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Non-coherent Detection and Analysis of Ultra-Wideband (UWB) Communication Systems

Manaffam, Saeed | 2008

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39392 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri Kenari, Masoumeh
  7. Abstract:
  8. In this thesis, we investigate the previously introduced Code-Shifted Reference (CSR) time hopping (TH) ultra-wideband (UWB) communication systems as a potential transmitted scheme reference technique. In this system, the orthogonality between the reference and data bearing signals is acquired in code domain. Also, we consider a simple scheme to clean to obtain a clean template to be used in the correlator receiver for the CSR –UWB, this method was used in UWB system before. In this method, which we call as averaged (Ave.) CSR-UWB, the template for each symbol is obtained by taking the average over all the frames of the symbol interval. It is shown that Ave-CSR system achieves higher multi-rate capability than the conventional CSR system; it almost doubles the multi-rate. We analytically evaluate the performance of the CSR and our proposed systems in commonly used channel models for UWB systems known as tapped-delay-line in single user environment. The results show substantial improvement of the proposed system over the previously presented transmitted reference schemes. Then, we propose a protocol for multiple access scenarios and analyze its performance. It is demonstrated that our method always obtains dramatically improvement when the spreading energy factor, i.e. number of frames, increases. We provide simulation results for both additive white Gaussian and CM1 channels which confirm the analytical results
  9. Keywords:
  10. Ultra Wide Band (UWB)Communication ; Multiple Access Interference ; Correlator ; Time Hopping-Ultra Wide Band ; Transmitted Reference System

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