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Millimeter-wave radio over fiber opticalupconversion techniques relyingon link nonlinearity

机译:光纤上的毫米波无线电上转换技术依赖关于链路非线性

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摘要

A study of advanced upconversion techniques used in Radio Over Fiber (ROF) is provided. With the huge increase in both the number of wireless communication subscribers and the bandwidth required per customer, migrating to higher frequencies i.e. from lower radio frequency to millimeter wave carriers is an essential solution. However, due to the short propagation range of millimeter waves, a large number of radio access points are required for providing reliable coverage, which would increase the infrastructure costs. Hence, the transmission of RF signals between the central (or control) points and radio access points (or remote antenna units) using optical fibers is one of the major access network solutions that have been proposed for future high-bandwidth wireless communication systems. In this paper we introduce the basics of Radio Over Fiber communication including optical modulation, the optical channel and the optical detection techniques. Then we survey the family of advanced optical upconversion techniques that exploit the non-linearity of the ROF link. Specifically, we describe how optical upconversion can be achieved by exploiting the Mach Zhender Modulator’s (MZM’s) non-linearity, wavelength conversion techniques or the photo-detector’s non-linearity. The wavelength conversion techniques rely on the non-linearities present in the fiber, in the optical amplifier or in the Electro-Absorption Modulator (EAM).
机译:提供了对光纤无线电(ROF)中使用的高级上变频技术的研究。随着无线通信订户数量和每个客户所需带宽的大量增加,迁移到较高的频率,即从较低的射频迁移到毫米波载波是必不可少的解决方案。然而,由于毫米波的传播范围短,需要大量的无线电接入点以提供可靠的覆盖范围,这将增加基础设施成本。因此,使用光纤在中央(或控制)点与无线电接入点(或远程天线单元)之间的RF信号传输是为未来的高带宽无线通信系统提出的主要接入网络解决方案之一。在本文中,我们介绍了光纤无线电通信的基础知识,包括光调制,光信道和光检测技术。然后,我们调查了利用ROF链接的非线性特性的高级光学上变频技术系列。具体来说,我们描述如何通过利用Mach Zhender调制器(MZM)的非线性,波长转换技术或光电探测器的非线性来实现光学上转换。波长转换技术依赖于光纤,光放大器或电吸收调制器(EAM)中存在的非线性。

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