| 基于偏移量近似的改进型RA译码算法研究 |
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| 引用本文： | 张天瑜. 基于偏移量近似的改进型RA译码算法研究[J]. 吉林工学院学报, 2009, 30(4): 390-395 |
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| 作者姓名： | 张天瑜 |
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| 作者单位： | 无锡市广播电视大学,机电工程系,江苏,无锡,214011 |
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| 摘 要： | RA码的译码通常是利用BP译码算法来实现的,但是BP译码算法的硬件电路复杂。虽然最小和译码算法能够简化BP译码算法,但它是以牺牲性能为代价的。为了让译码算法在复杂度和译码性能之间取得较好的折衷,提出一种改进型RA译码算法。该算法采用偏移量近似的方法来逼近于BP译码算法,能够降低BP译码算法的复杂度。仿真结果表明,与BP译码算法相比,改进型RA译码算法能够在降低算法复杂度的同时保持良好的译码性能,与最小和译码算法相比,改进型RA译码算法的复杂度几乎不变,但译码性能得到了明显的提高。
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| 关 键 词： | 重复累积码 Tanner图 置信传播译码算法 最小和译码算法 偏移量近似 改进型RA译码算法 |
Research of modified RA decoding algorithm based on offset approximation |
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| ZHANG Tian-yu. Research of modified RA decoding algorithm based on offset approximation[J]. Journal of Jilin Institute of Technology, 2009, 30(4): 390-395 |
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| Authors: | ZHANG Tian-yu |
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| Affiliation: | Department of Mechanical and Electrical Engineering;Wuxi Radio & Television University;Wuxi 214011;China |
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| Abstract: | BP decoding algorithm is usually used to realize decoding of RA codes,but the hardware circuit of BP decoding algorithm is complicated.Minimum-sum decoding algorithm can simplify BP decoding algorithm,but it is achieved by sacrificing performance.A modified RA decoding algorithm is proposed in order to have a good tradeoff between complexity and decoding performance.The proposed algorithm is approximate to BP decoding algorithm by the method of offset approximation,which can decrease the complexity of BP de... |
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| Keywords: | RA codes Tanner graph BP decoding algorithm minimum-sum decoding algorithm offset approximation modified RA decoding algorithm. |
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