Analysis of Radio Link Blockage Effect on Communication System Using mmWave Frequency Band

2019 ◽  
Vol 44 (8) ◽  
pp. 1478-1485
Author(s):  
Seungkwon Baek ◽  
Jaesu Song ◽  
Kijun Han
Keyword(s):  
Frequency Band ◽  
Communication System ◽  
Radio Link ◽  
Blockage Effect

scholarly journals Developing Hybrid Car to Car Communication System Based on MIMO Visible Light and Radio Frequency

2022 ◽  
Author(s):  
Nermeen Maged Okasha ◽  
AbdelHalem A. Zekry ◽  
Fatma A. Newagy
Keyword(s):  
Visible Light ◽  
Frequency Band ◽  
Communication System ◽  
Matlab Simulation ◽  
High Attenuation ◽  
Hybrid Car ◽  
Small Delay ◽  
Rf Communication ◽  
Communication Distance ◽  
Throughput And Delay

Abstract This paper combines the advantages of both VLC communication and RF communication for car-to-car applications to achieve a higher data rate, more range coverage, smaller delay, and smaller BER. In the proposed scheme, the VLC maximum communication distance is chosen as 100 m per-hop approximately, which can be extended through multi-hop up to the timeout window of 5 hops. In contrast, the RF maximum communication distance is chosen as 200 m per-hop approximately, which is reasonable at the frequency band of 70 GHz to 90 GHz due to the high attenuation at this frequency band. A MATLAB simulation for a car-to-car framework is built to demonstrate and compare the BER, throughput, and delay outcomes at a hybrid VLC and RF communication. Our results show that VLC can achieve up to four times of the RF throughput while maintaining low BER of 10-6 and small delay of 10-4 with respect to RF communication only.

Distributed Generation Communications Utilizing a Real-time FPGA-based Channel Simulator in the ISM Frequency Band

2007 ◽  
Vol 8 (1) ◽  
Author(s):  
Julian Meng ◽  
Shane Barnes
Keyword(s):  
Distributed Generation ◽  
Frequency Band ◽  
Communication System ◽  
Local Area Network ◽  
Low Cost ◽  
Additive White Gaussian Noise ◽  
Area Network ◽  
Centralized Control ◽  
Wide Area Network ◽  
Channel Simulator

Deregulation of the power industry, increases in consumer demand of electricity and mandates to reduce greenhouse gases has significantly heightened the interest in distributed generation (DG). Typical DG sources include wind turbines, fuel cells, micro gas/diesel turbines, small hydro generators and photovoltaics. Currently most of these generation sources are optimized for local operation and thus the potential of DG that is both dispatchable and cost-effective has yet to be fully realized. One key technical challenge is the development of low-cost communications for remote telemetry and control of individual DG sources. Along with cost, other key communication system requirements are modularity, range and reliability. This paper presents a distributed generation communication system (DGCS) that is based on a wide area network (WAN) and local area network (LAN) topology and utilizes two variants of low-cost radio modems (RM) to satisfy the desired connectivity between the DG sites and a centralized control center. For the LAN, low-cost RMs operating in the industrial, scientific, and medical (ISM) frequency band offers point-to-multipoint scalability to multiple DG sites within a limited range. Integration of the ISM RMs with a cellular RM provides connectivity to a WAN or Internet thus providing long-range access to DG sites from any facility that has internet-access. Given the LAN scalability requirement, an ISM field programmable gate array (FPGA) channel simulator was developed to assess DGCS performance using channel impairments such as free-space path loss, multipath reflections, additive white Gaussian noise (AWGN), multiple access interference, and narrowband interference. This study provides the evaluation of two commercially available ISM radio modems and recommendations are made based on LAN requirements such as cost and performance given difficult channel conditions.

scholarly journals Rain Attenuation Prediction Models in Microwave and Millimeter Bands for Satellite Communication System: A Review

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Hammed O Busari ◽  
Olaosebikan A Fakolujo
Keyword(s):  
Frequency Band ◽  
Communication System ◽  
Communication Systems ◽  
Satellite Communication ◽  
Rain Rate ◽  
Satellite System ◽  
Rain Attenuation ◽  
Rapid Expansion ◽  
Satellite Communication System ◽  
Communication Signal

The progressively demand on satellite communication systems has consequently resulted in lower frequency bands getting more congested. The usage of frequency band beyond 10 GHz is in focus nowadays as a result of the rapid expansion of radio communication systems. However, Rain is the leading attenuation factor of different communication signal of frequencies beyond 10 GHz. Attenuation due to rain has a significant propagation effect that needs to be carefully considered in satellite communication system network. Rain attenuation predictions and rain rate are essential when planning microwave satellite communication links.  A review of the rain rate integration time and rain attenuation models for microwave and millimeter bands satellite system is presented.  Keywords: Frequency Band, Rain Attenuation, Rain Attenuation Model, Rain Rate, Satellite System

Design of a Ring Monopole Dual-Frequency Antenna Fed by Coplanar Waveguide

2012 ◽  
Vol 241-244 ◽  
pp. 2555-2558
Author(s):  
Qi Wang
Keyword(s):  
Wireless Communication ◽  
Frequency Band ◽  
Communication System ◽  
Coplanar Waveguide ◽  
Monopole Antenna ◽  
Experimental Results ◽  
Antenna Design ◽  
Dual Band ◽  
Dual Frequency ◽  
Antenna Structure

A printed ring-shaped monopole antenna fed by coplanar waveguide for use in the dual-band wireless communication system has been presented and investigated. By adding some branch strips inside the ring and changing its size, as well as the further optimization, the proposed antenna could work effectively within the scope of 2.4-2.484GHz and 5.15-5.825GHz frequency band. Practical antenna structure is fabricated. The details of the antenna design and both the theoretical and experimental results are discussed.

System Simulation and Coverage Analysis of 5G NR Communication System Based on 700 MHz Frequency Band

2021 ◽  
pp. 125-137
Author(s):  
Zhongqiu Xiang ◽  
Xuemin Huang ◽  
Pei Zhao ◽  
Xiaohui Zhang ◽  
Shumin Jiang ◽  
...  
Keyword(s):  
Frequency Band ◽  
Communication System ◽  
System Simulation ◽  
Coverage Analysis

Space Shuttle MODUS: Key System for the Installation of Networks of Benthic Stations

2005 ◽  
Author(s):  
Hans W. Gerber ◽  
Gu¨nther F. Clauss
Keyword(s):  
Communication System ◽  
Deep Sea ◽  
Space Shuttle ◽  
Radio Link ◽  
Underwater Communication ◽  
Extended Version ◽  
Seafloor Observatory ◽  
Seafloor Observatory Network ◽  
Cable Connection

In the last decade within several European and bi-national (German-Italian) projects a set of equipment and technology for benthic stations, and their deployment and recovery has been developed. Starting with a single prototype station which operated autonomously for several months in the Mediterranean Sea (GEOSTAR2 – Geophysical and Oceanographic Station for Abyssal Research – Deep Sea Mission, 1999–2001, /1/) with a near-real-time-communication-system including a acoustic link from station to buoy and a shore radio link. This concept has been extended to realize a sub-sea network of several benthic stations (ORION- Ocean Research by Integrated Observation Networks, 2002–2005, /1/). This includes an extended version of the GEOSTAR acoustic underwater communication system between the stations and the buoy unit for direct shore communication. For the deployment and recovery of these benthic stations the deep-sea shuttle MODUS (Mobile Docker for Underwater Sciences) has been developed and used (operation depth 4000 m). All operations up to now were successfully conducted. The ORION-network is under operation at a water depth of 3700 m North of Sicily/Italy since December 2003. In addition to this MODUS has been used to install the first long-term benthic station directly cable connected to shore. Thus, the first European long term benthic station has been established, with the aim to demonstrate a technology for the ongoing plans for a European deep-sea shore network (ESONET – European Seafloor Observatory Network, /1/). The deployment took place east of Sicily using MODUS and a ROV for the realization of the cable connection between the station and the cable termination in January 2005.

METHOD FOR INCREASING TRANSFER RATE IN HF RADIO SYSTEMS AND ITS IMPLEMENTATION (part 1)

2020 ◽  
pp. 7-22
Author(s):  
B. G. Shadrin ◽  
V. A. Dvoryanchikov ◽  
B. S. Bogankov
Keyword(s):  
Frequency Band ◽  
Communication System ◽  
Communication Systems ◽  
Transfer Rate ◽  
Communication Channel ◽  
Block Diagram ◽  
Radio Communication ◽  
External Interference ◽  
Radio Systems ◽  
Radio Communication System

A method for increasing the transfer rate in HF radio communication systems is proposed, which, in comparison with existing methods, allows it to be doubled without expanding the frequency band occupied by the communication channel. The block diagram of one of the variants of the HF radio communication system that implements the proposed method is presented. The analysis of the operation of the communication system in the absence of external interference and the influence of interference concentrated over the spectrum is carried out.

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