Acquisition of ultra-wideband signals

The acquisition of ultra-wideband (UWB) signals is a potential bottleneck for system throughput in a packet-based network employing UWB signaling format in the physical layer. The problem is mainly due to the low received signal power which forces the acquisition system to process the signal over long periods of time before getting a reliable estimate of the timing of the signal. Hence there is a need to develop more efficient acquisition schemes by taking into account the signal and channel characteristics. In this work, we investigate different acquisition schemes in different UWB systems to improve the acquisition performance. We also study the best possible acquisition performance in the dense multipath UWB channel.

Sponsors: AFRL

Publications

  1. S. Aedudodla, S. Vijayakumaran, and T. F. Wong, "Acquisition of Direct-Sequence Transmitted Reference Ultra-Wideband Signals," IEEE Journal on Selected Areas in Communications, 2006. To appear.
  2. S. Aedudodla, S. Vijayakumaran, and T. F. Wong, "Ultra-wideband signal acquisition with hybrid DS-TH spreading," IEEE Transactions on Wireless Communications, 2006. To appear.
  3. S. Vijayakumaran and T. F. Wong, "Equal Gain Combining for Acquisition of Time-Hopping Ultra-Wideband Signals," IEEE Transactions on Communications, 2006. To appear.
  4. S. Vijayakumaran and T. F. Wong, "A Search Strategy for Ultra-Wideband Signal Acquisition," IEEE Transactions on Communications, Nov. 2005.
  5. S. Vijayakumaran, T. F. Wong, and S. Aedudodla, "On the Asymptotic Performance of Threshold-based Acquisition Systems in Multipath Fading Channels," IEEE Transactions on Information Theory, vol. 51, no. 11, pp. 3973-3986, Nov. 2005.
  6. S. Aedudodla, S. Vijayakumaran, and T. F. Wong, "Timing Acquisition in Ultra-wideband Communication Systems," IEEE Transactions on Vehicular Technology, Sep. 2005. Invited paper.
  7. S. Aedudodla, S. Vijayakumaran, and T. F. Wong, "Timing Acquisition for Transmitted Reference UWB Signals with Direct-Sequence Spreading," in Proceedings of the IEEE Military Communications Conference (MILCOM '05), Atlantic City, NJ, Oct. 2005.
  8. S. Vijayakumaran, T. F. Wong, and S. Aedudodla, "On the Asymptotic Performance of Threshold-based Acquisition Systems in Multipath Fading Channels," in Proceedings of the IEEE Information Theory Workshop, pp. 170-175, San Antonio, TX, Oct. 2004.
  9. S. Vijayakumaran and T. F. Wong, "Best Permutation Search Strategy for Ultra-Wideband Acquisition," in Proceedings of the IEEE Vehicular Technology Conference, Los Angeles, vol. 2, pp. 1184-1187, CA, Sep. 2004.
  10. S. Aedudodla, S. Vijayakumaran, and T. F. Wong, "Rapid ultra-wideband signal acquisition," in Proceedings of the IEEE Wireless Communications and Networking Conference (WCNC '04), vol. 2, pp. 1148-1153, Atlanta, GA, Mar. 2004.
  11. S. Vijayakumaran and T. F. Wong, "Equal Gain Combining for Acquisition of UWB Signals," in Proceedings of the IEEE Military Communications Conference (MILCOM '03), vol. 2, pp. 880-885, Boston, MA, Oct. 2003.

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Last modified: 11/9/05