Stable Downlinks for Wideband Radio Frequencies in Distributed Noncooperative System
Stable Downlinks for Wideband Radio Frequencies in Distributed Noncooperative System
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DOI：
10.1109/jlt.2018.2829866
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发表时间：
2018-10
影响因子：
4.7
通讯作者：
Zhiyu Chen;Tao Zhou;Xin Zhong;Jingxian Liu;Maowen Wang;Jia Ye
中科院分区：
文献类型：
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作者：
Zhiyu Chen;Tao Zhou;Xin Zhong;Jingxian Liu;Maowen Wang;Jia Ye
提出了一种基于光开关扫描的宽带匿名微波信号在分布式非合作系统下行链路的稳定传输方案，并进行了实验验证。通过导频载波的往返传输，可以连续地获得由环境引起的光纤延迟变化，并可以通过控制可变光延迟线来消除。此外，在操作系统的辅助下，仅使用一个相位漂移校正单元就可以实现四个稳定的光下行链路，从而显著降低了系统成本增量。实验结果表明，通过0.5km的光纤，从4个不同的远端下行传输2和18GHz的目标信号，2小时相位起伏仅为3.6°和8.4°。此外，通道的稳定相位值可在−150°至150°范围内单独调整。
A stable downlink transmission scheme for wideband anonymous microwave signals in distributed noncooperative system has been proposed and experimentally demonstrated based on an optical switch (OS) scanning. With the round-trip transmission of a pilot carrier, the delay variation of fiber induced by environment is obtained continuously, and can be canceled by controlling variable optical delay line. Furthermore, assisted by an OS, four stable optical downlinks can be realized by employing only one phase drift correction unit, leading to the significant reduction of the system cost increment. Experimental results show that target signals at frequencies of 2 and 18 GHz have been downlink transferred from four different remote ends with the phase fluctuation of only 3.6° and 8.4° at 2 hours through 0.5-km fiber. In addition, the stable phase value for channel can be adjusted from −150° to 150° individually.