scholarly journals A Comparative Study of 4G and VoLTE

2021 ◽  
Vol 9 (12) ◽  
pp. 2338-2341
Author(s):  
Atharva Khandekar
Keyword(s):  
High Speed ◽  
Cost Effective ◽  
Fourth Generation ◽  
Wireless System ◽  
Data Services ◽  
High Spectral Efficiency ◽  
High Speed Data ◽  
4G Wireless ◽  
4G Lte ◽  
Voice Calls

Abstract: This research paper provides an insight into the comparison between VoLTE and 4G. 4G Wireless Systems or Fourth generation wireless system is a packet switched wireless system with wide area coverage and high throughput. It is designed to be cost effective and to provide high spectral efficiency. VoLTE (voice over LTE) supports voice calls over 4G LTE network. With advanced VoLTE technology, the 4G network now provides high-speed data services, high-quality voice and video calls at affordable price. This paper first presents the challenges and benefits of both 4G and VoLTE and then compares them with consideration of different points. Keywords: GSM, LTE, VoLTE, 3G, HSPA, RAN

scholarly journals ANALISIS PENINGKATAN KAPASITAS SISTEM SELULER 4G LTE PADA SISTEM KOMUNIKASI HIGH ALTITUDE PLATFORM STATION

2017 ◽  
Vol 9 (1) ◽  
pp. 31
Author(s):  
Catur Budi Waluyo ◽  
Yenni Astuti
Keyword(s):  
High Altitude ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Elevation Angle ◽  
Coverage Area ◽  
Data Services ◽  
High Altitude Platform ◽  
High Speed Data ◽  
4G Lte ◽  
High Altitude Platform Station

In the development o f wireless communications, to provide high-speed data services and wide bandwidth become a challenge. One technique to make it happen is by using Multicarrier Orthogonal Frequency Division Multiplexing (OFDM) modulation, where in OFDM, frequency selective fading channel effect will be perceived flat fading by each subcarrier. One communication system that supports OFDM technology is Long Term Evolution (LTE) with various types of bandwidth configurations provided. To improve LTE performance in capacity building, coverage area and data rate, it can use multi antenna technique both in receiver and sender, and integrate with High altitude platform station (HAPs) system. In this study the estimation used is Linear Minimum Mean Square (LMMSE). The relationship o f the elevation angle and the K factor is directly proportional, but the elevation angle value is inversely proportional to the diameter o f the HAPs coverage area. In addition, the more the number o f used antennas, the greater the capacity served. Based on the simulation results, the system with estimation can be used to expand the coverage area to 215.77 km which is from 0.032 km in QPSK modulation, speed 60 kmpj with 2x2 antennas.

Broadband Communications for Aircraft in Oceanic and Other Remote Areas

2014 ◽  
Vol 1 (1) ◽  
pp. 51-59
Author(s):  
Stephen John Curran
Keyword(s):  
Video Streaming ◽  
High Speed ◽  
Data Communication ◽  
Data Service ◽  
Fibre Optic ◽  
Technical Challenge ◽  
Data Services ◽  
Remote Areas ◽  
Broadband Communications ◽  
High Speed Data

Data communication with aircraft presents unique technical challenges and these challenges are more pronounced when the aircraft are travelling over oceanic or other remote areas. When in populated areas, systems are available that can support high speed data services, one Gigabit per second (Gbps) and beyond via, terrestrial ground stations. However no such systems exist to provide airborne communications with high bandwidths among aircraft and between aircraft and the ground in more remote regions. Passengers will expect data service on the aircraft similar to what they typically experience on the ground. Multimedia activities, such as video streaming, are very bandwidth intensive and the provision of these services presents a serious technical challenge. On the ground, fibre optic cables are the method of choice for the provision of high speed data service, and in contrast, an airborne high speed data communications solution will need to be a wireless one.

scholarly journals Hybrid RF/visible light communication in downlink wireless system

2018 ◽  
Vol 7 (2.28) ◽  
pp. 272
Author(s):  
Tharindu D. Ponnimbaduge Perera ◽  
Akashkumar Rajaram ◽  
Sangay Chedup ◽  
Dushantha Nalin K. Jayakody ◽  
Bin Chen
Keyword(s):  
Visible Light ◽  
High Speed ◽  
Visible Light Communication ◽  
Symbol Error Rate ◽  
Electrical Signal ◽  
Cooperative System ◽  
Wireless System ◽  
Communication Models ◽  
Rf Communication ◽  
High Speed Data

The spectrum crunch in Radio Frequency (RF) Communication and the prospect of Visible Light Communication (VLC) as an alternative to RF has made way for high speed VLC deployment. The ubiquitous coverage of RF and the high speed data rate achieved with VLC, make the two technologies complimentary to each other, making the hybrid RF/VLC an emerging trend in wireless networks. This study presents a downlink communication of a hybrid RF-VLC, where the signal received through RF channel by a relay is decoded and the symbols are converted into an electrical signals. The electrical signal is fed to an array of LEDs in the relay where data is transmitted in rays of light from LEDs. The hybrid RFVLC system performance is compared with a conventional RF system to understand the performance difference between the two communication models. Thus, the performance of both system models are analysed in terms of Symbol Error Rate and Outage Probability. Numerical results show that the proposed hybrid RF-VLC system is superior to conventional lone RF cooperative system.  

High-speed data services using the Switched Digital Broadband Access System

2002 ◽  
Vol 2 (2) ◽  
pp. 188-202 ◽  
Author(s):  
Humberto J. La Roche ◽  
Stephen L. Myers ◽  
James P. Runyon ◽  
Gerald S. Soloway ◽  
David W. Spears
Keyword(s):  
High Speed ◽  
Broadband Access ◽  
Data Services ◽  
Access System ◽  
High Speed Data

Management of high-speed data services

1993 ◽  
Author(s):  
Michele Marini ◽  
Gian A. Mariani ◽  
Massimo Peruso
Keyword(s):  
High Speed ◽  
Data Services ◽  
High Speed Data

scholarly journals A Low Computational Complexity Algorithm of PTS Technique for PAPR Reduction in the 4G and 5G Systems

Webology ◽  
2020 ◽  
Vol 17 (2) ◽  
pp. 746-775
Author(s):  
Raghda Abdulbaqi Mugher
Keyword(s):  
Distribution System ◽  
High Speed ◽  
Spectral Power ◽  
Average Power ◽  
Data Communication ◽  
Spectral Power Density ◽  
Ofdm Systems ◽  
High Speed Data ◽  
4G Wireless ◽  
Papr Performance

The (OFDM) defined as orthogonal multiplex frequency distribution system is very popular of the design of waveforms for high speed data communication in 4G wireless technology. In addition, a filter-based waveform design, such as filtered OFDM (F-OFDM), has been proposed as a candidate for the 5G technology waveform in order to overcome the current weaknesses of OFDM. And 5G requirements. The high average peak ratio (PAPR) is taken as the main obstacle to OFDM and remains an inherent problem with F-OFDM since both systems support orthogonal transmission. In this study, a new efficient algorithm called groupings of complex variants of PTS (G-C-PTS) was proposed to reduce the level of high complexity in PTS. G-C-PTS can significantly reduce complexity with a slight decrease in PAPR performance compared to traditional PTS. In addition, comparisons were made between (OFDM) and (F-OFDM) systems based on the GC-PTS algorithm for PAPR, bit error rate (BER) and spectral power density (PSD) to validate the proposed algorithm. Partial transmit sequence (PTS) procedure is considered one of the production strategies to decrease the high peak-to-average power ratio (PAPR) in the 4G waveform plane, for example multiplex frames for symmetric repetition division (OFDM).

An Improved Algorithm Based on Optimized PTS in MIMO-OFDM System

2013 ◽  
Vol 765-767 ◽  
pp. 2801-2804
Author(s):  
Ya Jing Wang ◽  
Ya Zhen Li ◽  
Li Qun Huang
Keyword(s):  
Spectral Efficiency ◽  
Communication System ◽  
High Speed ◽  
Fourth Generation ◽  
Ofdm System ◽  
Broadband Wireless ◽  
High Spectral Efficiency ◽  
Mimo Ofdm ◽  
Simulation Results ◽  
Improved Algorithm

The fourth generation mobile communication system is a high-speed broadband wireless communication system, it needs MIMO and OFDM technology which have high spectral efficiency and suitable for a multi-path fading channel. Because the MIMO-OFDM system is still an multi-carrier modulation system, the main drawback is the high PAPR value. This paper proposed an improved algorithm based on optimized PTS to reduce PAPR in STBC MIMO-OFDM system. The simulation results show that the improved algorithm can effectively reduce the PAPR value and do not increase the amount of computation in STBC MIMO-OFDM system.

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