Baseband Radio over Fiber Aided Millimeter-Wave Distributed Antenna for Optical/Wireless Integration

Thomas, Varghese; Ghafoor, Salman; El‐Hajjar, Mohammed; Hanzo, Lajos

doi:10.1109/lcomm.2013.030413.122841

Cited by 13 publications

(4 citation statements)

References 14 publications

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“…Moreover, the refractive index changes with the temperature, thereby resulting in a temperature dependent reflected wavelength value [49]. Additionally, an OSSB signal can be generated by the quadrature biased 6 dual-drive MZM of 6 In a quadrature biased dual-drive MZM,…”

Section: ) Optical Double Side Band Intensity Modulationmentioning

confidence: 99%

Millimeter-Wave Radio Over Fiber Optical Upconversion Techniques Relying on Link Nonlinearity

Thomas

El‐Hajjar

Hanzo

2016

IEEE Commun. Surv. Tutorials

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Abstract-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 ROF 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 nonlinearity of the ROF link. Specifically, we describe how optical upconversion can be achieved by exploiting the Mach-Zehnder modulator's nonlinearity, wavelength conversion techniques, or the photodetector's nonlinearity. The wavelength conversion techniques rely on the nonlinearities present in the fiber, in the optical amplifier, or in the electroabsorption modulator. Index Terms-Radio over fiber, direct modulation, external modulation, direct photo-detection, coherent photo-detection, mach zehnder modulator, cross phase modulation, self phase modulation, four wave mixing, stimulated raman scattering, stimulated brillouin scattering, optical frequency modulation, optical phase modulation, optical intensity modulation, optical single side band modulation, optical double side band modulation, optical carrier suppression modulation, sub carrier multiplexing, wavelength division multiplexing, optical N-tupling, optical upconversion, semiconductor optical amplifier, electro-absorption modulator, mach zehnder interferometer, highly nonlinear dispersion shifted fiber, nonlinear optical loop mirror, millimeter wave, 5G, microwave photonics.

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Section: ) Optical Double Side Band Intensity Modulationmentioning

confidence: 99%

Millimeter-Wave Radio Over Fiber Optical Upconversion Techniques Relying on Link Nonlinearity

Thomas

El‐Hajjar

Hanzo

2016

IEEE Commun. Surv. Tutorials

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“…The optical front-hauls can be classified into three categories, baseband-over-fiber (BBoF) [5], intermediate-frequency-over-fiber (IFoF) [6], and radio-frequency-over-fiber (RFoF) [7]. In an IFoF or RFoF scheme, analog signals are transmitted in the optical fiber, and they will suffer from distortions and attenuations introduced by the optical channels.…”

Section: Architecture Of Optical Front-haulsmentioning

confidence: 99%

“…On the other hand, optical fiber has negligible impact on a BBoF scheme with digital baseband signals transmitted in the fiber. However, the complexity and power consumption of RAPs in a BBoF or IFoF system are much higher than their RFoF counterparts due to complex signal processing and radio frequency (RF) up-conversion [5] performed at the RAP. Given the huge number of antennas or RAPs required to support high connection density, it is desirable to install antennas or RAPs with low cost, low complexity, and low power consumption.…”

Section: Architecture Of Optical Front-haulsmentioning

confidence: 99%

Massively Distributed Antenna Systems with Non-Ideal Optical Fiber Front-hauls: A Promising Technology for 6G Wireless Communication Systems

Yu,

Wu,

Zhou

et al. 2020

Preprint

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Employing massively distributed antennas brings radio access points (RAPs) closer to users, thus enables aggressive spectrum reuse that can bridge gaps between the scarce spectrum resource and extremely high connection densities in future wireless systems. Examples include cloud radio access network (C-RAN), ultra-dense network (UDN), and cell-free massive multiple-input multiple-output (MIMO) systems. These systems are usually designed in the form of fiber-wireless communications (FWC), where distributed antennas or RAPs are connected to a central unit (CU) through optical fronthauls. A large number of densely deployed antennas or RAPs requires an extensive infrastructure of optical front-hauls. Consequently, the cost, complexity, and power consumption of the network of optical front-hauls may dominate the performance of the entire system. This article provides an overview and outlook on the architecture, modeling, design, and performance of massively distributed antenna systems with non-ideal optical front-hauls. Complex interactions between optical front-hauls and wireless access links require optimum designs across the optical and wireless domains by jointly exploiting their unique

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“…One of the major access network solutions for future highbandwidth wireless communication systems is based on optical fibers for the transmission of radio signals between the Base Station (BS) and RAPs, which is generally referred to as a Radio Over Fiber (ROF) solution [2], [3], [4], [5], [6]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Thomas

El‐Hajjar

Hanzo

2015

IEEE Commun. Surv. Tutorials

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141

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Abstract-Advanced cost reduction and performance improvement techniques conceived for Radio Over Fiber (ROF) communications are considered. ROF techniques are expected to form the backbone of the future 5G generation of wireless networks. The achievable link performance and the associated deployement cost constitute the most salient metrics of a ROF architecture. In this paper, we commence by providing a rudimentary overview of the ROF architecture and then elaborate on ROF techniques designed for improving the attainable system performance. We conclude by describing the ROF techniques conceived for reducing the ROF system installation costs.

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Baseband Radio over Fiber Aided Millimeter-Wave Distributed Antenna for Optical/Wireless Integration

Cited by 13 publications

References 14 publications

Millimeter-Wave Radio Over Fiber Optical Upconversion Techniques Relying on Link Nonlinearity

Millimeter-Wave Radio Over Fiber Optical Upconversion Techniques Relying on Link Nonlinearity

Massively Distributed Antenna Systems with Non-Ideal Optical Fiber Front-hauls: A Promising Technology for 6G Wireless Communication Systems

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

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