空時籬柵碼與空時塊狀碼在正交分頻多工系統之研究

Study of Space-Time trellis and block codes for OFDM Systems

彭國華(Guo-Hua Peng)

指導教授 ： 王瑞騰

國立暨南國際大學/科技學院/通訊工程研究所/碩士(2008年)

https://doi.org/10.6837/NCNU.2008.00142

摘要

多輸入多輸出（Multiple-Input Multiple-Output，MIMO）是一個使用多重天線在傳送端與接收端兩者的通訊技術，利用分集與多工通訊技術以提高可靠度與容量。另一方面，正交分頻多工（Orthogonal Frequency Division Multiplexing，OFDM）系統是劃分一個資料流成為數個子資料流的通訊技術，使用一個子通道去傳送一個子資料流，每個子通道模型能夠如同窄頻通道，以便減輕符元干擾影響。
在本篇論文中，我們結合MIMO與OFDM以獲取更好的效能，這個結合是實現空時籬柵碼與空時塊狀碼合併到OFDM系統，這個合成的系統稱作MIMO-OFDM系統，從電腦模擬結果顯示，我們發現MIMO-OFDM系統錯誤率方面勝過傳統單一天線收發的OFDM系統。

關鍵字

多輸入多輸出系統，正交分頻多工系統，空時碼

並列摘要

Multiple-Input Multiple-Output（MIMO）is a communication technique that employs multiple antennas at both the transmitter side and the receiver side，with this technique，the diversity and the multiplexing can be exploited so that the reliability and the capacity can be enhanced。On the other hand，orthogonal frequency division multiplexing（OFDM）is a communication technique that divides the data stream into multiple data substreams and uses one subchannel to transmit one data substream，with this technique，each subchannel can be modeled as a narrowband channel so that the inter-symbol interference effect can be alleviated。
In this thesis，we combine MIMO with OFDM to get better system performance. The combination is realized by incorporating the space-time trellis and block codes into the OFDM system，and the resultant system is called the MIMO-OFDM system。From the computer simulation results，we found that the MIMO-OFDM system significantly outperforms the traditional single-antenna OFDM system in the error rate。

並列關鍵字

Multiple-Input Multiple-Output（MIMO）system，Orthogonal Frequency Division Multiplexing（OFDM）system，Space-Time coding

參考文獻

參考文獻

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[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.