TY - GEN
T1 - A simple method of transmitting stream adaptation for fixed-matrix-size precoding on MU-MIMO transmission
AU - Hou, Yafei
AU - Sonobe, Satoshi
AU - Yano, Kazuto
AU - Uno, Masahiro
AU - Kobayashi, Kiyoshi
PY - 2012/8/1
Y1 - 2012/8/1
N2 - During the operation of multiuser multiple-input-multiple output (MU-MIMO) algorithms, some antennas of BS or UEs may neither transmit nor receive signals due to the long distance or unexpected damages. Therefore, the BS cannot obtain the channel state information (CSI) from/to these antennas. Without these CSI, the performance of algorithm is degraded. We call this effect as 'broken antenna effect (BAE)'. To cope with this issue, this paper proposes a process to regularize the channel matrix by replacing the missing CSI with zero(s) and setting nonzero values to diagonal elements. Then, it is confirmed through computer simulation that the proposed method can adjust the number of transmitting parallel streams according to the number of 'broken' antennas, and provide MU-MIMO transmission with maximum diversity order without any change of the precoding process.
AB - During the operation of multiuser multiple-input-multiple output (MU-MIMO) algorithms, some antennas of BS or UEs may neither transmit nor receive signals due to the long distance or unexpected damages. Therefore, the BS cannot obtain the channel state information (CSI) from/to these antennas. Without these CSI, the performance of algorithm is degraded. We call this effect as 'broken antenna effect (BAE)'. To cope with this issue, this paper proposes a process to regularize the channel matrix by replacing the missing CSI with zero(s) and setting nonzero values to diagonal elements. Then, it is confirmed through computer simulation that the proposed method can adjust the number of transmitting parallel streams according to the number of 'broken' antennas, and provide MU-MIMO transmission with maximum diversity order without any change of the precoding process.
UR - http://www.scopus.com/inward/record.url?scp=84864326313&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84864326313&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2012.6213993
DO - 10.1109/WCNC.2012.6213993
M3 - Conference contribution
AN - SCOPUS:84864326313
SN - 9781467304375
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 136
EP - 141
BT - 2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
T2 - 2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
Y2 - 1 April 2012 through 4 April 2012
ER -