Adaptive Estimation of Channel Impulse Response and Its Performance Evaluation in DVB-T Systems.
| Autor: | Ching-Wen Yeh, 葉靜文 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 The system for digital TV is European DVB-T in Taiwan and it applies OFDM Transmission. Not only noise signals, the receiver also takes relative delay, amplitude and phase from different path during OFDM Transmission. Hence, it forms Multi-Path Effect. The receiving signal will have Frequency Offset Situation if there is relative displacement between receiver and transporter. If the movement gets faster, there will also be more Doppler Effect. As time goes by, DVB-T path could change to Time Varying Channel. There will be different Doppler Spread on different path and Doppler Spread could destroy Carrier’s orthogonality and lead to ICI effect. This study focus on Estimation for Adaptive Channel Impulse Response. It estimates Channel Impulse Response through different path and help on Estimation for FFT Basis and higher the efficiency of receiving machine. This study performs 1D Interpolation, 2D Interpolation and Transform Domain Process to find its application under real environment and simulated channels such as TU6 and Longdelay. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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