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INSTITUTFÜR NACHRICHTENTECHNIKUND HOCHFREQUENZTECHNIK
An IR UWB Research and An IR UWB Research and Development PlatformDevelopment Platform
for 802.15.4afor 802.15.4a
Michael FischerAyse Adalan
2009-04-15
4th UWB Forum onSensing and Communication
Vienna University of Technology
2 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
OutlineOutline
Background
Platform Overview
Transmitter Components
Validation Measurements
Conclusion and Outlook
3 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Background
[1] IEEE 802.15.4a,Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications forLow-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 802.15.4a Ultra-Wideband Transmitter; Informationstagung Mikroelektronik 08, Wien; 15.10.2008 - 16.10.2008; Österreichischer Verband fürElektrotechnik, Nr. 50 (2008); pp. 284 - 288
4 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Background IEEE 802.15.4a
IEEE 802.15.4a utilizing different frequency bands
Different modulation schemes and bitrates inside frame
Common parameters:pulse repetition frequency (PRF) = 499,2 MSymbols/spulse / chip duration TC = 2 nsternary symbols {−1, 0, +1}
5 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
System Overview
FPGA
MGT
MGT
3993,6 MHz124,8 MHz
10 MHz
+
−
CPU
Rx
7 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Xilinx Virtex II ProOutput via two MGTs (RocketIO)
Power combiner with baluns
Baseband Signal Generation (1)
[3] T. Buchgraber, Experimental Evaluation of the IEEE 802.15.4a Standard, Diploma Thesis, Graz University of Technology, 2008
8 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Baseband Signal Generation (2)
9 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Baseband Signal Generation (3)
10 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Pulse Shaping
Ensure compliance with constraints in time and frequency domainTake into account all components of the transmitterChannel dependant bandwidth
[4] A. Adalan, M. Fischer, A.L. Scholtz, Ch. Mecklenbräuker; UWB Transmit Signal Generation for Efficient Spectral Mask Utilisationin IEEE 802.15.4a; 3rd IEEE UWB Forum on Sensing and Communications, (2008), 24p
11 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Upconversion
Triple balanced passive mixerIntegrated balunsLO: +10 dBmRF: 1000 MHz to 5000 MHz
12 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Output Filter
Suppress higher mixing products
Ensure spectral compliance
Monolithic ormicrostrip solution
Possible combinationwith antenna
13 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
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. 879-886, 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. 592-595, 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
14 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Reference Synthesizer
3993,6 MHz synthesizer+5 dBm sine output−14 dBm rect. output
PLL-IC Analog Devices ADF4153
10 MHz oven controlledquartz oscillator reference Microcontroller forstart-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; 27.09.2006 - 29.09.2006; 5p
15 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Clock Divider
Differential clock for FGPA3993,6 MHz : 32 = 124,8 MHz32 = 2 · 4 · 4Single ended and LVPECL technology
Input: −14 dBmOutput: LVDS
16 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
System Overview
17 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Conclusion and OutlookConclusion and Outlook
Transmitter hardware up and runningReal time scope used as offline receiver
IEEE 802.15.4a standard compliant impulse-radio UWB platformHighly modular and flexible
Ongoing optimization of componentsAdaption of the platform to measurement campaignsDesign of dedicated online receiver hardware
18 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
References
[1] IEEE 802.15.4a, 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 802.15.4a Ultra-Wideband Transmitter; Informationstagung Mikroelektronik 08, Wien; 15.10.2008 - 16.10.2008; Österreichischer Verband für Elektrotechnik, Nr. 50 (2008); pp. 284 – 288
[3] T. Buchgraber, Experimental Evaluation of the IEEE 802.15.4a 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 802.15.4a; 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. 879-886, 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. 592-595, 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; 27.09.2006 - 29.09.2006; 5p
19 / 192009-04-15 UWB Forum Vienna – Michael Fischer – R&D Platform for 802.15.4a
Thank You for Your AttentionThank You for Your Attention
Questions?
Michael FischerVienna University of TechnologyInstitute of Communications and Radio Frequency Engineeringmichael.fischer@nt.tuwien.ac.at
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