在單載波區塊傳輸系統中結合時域波束成型和頻域等化之方法

Abstract

對於單載波區塊傳輸的時域波束成型和頻域等化共同設計問題，在這篇論文當中，我們提出一個有效的次最佳化演算法。因為波束成型的權重和等化器的係數可以被一起設計，我們所提出演算法的誤碼率相較於其他論文，有相當程度的下降。另外，因為接收端的波束成型是實作在前快速傅立葉轉換之前，我們提出的演算法相較於後快速傅立葉轉換波束成型有較低的計算複雜度。模擬結果顯示，我們提出的演算法可以在適當的次數下收斂。

A joint multiple-input multiple-output (MIMO) time domain beamforming and frequency domain equalization (FDE) method for single-carrier block transmission (SCBT) is formulated as an optimization problem and solved by an efficient suboptimal algorithm in this thesis. Because the beamforming weights and the equalizer coefficients are jointly designed, the BER performance of the proposed algorithm is much better than other algorithms in the literature [2,3,4,5,7,8]. Also because the beamforming at receiver is performed before the FFT operation, the proposed algorithm has much lower computation complexity than those post-FFT beamforming methods [2,3]. Our simulation results show that this algorithm converges within a reasonable number of iterations.