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中文摘要：
基于因子图与和积算法,给出了基于LDPC的FG-Turbo多用户检测扩展模型,仿真比较了最优MAP算法和软干扰消除算法的性能,并提出了一种基于敏感比特的软干扰估计新方法。仿真结果表明,改进后的软干扰消除算法在复杂度不变的情况下,有效地改善了系统性能。
英文摘要：
In this paper,based on the factor graph and sum-product algorithm,we get the extend model of FG-Turbo multiuser detection with LDPC coded,simulate and compare the performances of MAP algorithm and soft interference cancellation algorithm,and propose a new method to estimate interference symbols,that is based on sensitive bits algorithm.Simulation results show that in the case of the computational complexity unchanged,the soft interference cancellation algorithm modified can improve the performance of system effectively.
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