An Efficient Channel Tracking Method for Mobile OFDM System

• Main Authors: Tien-Chi Tsou, 鄒典齊
• Other Authors: Shih-Kai Lee
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/96332095128201070953

碩士 === 元智大學 === 通訊工程學系 === 95 === The channel variation and Doppler Effect should be solved in a mobile communication environment. Two methods of channel estimation have been proposed from two facts in this thesis. First, an efficient channel tracking method is proposed to estimate the channel variation in the vehicle to vehicle communication environment under the IEEE 802.11p standard. Second, we proposed an iterative method which joints channel estimation and LDPC decoding by using Expectation Maximization (EM) and Sum-Product Algorithm (SPA). In our simulation that based on normalized Doppler environment, we can obtain good system performance after several iteration.