Performance Analysis of Adaptive Channel Estimation for Mobile WiMAX Downlink Transmission

• Main Authors: Reui-Kai Wu, 巫芮楷
• Other Authors: 劉玉蓀
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/3pnnm3

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 99 === In mobile communications, the signal amplitude and phase changed by multi-path interference and noise impact, so in order to receive the correct information need to compensate data through channel estimation. We propose time-average method, static weighted-average method and adaptive channel estimation method, and comparison with WiMAX popular two-dimensional linear interpolation. This thesis use standard IEEE 802.16e-2005 to make platform for simulation, and use channel model with established by ITU-R to simulate the mobile WiMAX downlink transmission platform. Simulation results show the performance of time-averaging method decreases to follow increased speed, the performance of static weighted-average method is not always better than two-dimensional linear interpolation method or time-averaging method, when the two are close to the performance, the performance will be superior to both; but the gap in performance between the two large, the performance can only between the both, adaptive channel estimation method is the best estimation method for all channel models considered.