Title :
On downlink power control and capacity with multi-antenna transmission
Author :
Heikkinen, Tiina ; Hottinen, Ari
Author_Institution :
Nokia Res. Center, Espoo, Finland
Abstract :
We study the multi-antenna downlink channel in a CDMA wireless network. We introduce optimum power allocation to the proposed channel where the users can control the power of multiple transmit antennas. The model and the resulting power allocation algorithms are used to analyze macrodiversity in the CDMA downlink with various antenna selection and combination concepts. We show that with multiple downlink antennas the multi-user system can be modeled with rectangular non-negative matrices. Furthermore, we quantify the achievable gains for the proposed joint multi-antenna power control concept with Monte-Carlo simulations
Keywords :
Monte Carlo methods; channel capacity; code division multiple access; diversity reception; land mobile radio; matrix algebra; power control; radio links; telecommunication control; transmitting antennas; Monte-Carlo simulations; antenna combination; antenna selection; downlink channel capacity; downlink power control; macrodiversity; multi-antenna power control; multi-antenna transmission; multi-user system; multiple transmit antennas; power allocation algorithms; rectangular nonnegative matrices; third generation wireless system; Algorithm design and analysis; Base stations; Downlink; Mathematical model; Multiaccess communication; Power control; Power generation; Power system modeling; Transmitting antennas; Wireless networks;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686619
