| 基于AR模型的直扩信号循环平稳特性的分析 |
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| 引用本文： | 蒋晓霞,汪立新,张静远.基于AR模型的直扩信号循环平稳特性的分析[J].计算机仿真,2009,26(2). |
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| 作者姓名： | 蒋晓霞 汪立新 张静远 |
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| 作者单位： | 1. 通信系统信息控制技术国家级重点实验室,浙江,嘉兴,314001;杭州电子科技大学通信工程学院,浙江,杭州,310018
2. 杭州电子科技大学通信工程学院,浙江,杭州,310018 |
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| 摘 要： | 在信号处理中,传统的功率谱分析方法包含的信息量少,谱相关方法较前者具有更多优点.而一般的谱相关估计方法均基于周期图方法,分辨率低,估计方差大,需要的数据样本长.提出了一种基于AR模型,结合谱相关的方法进行信号的循环谱估计,克服了周期图方法的缺点.给出了算法的大致流程和建模思想.应用此方法在低信噪比条件下,进行直扩信号的循环谱分析,载波频率估计和码片时宽的估计.计算机仿真验证了此方法的有效性.
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| 关 键 词： | 循环谱 模型 载频估计 码片时宽 |
DS/SS Analysis of Cyclostationary Characteristic Based on AR Model |
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| JIANG Xiao-xia,WANG Li-xin,ZHANG Jing-yuan.DS/SS Analysis of Cyclostationary Characteristic Based on AR Model[J].Computer Simulation,2009,26(2). |
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| Authors: | JIANG Xiao-xia WANG Li-xin ZHANG Jing-yuan |
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| Affiliation: | 1.National Laboratory of Information Control Technology for Communication System;Jiaxing Zhejiang 314001;China;2. College of Communication Engineering;Hangzhou Dianzi University;Hangzhou Zhejiang 310018;China |
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| Abstract: | In signal processing field,the spectrum correlative technology has more advantages than the conventional power spectrum method,because the latter includes less information. However,the general spectrum correlative method is based on periodiogram whose spectrum is of lower resolution,large estimation variance and needs too many sampling data. A novel approach of spectrum correlative theory based on AR model is proposed to overcome the disadvantages of periodiogram. The algorithmic process and the idea of mak... |
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| Keywords: | Cyclic spectrum Model Carrier frequency estimation Chip width |
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