| 低复杂度伪码迭代捕获方法 |
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| 引用本文： | 王伟,踪念科,熊晔.低复杂度伪码迭代捕获方法[J].华中科技大学学报(自然科学版),2011(7):30-35. |
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| 作者姓名： | 王伟 踪念科 熊晔 |
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| 作者单位： | 哈尔滨工程大学自动化学院; |
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| 基金项目： | 国家自然科学基金资助项目(60704018) |
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| 摘 要： | 针对迭代消息传递的伪码捕获算法复杂度过高的问题,提出一种低复杂度伪码迭代捕获方法.将伪码迭代捕获方法分成迭代译码算法和向量选择算法2个步骤来讨论:首先,采用归一化简化方法对迭代译码算法进行改进,降低了算法的空间复杂度;其次,提出一种新的伪码向量选择算法,大大降低了算法的时间和空间复杂度.仿真结果显示:提出的伪码迭代捕获算法以低的复杂度,实现了较低信噪比下长伪码的快速捕获,且其捕获性能优于现有的伪码迭代捕获方法.
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| 关 键 词： | 长伪码快速捕获 迭代译码 迭代捕获算法 向量选择 算法复杂度 |
Iterative acquisition of PN code with low complexity |
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| Wang Wei Zong Nianke Xiong Ye.Iterative acquisition of PN code with low complexity[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2011(7):30-35. |
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| Authors: | Wang Wei Zong Nianke Xiong Ye |
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| Institution: | Wang Wei Zong Nianke Xiong Ye(College of Automation,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | As the pseudo noise(PN) code acquisition based on iterative message passing algorithm is very complicated,thus,a PN code acquisition with low algorithm complexity was proposed.The method was divided into two parts: iterative decode algorithm,and vector selecting algorithm.First,the iterative decode algorithm was improved by a normalization method to reduce the space complexity.Second,a new vector selecting algorithm was proposed,which could reduce the time and space complexity of the algorithms greatly.Simu... |
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| Keywords: | long PN code acquisition iterative decode iterative acquisition algorithm vector select algorithm complexity |
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