Performance Comparison of DVB-T Channel Estimation

• Main Authors: Yi-Sheng Wang, 王義盛
• Other Authors: 尤信程
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/a8h473

碩士 === 國立臺北科技大學 === 資訊工程系研究所 === 98 === DVB-T adopts OFDM modulation technique to transmit signal, during transmission of the signal, it is affected by channel effect and AWGN. The channel effect causes receivers to derive channel frequency response, and then to compensate it. In our research, we implement various channel estimation methods, including 1D Interpolation, 2D Interpolation, Decision Feedback, Auto Regressive, and Transform Domain Process channel estimation. In this thesis, we compare the performance of the above channel estimation methods in real environment and simulated channels such as TU6 and Longdelay. In high speed environment, DVB-T signal passes through time-varying channel. Doppler Spread occurs in received signal, and it destroys carrier orthogonality and ICI effect come up. In the experiment, we implement Adaptive Selection of Cutoff Frequency of Transform Domain Process and Frank Window Process to compare the relative performance of these approaches at mobile reception condition.