篇名 | Femtocell Networks in Indoor Environments |
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卷期 | 8:3 |
並列篇名 | 豪微微蜂巢於室內環境之研究 |
作者 | 陳雍宗 |
頁次 | 015-020 |
關鍵字 | 通道相關 、 MIMO-femtocell 、 預編碼 、 覆蓋區域 、 correlation channel 、 MIMO-femtocell 、 precoding 、 coverage area |
出刊日期 | 201209 |
本文研究毫微微蜂巢部署於多輸入多輸出(multiple-input multiple-output, MIMO)系統所引起的通道相關因素,也就是MIMO-femtocell系統。據了解,通道相關性的現象肯定會降低無線通訊的整體性能。此外,我們主張MIMO-femtocell部署的覆蓋區域會下降的原因是因為,在傳輸通道裡通道相關性的發生。文中利用一些推導到的解析性封閉公式,進行對存在於MIMO-femtocell系統中之通道相關現象進行討論。為了克服通道相關的效應,前置編碼之演算法亦於文中進行探討;此外,利用一些數值結果的舉例來驗證說明所推得之結果。值得一提的是,如果考慮通道相關現象在MIMO-femtocell系統中,於基地站(base station, BS)覆蓋區域範圍內,並且以這篇文章之結果和之前發布過的文獻比較,其覆蓋區域範圍大約有3-5倍差異。
This study investigates the channel correlation of a multiple-input multiple-output (MIMO) system tiered with a femtocellular network─specifically, a MIMO- femtocell (MIMO- FT) system, Channel correlation degrades the overall system performance of a wireless communication systems. Furthermore, this study argues that the coverage area of a MIMO-FT deployment will be reduced in size by channel correlation occurring in propagation channel. This study utilizes some derived analytical closed-form formulas to discuss the phenomenon of channel correlation occurring in MIMO-FT systems. In addition, an algorithm with precoding is explored for the purpose of mitigating the effects of channel correlation.