| 引用本文: | 王建辉,李井源,倪少杰,等.GPS L1C信号LDPC译码器设计.[J].国防科技大学学报,2013,35(1):65-69.[点击复制] |
| WANG Jianhui,LI Jingyuan,NI Shaojie,et al.LDPC decoder for GPS L1C signal[J].Journal of National University of Defense Technology,2013,35(1):65-69[点击复制] |
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| GPS L1C信号LDPC译码器设计 |
| 王建辉, 李井源, 倪少杰, 欧钢 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| GPS现代化中的L1C信号使用了LDPC码，以提高接收机的弱信号接收能力。L1C信号中使用的LDPC码没有循环或准循环结构，这为译码器设计带来了难度。为了降低译码器实现复杂度，在分析L1C信号LDPC码校验矩阵结构的基础上，通过对校验节点分类和改变变量节点更新方法，提出了一种低存储量和简化译码器控制逻辑的低复杂度译码器结构，并通过仿真验证了译码器译码结果的正确性。 |
| 关键词: GPS L1C信号 LDPC码 低复杂度译码器 |
| DOI： |
| 投稿日期：2011-12-07 |
| 基金项目:国家部委资助项目 |
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| LDPC decoder for GPS L1C signal |
| WANG Jianhui, LI Jingyuan, NI Shaojie, OU Gang |
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(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In GPS modernization, LDPC code is used in L1C signal to enhance the receivers’ performance in weak signal environments. The LDPC codes used in L1C signal do not have cyclic or quasi-cyclic structure, which increases the complexity of decoder. To reduce the implementation complexity of decoder, the structure of parity check matrix of the LDPC code used in GPS L1C signal was analyzed. Based on the analysis, a complexity- reduced decoder was presented. The presented decoder divides the check nodes into two groups and changes the variable nodes updating way, which can reduce the storage and simplify the control logic of the decoder. The decoding results of the presented decoder are validated by simulation. |
| Keywords: GPS L1C signal LDPC codes low complexity decoder |
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