Improved channel estimation algorithms for MIMO OFDM systems

• Main Authors: Meng-Yi Lin, 林孟毅
• Other Authors: 吳國光
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/28678799705619984099

碩士 === 國立中興大學 === 通訊工程研究所 === 96 === Multiple-input-multiple-output（MIMO）in combination with orthogonal frequency division multiplexing（OFDM）can be used to improve the efficiency of mobile wireless communication systems. Specifically, with MIMO-OFDM, the transmission rate and transmission range can be greatly enhanced at the same bit error rate condition. However, accurate channel parameter estimation will be needed in MIMO-OFDM systems for diversity combining, coherent detection and decoding, which is more complicated than channel estimation in SISO-OFDM systems. In this thesis, we will investigate existing algorithms for MIMO-OFDM channel estimation. Several reduced-complexity algorithms will be examined and we will propose methods to combat the performance degradation of these algorithms arising from some underlying assumptions.