| 基于FFT-BP算法的多元域LDPC码译码器设计与FPGA实现 |
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| 引用本文： | 余瑜,林辉琛,李雪松,刘星成.基于FFT-BP算法的多元域LDPC码译码器设计与FPGA实现[J].电路与系统学报,2012(4):7-12. |
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| 作者姓名： | 余瑜 林辉琛 李雪松 刘星成 |
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| 作者单位： | 中山大学信息科学与技术学院 |
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| 基金项目： | 国家自然科学基金资助项目(Grant No.60970041,61173018) |
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| 摘 要： | GF(q)域上的LDPC码是二进制LDPC码的扩展,它具有比二进制LDPC码更好的纠错性能。FFT-BP算法是高效的LDPC码译码算法,本文在GF(4)域上探讨该算法的设计与实现。本文的创新之处在于,根据FFT-BP算法的特点设计了一种利用Tanner图进行信息索引的方式,简化了地址查询模块的设计。实验表明,在归一化信噪比为2.6dB时,译码器的误码率可达到10-6。
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| 关 键 词： | LDPC码 FFT-BP算法 多进制LDPC码译码器 |
Design and implementation of non-binary LDPC Decoders with FPGA based on FFT-BP algorithm |
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| YU yu,LIN Hui-chen,LI Xue-song,LIU Xing-cheng.Design and implementation of non-binary LDPC Decoders with FPGA based on FFT-BP algorithm[J].Journal of Circuits and Systems,2012(4):7-12. |
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| Authors: | YU yu LIN Hui-chen LI Xue-song LIU Xing-cheng |
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| Affiliation: | (School of Information Science and Technology,Sun Yat-sen University,Guangzhou 510006,China) |
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| Abstract: | Low Density Parity Check(LDPC) codes over GF(q) are an extension of binary LDPC codes.Performance of LDPC codes over GF(q) is better than binary LDPC codes.FFT-BP algorithm is an efficient decoding algorithm of LDPC codes.In this paper the design of GF(4) LDPC decoders based on the FFT-BP algorithm is explored.A new method of indexing messages with the aid of Tanner graph is proposed,which leads to a simplified electronic module design for decoder address access.Experiments show that the performance of the designed decoder at a normalized signal-to-noise ratio(SNR) of 2.6dB is 10-6 in terms of the Bit Error Rate(BER). |
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| Keywords: | LDPC codes FFT-BP algorithm non-binary LDPC codes decoder |
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