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A novel multi-access scheme for UWB-PPM communication systems

Khani, H ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1002/ett.1158
  3. Publisher: 2007
  4. Abstract:
  5. In this paper, it is shown that some spikes exist in power spectral density (PSD) of ultra-wideband-time-hopping-pulse-position-modulation (UWB-TH-PPM) transmitted signal. Analytical and numerical simulation results show that these spikes severely degrade UWB-TH-PPM system bit-error-rate performance and must be properly removed. This paper proposes a novel multi-access scheme that uses both direct-sequence (DS) and time-hopping (TH) multi-access schemes to remove these harmful spikes. Analytical and numerical simulation results show that the proposed scheme removes the spikes from the PSD of the UWB-TH-PPM transmitted signal and yields better performance. In this paper, the performance of the proposed multi-access scheme is examined with numerical simulations in the presence of additive white Gaussian noise (AWGN), multipath interference (MPI), narrow-band interference (NBI), and multi-access interference (MAI); and furthermore closed form representations for the probability of error of both proposed and conventional multi-access UWB-PPM schemes are given. Copyright © 2006 AEIT
  6. Keywords:
  7. Access control ; Bit error rate ; Broadband networks ; Computer simulation ; Direct sequence systems ; Power spectral density ; Pulse modulation ; PPM system ; Time-hopping (TH) ; Transmitted signal ; Ultra-wideband-time-hopping-pulse-position-modulation (UWB-TH-PPM) ; Communication systems
  8. Source: European Transactions on Telecommunications ; Volume 18, Issue 4 , 2007 , Pages 389-401 ; 1124318X (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/10.1002/ett.1158