本篇論文主要在研究現今的4G無線通訊MIMO-OFDM系統下設計出最佳的遞迴式偵測與解碼接收器( Optimal design of iterative Detection and Decoder receiver)，由Shannon 通道編碼定理可知，為了趨近最大通道容量，系統中所選用通道編碼技術便顯的格外重要，適當的通道編碼使能趨近於最大的通道容量，在此我們使用curve- fitting技術與EXIT chart (extrinsic information transfer chart)分析使選用的通道編碼趨近最大通道容量。在此主要研究現行主流偵測技術搭配上IRA(Irregular Repeat-Accumulate ) code在不同code rate(R)於MIMO-OFDM系統上，使用curve- fitting技術設計出IRA code的參數來逼近最大通道容量之研究。

This thesis is based on the architecture of 4G wireless communication for MIMO -OFDM system. From this architecture, we research that how to design the optimal of iterative detection and decoding system. Because of Shannon theorem we know that, it’s very important to select a suitable channel code for approaching maximum channel capacity. According to curve-fitting technology and EXIT chart (extrinsic information transfer chart) analysis, it operates the selected channel code close to maximum channel capacity. In this thesis, we focus on the popular detection technologies with IRA (Irregular Repeat-Accumulate ) code and curve-fitting technology in high code rate situation, and then we will get many parameters of IRA code in iterative detection and decoding system. Finally, these parameters of IRA code can more approach the maximum channel capacity.

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