Meny

Javascript is not activated in your browser. This website needs javascript activated to work properly.
Du är här

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

Författare:
Publiceringsår: 2011
Språk: Engelska
Publikation/Tidskrift/Serie: Wireless Personal Communications
Dokumenttyp: Artikel
Förlag: Springer

Sammanfattning

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.

Disputation

Nyckelord

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

Övriga

Published
Yes
  • Radio Systems
  • ISSN: 0929-6212

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen