利用一階最小均方差頻域等化器之正交頻分多工接收器架構應用於短距無線通訊之性能表現

The performance of an OFDM receiver with LMS-FDE for DSRC

林盟翔(Meng-Hsiang Lin)

指導教授 ： 李世凱

元智大學/工程學院/通訊工程學系/碩士(2006年)

https://doi.org/10.6838/YZU.2006.00121

摘要

在本論文中,我們討論在IEEE 802.11p的規格下,在車對車(vehicle-to- vehicle)及路對車(roadside-to-vehicle)的通訊中,如何產生在不同環境下的通道效應。以及在OFDM系統下,加入通道資訊來輔助Viterbi解碼,通道資訊取得來自於不同子載波上的一階頻域LMS等化器係數,相較於一般OFDM接收端架構,由於等化器係數會隨著每個OFDM symbol不斷的做更新的動作,來反應當時每個子載波所受到的通道效應,所以會有比較佳的效能。

關鍵字

短距無線通訊 ； 正交頻分多工

並列摘要

In this thesis, we discuss that under the specification of IEEE 802.11p , how to produce the channel effect in the environment of vehicle-to- vehicle and roadside-to-vehicle. And the Viterbi decoder with channel state information(CSI) for OFDM based system. And the CSI is obtained from the weighting value of one-tap frequency domain LMS equalizers on different subcarriers. Simultaneously, we would observe clearly that through the updating coefficients. The method could reflect the channel state. We could see the better performance is obtained.

並列關鍵字

ofdm ； DSRC

參考文獻

Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specification

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