近十年人們對於通訊設備的需求與日俱增，為了達到更高的資料傳輸量，在長期演進技術中定義了多輸入多輸出技術以提高通道容量和頻譜使用效率。
將多個天線設置於空間較小的手機內極易造成接收訊號不佳，因此為了要讓天線設計者評估新型的多天線系統是否符合預期，本論文使用軟體演算法設計一LTE多天線系統量測平台，該量測平台能夠快速分析系統的訊雜比、通道容量、吞吐量、錯誤率等效能數據，透過此軟體接收器在手機開發的初期即可利用較低成本，評估多天線設計系統的效能並協助手機開發商測試並且加快多天線手機導入市場的速度。

Demand for fast communication services has significantly increased in the past decade. In order to achieve the higher data rate, the fourth generation of mobile phone mobile communication standard (i.e., Long Term Evolution) has defined the multiple input and multiple output technique, which intends to significantly increase channel capacity and spectrum efficiency.
Plurality of antennas arranged in a small space shall easily cause poor reception signals. In order to make the antenna designers to evaluate the new multi-antenna system, thesis designs a measurement platform for LTE multiple input multiple output system by software. This measurement testbed can provide signal to noise ratio, channel capacity, throughput, error rates and other signal data quickly. Using the testbed, antenna designers could assess the effectiveness of multi-antenna system with a low-cost approach during the develop beginning. Moreover, the testbed can assist the development of mobile phone company testing and accelerating the mobile phone of multi-antenna into the market.

論文審定書 i
論文公開授權書 ii
摘要 iii
abstract iv
目錄 v
圖次 vii
表次 ix
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究架構 3
第二章 EUTRA/LTE 3GPP標準介紹 4
2.1 LTE簡介 4
2.2 正交分頻多工系統簡介 4
2.3 循環前綴 8
2.4 LTE訊框架構 8
2.5 資源框架 11
2.6 LTE下行鏈路物理通道和物理訊號簡介 13
2.6.1 主要同步訊號 13
2.6.2 次要同步訊號 15
2.6.3 特殊參考訊號 16
2.6.4 Physical control format indicator channel (PCFICH) 18
2.6.5 Physical hybrid ARQ indicator channel (PHICH) 19
2.6.6 Physical broadcast channel (PBCH) 20
2.6.7 Physical downlink control channel (PDCCH ) 20
2.6.8 Physical downlink shared channel (PDSCH) 22
第三章 同步偵測演算法介紹 23
3.1 LTE同步訊號介紹 23
3.2 同步前置作業 24
3.3 同步偵測演算法 25
3.3.1 頻域同步偵測 25
3.3.2 時域同步偵測 26
3.3.3 經過降取樣的時域同步偵測 27
3.4 同步訊號的二次偵測演算法 28
第四章 多天線系統 32
4.1 多天線系統簡介 32
4.2 LTE MIMO下行鏈路 33
4.2.1 LTE MIMO 預編碼 34
4.2.2 Layers 34
4.2.3 Code word 35
4.2.4 LTE MIMO 預編碼的選擇 35
4.3 LTE MIMO 偵測演算法 38
4.3.1 Zero forcing 演算法 38
4.3.2 LMMSE演算法 39
4.3.3 Maximum likelihood演算法 40
4.3.4 K-best 演算法 41
4.3.5 硬體實現Zero forcing演算法 44
4.3.6 硬體實現LMMSE演算法 44
第五章 軟體接收機實際成果 47
5.1 軟體接收機使用者介面 47
5.2 軟體接收機系統架構 48
5.2.1 接收機整體系統架構簡介 48
5.2.2 接收端八天線簡介 49
5.3 軟體接收機數據分析 50
第六章 結論 55

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