比起正交分頻多工(Orthogonal Frequency Division Multiplexing, OFDM)調變，濾波器組多載波(Filter Bank-Based Multicarrier, FBMC)調變近期被發展來壓縮頻譜，以提升頻譜使用效率。與OFDM不同的是，FBMC使用了偏移正交振幅調變(Offset Quadrature Amplitude Modulation, OQAM)，以及每個子載波所佔的空間更少，基於使用OQAM的FBMC稱為FBMC/OQAM。然而FBMC的符元週期比OFDM更長，因此在時域上會有重疊的情況發生，這樣就會造成載波間干擾(Inter-Carrier Interference, ICI)和符元間干擾(Inter-Symbol Interference, ISI)，在FBMC/OQAM中使用等化器來降低ICI和ISI，解決在頻率選擇性衰減通道的多輸入多輸出系統調變所造成的干擾是很重要的。在本論文中，我們探討FBMC/OQAM在頻率選擇性多輸入多輸出系統下的最小均方誤差等化器，系統效能取決於等化器長度、符元重疊個數、頻率選擇性衰減通道的長度以及子載波的個數。模擬結果顯示了最小均方誤差等化器的影響以及與OFDM的頻譜的比較。

Compared with orthogonal frequency division multiplexing (OFDM) modulation, filter bank-based multicarrier (FBMC) modulation is recently developed to further condense the spectrum, thereby increasing the spectral efficiency. Unlike to OFDM, FBMC adopts offset quadrature amplitude modulation (OQAM) and the fractionally spaced per subcarrier is required. The OQAM-based FBMC is also called FBMC/ OQAM. Moreover, the symbol period of FBMC is greatly larger than that of OFDM and overlaps in time-domain, which causes the inter-carrier interference (ICI) and the inter-symbol interference (ISI). An equalization is necessary for the FBMC/OQAM to suppress the influence of ICI and IBI. The interference becomes noticeable as the modulation involved in the frequency selective fading channel in the multiple-input multiple-output (MIMO) systems. In this thesis, we study the minimum mean-squared error equalization for the FBMC/OQAM modulation in frequency selective MIMO systems. The performance is evaluated in terms of equalizer length, the numbers of overlapped symbols, the length of frequency selective fading channel, and the numbers of subcarriers. Simulation results demonstrate the effectiveness of the MMSE equalizer and show the remarkable spectral efficiency compare with the conventional OFDM modulation.

論文審定書 i
致謝 ii
中文摘要 iii
英文摘要 iv
目錄 v
圖次 vi
表次 vii
第1章 序言 1
第2章 系統模型 5
第2.1節 濾波器組多載波傳輸系統介紹 5
第2.2節 濾波器組多載波傳輸系統在單輸入單輸出的架構模型 6
第2.3節 濾波器組多載波傳輸系統在多輸入多輸出的架構模型 12
第3章 傳輸端不考慮通道資訊的多輸入多輸出濾波器組多載波系統 15
第3.1節 小尺度傳播模型介紹 15
第3.2節 頻率選擇性通道的多階等化器 16
第4章 系統模擬及探討 18
第5章 結論與未來展望 24
參考文獻 25

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