Title :
Performance of Downlink Spatial-Multiplexing in Urban Macrocellular Multi-User MIMO Scenarios
Author :
Fügen, Thomas ; Porebska, Malgorzata ; Wiesbeck, Werner
Author_Institution :
Institut fur Hochstfrequenztechnik und Elektronik, Karlsruhe Univ.
Abstract :
The aim of this paper is to compare the performance of different smart antenna algorithms to the performance of a conventional SISO reference system in an urban multi-user MIMO scenario. A single cell with three 120 deg sectors and several moving users is used for evaluation. The scenario as well as the channel information is generated by means of a realistic urban channel model that consists of a model of the city of Karlsruhe, a mobility model and an accurate ray-tracing based wave propagation model. The smart antenna algorithms under test are two single-user MIMO algorithms (user specific beamforming, waterfilling) and two multi-user MIMO algorithms (block diagonalization, successive optimization). Simulation results show clearly the potential of downlink spatial-multiplexing to improve the system capacity, to reduce the exposure, the transmit power and therefore also the operating costs in future cellular mobile radio systems
Keywords :
MIMO systems; cellular radio; multi-access systems; multiplexing; radio links; ray tracing; wave propagation; block diagonalization; cellular mobile radio systems; channel information; downlink spatial-multiplexing; ray-tracing model; smart antenna algorithms; successive optimization; system capacity; urban macrocellular multiuser MIMO scenarios; waterfilling algorithms; wave propagation model; Antennas and propagation; Array signal processing; Cities and towns; Costs; Downlink; Land mobile radio; MIMO; Power system modeling; Ray tracing; Testing;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.254315
