Capacity of time-hopping PPM and PAM UWB multiple access communications over indoor fading channels

  • Authors:
  • Hao Zhang;T. Aaron Gulliver

  • Affiliations:
  • Department of Electrical Engineering, Ocean University of China, Qingdao, China;Department of Electrical & Computer Engineering, University of Victoria, Victoria, BC, Canada

  • Venue:
  • EURASIP Journal on Wireless Communications and Networking
  • Year:
  • 2008

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Abstract

The capacity of time-hopping pulse position modulation (PPM) and pulse amplitude modulation (PAM) for an ultra-wideband (UWB) communication system is investigated based on the multipath fading statistics of UWB indoor wireless channels. A frequency-selective fading channel is considered for both single-user and multiple-user UWB wireless systems. A Gaussian approximation based on the single-user results is used to derive the multiple access capacity. Capacity expressions are derived from a signal-to-noise-ratio (SNR) perspective for various fading environments. The capacity expressions are verified via Monte Carlo simulation.