以共同載波頻率偏移修正於交錯分配正交分頻多重存取系統

A Common Carrier Frequency Offset Correction Scheme in Interleaved OFDMA Systems

賴勇利(Yung-Li Lai)

指導教授 ： 張大中

國立中央大學/資訊電機學院/通訊工程學系/碩士(2008年)

摘要

以共同載波頻率偏移修正於交錯分配正交分頻多重存取系統在本篇論文被提出與探討。雖然在過去的方法中，由多使用者之載波頻率偏移所造成的多重存取干擾可以被有效的消除，特定使用者子載波間的干擾卻不能完全被移除。在我們的方法中，發現在交錯分配正交分頻多重存取系統中可以完全移除特定使用者子載波間的干擾。模擬結果顯示以最佳共同載波頻率偏移修正可達到最小均方誤差效能

關鍵字

正交分頻多重存取 ； 載波頻率偏移

並列摘要

An interleaved OFDMA system with a common carrier frequency offset correction scheme is studied in the thesis. Although the multiple access interference (MAI) effect due to the carrier frequency offsets (CFOs) among multiusers can be mitigated in past works, the intercarrier interference (ICI) effect was not removed. In our work, we explore and remove the ICI effect in an interleaved OFDMA system with CFOs. Simulation results show that the new scheme with optimal common CFO correction can achieve the minimum mean square error performance.

並列關鍵字

OFDMA ； carrier frequency offset

參考文獻

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