| 基于FPGA 的WIMAX LDPC码编译码器的设计 |
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| 引用本文： | 王秀敏,沈建明,张洋,付娟.基于FPGA 的WIMAX LDPC码编译码器的设计[J].浙江大学学报(理学版),2012,39(1):112-116. |
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| 作者姓名： | 王秀敏 沈建明 张洋 付娟 |
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| 作者单位： | 1. 中国计量学院信息工程学院,浙江杭州,310018
2. 杭州专用汽车有限责任公司,浙江杭州,310018 |
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| 基金项目： | 2009年国家质检总局科技计划项目(2009QK027);2010年浙江省科技计划优先主题重点工业项目(2010C11024);2010年杭州经济技术开发区产学研合作项目(201002) |
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| 摘 要： | 提出了一种适合于WIMAX标准的所有码长和码率LDPC码的编码器结构,充分利用了校验矩阵的特点降低硬件实现复杂度.设计了一种基于TDMP-NMS算法的码长码率均可配置的支持连续译码的LDPC码译码器,支持该标准中所有码长和码率LDPC码的译码,通过仿真得出了在保证译码器误码率性能前提下的最优量化比特位宽和各码率的最优归一化因子.采用一种新的适合于TDMP算法的动态迭代停止准则,结果表明,所采用的方案有效降低了译码器的资源消耗,提高了吞吐率.
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| 关 键 词： | wimax ldpc码编译码器 tdmp-nms 现场可编程逻辑门阵列 |
Design of WIMAX LDPC codec based on FPGA |
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| WANG Xiu-min
,
SHEN Jian-ming
,
ZHANG Yang
,
FU Juan.Design of WIMAX LDPC codec based on FPGA[J].Journal of Zhejiang University(Sciences Edition),2012,39(1):112-116. |
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| Authors: | WANG Xiu-min SHEN Jian-ming ZHANG Yang FU Juan |
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| Institution: | 1 (1.College of Information Engineering,China Jiliang University,Hangzhou 310018,China;2.Special Purpose Vehicle Co.,Ltd.Hangzhou,Hangzhou 310018,China) |
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| Abstract: | An encoder architecture suitable for all the code rate and code length LDPC in the WIMAX standard is proposed,which takes fully use of the characteristics of the parity matrix to reduce the hardware implementation complexity.A reconfigurable LDPC decoder which is based on TDMP-NMS algorithm and supports continuous decoding is designed.It can decode LDPC of any code rate and code length in the standard.The optimum quantitative bit width and normalization factor are found out by simulation.A new dynamic iteration stopping criterion which is suitable for TDMP based decoding algorithm is adopted.Result shows that the scheme proposed not only decreases the resource consumed but also increases the throughput of the decoder effectively. |
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| Keywords: | WIMAX LDPC codec TDMP-NMS FPGA |
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