Title :
Diversity, interference cancellation and spatial multiplexing in MIMO mobile WiMAX systems
Author :
Biglieri, Ezio ; Goldsmith, A. ; Muquet, B. ; Sari, H.
Author_Institution :
Univ. Pompeu Fabra, Barcelona
Abstract :
Multiple input multiple output (MIMO) techniques are an essential part of the IEEE 802.16e-2005 specifications, which form the basis of mobile WiMAX systems. In this paper, we first discuss the tradeoffs between diversity, interference cancellation and spatial multiplexing in MIMO systems, and we compare optimum combining (OC), maximum-ratio combining (MRC) and interference cancellation for different numbers of receive antennas. Then, we focus on the two mandatory MIMO profiles in the IEEE specifications (Alamouti´s STC and the 2x2 spatial multiplexing scheme) and compare them when the first is combined with MRC at the receiver. The analysis obtained using the ITU pedestrian B channel in ideal conditions indicates that the two schemes lead to similar performance when they are operated at the same spectral efficiency
Keywords :
MIMO communication; WiMax; broadband networks; diversity reception; interference suppression; multiplexing; radiofrequency interference; IEEE 802.16e-2005 specification; ITU pedestrian B channel; MIMO; diversity; interference cancellation; mobile WiMAX system; multiple input multiple output system; spatial multiplexing; Base stations; Diversity reception; Interference cancellation; MIMO; Modulation coding; Performance analysis; Physical layer; Receiving antennas; Transmitting antennas; WiMAX;
Conference_Titel :
Mobile WiMAX Symposium, 2007. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
1-4244-0957-8
DOI :
10.1109/WIMAX.2007.348702
