| 时频联合处理抑制OFDM系统子载波间干扰 |
| |
| 引用本文： | 陈微微,黄学军,朱洪波.时频联合处理抑制OFDM系统子载波间干扰[J].南京邮电大学学报(自然科学版),2012,32(2):19-23. |
| |
| 作者姓名： | 陈微微 黄学军 朱洪波 |
| |
| 作者单位： | 南京邮电大学通信与信息工程学院,江苏南京,210003 |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划)(2007CB310600);江苏省博士后基金(0902026C)资助项目 |
| |
| 摘 要： | 针对OFDM系统对频率偏移的敏感性,采用时频联合处理的方法,结合频域部分响应和时域加窗,减小子载波频域拖尾。采用载波干扰比(CIR)来分析时频联合处理对子载波间干扰(ICI)的影响,并且推导多子载波频域部分响应的加权系数。计算机仿真表明,只要选择适当的部分响应方式和窗形,就能加快信号频谱旁瓣衰落,从而提高CIR,改善系统的误比特率。并且,参与部分响应子载波数越多,系统性能越好。
|
| 关 键 词： | OFDM 频率偏移 子载波间干扰 部分响应 加窗 |
Reduction of Inter-Carrier Interference in OFDM System by Time-frequency Domain Signal Processing |
| |
| CHEN Wei-wei
,
HUANG Xue-jun
,
ZHU Hong-bo.Reduction of Inter-Carrier Interference in OFDM System by Time-frequency Domain Signal Processing[J].Journal of Nanjing University of Posts and Telecommunications,2012,32(2):19-23. |
| |
| Authors: | CHEN Wei-wei HUANG Xue-jun ZHU Hong-bo |
| |
| Institution: | College of Telecommunication & Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China |
| |
| Abstract: | In order to reduce the sensitivity to frequency offset in OFDM system,this paper proposes a joint time-frequency scheme,in which frequency-domain partial response coding(PRC) and time-domain windowing technologies are combined to shape the system spectrum.The performance of the carrier-to-interference power ratio(CIR) is analyzed and the optimum weights for PRC are derived.Simulation results show that the proposed scheme accelerates the decline of the spectrum tails,and increases the CIR power,therefore improves the error bits ratio performance.Moreover,the more sub-carriers used in PRC,the better system performance achieved. |
| |
| Keywords: | OFDM frequency offset Inter-Carrier Interference partial response coding windowing |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
