Submitted By Riaz ( ) A Wideband MIMO Channel Model Derived From the Geometric Elliptical Scattering Model Space Signal Processing Home Work # 04 Submitted to Professor KyungHi Chang Graduate School of Information Technology and Telecommunications Inha University, South Korea

2 Reference A Wideband MIMO Channel Model Derived From the Geometric Elliptical Scattering Model Patzold, M. Hogstad, B.O. Agder Univ. Coll., Grimstad; Patzold, M.Hogstad, B.O. This paper appears in: Wireless Communication Systems, ISWCS '06. 3rd International Symposium on Publication Date: 6-8 Sept On page(s): ISBN: INSPEC Accession Number: Digital Object Identifier: /ISWCS Current Version Published: Wireless Communication Systems, ISWCS '06. 3rd International Symposium on

3 Objectives To extend the knowledge of channel modeling for wireless wideband communication using MIMO technology

4 Contents Introduction Geometrical Elliptical Scattering Model Derivation of Reference Model Illustrative Examples and Numerical Results Model Extensions Conclusion

5 Introduction Realistic Channel Model is of crucial importance to design and performance evaluation of MIMO wireless systems For Wideband wireless communication systems employing MIMO tech (MIMO-OFDM), channel models are required, which take into account the temporal, spatial and frequency correlation properties In this paper, a space-time-frequency MIMO channel model has been derived from the geometrical elliptical scattering (GES) model Extended work of spatial channel model for SIMO case to MIMO

6 Geometrical Elliptical Scattering (GES) Model All local scatterers associated with a certain path length are located on an ellipse, where BS and MS are located at the focal points Tilt angle of Antenna Array Local Scatterers Antenna Element Spacing Angle of Rx Motion Angle of Departure Angle of arrival **

7 Reference Model: Derivation Complex Channel Gain Describing the Link gainphase shift wave vector spatial translation vector wave number link length number of scatterers Since** The waves emerging from different transmit antennas arrive at a particular scatterer at approximately he same angle. Same to Rx. So, Gains En and phase shifts caused by a particular scatterer are the same for waves arriving from (or traveling to) different transmit (receive) antenna elements

8 Reference Model: Derivation Gain 2 nd, 3 rd phase component Relation bet AOD and AOA (Results of another Research Article)

9 Reference Model: Correlation Functions 3D space-time CCF of the links The temporal ACF

10 Illustrative Examples Von Mises Density Controls the angular spread of AOA If k=0 isotropic scattering Accounts for the mean value of AOA

11 Illustrative Examples

12 Model Extensions: Multiple Clusters of Scatterers Complex Channel Gain weighting factor

13 Model Extensions: frequency Selectivity

14 Model Extensions: frequency Selectivity FCF

15 Conclusion Reference model from GES model Extension to multi-cluster scenarios and frequency selectivity General formula for correlation functions Design, test and analysis of future communication systems using MIMO-OFDM Framework for the design of stochastic and deterministic MIMO channel simulators Thanks for your cooperation Questions/Comments