1. Telecommunication Engineering Research Lab, Inha University Winner-Hopf Interpolation Aided Kalman Filter-Based Channel Estimation for MB-OFDM UWB Systems in Time Varying Dispersive Fading Channel S. M. Riazul Islam and Kyung Sup Kwak Inha University, Korea ICACT-2010

2. Telecommunication Engineering Research Lab, Inha University Contents Introduction System Model Channel Estimation –Channel Model –Interpolation using Winner-Hopf filtration –Kalman Filtering and ICI Suppression Simulation and Results Conclusion ICACT-2010

3. Telecommunication Engineering Research Lab, Inha University Introduction MB-OFDM is considered to be the pioneer implementation approach for UWB technology MB approach optimizes the use of UWB spectrum allocation In 2008, ECMA International has already published standard ECMA- 368 for high rate ultra wideband PHY and MAC specifications The radio channel in mobile radio systems are usually multipath fading channels, which are causing intersymbol interference (ISI) in the received signal. In this paper, we are going to propose a new channel estimation technique suitable for MB-OFDM system ICACT-2010

4. Telecommunication Engineering Research Lab, Inha University System Model ICACT-2010

5. Telecommunication Engineering Research Lab, Inha University System Model-2 RF Signal Tx Time Varying Channel Symbol Rx ICACT-2010

6. Telecommunication Engineering Research Lab, Inha University Channel Estimation Channel Model WH Interpolation AR Process ICACT-2010

7. Telecommunication Engineering Research Lab, Inha University Channel Estimation-2 Initial Conditions Kalman Gain Current Est. Predicted Est. O/P ICACT-2010

8. Telecommunication Engineering Research Lab, Inha University Simulation Result ICACT-2010

9. Telecommunication Engineering Research Lab, Inha University Simulation Result-2 ICACT-2010

10. Telecommunication Engineering Research Lab, Inha University Conclusion Interpolation of higher order derivatives provides a pre-stage tracking of dispersive fading channel And then the joint work of channel estimation and ICI suppression filter can successfully estimate the channel along with ICI elimination Since this estimator can track the time varying nature of multipath channel, it can support mobility of high rate UWB nodes. The estimation technique in this study can be efficiently used to estimate the channel in MB-OFDM UWB systems. Thanks for Your cooperation Questions/Comments ICACT-2010