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一种基于变换域LMS的多用户检测算法
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作者 李群 郑翔 周志杰 《无线电通信技术》 2007年第5期14-16,31,共4页
LMS算法收敛速度由输入自相关矩阵特征值的发散程度决定,很多场合下收敛速度慢不能满足需求。变换域自正交LMS算法在变换域对输入信号做正交处理,使得输入自相关矩阵变成单位矩阵,能够有效地提高收敛速度。研究了基于变换域LMS的多用户... LMS算法收敛速度由输入自相关矩阵特征值的发散程度决定,很多场合下收敛速度慢不能满足需求。变换域自正交LMS算法在变换域对输入信号做正交处理,使得输入自相关矩阵变成单位矩阵,能够有效地提高收敛速度。研究了基于变换域LMS的多用户检测算法,仿真表明该算法能够提高多用户检测器的性能。 展开更多
关键词 变换域LMS算法 多用户检测 变换 自正交化
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Simulating an underwater vehicle self-correcting guidance system with Simulink 被引量:1
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作者 范辉 张宇文 李文哲 《Journal of Marine Science and Application》 2008年第3期205-211,共7页
Underwater vehicles have already adopted self-correcting directional guidance algorithms based on multi-beam self-guidance systems, not waiting for research to determine the most effective algorithms. The main challen... Underwater vehicles have already adopted self-correcting directional guidance algorithms based on multi-beam self-guidance systems, not waiting for research to determine the most effective algorithms. The main challenges facing research on these guidance systems have been effective modeling of the guidance algorithm and a means to analyze the simulation results. A simulation structure based on Simulink that dealt with both issues was proposed. Initially, a mathematical model of relative motion between the vehicle and the target was developed, which was then encapsulated as a subsystem. Next, steps for constructing a model of the self-correcting guidance algorithm based on the Stateflow module were examined in detail. Finally, a 3-D model of the vehicle and target was created in VRML, and by processing mathematical results, the model was shown moving in a visual environment. This process gives more intuitive results for analyzing the simulation. The results showed that the simulation structure performs well. The simulation program heavily used modularization and encapsulation, so has broad applicability to simulations of other dynamic systems. 展开更多
关键词 SIMULINK self-correcting ahead angle arithmetic vehicle acoustic homing system MODULARIZATION
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