Abstract
Random unitary beamforming is one of the schemes that can reduce the amount of feedback information in multiuser diversity techniques with multiple-antenna downlink transmission. In Multiple-Input Multiple-Output (MIMO) systems, throughput performance is greatly improved using AMC (Adaptive Modulation and Coding). Throughput performance is also improved by allocating power among streams appropriately. In random unitary beamforming, the transmitter has only partial channel state information (CSI) of each receiver. Thus, it is difficult for random unitary beamforming to use conventional power allocation methods that assumes that all receivers has full CSI. In this paper, we propose a new scheduling algorithm with power allocation for downlink random unitary beamforming that improves throughput performance without full CSI. We provide numerical results of the proposed scheduling algorithm and compare them to those of the conventional random unitary beamforming scheduling algorithm. We show that random unitary beamforming achieves the best system throughput performance with two transmit antennas. We also show that the proposed algorithm attains higher throughput with the small increase of feedback than the random unitary beamforming scheduling algorithm.
| Original language | English |
|---|---|
| Pages (from-to) | 232-238 |
| Number of pages | 7 |
| Journal | IEICE Transactions on Communications |
| Volume | E91-B |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2008 |
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Keywords
- AMC
- MIMO
- Power allocation
- Random beamforming
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Networks and Communications
- Software
Cite this
Scheduling algorithm with power allocation for random unitary beamforming. / Tsuchiya, Yuki; Ohtsuki, Tomoaki; Kaneko, Toshinobu.
In: IEICE Transactions on Communications, Vol. E91-B, No. 1, 2008, p. 232-238.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Scheduling algorithm with power allocation for random unitary beamforming
AU - Tsuchiya, Yuki
AU - Ohtsuki, Tomoaki
AU - Kaneko, Toshinobu
PY - 2008
Y1 - 2008
N2 - Random unitary beamforming is one of the schemes that can reduce the amount of feedback information in multiuser diversity techniques with multiple-antenna downlink transmission. In Multiple-Input Multiple-Output (MIMO) systems, throughput performance is greatly improved using AMC (Adaptive Modulation and Coding). Throughput performance is also improved by allocating power among streams appropriately. In random unitary beamforming, the transmitter has only partial channel state information (CSI) of each receiver. Thus, it is difficult for random unitary beamforming to use conventional power allocation methods that assumes that all receivers has full CSI. In this paper, we propose a new scheduling algorithm with power allocation for downlink random unitary beamforming that improves throughput performance without full CSI. We provide numerical results of the proposed scheduling algorithm and compare them to those of the conventional random unitary beamforming scheduling algorithm. We show that random unitary beamforming achieves the best system throughput performance with two transmit antennas. We also show that the proposed algorithm attains higher throughput with the small increase of feedback than the random unitary beamforming scheduling algorithm.
AB - Random unitary beamforming is one of the schemes that can reduce the amount of feedback information in multiuser diversity techniques with multiple-antenna downlink transmission. In Multiple-Input Multiple-Output (MIMO) systems, throughput performance is greatly improved using AMC (Adaptive Modulation and Coding). Throughput performance is also improved by allocating power among streams appropriately. In random unitary beamforming, the transmitter has only partial channel state information (CSI) of each receiver. Thus, it is difficult for random unitary beamforming to use conventional power allocation methods that assumes that all receivers has full CSI. In this paper, we propose a new scheduling algorithm with power allocation for downlink random unitary beamforming that improves throughput performance without full CSI. We provide numerical results of the proposed scheduling algorithm and compare them to those of the conventional random unitary beamforming scheduling algorithm. We show that random unitary beamforming achieves the best system throughput performance with two transmit antennas. We also show that the proposed algorithm attains higher throughput with the small increase of feedback than the random unitary beamforming scheduling algorithm.
KW - AMC
KW - MIMO
KW - Power allocation
KW - Random beamforming
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U2 - 10.1093/ietcom/e91-b.1.232
DO - 10.1093/ietcom/e91-b.1.232
M3 - Article
AN - SCOPUS:67651008823
VL - E91-B
SP - 232
EP - 238
JO - IEICE Transactions on Communications
JF - IEICE Transactions on Communications
SN - 0916-8516
IS - 1
ER -