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《中国工程科学》 >> 2007年 第9卷 第6期

自适应最优相关间隔选择的多普勒频偏估计算法

1. 东南大学 移动通信国家重点实验室 , 南京  210096;

2. 东南大学 自动控制系 , 南京  210096

资助项目 :国家自然科学基金资助项目(60496311) 收稿日期: 2005-12-19 修回日期: 2006-05-09

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摘要

在信道自相关特性的多普勒频偏估计算法的基础上,分析了存在的估计性能不受信噪比和频偏变化 影响的最优相关间隔。利用该特性提出一种逐次缩小搜索范围的迭代(CIO,correlation唱interval optimized)算法,实 现对其搜索和最大多普勒频偏的估计。通过仿真证明理论分析的正确及算法的有效性。与传统基于相关估计算 法相比,该算法自适应于信噪比和频偏变化,估计性能基本上独立于信噪比和频偏的变化,实现多普勒频偏的 直接性能估计。

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