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    Title: 通道估計誤差對正交分頻多工系統在多路徑雷利緩慢衰落通道下之位元錯誤率之影響
    Other Titles: Effects of channel estimation error on the BER performance of OFDM systems in multipath Rayleigh slowly fading channels
    Authors: 黃俊富;Huang, Chun-fu
    Contributors: 淡江大學電機工程學系碩士班
    易志孝;Yih, Chi-hsiao
    Keywords: 正交分頻多工;符際干擾;載波干擾;可加高斯雜訊;載波頻率偏差;通道狀態資訊;效能分析;位元錯誤率;orthogonal frequency division multiplexing;intersymbol interference;intercarrier interference;additive Gaussian noise;carrier frequency offset;channel state information;performance analysis;Bit error rate
    Date: 2007
    Issue Date: 2010-01-11 07:14:38 (UTC+8)
    Abstract: 在本論文中,我們研究通道估計誤差對正交分頻多工系統在多路徑雷利緩慢衰落通道之下之位元錯誤率之影響。由於可加白色高斯雜訊和殘餘載波頻率偏差所引起的載波間干擾,使得基於訓練符號的通道估測不完美。我們使用基於BPSK、QPSK、16-QAM、64-QAM的調變系統下所推導出的位元錯誤率公式,來描述由不完美的通道狀態資訊所導致系統效能降低的特性。而我們所推導出來的位元錯誤率公式不需要複雜的積分計算,可以很容易的計算出結果並且相當的精確。電腦模擬的結果可以驗證我們的理論分析。
    In this thesis, we study the effects of channel estimation error on the bit error probability of orthogonal frequency division multiplexing (OFDM) systems in multipath Rayleigh slowly fading channels. The channel estimation errors come from the additive white Gaussian noise (AWGN) and intercarrier interference (ICI) caused by the residual frequency offset (CFO) We derive the bit error rate (BER) formulas for BPSK, QPSK, 16-QAM, and64-QAM modulation schemes to characterize the performance degradation resulting from imperfect channel state information (CSI). Without complex numerical integrals in our BER formulas, they can be evaluated easily and accurately. Simulation results verify the correctness of our theoretical analysis.
    Appears in Collections:[電機工程學系暨研究所] 學位論文

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