| 摘要: |
| 空间耦合低密度奇偶校验（Spatially-Coupled Low-Density Parity-Check,SC-LDPC）码具有接近香农限性能，基于置信传播译码算法，窗口译码（Windowed Decoding,WD）能够获得较小延时的同时也存在一定的局限性。为了进一步提高WD的译码性能，对SC-LDPC码的窗口译码算法提出了提前终止译码和动态调整窗口大小相结合的改进方法。该方法监测窗口大小的动态变化及相应窗口的平均迭代次数，通过加性高斯白噪声信道下的仿真分析，与传统窗口译码相比，其误码率降低，且计算复杂度更低。 |
| 关键词: 低密度奇偶校验（LDPC）码 空间耦合LDPC码 置信传播 窗口译码 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(61401216),江苏高校优势学科Ⅱ期建设工程资助项目 |
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| Size-adaptive windowed decoding for spatially-coupled LDPC codes |
| ZHOU Hua,WANG Xue |
| (1.School of Electronic & Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;
2.Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology,Nanjing 210044,China;
3.Jiangsu Key Laboratory of Meteorological Observation and Information Processing,Nanjing 210044,China;1.School of Electronic & Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;
3.Jiangsu Key Laboratory of Meteorological Observation and Information Processing,Nanjing 210044,China) |
| Abstract: |
| The spatially-coupled low-density parity-check(SC-LDPC) codes have near-capacity limit performance,and small latency can be obtained by using belief propagation with certain limitations.In order to improve the decoding performance of windowed decoding(WD),a new mechanism for windowed decoding with premature termination and dynamic window size is proposed.The method monitors the dynamic change of the window size and the average number of iterations consumed by the corresponding window.Through the simulation analysis under the additive white Gaussian noise(AWGN) channel,the proposed method has lower bit error ratio(BER) and complexity compared with traditional WD method. |
| Key words: low-density parity-check(LDPC) codes spatially-coupled LDPC codes belief propagation windowed decoding |
