Computer Engineering and Applications ›› 2018, Vol. 54 ›› Issue (18): 110-114.DOI: 10.3778/j.issn.1002-8331.1705-0234

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Simulation of cosine cost function based T/4 fractionally spaced blind equalization algorithm based on Simulink

CUI Pengpeng, HAN Yingge, LI Baokun, WANG Chao   

  1. College of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
  • Online:2018-09-15 Published:2018-10-16


崔鹏鹏,韩迎鸽,李保坤,王  超   

  1. 安徽理工大学 电气与信息工程学院,安徽 淮南 232001

Abstract: On the basis of the research and analysis of T/4 fractionally spaced equalizer based on constant modulus algorithm(T/4-FSE-CMA), for non-constant modulous QAM signals, a T/4 Fractionally Spaced blind Equalization algorithm based on Cosine Cost Function(T/4-FSE-CCF) is proposed. The cost function of CMA is replaced by cosine cost function in the proposed algorithm. The new algorithm gets rid of the dependence on statistical Modulus value [R] compared with CMA, and when the equalizer is ideal balanced, the steady-state Mean Square Error(MSE) of the algorithm is zero. The performance of the proposed T/4-FSE-CCF is simulated by [M] file of MATLAB. After the optimum performance parameters of proposed T/4-FSE-CCF are obtained, the Simulink model of the T/4-FSE-CCF can be established.

Key words: constant modulous algorithm, fractionally-spaced, cosine cost function, error function, Simulink

摘要: 在对T/4-FSE-CMA算法研究分析的基础上,针对非常模QAM信号,提出了一种基于余弦代价函数T/4分数间隔盲均衡算法(T/4-FSE-CCF)。该算法将CMA的代价函数用构造的余弦代价函数来替代;新算法摆脱了CMA对统计模值[R]的依赖,且均衡器理想均衡时该算法的的稳态均方误差(Mean Square Error,MSE)为零。通过MAT-LAB的[M]文件对T/4-FSE-CCF的性能进行验证,在获得算法最佳性能时的参数值后,进一步由这些参数搭建了T/4-FSE-CCF的Simulink仿真模型。

关键词: 常模算法, 分数间隔, 余弦代价函数, 误差函数, Simulink