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| 一种基于多带OFDM-UWB的多址技术 | |
| 引用本文： | 张士兵,包志华,张力军.一种基于多带OFDM-UWB的多址技术[J].南京邮电大学学报(自然科学版),2006,26(2):34-38. |
| 作者姓名： | 张士兵 包志华 张力军 |
| 作者单位： | 1. 南通大学,电子信息学院,江苏,南通,226007;南京邮电大学,通信与信息工程学院,江苏,南京,210003 2. 南通大学,电子信息学院,江苏,南通,226007 3. 南京邮电大学,通信与信息工程学院,江苏,南京,210003 |
| 基金项目： | 国家科技攻关项目;江苏省高校自然科学基金 |
| 摘 要： | 选择适当的多址技术实现高客量、多用户无线接入，是UWB技术应用于无线短距离传输领域成功与否的关键技术之一。根据多带OFDM-UWB信号特点，提出了基于二级调制的OFDMA多址技术，其中第一级采用扩频技术，第二级采用跳频技术。通过多载波码分多址与跳频多址相结合，构成了一种新颖的多址接入技术——正交频分多址接入技术，实现了多载波码分多址技术和跳频多址技术的优势互补；利用基于余数域的两级跳频图样，减少了多用户间的干扰，提高了系统容量。仿真结果表明，基于这种多址技术的UWB通信系统在信噪比上优于常规系统5dB左右。 |
| 关 键 词： | 超宽带 多址接入 扩频 跳频 |
| 文章编号： | 1673-5439（2006）02-0034-05 |
| 收稿时间： | 2005-11-10 |
| 修稿时间： | 2005年11月10 |
Multiple Access Based on Multi-Band OFDM-UWB System |
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| ZHANG Shi-bing,BAO Zhi-hua,ZHANG Li-jun.Multiple Access Based on Multi-Band OFDM-UWB System[J].Journal of Nanjing University of Posts and Telecommunications,2006,26(2):34-38. | |
| Authors: | ZHANG Shi-bing BAO Zhi-hua ZHANG Li-jun |
| Institution: | 1. School of Electronics and Information, Nantong University, Nantong 226007, China; 2. College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
| Abstract: | Choosing a suitable multiple access method is one of the keys to implement higher capacity transmission and apply UWB to short range wireless data applications.From the characteristics of multi-band OFDM-UWB signal,an Orthogonal Frequency Division Multiple Access(OFDMA) was proposed,where the multiple access was implemented by spreading and frequency-hopping.It combined Multi-Carrier Code Division Multiple Access(MC-CDMA) with Frequency Hopping Multiple Access(FHMA) and formed a novel multiple access technique.This benefit of the advantages of MC-CDMA and FHMA,reduced the inter-user interference and increased the system capacity by using the FH patterns based on Residue Number System(RNS).Simulation results show that the OFDMA has the advantages over the conventional multiple access about 5 dB in signal-to-noise ratio. |
| Keywords: | UWB Multiple access Spreading Frequency hopping |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |