Decision-feedback Receiver Design with Multistage Interference Cancellation for LTE Uplink System under High Mobility

• Main Authors: Chien-Feng Tseng, 曾健峰
• Other Authors: 鄧俊宏
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/65035845838328272160

碩士 === 元智大學 === 通訊工程學系 === 98 === Single Carrier Frequency Division Multiple Access（SC-FDMA）has been considered as a promising uplink transmission scheme for next generation mobile communication in LTE specification due to its low peak to average power ratio（PAPR）. However, SC-FDMA system is similar to the conventional OFDM system, it is not applicable under high mobility due to the inter-carrier interference（ICI）. In this thesis, we propose MVDR channel estimator and time domain least square channel estimator. For the time domain least square estimator, we proposed a group-based frequency domain equalizer to replace the original one and reduce the computational complexity. In order to mitigate the ICI problems, we used the group-based parallel interference cancellation with the frequency domain soft decision feedback and the full parallel interference cancellation with the time domain hard decision feedback schemes. Next, we proposed a novel channel estimator error and maximum likelihood search algorithms to enhance the data detection performance. Finally, we evaluate the performance of the proposed system under high mobility using LTE standard and confirm that it achieves good BER performance.