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基于IRA码迭代译码器结构,文中研究了EXIT曲线图性能分析方法。利用此方法求出DVB-S2中各种码率IRA码的收敛门限值,并与高斯近似和密度进化方法求得的结果进行比较分析,探讨了EXIT曲线图的优点和应用技术。
Based on IRA code iterative decoder structure, this paper studies the performance analysis of EXIT curve. By using this method, the convergence thresholds of various code rate IRA codes in DVB-S2 are obtained and compared with those obtained by Gaussian approximation and density evolution method. The advantages and application techniques of EXIT graph are discussed.