Adaptive asymmetric linearization of radio over fiber links for wireless access

Fernando, Xavier; Sesay, A.B.

doi:10.1109/tvt.2002.804841

Cited by 78 publications

(74 citation statements)

References 14 publications

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“…The non-linear behaviour of the photo-detector can be exploited for achieving optical upconversion, where the mixing 10 Extinction-ratio is the ratio of the optical power transmitted for bit 1 to that transmitted for bit 0. It has an ideal value of ∞.…”

Section: Optical Upconversion Using the Non-linearity Of The Photomentioning

confidence: 99%

“…Note that, as shown in Fig. 1, some of the literature refers to the BS-RAP link [10]- [12] as the Central Station (CS)-Radio Access Unit (RAU) link 1 [13], [14]. Both terminologies are valid and used in the literature interchangeably.…”

mentioning

confidence: 99%

“…using the BS-RAP terminology [10]- [12]. The important point to note here is that the ROF link exists between a point that performs centralized signal processing and a low complexity antenna-bearing point.…”

mentioning

confidence: 99%

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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 Upconversion Using the Non-linearity Of The Photomentioning

confidence: 99%

mentioning

confidence: 99%

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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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“…2002 Fernando et al [82] Pre-distortion in the downlink and post-compensation in the uplink using high-order Pre-distortion adaptive filters linearized the ROF link, while keeping the RAP simple. and post-compensation 2003 Roselli et al [83] Low cost pre-distortion circuits were designed for compensating 2nd and 3rd order distortions that arise from direct modulation of lasers.…”

Section: G Linearized Optical Modulatorsmentioning

confidence: 99%

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Thomas

El‐Hajjar

Hanzo

2015

IEEE Commun. Surv. Tutorials

139

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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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“…Radio over fibre (ROF) is a promising solution to the challenge of having a large number of small cells with high-RF frequencies [3][4][5][6]. It is also possible for macrocells to co-exist with microcells, when relying on the ROF technique [7].…”

Section: Introductionmentioning

confidence: 99%

Optical single sideband signal generation relying on a single‐drive Mach–Zehnder modulator for radio over fibre communications

2016

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Optical single sideband (OSSB) signals are conventionally generated using a dual-drive Mach-Zehnder modulator (MZM) or by using a single-drive MZM in conjunction with a fibre Bragg grating filter. In this study, the authors propose and mathematically characterise a novel radio over fibre downlink in which an OSSB signal is generated using a single-drive, rather than dual-drive, MZM without any additional filter. Additionally, their proposed scheme can achieve optical upconversion of the electronic signal. Furthermore, in addition to cost advantages, the proposed scheme's BER Q3 performance is better than the classical OSSB signal generation scheme.

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Adaptive asymmetric linearization of radio over fiber links for wireless access

Cited by 78 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

Performance Improvement and Cost Reduction Techniques for Radio Over Fiber Communications

Optical single sideband signal generation relying on a single‐drive Mach–Zehnder modulator for radio over fibre communications

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