| OFDM系统的频偏估计算法 |
| |
| 引用本文： | 吉磊,李玉柏.OFDM系统的频偏估计算法[J].计算机应用研究,2011,28(4):1479-1480. |
| |
| 作者姓名： | 吉磊 李玉柏 |
| |
| 作者单位： | 电子科技大学,通信与信息工程学院,成都,611731 |
| |
| 摘 要： | 载波频偏会破坏正交频分复用系统(OFDM)各个子载波间的正交性，造成载波间干扰(ICI)和符号间干扰(ISI)。本文结合中国移动多媒体广播(CMMB)1]信道的帧结构和调制方式，利用不同数据码元间共轭相乘的算法来完成整数倍频偏(IFO)的捕获。最后采用最小二乘估计法捕获采样频偏和残余频偏。计算机仿真验证了算法能准确的完成频偏估计。
|
| 关 键 词： | 正交频分复用 中国移动多媒体广播 频率同步 整数倍频偏 残余频偏 |
| 收稿时间： | 2010/9/18 0:00:00 |
| 修稿时间： | 3/15/2011 4:48:22 PM |
Frequency offset estimation algorithm of OFDM system |
| |
| JI Lei,LI Yu-bai.Frequency offset estimation algorithm of OFDM system[J].Application Research of Computers,2011,28(4):1479-1480. |
| |
| Authors: | JI Lei LI Yu-bai |
| |
| Affiliation: | (School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China) |
| |
| Abstract: | Carrier frequency offset will destroy the orthogonality among every subcarrier of orthogonal frequency division multiplexing (OFDM) system, and bring interchannel interference (ICI) and intersymbol interference (ISI). Combining with the frame structure of China mobile multimedia broadcasting CMMB1], this essay introduces an integer frequency offset (IFO) acquiring algorithm using conjugate multiplication between adjacent symbols. At last, a least-squares approximation algorithm is introduced to acquire the sampling frequency offset and the residual frequency offset. The computer simulation proves that least-squares approximation can get precise results. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《计算机应用研究》浏览原始摘要信息 |
|
点击此处可从《计算机应用研究》下载全文 |
|
