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面向卫星导航系统的多进制LDPC码的构造 被引量：3

CONSTRUCTING NON-BINARY LDPC CODES FOR SATELLITE NAVIGATION SYSTEMS
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摘要 面向卫星导航系统应用,设计一种性能优越且编码复杂度低的多进制低密度奇偶校验(LDPC)码。结合渐进边增长(PEG)算法与准循环扩展的半随机构造法,并优化非零元素的选择,构造与新一代卫星导航系统IS-GPS-800接口标准中参数一致的多进制LDPC码。进一步,通过将校验矩阵转换为重复累加码(RA)码的校验矩阵结构,实现低复杂度编码。仿真结果表明,与卫星导航系统IS-GPS-800接口标准中码长码率相同的二进制LDPC码相比,多进制LDPC码有明显的编码增益,且其编码复杂度较低。 We designed a kind of non-binary low-density parity-check（ NB-LDPC） codes with superior performance and low encoding complexity for the application of satellite navigation systems. In our design,we constructed the NB-LDPC codes with same parameters as the binary LDPC codes in IS-GPS-800 interface standard of new generation satellite navigation system by combining the semi-random construction method based on progressive-edge-growth（ PEG） algorithm and quasi-cyclic expansion and optimising the non-zero elements selection. Furthermore,by converting parity-check matrix to the check matrix structure of repeat-accumulate（ RA） codes,we implemented the low complexity encoding. Simulation results demonstrated that,the designed NB-LDPC codes has noticeable encoding gain and lower encoding complexity compared with the binary LDPC codes in same code length and code rate in IS-GPS-800 interface standard of satellite navigation system.
作者 陈为刚 曹艳 夏晓晓 杨晋生
机构地区 天津大学电子信息工程学院
出处 《计算机应用与软件》 CSCD 2016年第4期108-110,115,共4页 Computer Applications and Software
基金 国家自然科学基金项目(61101114) 教育部新世纪优秀人才支持计划项目(NCET-12-0401) 天津市科技兴海项目(KJXH2011-2) 天津大学自主创新基金项目(60301002 60301014)
关键词 卫星导航系统 多进制低密度奇偶校验码 半随机构造法 Satellite navigation system Non-binary LDPC codes Semi-random construction method
分类号 TP911.2 [自动化与计算机技术]
  • 相关文献

参考文献10

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二级参考文献12

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计算机应用与软件
2016年 第4期

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