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zqh4659金虫 (小有名气)
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[求助]
中翻英，求大神！
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本文在介绍空间通信系统咨询委员会(CCSDS)深空标准LDPC码的基础上，通过对置信传播算法的优化，提出了一种低复杂度的LDPC译码器结构。该结构通过改进的译码算法，充分利用准循环结构，降低了译码器中变量及校验节点索引位置所占存储单元的使用量，大为减少了硬件资源。而且，译码器的校验节点更新采用JPL-LDPC 译码器的消息迭代结构，降低了计算复杂度。通过改进查找方式，可降低计算复杂度和FPGA实现的难度。译码性能可接近浮点BP算法性能，能广泛应用于适合低信噪比传输的深空通信领域。 This article is based on the introductory space communications system Advisory Committee (CCSDS) deep space standard LDPC codes, proposed a low- complexity LDPC decoder structure through optimization of the belief propagation algorithm. Through use of decoding algorithm and the quasi-cyclic structure, reducing the index position of the variable and check nodes in the decoder's share of the amount of use of the storage unit, greatly reducing the hardware resources. Furthermore, the check nodes update using messages iterative structure of the JPL-LDPC decoder can reduces the computational complexity. Through improving search methods, reduce the computational complexity and the difficulty of FPGA implementation. Decoding performance of the decoder is close to a floating-point BP algorithm. It can be widely used in deep space communications suitable for low signal-to-noise ratio communication. 中翻英，求大神修改，谢谢了！ |
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phu_grassman
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zqh4659: 金币+5, 翻译EPI+1, ★★★★★最佳答案, 多谢了！还是版主大人。。。哈哈 2013-12-04 10:40:43
zqh4659: 金币+5, 翻译EPI+1, ★★★★★最佳答案, 多谢了！还是版主大人。。。哈哈 2013-12-04 10:40:43
| In this paper, a low-complexity LDPC decoder structure was proposed by optimizing the confidence propagation algorithm based on the deep space standard LDPC codes developed by the Consultative Committee for Space Data Systems (CCSDS). With the improved decoding algorithm, the structure made full use of the quasi-cyclic structure to reduce the variables in the decoder and the storage unit use for the index position of the check nodes, which saves the hardware resources greatly. Furthermore, the updating of the check nodes takes advantages of the information iterative structure of the JPL-LDPC decoder, which can reduce the computational complexity. By improving the searching methods, the computational complexity and the difficulty in FPGA implementation were reduced. The decoding performance of the decoder is close to that of the floating-point BP algorithm, which can be widely used in deep space communication with low signal-to-noise ratio. |
2楼2013-12-04 10:08:59