光纤无线电mmWave天线波束形成中多芯光纤偏斜效应的补偿
Compensation of Multicore Fiber Skew Effects for Radio over Fiber mmWave Antenna Beamforming
摘要：
在5G网络中，可以采用利用多芯光纤的光纤无线电架构来传输馈送相控阵天线的毫米波信号。毫米波信号经历由光学真实时间延迟网络施加的相移，以提供无斜视波束。多芯光纤用于传输相移光信号。然而，这些光纤的芯间静态偏斜如果不被补偿，则使辐射图案失真。我们提出了一种有效的方法来补偿差分延迟，而不完全均衡的传输路径长度，降低功耗和复杂度。统计分析表明，无论偏斜分布，频率响应可以估计相对于均方根偏斜延迟。对完整的光纤无线电和射频链路的仿真分析验证了该方法。
英文摘要：
In 5G networks, a Radio over Fiber architecture utilizing multicore fibers can be adopted for the transmission of mmwave signals feeding phased array antennas. The mmwave signals undergo phase shifts imposed by optical true time delay networks, to provide squint free beams. Multicore fibers are used to transfer the phase shifted optical signals. However, the intercore static skew of these fibers, if not compensated, distorts the radiation pattern. We propose an efficient method to compensate the differential delays, without full equalization of the transmission path lengths, reducing the power loss and complexity. Statistical analysis shows that regardless of the skew distribution, the frequency response can be estimated with respect to the rms skew delays. Simulation analysis of the complete Radio over Fiber and RF link validates the method.
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