An Interference Cancellation Scheme for Carrier Frequency Offsets Compensation in the Uplink of OFDMA systems

• Main Authors: Sen-Hung Wang, 王森弘
• Other Authors: Chih-Peng Li
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/35178790449634331172

碩士 === 國立中山大學 === 通訊工程研究所 === 94 === A successive interference cancellation (SIC) structure is proposed for multiuser interference cancellation (MUI) due to carrier frequency offsets (CFOs) in the uplink of orthogonal frequency division multiple access (OFDMA) systems. The proposed architecture adopts a circular convolution to suppress the impacts caused by CFOs. This paper demonstrates that, with 2 iterations, the SIC has better performance than that of the parallel interference cancellation (PIC), but system complexity is only 1/2K, where K is the number of users in the uplink of OFDMA system. This study also shows that system complexity can be significantly reduced if proper approximation is made.