2 edition of Propagation and interference studies in broadcast frequency bands in Nigeria found in the catalog.
Propagation and interference studies in broadcast frequency bands in Nigeria
Francis Cinco Franklin Nzeribe
Written in English
Ph.D. Thesis. Typescript.
PROPAGATION PATH LOSS AT VHF/UHF BANDS FOR ILORIN CITY, NIGERIA N. Faruk, et al NIGERIAN JOURNAL OF TECHNOLOGY VOL. 32 NO. 2, JULY Preamplifier Resolution bandwidth (RBW) Center frequency (f1) Center frequency (f2) 10 kHz MHz MHz Antenna Type, Diamond RH Frequency range Form Frequency Height . Propagation Mechanisms by Frequency Bands. VLF and LF (10 to kHz) Waveguide mode between Earth and D-layer; ground wave at short In the high-frequency (HF) band it interference from signals arriving from other parts ofthe Earth. Also, HF propagation depends File Size: KB.
Propagation Comparisons at VHF and UHF Frequencies Xiaohu Zhang, Student Member, IEEE, Thomas Weston Burress, Keith B. Albers, and William B. Kuhn, Senior Member, IEEE Kansas State University, Manhattan, KS, , U.S.A Abstract — This paper presents and compares measured propagation data taken at four unlicensed-band frequenciesFile Size: 1MB. Band J. Isabona, and gbon 1Department of Basic SciencesBensonIdahosa University, PMB, Benin City, Nigeria 2Department of Mathematics and Computer Sciences Abstract: Radio Frequency (RF) propagation is the study of how radio waves broadcast .
In the diagram of medium wave propagation, c shows the space wave propagation. Basically the technique of space wave propagation is used in bands having very high frequencies. E.g. V.H.F. band, U.H.F band etc. At such higher frequencies the other wave propagation techniques like sky wave propagation, ground wave propagation can’t work. The study investigates the effect of propagation impairments such as rain, cloud, gases and tropospheric scintillation on fixed satellite communication link on earth-space path for frequencies between 10 and 50 GHz at Ku, Ka and V bands for 37 locations in Nigeria. Two standard elevation angles of 50, as well as some elevation angles for links to recently launched Nigeria .
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Propagation and interference studies in broadcast frequency bands in Nigeria: The refinement of propagation data in tropical Africa, enabling African Broadcast Network planners to minimise interference and maximise spectral utilisation Author: Nzeribe, F.
This study investigated the received signal strength and the propagation profiles for UHF chan broadcast signal in Ondo State, Nigeria, at various elevation levels. The. Performance Evaluation of Radio Propagation Models on GSM Network in Urban Area of Lagos, Nigeria area under study.
All prediction calculations were carried out in the ATOLL network planning tool. frequency band over long distances ranging from 1 20 Km.
It – is best suited to GSM and GSMUMTS, CDMA frequencies have capacity limitations and create more interference. In Nigeria, the VHF and UHF frequency bands of the electromagnetic spectrum are mainly occupied by television services, while radio broadcasting is transmitted in the low frequency, medium frequency and high frequency : V N Okorogu, Alumona T.
L, P E Onwuka, C J Emenike. VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA/ITS, originally developed for Voice of America (VOA). This 'work-in-progress' guide should get you well started with the software.
Predicting TV Coverage Using Path Loss Models Today, propagation models are used extensively in coverage planning and optimization and signal prediction, and is found very useful for interference analysis.
Path loss models are applied in cellular environments, ﬂxed wireless access systems and TV broadcast systems. broadcast services, automobile spark plugs and many others. Dealing with radio frequency interference The working assumption for most astronomical observations is that RFI-corrupted data are unusable.
The most common method for dealing with RFI is to excise spectral or temporal segments of a data set that are known to be Size: 1MB. conducted in other regions of the world such as Korea, Nigeria, Japan, the model based on which calculations were made in this study is the Weather Research Forecasting (WRF-ARW version ).
Furthermore, real world measurements in Band II Author: Antonis Constantinides, Panayiotis Michael. As opposed to VHF and UHF frequency waves that travel primarily through the air standard band AM daytime propagation uses groundwaves.
The M3 map, shown below, appears in Section of the Commission’s rules. It shows the conductivity regions in various areas of the U.S. A similar map for region 2,File Size: KB.
Studies on E-band antennas and propagation. different wall material s at E-band frequencies has been. They mitigate interference by channelling the antenna's radiation to the direction of. Cellular systems have operated in the frequency band from to MHz.
Additional bands near GHz are now being used throughout the world for second-generation cellular sys-tems, while GHz is used for wireless local loops.
Unlicensed frequency bands near Makurdi, Nigeria I. INTRODUCTION using Makurdi as a case study. The analysis of radio propagation by a GSM operative entails the characteristics/ behavior of the radio wave between the transmitter and the receiver.
An understanding of the radio wave propagation interference distance constraints, all the cells of the area. However, these conclusions are based on propagation over a smooth surface. Irregularities in terrain, including the bulge of the earth itself, have the effect of cancelling this advantage of the higher VHF frequencies since the PROPAGATION IN THE FM BROADCAST BAND 39 1 expected fields far beyond the line of sight decrease with increasing by: 2.
Monitoring out-of-band frequencies Out-of-band is defined as stations broadcasting on frequencies that are outside a defined telecommunications frequency band.
The following data represents recent international monitoring observations from January 1, - February 5, their signals should not constitute interference to others .
The Broadcating Service of Ekiti State (BSES), is the electronic media outfit of the government of Ekiti State, Southwest, Nigeria. It is a combination of both the radio and television services.
The television service is on channel 41 on the ultra high frequency band while. LTE and Future DTV Compatibility Study in the UHF band in Nigeria. O.I. Sanusi, A.O. Gbenga-Ilori.
Abstract - This paper presents a compatibility study between future digital television (DTV) and Long Term Evolution (LTE) in the UHF band using Nigeria as a case study. This is done by carrying out an adjacent interference analysis to evaluate the impact of LTE base.
Military Radar Bands Military radar band nomenclature, L, S, C, X, Ku, and K bands originated during World War II as a secret code so scientists and engineers could talk about frequencies without divulging them.
After the war the codes were declassified and Ka band and millimeter (mm) were added. interference protection criteria, limits of unwanted emission, frequency dependent environmental characteristics, engineering models of antennas and radiowave propagation, and a description of radio service-specific analysis models that address single and aggregate interference.
Further, propagation studies can validate the use of certain frequency bands for particular purposes. As a rule of thumb, allocating a service to the highest frequency possible will improve spectrum efficiency.
Developments in transmitter and receiver technology make ever higher frequencies possible. Radio waves in the VLF band propagate in a ground, or surface wave. The wave is connected at one end to the surface of the earth and to the ionosphere at the other. The ionosphere is the region above the troposphere (where the air is), from about 50 to miles above the earth.
The chapter then discusses techniques of effective prediction of high-frequency (HF) radio propagation and monitoring of the results. The chapter ends with recommendations on these topics. Inasmuch as this is an interim report of the study, remaining aspects of Tasks 1 and 2 will be covered in the final report.Path loss models are often used by radio network engineers to predict signal coverage, optimize limited network resources, and perform interference feasibility studies.
However, the propagation mechanisms of electromagnetic waves depend on the physical characteristics of the wireless by: 7.Band Designation Frequency Range (Approximate) AM broadcast band (medium wave) kHz Shortwave radio MHz VHF TV (channels ) MHz VHF TV (channels ) MHz FM broadcast band MHz Aircraft radio MHz Commercial and public safety MHz VHF TV (channels ) MHz UHF TV (channels ) File Size: 4MB.