A MUI Deduction Pulse Shape Design Scheme for UWB Communications

1. A MUI Deduction Pulse Shape Design Scheme for UWB Communications Weihua Gao, Student Member, IEEE Lisa Ann Osadciw, Senior Member, IEEE DreamsNet Lab Syracuse University

2. Outline UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

3. UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

4. UWB Technology Introduction

5. UWB Technology Introduction Compared to narrowband RF and spread spectrum, UWB uses extremely wide bandwidth, if the emission power is not well controlled, UWB devices might cause interference with other existing systems.

6. UWB Technology Introduction On February 14, 2002, the FCC issued a first report and order that permitted UWB devices to operate using spectrum occupied by existing radio services as long as emission restrictions, in the form of a spectral mask are met. 3.1-10.6 GHz, 7.5GHz Bandwidth -41.3 dBm/MHz PSD

7. UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

8. Where are we talking about in a system point of view�

9. Different pulse shapes chosen for UWB systems

10. UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

11.  UWB System Model  We use TH-BPSK and TH-PPM systems consisting of Nu active users to evaluate the performance of different pulse shapes.

12.  Gaussian derivatives and PSD  Gaussian derivative provide excellent radiation properties As the order of the derivative increases, the energy is moving to higher frequencies Higher order Gaussian derivative do not need frequency shift to fit the FCC mask, but not in a power efficient manner

13. UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

14.  Method description Change the amplitude of every single waveform of Gaussian first 16 derivatives in a regular step from 0 to M (M is a real number) to make the pulse�s PSD conforms to the mask, while transmitting as much energy as possible Use these 16 derivative pulses as base waveforms Search and compare all the possible combinations of any 2 (3, or even more) of the 16 derivatives, during each searching and comparing loop, keep changing those coefficients in a certain range and record a number of pulses which not only offer efficiency in meeting the FCC mask, but also effectively exploit the allowable bandwidth and power, these pulses will be kept in the candidates pool for further selection Choose from the pulse candidates pool according to the MUI reduction requirement and get the best result

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16. UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

17. Numerical Results

18. UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

19. Simulation Platform

20. Performance Comparison (I)

21. Performance Comparison (II)

22. UWB Technology Introduction Literature Review UWB System Model and Gaussian Derivative Pulses Design Method Description Numerical Results Performance Comparison Conclusion

23. Conclusion

24. Thanks Questions ?