適用於LTE-A下行系統之通道估測研究

Study On Channel Estimation for LTE-A Downlink System

張耘菱(Yun-Lin Chang)

指導教授 ： 魏學文

國立暨南國際大學/科技學院/電機工程學系通訊工程/碩士(2013年)

摘要

對稱式通道估測可適用於OFDM系統上，利用兩個訓練符元去估測出中間的通道響應，為了要應用於LTE-A系統上，將此方法改為偶數與奇數的通道估測方法。Q階時變多項式曲線在Q階皆求得的情況下，可以在一個OFDM符元週期內，所有的取樣點的通道增益值可以獲得。我們改善對稱式通道估測的方法應用到長期演進技術-進階(LTE-A)下行多播通道(Physical multicast channel, PMCH)。此方法可以提供更好的傳輸效率在高速行動的環境中，在高階且通道變化快速的環境下，也能得到不錯的效能。

關鍵字

正交分頻多工 ； 長期演進技術-進階 ； 通道估測 ； 多播通道 ； 訓練符元

並列摘要

We apply Puncher channel estimation to Orthogonal Frequency Division Multiplexing, (OFDM) communication system, using of two training symbols to estimate the channel response. In order to adapt to LTE-A system, we modified puncher channel estimation method into odd and even estimations. Q order time-varying polynomial curve are obtained in the case of OFDM symbol in a single duration, all of the sample points of the channel gain values can be obtained. We modified the puncher channel estimation method to adapt to LTE-A system. This method can provide better transmission efficiency in high mobility environments. The method works well in fast fading channel environments when the higher order polynomial is applied.

並列關鍵字

OFDM ； LTE-A ； Channel estimation, ； PMCH, ； Training symbol

參考文獻

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