Performance of ultra-wideband radio under different pulse shape scenario using STDL channel model | |
| Author | Ghimire, Rabindra |
| Call Number | AIT Thesis no.TC-03-05 |
| Subject(s) | Ultra-wideband devices Code division multiple access |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TC-03-05 |
| Abstract | Ultra-wideband (UWB) systems, which utilize bandwidths in excess of 1.5 GHz with very low power spectral densities, are currently attracting great deal of global attention as a means of wresting additional capacity to the heavily utilized store of wireless bandwidth. In this thesis, the UWB indoor channel characteristic is studied for various input pulse shapes. A stochastic tapped delay line (STDL) model of the channel is implemented to evaluate the BER performance of the system at various distances between transmitter and receiver under different pulse shape scenarios. The system model is based on direct sequence code division multiple access concepts and RAKE receiver is used for signal reception. The performance of the system is evaluated and compared for various pulse shapes with various interference scenarios. OFDM signal of IEEE 802.11a system that occupies a relatively narrow bandwidth compared with that of UWB is used as narrowband interference. Based on the simulation results, it is found that pulse shape has noticeable impact on the performance of the system. In the absence of interference Rayleigh pulse and the third derivative of Gaussian pulse show better performance than any other pulses that are used. Simulation results show significant degradation in the performance of the system with increasing number of UWB interference. The presence of narrowband interference and UWB interference shows that there is negligible effect of the narrowband interference on the performance of the system for the SIR greater than -10 dB. The results obtained by using third derivative of Gaussian pulse show better performance in the presence of UWB and narrowband interferences. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-03-05 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Ahmed, Kazi M. ; |
| Examination Committee(s) | Erke, Tapio J. ;Teerapat Sanguankotchakorn; |
| Scholarship Donor(s) | Government of Finland; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |