於正交分頻多工與單載波分頻多址系統設計高頻寬效益之領航信號

Spectrally Efficient Pilot Waveforms for Channel Estimation in OFDM and SC-FDMA

吉柏蒼(Po-Tsang Chi)

指導教授 ： 鐘嘉德

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2017年)

https://doi.org/10.6342/NTU201700956

摘要

利用領航信號來估測通道資訊對於正交分頻多工與單載波分頻多址系統非常重要因為接收端必須要知道部分的通道資訊才可以根據此資訊來設計等化器藉此減緩通道對於信號所造成的影響。
本論文提出讓資料信號與領航信號各自做處理來提升各自的頻譜效益。資料信號可以使用已知的旁頻帶抑制技術來提升頻譜效益，此篇論文提出一種建構領航信號的方式使其可以達到最佳的通道估測效能同時可以有很高的頻譜效益。從模擬結果可得知在可達到最佳的通道估測效能的領航信號中透過本篇論文所提出的方法所建構的領航信好相較於標準所適用的領航信號有較好的頻譜緊密度。

關鍵字

正交分頻多工 ； 單載波分頻多址系統 ； 領航信號 ； 旁頻帶壓抑

並列摘要

Pilot-aided channel estimation is essential to orthogonal frequency division multiplexing and single-carrier frequency division multiple access. Under the system setup that data and pilot waveforms are processed individually for enhancing the spectral efficiency of the composite waveform, pilot patterns are designed here to jointly optimize channel estimation on quasi-static multipath channels and provide extremely high spectral compactness by suppressing spectral sidelobes. Among the demonstrated pilot patterns achieving optimum channel estimation, the pilot waveforms using DI-typed pilot patterns developed from the proposed procedures are shown to exhibit higher spectral compactness than conventional pilot waveforms.

並列關鍵字

Orthogonal frequency-division multiplexing ； Single-carrier frequency division multiple access ； pilot ； sidelobe suppression

參考文獻

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