TR2003-92

Time hopping and frequency hopping in ultrawideband systems


    •  Molisch, A.F., Zhang, J., Miyake, M., "Time Hopping and Frequency Hopping in Ultrawideband Systems", IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM), August 2003, vol. 2, pp. 541-544.
      BibTeX TR2003-92 PDF
      • @inproceedings{Molisch2003aug1,
      • author = {Molisch, A.F. and Zhang, J. and Miyake, M.},
      • title = {Time Hopping and Frequency Hopping in Ultrawideband Systems},
      • booktitle = {IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)},
      • year = 2003,
      • volume = 2,
      • pages = {541--544},
      • month = aug,
      • url = {https://www.merl.com/publications/TR2003-92}
      • }
  • MERL Contact:
  • Research Area:

    Communications

Abstract:

This paper analyzes frequency-hopping (FH) and time-hopping (TH) as multiple access format for ultrawideband communications. We apply the concept of "fourthegy", recently introduced by Subramanian and Hajek, to both TH and FH.We find that the design rules are different for FCC-compliant systems(where the power spectral density is limited)than for conventional systems(where the energy per bit is limited). We find that fourthegy, and thus possible information rate, is maximized by using a bandwidth that is as large allowed by the FCC. For TH systems, a low duty cycle should be used. For FH, a subdivision into as many bands as possible should be used, and the dwell time on each frequency should be at least as long as the delay spread of the channel.

 

  • Related News & Events

    •  NEWS    PACRIM 2003: 2 publications by Jinyun Zhang and others
      Date: August 28, 2003
      Where: IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)
      MERL Contact: Jinyun Zhang
      Brief
      • The papers "Time Hopping and Frequency Hopping in Ultra-wideband Systems" by Molisch, A.F., Zhang, J. and Miyake, M. and "A Rapid Acquisition Technique for Impulse Radio" by Gezici, S., Fishler, E., Kobayashi, H., Poor, H.V. and Molisch, A.F. were presented at the IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM).
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