Remote Radar Based on Chaos Generation and Radio Over Fiber
Remote Radar Based on Chaos Generation and Radio Over Fiber
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DOI：
10.1109/jphot.2014.2352628
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发表时间：
2014-09
影响因子：
2.4
通讯作者：
Mingjiang Zhang;Yongning Ji;Yongning Zhang;Yuan-Yen Wu;Hang Xu;Weipeng Xu
中科院分区：
文献类型：
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作者：
Mingjiang Zhang;Yongning Ji;Yongning Zhang;Yuan-Yen Wu;Hang Xu;Weipeng Xu
提出了一种基于微波光子混沌信号产生和光纤分配的超宽带（UWB）雷达远程测距系统，并进行了实验验证。在该系统中，中心局采用光注入的光反馈半导体激光器产生光子超宽带混沌作为探测信号，两条单模光纤将光信号传输到远端天线监测终端，并将相应的回波信号返回中心局。在远端天线端，光子信号经快速光电探测器转换成微波混沌，由发射天线发射到目标，另一天线接收到的回波信号经调制激光二极管转换到光域。在中心局通过将回波信号与参考信号相关来实现目标测距。我们实验实现了8米的探测范围，为自由空间目标，24公里的远程距离后，并实现了3厘米的单目标和8厘米的双目标的测距分辨率。在另一个光纤链路分支与15公里的光纤传输，我们得到了2厘米的测距分辨率为一个单一的目标。
An ultrawideband (UWB) radar system for remote ranging based on microwave-photonic chaotic signal generation and fiber-optic distribution is proposed and demonstrated experimentally. In this system, an optical-feedback semiconductor laser with optical injection in the central office generates photonic UWB chaos as probing signal, and two single-mode fibers transport the optical signal to the remote antenna monitoring terminal and return the corresponding echoed signal back to the central office. In the remote antenna terminal, the photonic signal is transformed into microwave chaos by a fast photodetector and then launched to target by a transmitting antenna, and the echoed signal received by another antenna is converted into optical domain by modulating a laser diode. The target ranging is achieved at the central office by correlating the echoed signal with the reference signal. We experimentally realize a detection range of 8 m, for a free-space target, after 24-km remote distance, and achieve a ranging resolution of 3 cm for single target and 8 cm for double targets. In another fiber link branch with 15-km fiber transmission, we obtained the 2-cm ranging resolution for a single target.