Abstract
In this paper we propose the multi-user MIMO (MU-MIMO) with the fixed relay station (RS) transmissions scheme where the base station (BS) and the fixed RS are equipped with multiple antennas and the multiple users are equipped with a single antenna. Since the MU-MIMO can improve the sum capacity significantly by transmitting the data streams to multiple users simultaneously without much link gain while the fixed relay station can improve the link gain but loses the spectral efficiency due to the half-duplex transmission, our proposed scheme can compensate each of the drawbacks and can improve both the sum rate and the link gain. We adopt the practical random unitary beamforming (RUB) precoding method for MU-MIMO and the simple amplify-and-forward protocol for the operation of the relay station. Based on our proposed RUB based MU-MIMO with fixed RS, the sumcapacity is upper bounded by the channels between the BS and the RS, not by the channels between the RS and the users. We also show from our extensive simulations that our proposed scheme has lower complexity compartively and provides the performance commensurate with the schemes presented in the literature in terms of the sum-rate for the large user scenario.
| Original language | English |
|---|---|
| Title of host publication | Proceedings - 2009 1st International Conference on Advances in Satellite and Space Communications, SPACOMM 2009 |
| Pages | 69-73 |
| Number of pages | 5 |
| DOIs | |
| Publication status | Published - 2009 Nov 16 |
| Event | 2009 1st International Conference on Advances in Satellite and Space Communications, SPACOMM 2009 - Colmar, France Duration: 2009 Jul 20 → 2009 Jul 25 |
Other
| Other | 2009 1st International Conference on Advances in Satellite and Space Communications, SPACOMM 2009 |
|---|---|
| Country | France |
| City | Colmar |
| Period | 09/7/20 → 09/7/25 |
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Keywords
- And relay stations
- Muti-user MIMO
- Random unitary beamforming
ASJC Scopus subject areas
- Computer Networks and Communications
- Signal Processing
- Electrical and Electronic Engineering
Cite this
Two-hop MIMO relaying systems using random unitary beamforming in Gaussian broadcast channels. / Kim, Do Hoon; Lee, Jin H.; Ko, Young-Chai.
Proceedings - 2009 1st International Conference on Advances in Satellite and Space Communications, SPACOMM 2009. 2009. p. 69-73 5194588.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Two-hop MIMO relaying systems using random unitary beamforming in Gaussian broadcast channels
AU - Kim, Do Hoon
AU - Lee, Jin H.
AU - Ko, Young-Chai
PY - 2009/11/16
Y1 - 2009/11/16
N2 - In this paper we propose the multi-user MIMO (MU-MIMO) with the fixed relay station (RS) transmissions scheme where the base station (BS) and the fixed RS are equipped with multiple antennas and the multiple users are equipped with a single antenna. Since the MU-MIMO can improve the sum capacity significantly by transmitting the data streams to multiple users simultaneously without much link gain while the fixed relay station can improve the link gain but loses the spectral efficiency due to the half-duplex transmission, our proposed scheme can compensate each of the drawbacks and can improve both the sum rate and the link gain. We adopt the practical random unitary beamforming (RUB) precoding method for MU-MIMO and the simple amplify-and-forward protocol for the operation of the relay station. Based on our proposed RUB based MU-MIMO with fixed RS, the sumcapacity is upper bounded by the channels between the BS and the RS, not by the channels between the RS and the users. We also show from our extensive simulations that our proposed scheme has lower complexity compartively and provides the performance commensurate with the schemes presented in the literature in terms of the sum-rate for the large user scenario.
AB - In this paper we propose the multi-user MIMO (MU-MIMO) with the fixed relay station (RS) transmissions scheme where the base station (BS) and the fixed RS are equipped with multiple antennas and the multiple users are equipped with a single antenna. Since the MU-MIMO can improve the sum capacity significantly by transmitting the data streams to multiple users simultaneously without much link gain while the fixed relay station can improve the link gain but loses the spectral efficiency due to the half-duplex transmission, our proposed scheme can compensate each of the drawbacks and can improve both the sum rate and the link gain. We adopt the practical random unitary beamforming (RUB) precoding method for MU-MIMO and the simple amplify-and-forward protocol for the operation of the relay station. Based on our proposed RUB based MU-MIMO with fixed RS, the sumcapacity is upper bounded by the channels between the BS and the RS, not by the channels between the RS and the users. We also show from our extensive simulations that our proposed scheme has lower complexity compartively and provides the performance commensurate with the schemes presented in the literature in terms of the sum-rate for the large user scenario.
KW - And relay stations
KW - Muti-user MIMO
KW - Random unitary beamforming
UR - http://www.scopus.com/inward/record.url?scp=71049148510&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=71049148510&partnerID=8YFLogxK
U2 - 10.1109/SPACOMM.2009.42
DO - 10.1109/SPACOMM.2009.42
M3 - Conference contribution
AN - SCOPUS:71049148510
SN - 9780769536941
SP - 69
EP - 73
BT - Proceedings - 2009 1st International Conference on Advances in Satellite and Space Communications, SPACOMM 2009
ER -