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Performance Analysis of OFDMA Uplink Systems with Symbol Timing Misalignment  

Park Myonghee (Dept. of Electrical and Electronic Eng., Yonsei University)
Hong Daesik (Dept. of Electrical and Electronic Eng., Yonsei University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.2, 2005 , pp. 17-22 More about this Journal
Abstract
This paper presents our investigation for the effect of symbol timing errors in orthogonal frequency division multiple access (OFDMA) uplink systems. We express the symbol timing errors between users as the symbol timing misalignments with respect to the desired user. Then, we derive an explicit expression of the average effective signal-to-interference-plus-noise ratio. (SINR) as a function of the maximum value of the symbol timing misalignments. Based on the resulting SINR degradation, we evaluate the SINR gain with guard subcarriers in order to mitigate the effect of the symbol timing misalignments.
Keywords
성능분석;OFDMA 시스템;시간오차;신호대 간섭잡음비;
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