| 基于EXIT图的LDPIDMA系统性能分析 |
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| 引用本文： | 应俊.基于EXIT图的LDPIDMA系统性能分析[J].重庆邮电大学学报(自然科学版),2008,20(5):542-544. |
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| 作者姓名： | 应俊 |
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| 作者单位： | 重庆邮电大学 通信与信息工程学院，重庆 400065 |
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| 基金项目： | 重庆市科技攻关项目（CSTC2008AC2107) |
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| 摘 要： | 交织多址接入(interleavedivision multipleaceess system，IDMA)技术是第四代移动通信的关键技术之一，为了使该系统更加接近多址接入的信道容量限，设计了一种基于LDPC码编码的交织多址接入(IDMA)系统。利用基于互信息的EXIT图工具，从信息论的角度对LDPC码应用于交织分多址系统的性能进行预测和分析。分析结果表明, LDPC码非常适合于IDMA系统，相比无编码系统而言，在AWGN信道下多用户的系统性能得到了明显的改善，同时也验证了EXIT图分析迭代系统性能的有效性。
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| 关 键 词： | 交织多址接入系统 多用户检测 互信息 EXIT图 |
| 收稿时间： | 2008/5/30 0:00:00 |
Performance analysis of LDPC-coded interleave-division multiple-access system based on EXIT chart |
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| YING Jun.Performance analysis of LDPC-coded interleave-division multiple-access system based on EXIT chart[J].Journal of Chongqing University of Posts and Telecommunications,2008,20(5):542-544. |
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| Authors: | YING Jun |
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| Institution: | College of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, P.R.China |
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| Abstract: | Interleave-division multiple-access system (IDMA) is one of the key technologies in the fourth generation of mobile telecommunication. For making this system closer to the multiple access channel capacity limits, an IDMA system based on LDPC codes was designed. Using the EXIT chart based on mutual information, the performance of LDPC-coded IDMA system was analyzed, and the results indicate that LDPC is suitable for IDMA system. Compared with no coding IDMA system, the system performance of multiuser in AWGN channel is improved evidently, and the validity of EXIT chart for IDMA iterative system was testified. |
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| Keywords: | interleave-division multiple-access system (IDMA) multi-user detection mutual information EXIT chart |
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