An IR UWB Research and Development Platform for a

Transcription

1 An IR UWB Research and Development Platform for a Michael Fischer Ayse Adalan th UWB Forum on Sensing and Communication Vienna University of Technology INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK

2 Outline Background Platform Overview Transmitter Components Validation Measurements Conclusion and Outlook 2 / 19

3 Background [1] IEEE a, Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (WPANs): Alternate PHYs, IEEE, Park Avenue, NJ, 2007 Platform based on architecture presented in [2] M. Fischer, A. Adalan, A.L. Scholtz, Ch. Mecklenbräuker; Architecture of a Modular IEEE a Ultra-Wideband Transmitter; Informationstagung Mikroelektronik 08, Wien; ; Österreichischer Verband für Elektrotechnik, Nr. 50 (2008); pp / 19

4 Background IEEE a IEEE a utilizing different frequency bands Different modulation schemes and bitrates inside frame Common parameters: pulse repetition frequency (PRF) = 499,2 MSymbols/s pulse / chip duration T C = 2 ns ternary symbols { 1, 0, +1} 4 / 19

5 System Overview CPU 10 MHz Rx 124,8 MHz 3993,6 MHz FPGA MGT MGT + 5 / 19

6 Baseband Signal Generation (1) Xilinx Virtex II Pro Output via two MGTs (RocketIO) [3] T. Buchgraber, Experimental Evaluation of the IEEE a Standard, Diploma Thesis, Graz University of Technology, 2008 Power combiner with baluns 7 / 19

7 Baseband Signal Generation (2) 8 / 19

8 Baseband Signal Generation (3) 9 / 19

9 Pulse Shaping Ensure compliance with constraints in time and frequency domain Take into account all components of the transmitter Channel dependant bandwidth [4] A. Adalan, M. Fischer, A.L. Scholtz, Ch. Mecklenbräuker; UWB Transmit Signal Generation for Efficient Spectral Mask Utilisation in IEEE a; 3 rd IEEE UWB Forum on Sensing and Communications, (2008), 24p 10 / 19

10 Upconversion Triple balanced passive mixer Integrated baluns LO: +10 dbm RF: 1000 MHz to 5000 MHz 11 / 19

11 Output Filter Suppress higher mixing products Ensure spectral compliance Monolithic or microstrip solution Possible combination with antenna 12 / 19

12 Antennas Different Vivaldi antennas and bow-tie antennas in use [5] J. Shin, D. Schaubert; A Parameter Study of Stripline-Fed Vivaldi Notch-Antenna Arrays; IEEE Transactions on Antennas and Propagation, Vol. 47, No. 5, pp , May 1999 [6] W. Sörgel, C. Waldschmidt, W. Wiesbeck, Transient Responses of a Vivaldi Antenna and a Logarithmic Periodic Dipole Array for Ultra Wideband Communication, IEEE Antennas and Propagation Society International Symposium, Vol. 3, pp , Columbus, Ohio, June 2003 [7] W. Sörgel, C. Waldschmidt, W. Wiesbeck, An Ultra Wideband Aperture Coupled Bow Tie Antenna for Communications, EUROEM 2004, Magdeburg, July / 19

13 Reference Synthesizer 3993,6 MHz synthesizer +5 dbm sine output 14 dbm rect. output PLL-IC Analog Devices ADF MHz oven controlled quartz oscillator reference Microcontroller for start-up [8] R. Langwieser, M. Fischer, A.L. Scholtz, M. Rupp, G. Humer; Flexible Radio Frequency Hardware for a Software Definable Channel Emulator; International Conference on Telecommunications and Computer Networks (IADAT), Portsmouth, UK; ; 5p 14 / 19

14 Clock Divider Differential clock for FGPA 3993,6 MHz : 32 = 124,8 MHz 32 = Single ended and LVPECL technology Input: 14 dbm Output: LVDS 15 / 19

15 System Overview 16 / 19

16 Conclusion and Outlook Transmitter hardware up and running Real time scope used as offline receiver IEEE a standard compliant impulse-radio UWB platform Highly modular and flexible Ongoing optimization of components Adaption of the platform to measurement campaigns Design of dedicated online receiver hardware 17 / 19

17 References [1] IEEE a, Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (WPANs): Alternate PHYs, IEEE, Park Avenue, NJ, 2007 [2] M. Fischer, A. Adalan, A.L. Scholtz, Ch. Mecklenbräuker; Architecture of a Modular IEEE a Ultra-Wideband Transmitter; Informationstagung Mikroelektronik 08, Wien; ; Österreichischer Verband für Elektrotechnik, Nr. 50 (2008); pp [3] T. Buchgraber, Experimental Evaluation of the IEEE a Standard, Diploma Thesis, Graz University of Technology, 2008 [4] A. Adalan, M. Fischer, A.L. Scholtz, Ch. Mecklenbräuker; UWB Transmit Signal Generation for Efficient Spectral Mask Utilisation in IEEE a; 3rd IEEE UWB Forum on Sensing and Communications, (2008), 24p [5] J. Shin, D. Schaubert; A Parameter Study of Stripline-Fed Vivaldi Notch-Antenna Arrays; IEEE Transactions on Antennas and Propagation, Vol. 47, No. 5, pp , May 1999 [6] W. Sörgel, C. Waldschmidt, W. Wiesbeck, Transient Responses of a Vivaldi Antenna and a Logarithmic Periodic Dipole Array for Ultra Wideband Communication, IEEE Antennas and Propagation Society International Symposium, Vol. 3, pp , Columbus, Ohio, June 2003 [7] W. Sörgel, C. Waldschmidt, W. Wiesbeck, An Ultra Wideband Aperture Coupled Bow Tie Antenna for Communications, EUROEM 2004, Magdeburg, July 2004 [8] R. Langwieser, M. Fischer, A.L. Scholtz, M. Rupp, G. Humer; Flexible Radio Frequency Hardware for a Software Definable Channel Emulator; International Conference on Telecommunications and Computer Networks (IADAT), Portsmouth, UK; ; 5p 18 / 19

18 Thank You for Your Attention Questions? Michael Fischer Vienna University of Technology Institute of Communications and Radio Frequency Engineering 19 / 19