摘要
IRA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,根据最小均方误差准则,提出一种改进型IRA译码算法。仿真结果表明,与BP译码算法相比,改进型IRA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IRA译码算法的复杂度几乎不变,但译码性能得到了明显地提高。
BP decoding algorithm is usually used to realize decoding of IRA 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.According to minimum mean square error rule,a modified IRA decoding algorithm is proposed in order to have a good tradeoff between complexity and decoding performance.The simulation results show that,compared with BP decoding algorithm,the modified IRA decoding algorithm can decrease algorithm complexity and keep good decoding performance.Compared with minimum-sum decoding algorithm,the complexity of the modified IRA decoding algorithm is almost unchanged,but the decoding performance improves significantly.
出处
《长春工业大学学报》
CAS
2010年第1期42-47,共6页
Journal of Changchun University of Technology
关键词
不规则重复累积码
置信传播译码算法
最小和译码算法
最小均方误差准则
irregular repeat accumulate codes
belief propagation decoding algorithm
minimum-sum decoding algorithm
minimum mean square error rule.
