發明
中華民國
103137876
I 559724
在時變與頻率選擇衰變通道環境中利用本質上的分集進行初始同步的方法與裝置INITIAL SYNCHRONIZATION METHOD AND APPARATUS ASSISTED BY INHERENT DIVERSITY OVER TIME-VARYING FREQUENCY-SELECTIVE FADING CHANNELS
國立中央大學
2016/11/21
本發明係關於一種在時變頻率選擇衰變通道環境中利用本質上的分集進行初始同步的方法與裝置。基於從統計推導下,本發明提出一種初始同步的方法,用以估測時序誤差與頻率載波飄移,利用嵌入多個匹配濾波器至耙型接收分支,來接近修正的克拉默-拉奥下界(MCRLBs)。並且,本發明利用最大比例合成準則來接近修正的克拉默-拉奥下界。實際上,在多路徑衰變通道下進行時序誤差與頻率載波飄移的估測,本發明所提出的技術可以顯著地優於傳統的初始同步技術。廣泛的電腦模擬使用統計方法,來驗證本發明所取得的改良。 The present invention relates to an initial synchronization method and apparatus assisted by inherent diversity over time-varying in frequency-selective fading environments. Based on motivation from statistical derivations, the present invention provides a novel initial synchronization for estimating time error and carrier frequency offset (CFO) by embedding matched filters (MFs) into the RAKE fingers to approach the modified CramerRao lower bounds (MCRLBs). The present invention is then built to approach the MCRLBs by taking advantage of the maximum ratio combining (MRC) criterion. In practice, the proposed technique can significantly outperform a conventional initial synchronization technique on the time-error and CFO estimations over multipath fading channels.
智權技轉組
03-4227151轉27076
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