Title page for ETD etd-09282004-171542

Type of Document Master's Thesis
Author Yang, Liu
Author's Email Address lyang@vt.edu
URN etd-09282004-171542
Title The Applicability of the Tap-Delay Line Channel Model to Ultra Wideband
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Buehrer, Richard Michael Committee Chair
Annamalai, Annamalai Jr. Committee Member
Woerner, Brian D. Committee Member
  • ultra-wideband
  • pulse distortion
  • channel model
  • UWB
Date of Defense 2004-09-15
Availability unrestricted

Ultra-wideband (UWB) communication systems are highly promising because of their capabilities for high data rate information transmission with low power consumption and low interference and their immunity to multipath fading. More importantly, they have the potential to relieve the "spectrum drought" caused by the explosion of wireless systems in the past decade by operating in the same bands as existing narrowband systems. With the extremely large bandwidth of UWB signals, we need to revisit UWB channel modeling. Specifically we need to verify whether or not the traditional tap-line delay channel model is still applicable to UWB.

One essential task involved in channel modeling is deconvolving the channel impulse response from the measurement data. Both frequency domain and time domain techniques were studied in this work. After a comparison, we examined a time domain technique known as the CLEAN algorithm for our channel modeling analysis. A detailed analysis of the CLEAN algorithm is given, as it is found that it is sufficient for our application.

The impact of per-path pulse distortion due to various mechanisms on the tap-delay line channel model is discussed. It is shown that with cautious interpretation of the channel impulse response, the tap-line delay channel model is still applicable to UWB.

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