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WCDMA小区搜索过程中频偏估计的研究

发表时间:2010-11-30  浏览量:1709  下载量:688
全部作者: 郭瑾
作者单位: 北京邮电大学信息与通信工程学院
摘 要: 概述性地描述了宽带码分多址(wideband code division multiple access,WCDMA)系统小区的搜索过程。在WCDMA系统初始小区搜索过程中,对廉价晶体振荡器引起的频率偏移进行了深入研究。主要介绍了基于快速傅氏变换(fast Fourier transform, FFT)算法和在频域内二次插值的频偏估计算法,之后进行Matlab/C仿真、对仿真曲线进行深入的理论分析。结果表明:该算法不仅可以有效地提高频偏估计的精度,而且估计的频率偏移值具有很高的可靠性和良好的稳定性,因此该算法是可行的。
关 键 词: 无线通信技术;宽带码分多址;同步;小区搜索;频偏估计
Title: Study of frequency offset estimation in the progress of cell search in WCDMA system
Author: GUO Jin
Organization: School of Information and Communication Engineering, Beijing University of Posts and Telecommunications
Abstract: In wideband code division multiple access (WCDMA) system, frequency offset introduced by the cheap crystal oscillator in initial cell search is studied in detail. In view of it, the algorithm based on the fast Fourier transform (FFT) techniques with quadratic interpolation in the frequency domain is mainly presented. After that, the Matlab/C simulation is carried on and the simulation curves are deeply analyzed. It indicates that this algorithm can not only enhance the resolution of frequency offset estimation, but also the estimated frequency offset has high reliability and excellent stability. So this algorithm is feasible.
Key words: wireless communication technolgy; wideband code division multiple access; synchronization; cell search; frequency offset estimation
发表期数: 2010年11月第22期
引用格式: 郭瑾. WCDMA小区搜索过程中频偏估计的研究[J]. 中国科技论文在线精品论文,2010,3(22):2347-2353.
 
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