scholarly journals Impact Of Atmospheric Parameters And Noise Temperature On Digital Terrestrial Television Signal Strength Overkarshi Area, Abuja, North-Central, Nigeria

2021 ◽  
Vol 665 (1) ◽  
pp. 012048
Author(s):  
Joseph Sunday Ojo ◽  
Abdullahi Ayegba ◽  
Adekunle Titus Adediji
Keyword(s):  
Noise Temperature ◽  
Signal Strength ◽  
Atmospheric Parameters ◽  
North Central ◽  
Television Signal ◽  
Digital Terrestrial Television

scholarly journals EFFECT OF SOME RADIO CLIMATIC FACTORS ON DIGITAL TERRESTRIAL TELEVISION SIGNAL IN A SAHEL SAVANNAH CITY OF NIGERIA

2020 ◽  
Vol 4 (2) ◽  
pp. 111-118
Author(s):  
Akinsanmi Akinbolati ◽  
Moses Oludare Ajewole
Keyword(s):  
Atmospheric Pressure ◽  
Climatic Factors ◽  
Correlation Coefficients ◽  
Digital Signal ◽  
Signal Strength ◽  
Mean Value ◽  
Wet Season ◽  
Temperature And Humidity ◽  
Data Points ◽  
Digital Terrestrial Television

This study investigates the effect of some radio climatic factors on the Received Signal Strength (RSS) of a Digital Terrestrial Television Broadcast Station (DTTBS) in Katsina City, Nigeria. The RSS was measured at intervals along selected routes around the station using a digital signal strength meter.  GPS receiver was used to log the line of sight, geographic coordinates and heights of data points from the station. The atmospheric pressure, temperature and humidity corresponding to data points were concurrently measured using a compact weather station whereas the corresponding surface radio refractivity (Ns) values were computed. Data were collected during dry and wet season months’ in the year 2017. Results shown that, Ns is inversely proportional to RSS irrespective of routes and seasons with correlation coefficients of -0.51 and -0.57 during dry and wet season months respectively. Higher mean value of, 358.50 (N-units) was deduced during wet compared to the dry season months of 301.20 (N-units). Average atmospheric pressure of 951.92 and 949.61 (hPa) and as well as humidity values of 32.25 and 77.93 %RH were deduced during dry and wet season months’ respectively. Findings also show that pressure is inversely proportional to RSS. The overall effects of pressure, temperature and humidity on RSS is better understood using the effect of Ns since the latter is derived from those parameters. This study concludes that the specified radio climatic factors have attenuation effect on UHF signal and should be put into consideration when planning link’s design and power budgets on the UHF band.  

Preliminary performance evaluation and verification of digital terrestrial television signal propagation

2021 ◽  
Vol 3 (2) ◽  
pp. 53-66
Author(s):  
Leboli Thamae ◽  
Itumeleng Potsanyane ◽  
Mpho Mokhetsengoane
Keyword(s):  
Performance Evaluation ◽  
Signal Strength ◽  
Signal Propagation ◽  
Capital City ◽  
Digital Television ◽  
Signal Quality ◽  
Measured Signal ◽  
Set Top Box ◽  
Digital Terrestrial Television ◽  
University Town

This article presents the computer simulation and field test measurement results on Channel 29 for the preliminary performance evaluation and verification of the newly-installed Lesotho digital terrestrial television network based on DVB-T2 standard following the guidelines and techniques specified by the ITU-R BT.2035-2. It evaluates, at predetermined outdoor locations for fixed and mobile reception, parameters such as received signal strength, signal quality, bit-error rate (BER) and threshold-of-visibility (ToV) together with TV signal decoding (observation of screen artefacts) for quasi error-free reception. The results indicate that at over 97% of the test sites/points at the university town of Roma, the main Berea Plateau transmitter from the capital city (Maseru) broadcasts digital television service with enough signal level and quality to be properly decoded. The measured signal strength threshold ranges above -50 dBm for good reception, -64 dBm to -50 dBm for acceptable reception and -69 dBm to -64 dBm for poor reception. With the noise floor at about -73 dBm, the minimum required C/N of around 23 dB for good reception and about 4 dB for ToV have been recorded. The relative values of minimum required respective signal strength and signal quality for ToV obtained from the set-top box are 33% and 18% for stationary reception, while they give 37% and 20% for mobile reception.

scholarly journals A Qualitative Study of Signal Strength Coverage of Digital Terrestrial Television in Ibadan South Western Nigeria

2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Hakeem Sanya Bolarinwa
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Signal To Noise Ratio ◽  
Power Level ◽  
Signal Strength ◽  
Digital Television ◽  
Efficient Data ◽  
Digital Terrestrial Television ◽  
Data Collation

This work investigated the quality of signal strength coverage of the existing Digital Terrestrial Television (DTTV) operator in Nigeria using Startimes Ibadan as a case study. Signal strength and altitude data at different locations within a 40km radius of the Startimes transmitting station were measured to determine the quality of signal strength reception of Startime's digital television in Ibadan metropolis. A signal analyzer, a 10-meter cable, Yaggi external antenna and Global Positioning System (GPS) were used for the measurements at various locations in Ibadan within 40km radius distance of Startimes based station at Agodi in Ibadan. The city was grouped into six different zones for proper signal testing and efficient data collation. Parameters such as signal strength, distance, altitude, signal to noise ratio, modulation error rate, pre-bit error rate and post-bit-error rate were measured and recorded. The effects of distance and altitude were analyzed. It was observed from the result that there is a direct relationship between power level and altitude. In addition, there is an inverse relationship between power level and distance.

scholarly journals Using Electromagnetic Signal Propagation Models for Radio and Television Broadcasts: An Introduction

2018 ◽  
Vol 26 (3) ◽  
pp. 348-355 ◽  
Author(s):  
Charles Crabtree ◽  
Holger L. Kern
Keyword(s):  
Media Exposure ◽  
Signal Strength ◽  
Signal Propagation ◽  
Electromagnetic Signal ◽  
Social Scientists ◽  
Propagation Models ◽  
Radio Stations ◽  
Individual Level ◽  
Level Data ◽  
Television Signal

This note offers an introduction to electromagnetic signal propagation models, which can be used to model terrestrial radio and television signal strength across space. Such data are useful to social scientists interested in identifying the effects of mass media broadcasts when (i) individual-level data on media exposure do not exist or when (ii) media exposure, while observed, is not exogenous. We illustrate the use of electromagnetic signal propagation models by creating a signal strength measure of military-controlled radio stations during the 2012 coup in Mali.

Stromatoporoids from the Famennian (Devonian) Wabamun Formation, Normandville oilfield, north–central Alberta, Canada

1988 ◽  
Vol 62 (03) ◽  
pp. 411-419 ◽  
Author(s):  
Colin W. Stearn
Keyword(s):  
Patch Reef ◽  
Abundant Species ◽  
The Other ◽  
North Central ◽  
Biotic Crisis

Stromatoporoids are the principal framebuilding organisms in the patch reef that is part of the reservoir of the Normandville field. The reef is 10 m thick and 1.5 km2in area and demonstrates that stromatoporoids retained their ability to build reefal edifices into Famennian time despite the biotic crisis at the close of Frasnian time. The fauna is dominated by labechiids but includes three non-labechiid species. The most abundant species isStylostroma sinense(Dong) butLabechia palliseriStearn is also common. Both these species are highly variable and are described in terms of multiple phases that occur in a single skeleton. The other species described areClathrostromacf.C. jukkenseYavorsky,Gerronostromasp. (a columnar species), andStromatoporasp. The fauna belongs in Famennian/Strunian assemblage 2 as defined by Stearn et al. (1988).

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