SC-FDMA系统频偏补偿算法研究

On Carrier Frequency Offset in Single Carrier FDMA System

该文建立SC-FDMA系统频偏模型,分析了频偏对系统的影响,包括子载波干扰(ICI)和多用户间干扰(MUI).并分析了直接频偏补偿算法与CLJL补偿算法对系统的影响,通过分析与计算机仿真得出,单用户时直接频偏补偿方案实现方式较好,而在多用户时,CLJL方案实现方式较好.该文结合了CLJL补偿方案与干扰消除方案应用于SC-FDMA系统,研究了一种迭代干扰消除接收算法,此算法能有效地消除干扰补偿频偏,改善系统性能.

The carrier frequency offset （CFO） model for SC-FDMA system has been built, and the influ- ence of carrier frequency offset on this system, namely, Inter-Carrier-Interference （ICI） as well as multius- er interference （MUI） analyzed. The influence of CFO compensation scheme of the direct method and CLJL method on SC-FDMA system has been analyzed. The direct scheme is simple in single user situation. However, CLJL scheme is simpler and better than the former in multiuser system. The paper deals with the combination of the CLJL scheme and the interference cancellation scheme, yielding the iterative inter- ference cancellation scheme. This scheme is effective to improve the performance of system.