| 级联LDPC码的STBC-OFDM系统性能分析 |
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| 引用本文： | 张琨,赵光.级联LDPC码的STBC-OFDM系统性能分析[J].辽宁工学院学报,2009(4):225-226. |
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| 作者姓名： | 张琨 赵光 |
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| 作者单位： | 辽宁工业大学电子与信息工程学院,辽宁锦州121001 |
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| 摘 要： | 提出了一种级联低密度奇偶校验码（LDPC）的空时分组码一正交频分复用（STBC—OFDM）系统，给出了系统模型，详细阐述了STBC-OFDM系统的编译码算法，最后通过MATLAB对级联LDPC码的系统与不级联LDPC码的系统进行仿真比较，结果说明级联LDPC码的STBC—OFDM系统性能明显好于未级联信道外码的STBC—OFDM系统，在误码率为0．02时，获得约3．5dB的编码增益，且随着信噪比的增加，误码性能越来越好。
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| 关 键 词： | LDPC码 STBC OFDM |
Performance Analysis of STBC-OFDM System with Cascaded LDPC Coding |
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| ZHANG Kun,ZHAO Guang.Performance Analysis of STBC-OFDM System with Cascaded LDPC Coding[J].Journal of Liaoning Institute of Technology(Natural Science Edition),2009(4):225-226. |
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| Authors: | ZHANG Kun ZHAO Guang |
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| Affiliation: | (Electron ＆ Information Engineering College, Liaoning University of Technology, Jinzhou 121001, China) |
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| Abstract: | The STBC-OFDM system concatenated the Low Density Parity Check （LDPC） coding was proposed. The system model was constructed, the coding and decoding arithmetic of the STBC-OFDM system was described in detail. At last, the LDPC-STBC-OFDM system was simulated and compared with non-LDPC system by using MTALAB. The results expatiated that the STBC-OFDM system with cascaded LDPC coding had better performance than that of non-cascated LDPC, achieved a coding gain of 3.5 dB at BER=0.02 compared with the one of non-cascaded codes, and the BER performance got better and better as the SNR increased. |
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| Keywords: | LDPC codes space-time block codes OFDM |
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