| Analysis on the Impact of Multiple-Antenna Transmit Schemes on Multiuser Diversity |
|
Myoung-Won Lee1, Cheol Mun2, Jong-Gwan Yook1 |
1Department of Electrical and Electronic Engineering, Yonsei University
2Department of Electronic Communication Engineering, Chungju National University |
|
|
|
|
| Abstract |
|
In this paper, the performance of a multiuser diversity system combined with a multi-element transmit antenna system is analyzed under the assumption of independent Rayleigh fading. A measure of system .level performance is an average channel capacity as a function of the number of users and antennas. Average channel capacity is obtained from the instantaneous signal-to-noise ratio(SNR) distribution combined by both transmit diversity(TD) at each link and multiuser diversity at system level. Numerical results show that closed-loop antenna techniques provide an additional gain with multiuser diversity system due to array gain, even though space diversity gain reduces multiuser diversity gain. On the other hand, the space-time block coding(STBC) that provides full order space diversity gain only has a destructive influence on multiuser diversity. |
| Key words:
Spatial Diversity, Multiuser Diversity, Channel Capacity, Transmit Diversity |
|
PDF Links
Full text via DOI
Download Citation
