Characterization of an Indoor MIMO Channel in Frequency Domain using the 3D-SAGE Algorithm

Michail Matthaiou, David I. Laurenson, Nima Razavi-Ghods, Sana Salous

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this paper, the frequency domain (FD) SAGE (Space-Alternating Generalized Expectation-maximization) algorithm has been extended to the MIMO case in order to determine the angular and temporal channel characteristics at both ends of the radio link. The implementation of the SAGE algorithm relies on the serial interference cancellation (SIC) technique which outperforms the conventional parallel interference cancellation (PIC) scheme when used in the frequency domain, especially in the common case of unequal power levels. The main purpose of our investigation has been twofold. Firstly, a synthetic environment was generated to testify the efficiency of the proposed algorithm in a severe multipath indoor scenario. Secondly, a measurement campaign was conducted and the obtained data were postprocessed in order to assess the whole double-directional domain. The results revealed that the proposed algorithm demonstrates a stable performance and robustness as well as rapid convergence which are the principal criteria an estimation technique must fulfill.
Original languageEnglish
Title of host publicationIEEE International Conference on Communications 2007 (ICC2007)
Publication statusPublished - 1 Jun 2007


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