Abstract
The large system analysis of randomly spread MIMO DS-CDMA systems is provided. Correlated Rayleigh fading MIMO channels are assumed for all users. Linear multiuser detection with separate decoding and pilot-aided channel estimation are used. The results imply that with channel estimation, the performance can improve significantly as the correlation between the transmit antennas increases. No channel information at the transmitter is required, but the channel estimator needs knowlegde of the long term transmit correlation in advance. The numerical results demonstrate that in a 4 × 4 MIMO DS-CDMA system with two users per chip, high antenna correlation at the transmitter can double the ergodic spectral efficiency compared to the case of uncorrelated transmit antennas.
| Original language | English |
|---|---|
| Title of host publication | 2010 IEEE International Symposium on Information Theory |
| Publisher | IEEE Institute of Electrical and Electronic Engineers |
| Pages | 2098-2102 |
| ISBN (Electronic) | 978-1-4244-7891-0, 978-1-4244-7892-7 |
| ISBN (Print) | 978-1-4244-7890-3 |
| DOIs | |
| Publication status | Published - 23 Aug 2010 |
| MoE publication type | A4 Article in a conference publication |
| Event | 2010 IEEE International Symposium on Information Theory, ISIT 2010 - Austin, TX, United States Duration: 13 Jun 2010 → 18 Jun 2010 |
Publication series
| Series | IEEE International Symposium on Information Theory. Proceedings |
|---|---|
| Volume | 2010 |
| ISSN | 2157-8095 |
Conference
| Conference | 2010 IEEE International Symposium on Information Theory, ISIT 2010 |
|---|---|
| Country | United States |
| City | Austin, TX |
| Period | 13/06/10 → 18/06/10 |
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Analysis of large MIMO DS-CDMA systems with imperfect CSI and spatial correlation. / Vehkapera, Mikko; Takeuchi, Keigo; Müller, Ralf R.; Tanaka, Toshiyuki.
2010 IEEE International Symposium on Information Theory. IEEE Institute of Electrical and Electronic Engineers , 2010. p. 2098-2102 5513401 (IEEE International Symposium on Information Theory. Proceedings, Vol. 2010).Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
TY - GEN
T1 - Analysis of large MIMO DS-CDMA systems with imperfect CSI and spatial correlation
AU - Vehkapera, Mikko
AU - Takeuchi, Keigo
AU - Müller, Ralf R.
AU - Tanaka, Toshiyuki
PY - 2010/8/23
Y1 - 2010/8/23
N2 - The large system analysis of randomly spread MIMO DS-CDMA systems is provided. Correlated Rayleigh fading MIMO channels are assumed for all users. Linear multiuser detection with separate decoding and pilot-aided channel estimation are used. The results imply that with channel estimation, the performance can improve significantly as the correlation between the transmit antennas increases. No channel information at the transmitter is required, but the channel estimator needs knowlegde of the long term transmit correlation in advance. The numerical results demonstrate that in a 4 × 4 MIMO DS-CDMA system with two users per chip, high antenna correlation at the transmitter can double the ergodic spectral efficiency compared to the case of uncorrelated transmit antennas.
AB - The large system analysis of randomly spread MIMO DS-CDMA systems is provided. Correlated Rayleigh fading MIMO channels are assumed for all users. Linear multiuser detection with separate decoding and pilot-aided channel estimation are used. The results imply that with channel estimation, the performance can improve significantly as the correlation between the transmit antennas increases. No channel information at the transmitter is required, but the channel estimator needs knowlegde of the long term transmit correlation in advance. The numerical results demonstrate that in a 4 × 4 MIMO DS-CDMA system with two users per chip, high antenna correlation at the transmitter can double the ergodic spectral efficiency compared to the case of uncorrelated transmit antennas.
UR - http://www.scopus.com/inward/record.url?scp=77955705850&partnerID=8YFLogxK
U2 - 10.1109/ISIT.2010.5513401
DO - 10.1109/ISIT.2010.5513401
M3 - Conference article in proceedings
AN - SCOPUS:77955705850
SN - 978-1-4244-7890-3
T3 - IEEE International Symposium on Information Theory. Proceedings
SP - 2098
EP - 2102
BT - 2010 IEEE International Symposium on Information Theory
PB - IEEE Institute of Electrical and Electronic Engineers
ER -