2006年8月
Novel downlink beamforming method using selective STBC with common eigenvectors for MIMO-OFDM systems
IEICE TRANSACTIONS ON COMMUNICATIONS
- ,
- ,
- ,
- 巻
- E89B
- 号
- 8
- 開始ページ
- 2170
- 終了ページ
- 2179
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/ietcom/e89-b.8.2170
- 出版者・発行元
- IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
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.
- リンク情報
- ID情報
-
- DOI : 10.1093/ietcom/e89-b.8.2170
- ISSN : 0916-8516
- eISSN : 1745-1345
- Web of Science ID : WOS:000239577900006