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基于线性回归的UWB系统频偏估计算法
引用本文:方绍峡,金德鹏,苏厉,曾烈光. 基于线性回归的UWB系统频偏估计算法[J]. 数据采集与处理, 2012, 27(1): 101-104
作者姓名:方绍峡  金德鹏  苏厉  曾烈光
作者单位:清华大学电子工程系微波与数字通信国家重点实验室,北京,100084
基金项目:国家高新技术研究发展计划("八六三"计划),国家科技重大专项基金,国家自然科学基金
摘    要:提出了一种利用接收序列与本地PN序列的相关值辐角的线性回归来估计UWB系统载波频偏的方法,该算法将接收序列与本地PN作相关,利用辐角随时间的线性变化特性,将相关值辐角作线性回归估计频偏.仿真结果表明,与传统PN相关频偏估计算法相比,该算法性能稳定,在有效估计区间内估计精度不受频偏大小影响,抗多径能力强,在低信噪比仍有较高的估计精度.此外,此算法与系统同步使用相同的PN序列与相关计算结果,节约了系统资源,易于实现.

关 键 词:频偏估计  线性回归  PN序列  超宽带
收稿时间:2011-03-03
修稿时间:2011-04-07

A Novel Frequency Offset Estimation Algorithm Based on Linear Regression in UWB System
Fangshaoxi,Jindepeng,Suli and. A Novel Frequency Offset Estimation Algorithm Based on Linear Regression in UWB System[J]. Journal of Data Acquisition & Processing, 2012, 27(1): 101-104
Authors:Fangshaoxi  Jindepeng  Suli and
Affiliation:(State Key Laboratory on Microwave and Digital Communication,Electronical Engineering Department,Tsinghua University,Beijing,100084,China)
Abstract:A novel frequency offset estimation algorithm based on the linear regression is presented.The frequency offset estimation is converted to the estimation of argument increment which satisfys the linear relationship.The algorithm correlates the signal received with local pseudo noise(PN) sequences,and then calculates the frequency offset based on the linear regression of arguments of correlation results.Simulation results indicate that the algorithm has an advantage of accurate estimation over multi-path channels and excellent performance of channel noise suppression.The accuracy of the algorithm is not sensitive to the frequency offset in the effective range.Moreover,the algorithm reduces system resources by sharing the same PN sequence and correlation results with PN synchronization.Besides,it can be easily implemented.
Keywords:frequency offset estimation  linear regression  pseudo noise sequence  ultra-wideband
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