为了满足宽带通信的发展需求，提出了一种基于相干双光频梳的微波光子信道化接收机，所用的光频梳仅需一个双平行马赫-曾德尔调制器就可生成，平坦度高，外带抑制比高，自由谱范围灵活可调，并且有效简化了接收机的复杂程度。在I/Q解调模块中，利用平衡探测方法不仅有效抑制了二阶交调失真和直流偏移，还提高了接收机的动态范围，同时利用电耦合器配合电带通滤波器解决了超外差架构普遍存在的镜像干扰问题，最终实现了5 GHz带宽射频信号的信道化接收。

I/Q不平衡OFDM系统基于噪声方差门限的信道估计

I/Q不平衡对QPSK信号检测的影响，孙红恩，周坤，本文主要是研究同相与正交(I/Q)支路幅度和相位不平衡对PSK系统数字接收机接收性能的影响。无论是幅度不平衡还是相位不平衡都会引入�

Photonics-based radar with a photonic de-chirp receiver has the advantages of broadband operation and real-time signal processing, but it suffers from interference from image frequencies and other undesired frequency-mixing components, due to single-channel real-valued photonic frequency mixing. In this paper, we propose a photonics-based radar with a photonic frequency-doubling transmitter and a balanced in-phase and quadrature (I/Q) de-chirp receiver. This radar transmits broadband linearly fr