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Non-coherent detection of impulse radio UWB signals based on fourth order statistics

In English

Författare

  • Muhammad Gufran Khan
  • Benny Sällberg
  • Jörgen Nordberg
  • Fredrik Tufvesson
  • Ingvar Claesson

Summary, in English

Low-complex and low power non-coherent energy detector (ED) is interesting for low data rate impulse radio (IR) ultra wideband (UWB) systems but, compared to coherent receivers, it suffers from a loss in performance due to low signal-to-noise ratio (SNR) at the detector. In addition, the performance of an ED strongly depends on the integration interval (window size) of the integrator and the window position. A non-coherent kurtosis detector (KD) and a fourth-order detector (FD), which can discriminate between Gaussian noise signals and non-Gaussian IR-UWB signals by directly

estimating the fourth-order moment of the received signal, are presented. The performance of the detectors is evaluated using real channels measured in a corridor, an office and a laboratory environment. The results

show that bit-error-rate (BER) performance of the proposed KD receiver is better than the ED receiver only under certain conditions, while the FD receiver is slightly better than the ED in low SNR region and its performance improves as the SNR increases. In addition, the performance of the FD receiver is less sensitive to overestimation of the integration interval

making it relatively robust to variations of the channel delay spread. Finally, a criteria for the selection of integration time of the proposed detector is suggested.

Publiceringsår

2011

Språk

Engelska

Publikation/Tidskrift/Serie

Wireless Personal Communications

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • UWB communications
  • Non-coherent detection
  • Higher-order moments
  • Channel measurement

Status

Published

Forskningsgrupp

  • Radio Systems

ISBN/ISSN/Övrigt

  • ISSN: 1572-834X