What we believe to be a novel reconfigurable multi-channel microwave photonic (MWP) receiver for multi-band RF signal is demonstrated for the first time, to the best of our knowledge. A reconfigurable MWP signal processing chip based on two cascaded microring filter banks is employed in the proposed receiver, which slices the multi-band RF input into several narrow band signals and selects optical frequency comb lines for frequency converting of each channel. Due to the significant reconfigurability of the signal processing chip, the proposed receiver can flexibly choose the output frequency band of each channel, and thus different frequency components of the multi-band RF input can be down converted to the intermediate frequency (IF) band for receiving or converted to other frequency band for forwarding. A multi-band RF signal composed of a linear frequency modulation (LFM) signal with 2 GHz bandwidth and a quad-phase shift keyed (QPSK) signal with 100 Mbit/s rate is experimentally received and reconstructed by the proposed receiver, where the reconstructed LFM component exhibits a signal to noise ratio (SNR) of 10.2 dB, and the reconstructed QPSK component reaches a high SNR of 26.1 dB and a great error vector magnitude (EVM) of 11.73%. On the other hand, the QPSK component of the multi-band RF signal centered at 13.5 GHz is successfully converted to 3.1 GHz.

中文翻译：

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基于级联微环谐振器组的可重构多通道微波光子接收器，用于多频带信号

据我们所知，我们认为这是一种新颖的可重构多通道微波光子（MWP）接收器，用于多频段射频信号，这是首次展示。所提出的接收器中采用了基于两个级联微环滤波器组的可重构MWP信号处理芯片，它将多频带RF输入分割成多个窄带信号，并选择光学频率梳线用于每个通道的频率转换。由于信号处理芯片具有显着的可重构性，所提出的接收器可以灵活选择每个通道的输出频段，因此多频段射频输入的不同频率分量可以下变频到中频（IF）频段接收或转换到其他频段进行转发。由具有 2 GHz 带宽的线性调频 (LFM) 信号和具有 100 Mbit/s 速率的四相移键控 (QPSK) 信号组成的多频段 RF 信号由所提出的接收器进行实验接收和重建，其中重建的LFM分量的信噪比(SNR)为10.2 dB，重构的QPSK分量达到26.1 dB的高SNR和11.73%的大误差矢量幅度(EVM)。另一方面，以13.5 GHz为中心的多频段RF信号的QPSK分量成功转换到3.1 GHz。