Referenced Items are not available for this document.
This paper describes the design of a time-division duplexing frame with a variety of pilots for multiuser multiple-input-multiple-output orthogonal frequency-division multiple access (MU-MIMO OFDMA) systems, where the base station and users are equipped with four and two transmitting and receiving antennas, respectively. In addition, a simplified scheduling algorithm for the MU-MIMO OFDMA is proposed, and its computational complexity is analyzed. The proposed scheduling algorithm shows comparable sum achievable rates to the optimal MU-MIMO OFDMA scheduling that searches for user pairs in an exhaustive manner, whereas its complexity is fairly reduced. Furthermore, to verify the performance of MU-MIMO OFDMA systems that employ the proposed frame structure and scheduling algorithm, a system-level comparison of the average cell throughputs between the proposed MU-MIMO and the conventional MIMO OFDMA systems is numerically performed in a practical cellular environment. As a result, vital information on how we can apply MU-MIMO OFDMA schemes in cellular environments is provided.
Published in:
Vehicular Technology, IEEE Transactions on
(Volume:60
,
Issue:
7
)
Date of Publication: Sept. 2011
- Page(s):
- 3127 - 3141
- ISSN :
- 0018-9545
- INSPEC Accession Number:
- 12219113
- Digital Object Identifier :
- 10.1109/TVT.2011.2160377
- Product Type:
- Journals & Magazines
- Date of Publication :
- 23 June 2011
- Date of Current Version :
- 12 September 2011
- Issue Date :
- Sept. 2011
- Sponsored by :
- IEEE Vehicular Technology Society
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