Channel Estimation for Space-Time Block CodedOFDM Systems

• Main Authors: Chun-Yuan Chu, 朱俊源
• Other Authors: Miin-Jong Hao
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/82346719040203045176

碩士 === 國立高雄第一科技大學 === 電腦與通訊工程所 === 93 === Space-Time Block Coding (STBC) is a promising technique to improve the efficiency and performance of OFDM systems. However, decoding of STBC requires channel state information. We apply the least square estimation (LSE) to channel estimation. The channel fading coefficients are estimated by inserting training sequences which are mutually orthogonal in the transmitted signals. Thus we can decode the received signal by using the estimated training symbols. Four types of schemes were defined over a slow, flat, Rayleigh fading channel. The OFDM systems with the combination of the scheme of STBC and LSE are proposed in this thesis. The simulation results of this method are presented, and the conclusions are also given in this thesis.