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  • 學位論文

多重輸入多重輸出接收端及傳送端天線選擇整合之研究

Study of Receiver and Transmit Selection-Combining Schemes for MIMO Systems

指導教授 : 王瑞騰
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摘要


在多重輸入多重輸出系統,使用天線選擇整合可以改善空時區塊碼(Space-Time block code,STBC)的表現,因此本篇論文的三個研究主題將圍繞在空時區塊碼下使用選擇整合;第一個研究主題中,我們研究部分選擇整合(Selection combining,SC)技術的選擇機制,並且可以發現這選擇整合的選擇機制能夠改善系統的表現或者更容易實現。第二個研究主題中,我們將結合傳送端天線選擇和選擇整合,在模擬結果發現將接收端天線選擇和傳送端天線選擇結合可以使得位元錯誤率(bit error rate,BER)的表現更好。選擇整合技術需要知道通道的情報,因此在第三個研究主題中我們將探討選擇整合技術中的通道估測(Channel estimation),模擬結果中可以發現通道情報準確度影響著選擇整合技術的表現。

並列摘要


In the MIMO system, using the selection combining technique can improve the performance of the STBC scheme. Therefore, the three research topics of this thesis are all related to the STBC scheme with selection combining. In the first research topic of this thesis, we study several selection criteria for the selection combining technique. We found that these selection criteria can result in the further performance improvements or can simplify the implementations. The second research topic of this thesis incorporates the transmit antenna selection into the selection combining technique. Simulation results show that such an integration of the receive antenna selection and the transmit antenna selection can further reduce the bit error probability. The selection combining technique needs to know the channel information, thus the third research topic of this thesis deals with the channel estimation for the selection combining technique. We found from simulation results that the accuracy of the channel information can affect the performance of the selection combining technique.

參考文獻


參考文獻
[1] S. M. Alamouti, “A simple transmitter diversity scheme for wireless communications,
” IEEE J. Select. Areas Commun., vol. 16,pp.1451-1458, Oct.1998.
[2] Tarokh V.,Jafarkhani H., and Calderbank A.R., “Space-Time block codes from orthogonal designs,” IEEE Trans. Inform. Theory,vol.45,pp.1456-1457,Jul.1999.
[3] Tarokh V.,Jafarkhani H., and Calderbank A.R., “Space-Time block coding for wireless communications : performance results ,”IEEE J. Select. Areas Commun., vol.17,pp.451-460,Mar.1999.

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