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由里德-所罗门码(RS码)和递归系统卷积码(RSC)组成的级联码被广泛应用于现有的通信系统中,如卫星通信系统和WiMAX系统.介绍了一种用于这类级联码的低复杂度迭代软判决译码算法.通过减少测试图样的使用数量,对chase-2型算法进行了简化,达到了减少运算复杂度的目的;此外,通过改进内外码解码器之间软信息的处理方法,增加了软信息的使用效率,改善了译码性能.仿真结果表明,改进型译码算法在性能和计算复杂度上取得了良好的平衡.
A concatenated code consisting of a Reed-Solomon code (RS-code) and a recursive systematic convolutional code (RSC) is widely used in existing communication systems such as satellite communication system and WiMAX system, Low complexity Iterative soft decision decoding algorithm of class concatenated code.The chase-2 algorithm is simplified by reducing the number of test patterns used to achieve the purpose of reducing the computational complexity; In addition, by improving the internal and external code decoder , Which improves the using efficiency of soft information and improves the decoding performance.The simulation results show that the improved decoding algorithm achieves a good balance between performance and computational complexity.