volume | PIER Journals

Abstract

In this paper, we present a comprehensive framework from synthesis to implementation of active matched filters for UWB Impulse Radio. The method delays and sums UWB pulses coherently to strengthen the signal over white Gaussian noise. Theoretical analysis shows that the signal peak is maximized against noise, and an arbitrary transfer function could be realized by adjusting filter parameters. To verify the concept, a four-stage matched filter operating in 3-5 GHz with 360 degrees phase delay is demonstrated first. It is implemented in a commercial 2-μm GaAs HBT process and achieves a power gain of 13.8 dB with a 10 dB bandwidth of 1.3 GHz. Based on a similar architecture, another design is presented but with only half of the delay. It has a power gain of 15.9 dB at the center frequency of 4 GHz and a 10 dB bandwidth of 2.3 GHz. An advantage of the proposed method is a precise control of the impulse response that can be matched to either symmetrical or asymmetrical UWB pulses by taking a time domain design approach.

1. , , , Ubisense Real-time Location Systems (RTLS), Ubisense, Cambridge, U.K. [Online]. , Available: http://www.ubisense.net/en/rtls-solutions.

2., Time Domain's Ultra Wideband (UWB) Definition and Advantages, Time Domain Corp., Huntsville, AL, [Online]., Available: http://www.timedomain.com.
doi:10.1109/JPROC.2008.2008846

3. , , , Dart UWB Hub & Sensors, Zebra Technologies [Online]. Available: http://www.zebra.com .
doi:10.1109/LAWP.2005.844145

4., DecaWave ScenSor Product Brief, Decawave, Dublin, Ireland, [Online]. Available: http://www.decawave.com/downloads1.html.

5. Kuhn, M. J., M. R. Mahfouz, C. Zhang, B. C. Merkl, and A. E. Fathy, "A system-level simulation framework for UWB localization," IEEE Trans. Microw. Theory Tech., Vol. 58, No. 12, 3527-3537, Dec. 2010.
doi:10.1109/TVT.2009.2021943

6. Dardari, D., A. Conti, U. Ferner, A. Giorgetti, and M. Z. Win, "Ranging with ultrawide bandwidth signals in multipath environments," Proc. IEEE, Vol. 97, No. 2, 404-426, Feb. 2009.

7. Low, Z. N., J. H. Cheong, C. L. Law, W. T. Ng, and Y. J. Lee, "Pulse detection algorithm for line-of-sight (LOS) UWB ranging applications," IEEE Antennas Wireless Propag. Lett., Vol. 4, 63-67, Jun. 2005.

8. Redfield, R., S. Ye, and H. Liu, "High-precision indoor UWB localization: Technical challenges and method," Proc. IEEE Int. Conf. Ultra-wideband, 1-4, Sep. 2010.
doi:10.1109/TMTT.2006.885908

9. Yen, N. Y. and S. L. Su, "Robust matched-filter acquisition for direct-sequence ultrawideband systems," IEEE Trans. Veh. Technol., Vol. 58, No. 8, 4419-4425, Aug. 2009.

10. Brocato, R., E. Heller, J.Wendt, J. Blaich, G.Wouters, E. Gurule, G. Omdahl, and D. Palmer, "UWB communication using SAW correlators," Proc. IEEE Radio and Wireless Symp., 267-270, Sep. 2004.

11. Arnedo, I., I. Arregui, M. Chudzik, A. Lujambio, M. A. G. Laso, T. Lopetegi, J. D. Schwartz, J. Azana, D. V. Plant, and IEEE, "Arbitrary UWB pulse generation and optimum matched-filter reception," Proc. IEEE Int. Conf. Ultra-wideband, 43-48, New York, Sep. 2009.

12. Kawano, Y., Y. Nakasha, K. Yokoo, S. Masuda, T. Takahashi, T. Hirose, Y. Oishi, and K. Hamaguchi, "RF chipset for impulse UWB radar using 0.13-μm InP-HEMT technology," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 12, 4489-4497, Dec. 2006.
doi:10.1109/TIT.1960.1057571

13. Xia, J., C. L. Law, and J. Jiang, "A novel 3-5 GHz active matched filter for impulse radio ultra-wideband," IEEE Microw. Wireless Compon. Lett., Vol. 19, No. 7, 458-460, Jul. 2009.

14. Xia, J., C. L. Law, and Y. Zhou, "Synthesis and design of novel active MMIC matched filters for ultrawideband impulse radio," IEEE MTT-S Int. Microw. Symp. Dig., Baltimore, MD, Jun. 2011.
doi: --- Either ISSN/ISBN or Series/Volume title must be supplied.

15. Xia, J., C. L. Law, Y. Zhou, and K. S. Koh, "3-5 GHz UWB impulse radio transmitter and receiver MMIC optimized for long range precision wireless sensor networks," IEEE Trans. Microw. Theory Tech., Vol. 58, No. 12, 4040-4051, Dec. 2010.
doi: --- Either ISSN/ISBN or Series/Volume title must be supplied.

16. Turin, G., "An introduction to matched filters," IRE Trans. Inf. Theory, Vol. 6, No. 3, 311-329, Mar. 1960.
doi: --- Either ISSN/ISBN or Series/Volume title must be supplied.

17. , , , AWR AXIEM Extract Flow White Paper, AWR Corp, [Online]. Available: http://web.awrcorp.com .
doi: --- Either ISSN/ISBN or Series/Volume title must be supplied.

18. Fang, C., C. L. Law, J. C. M. Hwang, and J. Xia, "Design and analysis of high-voltage high-efficiency ultra-wideband pulse synthesizer," Progress In Electromagnetics Research C, Vol. 20, 187-201, 2011.
doi: --- Either ISSN/ISBN or Series/Volume title must be supplied.

Dr. Jingjing Xia

Dr. Choi Look Law

Dr. Yuan Zhou