Next-generation OFDMA-based passive optical network architecture supporting radio-over-fiber
Next-generation OFDMA-based passive optical network architecture supporting radio-over-fiber
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DOI：
10.1109/jsac.2010.100804
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发表时间：
2010-08
影响因子：
16.4
通讯作者：
Yu-Min Lin;P. Tien
中科院分区：
文献类型：
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作者：
Yu-Min Lin;P. Tien
在本文中，我们提出了一种新的架构，用于下一代基于正交频分多址（OFDMA）的无源光网络（PON），简称ROFPON。除了承载本地宽带OFDMA数据外，ROFPON还可以在不使用昂贵的WDM激光器的情况下，在中心办公室和终端用户的多个远程天线之间无缝地支持光纤无线电（RoF）传输。分析和实验研究了接收机对OFDMA信号的灵敏度和射频（RF）信号的性能。通过仿真结果与实验结果的验证，我们讨论了关键系统参数的确定，如最佳宽带无线电功率比，以及用于去除射频干扰的陷波滤波器的开发。实验结果表明，集成的10gb /s OFDMA和3个20mhz射频信号在一个20km的单模光纤PON上成功地上下行传输。最后，实验结果表明，qpsk编码的WiMAX格式射频信号在每个光网络单元（ONU）上进行E-O-E转换上行传输/中继，并在32个ONU级联后在光线路终端上无差错接收。
In this paper, we propose a novel architecture for next-generation orthogonal frequency division multiple access (OFDMA)-based passive optical networks (PON's), referred to as ROFPON. Besides carrying local broadband OFDMA data, ROFPON seamlessly supports radio-over-fiber (RoF) transports between the central office and multiple remote antennas at end users without using costly WDM lasers. We analytically and experimentally study the receiver sensitivity to OFDMA signals and the radio frequency (RF) signal's performance. By corroborating simulation results with experimental results, we discuss the determination of crucial system parameters, such as the optimal broadband-to-radio power ratio, and the exploitation of a notch filter for removing RF interference. Experimental results show that the integrated 10 Gb/s OFDMA and three 20 MHz RF signals are successfully transported both downstream and upstream over a 20 km single-mode-fiber PON. Finally, experimental results demonstrate that QPSK-encoded WiMAX format RF signals are transmitted/relayed upstream with E-O-E conversion at each optical network unit (ONU), and received error-free at the optical line terminal after cascading 32 ONU's.