Paper Info
Title
Novel Downlink Beamforming Method Using Selective Stbc With Common Eigenvectors For Mimo-Ofdm Systems
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.
Year
DOI
Venue
2006
10.1093/ietcom/e89-b.8.2170
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
Field
DocType
MIMO, eigenvector, OFDM, achievable spectrum efficiency, STBC, beamforming, maximum Doppler frequency, feedback overhead
MIMO-OFDM,Beamforming,Telecommunications,Computer science,MIMO,Electronic engineering,Spectral efficiency,Multiplexing,Spatial multiplexing,Orthogonal frequency-division multiplexing,Channel state information,Distributed computing
Journal
Volume
Issue
ISSN
E89B
8
0916-8516
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Riichi Kudo18115.69
Yasushi Takatori29224.89
Kentaro Nishimori316531.27
Koichi Tsunekawa411.71