International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 06 | Jun 2022
www.irjet.net
e-ISSN: 2395-0056 p-ISSN: 2395-0072
PERFORMANCE OF DIGITAL MODULATION TECHNIQUES ON MILLIMETER WAVE (5G) RADIO OVER FIBER A. SINDHIYA 1, P. E. IRIN DORATHY 2 Student, Dept of ECE, GCE-Tirunelveli, Tamil Nadu, India. Assistant Professor, Dept of ECE, GCE-Tirunelveli, Tamil Nadu, India. ---------------------------------------------------------------------***--------------------------------------------------------------------1
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Abstract - In this work, the performance of digital
modulation techniques on 5G system over fiber is observed. The performance analyses are based on the measured Bit Error Rate (BER) and the observed eye-diagram with Qfactor (Quality Factor) for the different modulation techniques such as ASK, FSK, QPSK, DPSK, 16 QAM, 64 QAM, and 256 QAM. There is a synergy between the wireless systems and optical network systems to enhance the transmission of RF signals from a central location to a separate unit of the radio element known as the remote radio head (radio over fiber). This technology provides a possible solution to increase capacity of channel, mobility, and reduced the cost. The system is simulated using a optical simulator software Optisystem 17. Key Words: DPSK, QAM
optical fiber to the remote mobile station. When the Radio Frequency signal is modulated to the optical link, the power consumption drops but the antenna side has high frequency radio carriers. The cost reduction in RoF can be achieved by two things. The first one is central station (CS), which provides resources that can be shared by variety of base stations (BS), and secondly, Base station (BS), which converts the optical signal into electrical signal that can be transmitted to mobile unit through antenna.
5G, Radio over Fiber, ASK, FSK, QPSK,
1. INTRODUCTION 5G networks connect people and things through intelligent networks (automatic route detecting) and applications, all generating an huge amount of data. It provides the best of all performance factors while simultaneously connecting more devices. These network advancements will enable a new wave of computing and technological innovation. In reality, the network infrastructure of 5G has to be in place to support the billions of devices and the trillions of megabits of data that will flood the network. Cellular capabilities have grown increasingly complex as each generation expanded functionality, applications, and services. To achieve all that 5G offers, a denser, fiber-rich network infrastructure that will be needed to provide the lower latency, longer battery life, higher data rates, ultra-high reliability and more connected devices.
1.1 RADIO OVER FIBER Radio over Fiber (RoF) is a technology where Radio Frequency signal modulates light (generated by laser or led) and then transmitting it over a fiber optic link. RoF technology supports both wireless and optical network. RoF is a more convenient system since it is low costing and low power consumption because Radio over Fiber allows the electrical signal to modulate the optical source and then the optical signal will travel along the © 2022, IRJET
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Fig -1: Block Diagram of RoF System
1.2 C-RAN Figure 2 shows the cloud/ centralized Radio Access Network architecture (C-RAN). A cloud BBU in the core station (which consists of a central pool resource) is physically connected to several remote antenna units (RAU).This setup reduces the complexity of small cell front-haul (5G) which in turn reduces the cost of deployment, expansion and maintenance.BS only functions as a converter of optical signal into a wireless signal and vice versa, while at Central Station, all process such as modulation, demodulation, coding and routing are executed. Because of high linear optical link, RoF system disperses the RF signal between CS and BSs.
Fig -2: C-RAN Architecture ISO 9001:2008 Certified Journal
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