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支持动态带宽分配的40 Gb/s OFDMA-PON新型系统研究
发表时间：2011-11-30 浏览量：1488 下载量：411
| 全部作者： | 赵铂，陈雪 |
| 作者单位： | 北京邮电大学信息光子学与光通信研究院，信息光子学与光通信国家重点实验室 |
| 摘 要： | 提出一种新型的正交频分多址接入-无源光网络（orthogonal frequency division multiple access-passive optical network, OFDMA-PON）系统，该系统支持数据在最大传输距离为20 km的单模光纤中传输，传输比特率可达到40 Gb/s. 该系统使用马赫曾德调制器（Mach-Zehnder modulator，MZM），将电信号转化为光信号；使用光边带滤波器滤除一半的信号后进行单边带信号传输，降低色散对信号的影响，使得接收端可以恢复出信号；使用直接检测技术降低接收机的成本，在满足数据传输的条件下，同时满足PON系统对成本的需求。该系统支持动态的带宽分配，可以按照子载波的分配方式为光网络单元（optical network unit，ONU）分配带宽，子载波数目可以根据ONU的不同业务量进行非均匀分配，带宽分配方式非常灵活。通过搭建仿真模型并进行仿真验证，得出在比特误差率（bit erro rate，BER）为10e-3的情况下接收机灵敏度可以达到-20 dBm. |
| 关 键 词： | 光纤通信技术；无源光网络；正交频分复用多址接入；直接检测；动态带宽分配；40 Gb/s |
| Title： | A novel 40 Gb/s OFDMA-PON architecture which supports dynamic bandwidth allocation |
| Author： | ZHAO Bo, CHEN Xue |
| Organization： | Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications |
| Abstract： | The paper has proposed a novel orthogonal frequency division multiple access-passive optical network (OFDMA-PON) architecture that can reach 40 Gb/s over 20Km SSMF. The system uses Mach-Zehnder modulator (MZM) to transform electrical signals into optical signals. Single side-band filter is used to filter out half of the signal, thereby the influence of the dispersion is reduces, the receiver easily restores the signal. Direct detection technology is used at the receiver to reduce the cost and to meet the cost requirement of PON system. The system supports dynamic bandwidth allocation, different subcarriers can be allocated to different optical network units (ONUs), and the number of subcarriers allocated to each ONU can be differently according to the amount of tasks running on the ONU, the way of bandwidth allocation is very flexible. Through building the simulation model and simulation validation, it is concluded that under the condition of BER less than 10e-3 the receiver’s sensitivity can reach to -20 dBm. |
| Key words： | fibre optical communication technology; passive optical network; orthogonal frequency division multiple access; direct-detection; dynamic bandwidth allocation; 40 Gb/s |
| 发表期数： | 2011年11月第22期 |
| 引用格式： | 赵铂，陈雪. 支持动态带宽分配的40 Gb/s OFDMA-PON新型系统研究[J]. 中国科技论文在线精品论文，2011，4（22）：2089-2093. |
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