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Proposta de equalizador cego baseado em algoritmos genéticos

机译:基于遗传算法的盲均衡器方案

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摘要

This paper proposes a convex optimization scheme based on linear programming andgenetic algorithms for the blind equalizers applied to digital communications systems.It arose from the growing need for improvements in communication systems in order totransmit as much information as possible in a physical environment reliably. The proposed scheme, ELC-GA (Blind Linear Equalizer Linear based on Genetic Algorithms), is characterized by performing blind adaptive channel equalization in fixed units of data, using a genetic algorithm as adaptive algorithm, whose objective function is a globally convergent constrained linear function. However, due to the random characteristicsof the signal modeled with intersymbol interference and additive white Gaussian noise, the used linear function now represents a stochastic linear programming. Accordingly, the use of genetic algorithms is particularly suitable for being able to get optimal solutions covering a considerable portion of the search space, which corresponds to the various stochastic scenarios. This work also describes the implementation details of the proposed scheme and the performed computational simulations. In the performance analysis, the ELC- GA results are compared to the results of one of the traditional blind equalization techniques, CMA,used as reference in this analysis. The results are shown and discussed under the appropriatemetric analysis. The conclusions of the study indicate the GA - ELC as a promising alternative to blindequalization due to its equalization performance, which reaches global convergence in a considerably smaller range of symbols than the technique used as reference.
机译:本文针对数字通信系统中的盲均衡器提出了一种基于线性规划和遗传算法的凸优化方案,这是由于对通信系统进行改进以在物理环境中可靠地传输尽可能多的信息的需求不断增长。提出的方案ELC-GA(基于遗传算法的线性盲均衡器)的特征在于,使用遗传算法作为自适应算法,以固定的数据单位执行盲自适应信道均衡,其目标函数是全局收敛约束线性函数。但是,由于使用符号间干扰和加性高斯白噪声建模的信号的随机特性,现在使用的线性函数表示随机线性规划。因此,遗传算法的使用特别适合于能够获得覆盖搜索空间相当一部分的最优解,这对应于各种随机情况。这项工作还描述了所提出的方案和所执行的计算仿真的实现细节。在性能分析中,将ELC-GA结果与传统盲均衡技术(CMA)之一的结果进行比较,该技术在本分析中用作参考。结果在适当的度量分析下显示和讨论。研究的结论表明,GA-ELC的均衡性能使其成为盲均衡的一种有前途的替代方案,与作为参考的技术相比,它在较小的符号范围内达到了全局收敛。

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