A Study on Pilot Contamination Suppression Methods for 5G Cellular Mobile Radio Communication Systems

• Main Authors: Hung, Ming-Chien, 洪銘謙
• Other Authors: Huang, Chia-Chi
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/28q7h9

碩士 === 國立交通大學 === 電信工程研究所 === 103 === In this thesis, we propose two kinds of iterative channel estimation method to suppress the pilot contamination phenomenon in 5G cellular mobile radio communication systems. Due to pilot sequence reuse in different cells, the estimated channel would be contaminated by neighboring cells which use the same pilot. To solve the pilot contamination problems caused by pilot sequence reuse, we first use estimated data sequence as a pilot signal to execute iterative channel estimation. Secondly, as the pilot and data sequences are transmitted in a combined manner, our second proposed method utilizes data sequence as an auxiliary pilot signal in addition to utilizing the orthogonal pilot signal when executing channel estimation. Our simulation results show that these methods can achieve the required BER performance within a acceptable number of iterations.