scholarly journals Dual Threshold Self-Corrected Minimum Sum Algorithm for 5G LDPC Decoders

Information ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 355
Author(s):  
Rong Chen ◽  
Lan Chen
Keyword(s):  
Mobile Communication ◽  
Channel Coding ◽  
Communication Systems ◽  
Code Rate ◽  
Fifth Generation ◽  
Transmission Reliability ◽  
Average Proportion ◽  
New Generation ◽  
Digital Communication Systems ◽  
Better Than

Fifth generation (5G) is a new generation mobile communication system developed for the growing demand for mobile communication. Channel coding is an indispensable part of most modern digital communication systems, for it can improve the transmission reliability and anti-interference. In order to meet the requirements of 5G communication, a dual threshold self-corrected minimum sum (DT-SCMS) algorithm for low-density parity-check (LDPC) decoders is proposed in this paper. Besides, an architecture of LDPC decoders is designed. By setting thresholds to judge the reliability of messages, the DT-SCMS algorithm erases unreliable messages, improving the decoding performance and efficiency. Simulation results show that the performance of DT-SCMS is better than that of SCMS. When the code rate is 1/3, the performance of DT-SCMS has been improved by 0.2 dB at the bit error rate of 10 − 4 compared with SCMS. In terms of the convergence, when the code rate is 2/3, the number of iterations of DT-SCMS can be reduced by up to 20.46% compared with SCMS, and the average proportion of reduction is 18.68%.

Train-mounted Broadband Monopole Antenna for 5G Communication

2021 ◽  
Vol 36 (7) ◽  
pp. 879-884
Author(s):  
Hao Li ◽  
Lu Xu ◽  
Feng Qian ◽  
Yong Zhou
Keyword(s):  
Mobile Communication ◽  
Communication Systems ◽  
High Speed ◽  
High Gain ◽  
Monopole Antenna ◽  
Mobile Terminals ◽  
High Speed Railway ◽  
Public Transport System ◽  
Fifth Generation ◽  
5G Mobile Communication

As a convenient and efficient public transport system, high speed railway (HSR) was rapidly deployed in China. Since the fifth generation (5G) mobile communication system is commercially applied, it is necessary for mobile terminals antennas to cover multiple operating bands to be compatible with various communication systems. Here a HSR-mounted broadband and high-gain monopole antenna is proposed. By using the meander technology and introducing the tapered structure, the proposed antenna operates over a bandwidth of 694-960 MHz and 1350-5975 MHz (VSWR<1.8), which covers both 2G-5G mobile communication and WiFi frequency bands. The dimensions of the proposed antenna are 400 mm × 330 mm × 78 mm. The measured average gain is 6.11 dBi over the entire bandwidth.

scholarly journals A DUAL CIRCULARLY RECONFIGURABLE POLARIZATION PATCH ANTENNA FOR FIFTH GENERATION MOBILE COMMUNICATION SYSTEMS

2020 ◽  
Vol 105 ◽  
pp. 73-84
Author(s):  
Nazih K. Mallat ◽  
Mahdi Nouri ◽  
Sajjad Abazari Aghdam ◽  
Muhammad Talha Zia ◽  
Bassam Harb ◽  
...  
Keyword(s):  
Mobile Communication ◽  
Patch Antenna ◽  
Communication Systems ◽  
Mobile Communication Systems ◽  
Fifth Generation

scholarly journals NFVMon: Enabling Multioperator Flow Monitoring in 5G Mobile Edge Computing

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Enrique Chirivella-Perez ◽  
Juan Gutiérrez-Aguado ◽  
Jose M. Alcaraz-Calero ◽  
Qi Wang
Keyword(s):  
Mobile Networks ◽  
Communication Systems ◽  
Edge Computing ◽  
Mobile Edge Computing ◽  
High Definition ◽  
Flow Monitoring ◽  
Fifth Generation ◽  
New Generation ◽  
Monitoring Architecture

With the advances of new-generation wireless and mobile communication systems such as the fifth-generation (5G) mobile networks and Internet of Things (IoT) networks, demanding applications such as Ultra-High-Definition video applications is becoming ever popular. These applications require real-time monitoring and processing to meet the mission-critical quality of service requirements and are expected to be supported by the emerging fog or edge computing paradigms. This paper presents NFVMon, a novel monitoring architecture to enable flow monitoring capabilities of network traffic in a 5G multioperator mobile edge computing environment. The proposed NFVMon is integrated with the management plane of the Cloud Computing. NFVMon has been prototyped and a reference implementation is presented. It provides novel capabilities to provide disaggregated metrics related to the different 5G mobile operators sharing infrastructures and also about the different 5G subscribers of each of such mobile operators. Extensive experiments for evaluating the performance of the system have been conducted on a mid-sized infrastructure testbed.

Vergleich von Hardware- und Software-Implementierungen in der digitalen Kommunikation am Beispiel der Kanalcodierung (Hardware-/Software Trade-Offs in Digital Communication Systems with Special Emphasis on Channel-Coding)

2003 ◽  
Vol 45 (6) ◽  
Author(s):  
Norbert Wehn
Keyword(s):  
Channel Coding ◽  
Communication Systems ◽  
Digital Communication ◽  
Trade Offs ◽  
Digital Communication Systems

ZusammenfassungUnsere heutige Informationsgesellschaft erfordert Datenzugriffe an jedem Ort und zu jeder Zeit. Bandbreite und Energie sind hierbei kritische Ressourcen. Deshalb benötigen drahtlose Kommunikationsstandards effiziente Fehlerkorrekturverfahren. In diesem Beitrag diskutieren wir den Entwurfsraum für fortgeschrittene Kanalcodierungsverfahren und präsentieren verschiedene Hardware- und Softwareimplementierungen.

scholarly journals Modulator for implementation of amplitude modulation of many components

2021 ◽  
pp. 30-35
Author(s):  
I. V. Horbatyi ◽  
U. S. Carp ◽  
I. R. Tsymbaliuk
Keyword(s):  
Mobile Communication ◽  
Amplitude Modulation ◽  
Communication Systems ◽  
Practical Implementation ◽  
Digital Signals ◽  
Information Efficiency ◽  
Different Types ◽  
Basic Operating ◽  
Modulation Type ◽  
Digital Communication Systems

The authors consider various anti-noise techniques in systems using digital signals, in particular QAM (quadrature amplitude modulation) signals. To increase the noise immunity of a system, it is proposed to use amplitude modulation of many components (AMMС). The advantages of this approach are demonstrated. The principles of AMMС signal formation are explained. The frequency efficiency, energy efficiency, and information efficiency of such signals are theoretically calculated. Different types of digital modulation are compared, the data being presented as a table, and a conclusion is made about a possible practical implementation of the modulator for AMMC signal formation. Structural and functional diagrams of the modulator for AMMC implementation are proposed. The study formulates basic operating principles of such a device, which are used to propose a design option of the modulator. The paper describes particular aspects of creating the main units of the modulator. The authors investigate the characteristics of such a device, particularly the spectrum of the output signal. The obtained research results allow drawing a conclusion that the device complies with the formulated implementation principles of the declared modulation type. A general conclusion is made that the manufactured modulator is suitable for the AMMC. The device is proposed to be used in modern digital communication systems, such as mobile communication systems.

scholarly journals Low complexity Turbo synchronization without initial carrier synchronization

2010 ◽  
Vol 8 ◽  
pp. 123-128 ◽  
Author(s):  
U. Wasenmüller ◽  
C. Gimmler ◽  
N. Wehn
Keyword(s):  
Turbo Codes ◽  
Channel Coding ◽  
Communication Systems ◽  
Low Complexity ◽  
Wireless Data ◽  
Carrier Synchronization ◽  
Wireless Data Transmission ◽  
Xilinx Fpga ◽  
Digital Communication Systems ◽  
Turbo Synchronization

Abstract. Wireless data transmission results in frequency and phase offsets of the signal in the receiver. In addition the received symbols are corrupted by noise. Therefore synchronization and channel coding are vital parts of each receiver in digital communication systems. By combining the phase and frequency synchronization with an advanced iterative channel decoder (inner loop) like turbo codes in an iterative way (outer loop), the communications performance can be increased. This principal is referred to as turbo synchronization. For turbo synchronization an initial estimate of phase and frequency offset is required. In this paper we study the case, where the initial carrier synchronization is omitted and an approach with trial frequencies is chosen. We present novel techniques to minimize the number of trial frequencies to be processed. The communications performance and effort of our method is demonstrated. Furthermore the implementation complexity of the whole system is shown on a Xilinx FPGA.

scholarly journals Analysis of Characteristics and Requirements for 5G Mobile Communication Systems

2017 ◽  
Vol 54 (4) ◽  
pp. 69-78 ◽  
Author(s):  
G. Ancans ◽  
A. Stafecka ◽  
V. Bobrovs ◽  
A. Ancans ◽  
J. Caiko
Keyword(s):  
Mobile Communication ◽  
Communication Systems ◽  
Current Data ◽  
Mobile Communication Systems ◽  
Available Bandwidth ◽  
Fifth Generation ◽  
Data Rates ◽  
Wireless Broadband ◽  
5G Mobile Communication ◽  
Insight Into

Abstract One of the main objectives of the fifth generation (5G) mobile communication systems, also known as IMT-2020, is to increase the current data rates up to several gigabits per second (Gbit/s) or even up to 10 Gbit/s and higher. One of the possibilities to consider is the use of higher frequencies in order to enlarge the available bandwidth. Wider bandwidth is necessary to achieve much higher data rates. It should be noted that wireless broadband transmission technologies require frequencies for their development. The main goal of the research is to investigate the characteristics and requirements of 5G mobile communication systems. The paper provides an insight into deployment scenario and radio wave propagation in frequencies above 24 GHz of IMT-2020.

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