ABSTRACT The combined use of carrier suppression single sideband (CS-SSB) modulation and photonic microwave phase shift is described and analyzed to realize microwave frequency down-conversion with image rejection. Based on the idea of phase cancellation, the image signals have identical amplitude and opposite phase to be suppressed, while the useful signals have identical amplitude and phase through an electrical 90 degree hybrid to be strengthened. The approach is investigated in theory and demonstrated using simulation. It is shown that the power of the useful IF signal is nearly 60 dB larger than that of the image IF signal. Besides, the zero-IF receiving capability of our approach has been also investigated when a modulated RF signal with different format input. The 2.5 Gbit/s RF modulated signals centred at 15 GHz with quadruple-, 8-, 16- phase shift keying (QPSK, 8PSK, 16PSK), and 16-quadrature amplitude modulation (16QAM) formats are successfully demodulated with good error vector magnitudes (EVMs) and constellation diagrams in wide power range of input RF carrier.

中文翻译：

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通过载波抑制单边带调制和光子微波相移实现镜像抑制的光子微波频率下变频器

摘要 描述和分析了载波抑制单边带 (CS-SSB) 调制和光子微波相移的组合使用，以实现具有镜像抑制的微波频率下变频。基于相位抵消的思想，图像信号具有相同的幅度和相反的相位被抑制，而有用的信号具有相同的幅度和相位通过电90度混合进行加强。该方法在理论上进行了研究，并使用模拟进行了演示。结果表明，有用中频信号的功率比镜像中频信号的功率大近60 dB。此外，我们还研究了当具有不同格式输入的调制射频信号时我们方法的零中频接收能力。2.5 Gbit/s RF 调制信号以 15 GHz 为中心，具有四重、八重、