Paper Info
Title
Transmission Rate By User Antenna Selection For Block Diagonalization Based Multiuser Mimo System
Abstract
Multi-user MIMO (MU-MIMO) improves the system channel capacity by employing the transmission between a base station and multiple user terminals (UTs). Block Diagonalization (BD) has been proposed in order to realize MU-MIMO broadcast transmission. The BD algorithm cancels inter-user interference by creating the weights so that the channel matrixes for the other users are set to be zero matrixes. However, when the number of transmit antennas is equals to the total number of received antennas, the transmission rate by the BD algorithm is decreased. This paper proposes a new antenna selection method at the UTs to reduce the number of nulls for the other users except an intended user by the BD algorithm. It is verified via bit error rate (BER) evaluation that the proposed method is effective compared to the conventional BD algorithm, especially, when the number of users is increased with a low bit rate. Moreover, this paper evaluates the transmission rate based on IEEE802.11ac standard when considering BD algorithm with ideal user scheduling. Although the number of equivalent receive antenna is only one by the proposed method when the number of antennas at the the UT is two, it is shown that the transmission rate by the proposed method is higher than that by the conventional BD algorithm when the SNR is low even in the condition on user scheduling.
Year
DOI
Venue
2014
10.1587/transcom.E97.B.2118
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
Field
DocType
multiuser MIMO, block diagonalization, user antenna selection, IEEE802.11ac, eigenvalue
SemEval,Computer science,Parallel corpora,Speech recognition,Artificial intelligence,Natural language processing,Word-sense disambiguation
Journal
Volume
Issue
ISSN
E97B
10
1745-1345
Citations 
PageRank 
References 
3
0.40
10
Authors
3
Name
Order
Citations
PageRank
Kentaro Nishimori116531.27
Takefumi Hiraguri24915.58
Hideo Makino35411.53