| OFDM系统中同步算法的FPGA 实现 |
| |
| 引用本文： | 赵冠男,刘军民,魏东兴,王建国,国炜.OFDM系统中同步算法的FPGA 实现[J].无线电通信技术,2006,32(1):45-47,58. |
| |
| 作者姓名： | 赵冠男 刘军民 魏东兴 王建国 国炜 |
| |
| 作者单位： | 大连理工大学电子与信息工程学院,辽宁,大连,116024 |
| |
| 摘 要： | 给出了一种用于 OFDM 系统中可同时完成帧起始位置估计和载波频偏估计／补偿的同步算法及其 FPGA 实现方法。采用量化的方法对该不需要额外同步序列的估计算法进行了改进,提高了载波频偏的估计精度,并在数字域进行了频偏校正。在硬件实现上,利用 CORDIC 算法能够有效计算三角函数的特点,把频偏估计和频偏校正过程中的反正切运算和角度旋转操作转化成加法和移位操作,实现了计算精度、运算速度和硬件资源利用三方面性能的兼顾。
|
| 关 键 词： | OFDM 载波频偏估计/补偿 FPGA |
| 文章编号： | 1003-31104（2006）01-45-3 |
| 收稿时间： | 2005-01-07 |
| 修稿时间： | 2005-01-07 |
FPGA implementations of synchronization algorithm for OFDM system |
| |
| ZHAO Guan-nan,LIU Jun-min,WEI Dong-xing,WANG Jian-guo,GUO Wei.FPGA implementations of synchronization algorithm for OFDM system[J].Radio Communications Technology,2006,32(1):45-47,58. |
| |
| Authors: | ZHAO Guan-nan LIU Jun-min WEI Dong-xing WANG Jian-guo GUO Wei |
| |
| Affiliation: | College of Electronic and Information Engineer, Dalian University of Technology, Dalian Liaoning 116024, China |
| |
| Abstract: | An algorithm for OFDM system,that can locate the frame location and estimate/compensate carrier frequency offset simultaneously,and FPGA implementations are presented.In this paper,by quantification method,the estimation algorithm that do not need synchronization symbols is improved.The estimation precision of carrier frequency offset is improved and the frequency offset is corrected in digital domain.By utilizing CORDIC algorithm that is an efficient scheme for computing trigonometric functions,arotangent operation and angle rotation in frequency offset estimation and compensation are converted to only add and shift operations.The proposed method can achieve a good compromise between calculation precision,speed and hardware resource utility. |
| |
| Keywords: | OFDM earrier frequency offset estimation/compensation FPGA |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
