDM) systems, multi-input multi-output (MIMO) techniques are very promising. Moreover, if a transmitter has the channel state information (CSI), the achievable spectrum efficiency can be maximized using the eigenbeam-space division multiplexing (E-SDM). However, this scheme demands accurate channel estimation. Therefore, in a closed-loop transmission scheme, an increase in the amount of feedback is absolutely necessary for the E-SDM. This paper describes a downlink beamforming method that significantly reduces the amount of feedback needed by using the common transmission weight vectors in all sub-carriers, compared to the amount required for E-SDM. The proposed method also applies transmission diversity to compensate for the quality. The effectiveness of the proposed method was confirmed using computer simulations in both Ricean and Rayleigh fading environments.
ER -