L144 - Računarstvo i informatika - Računarske mreže - Milica Miletić - Nataša...NašaŠkola.Net
L144 - Računarstvo i informatika - Računarske mreže - Milica Miletić - Nataša Stojković
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
tema,
predmet,
učenika,
nastavnik,
Gimnazija Aleksinac
L144 - Računarstvo i informatika - Računarske mreže - Milica Miletić - Nataša...NašaŠkola.Net
L144 - Računarstvo i informatika - Računarske mreže - Milica Miletić - Nataša Stojković
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
tema,
predmet,
učenika,
nastavnik,
Gimnazija Aleksinac
This document is a student paper about replacing the electric motor on a "BEKO" washing machine. It discusses replacing the electric motor and lists several websites that provide free seminar papers, diploma papers, and matriculation papers along with PowerPoint presentations and other educational materials across all subject areas. The websites allow users to view the content and first three pages of papers to select ones that fully meet their needs, and papers in their databases can be downloaded and customized to create unique works. Users can also order custom papers if ones meeting their requirements are not found.
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This document discusses the role of the "gray economy" in the post-socialist transformation of society. It provides information about free seminar, diploma, and matriculation papers and other educational materials available on multiple websites that can be used to find and download works to help create unique papers and projects. The websites contain works from all fields that can be viewed in full before selecting to ensure the perfect fit for needs. Custom works can also be ordered if nothing suitable is found.
This document provides information about seminar, diploma and graduation papers available on various websites. It lists several websites that contain free works from all fields as well as PowerPoint presentations and other educational materials. The websites allow users to find seminar, diploma or graduation papers, presentations and other educational resources. In contrast to other sites, these sites allow viewing the full content and first three pages of each work so users can accurately choose what fully meets their needs. The databases contain papers that can be downloaded and used to create unique works. Users can also order custom papers if a suitable one is not found.
This document provides information about free seminar, diploma, and matriculation papers and supporting literature that can be found on various websites. The websites contain works from all fields, PowerPoint presentations, and other educational materials. Unlike other sites, these sites allow users to view the content, first three pages, and summary of each work so they can accurately choose what fully suits their needs. The databases contain seminar, diploma, and matriculation papers that can be downloaded to create a unique work. If a suitable work is not found, custom texts and supporting literature can be ordered through the websites.
This document is a student paper about replacing the electric motor on a "BEKO" washing machine. It discusses replacing the electric motor and lists several websites that provide free seminar papers, diploma papers, and matriculation papers along with PowerPoint presentations and other educational materials across all subject areas. The websites allow users to view the content and first three pages of papers to select ones that fully meet their needs, and papers in their databases can be downloaded and customized to create unique works. Users can also order custom papers if ones meeting their requirements are not found.
This document discusses the history and economic analysis of the krivaja region from 1878 to the present. It analyzes the region in three time periods: 1878-1945, 1946-1990, and 1990 to present. It then provides an analysis and proposes measures to protect the region. The document aims to give an overview of the economic development of the krivaja region over time and make recommendations to safeguard the region going forward.
Uloga 'sive ekonomije' u postsocijalistickoj transformaciji drustvaivica_seminarski
This document discusses the role of the "gray economy" in the post-socialist transformation of society. It provides information about free seminar, diploma, and matriculation papers and other educational materials available on multiple websites that can be used to find and download works to help create unique papers and projects. The websites contain works from all fields that can be viewed in full before selecting to ensure the perfect fit for needs. Custom works can also be ordered if nothing suitable is found.
This document provides information about seminar, diploma and graduation papers available on various websites. It lists several websites that contain free works from all fields as well as PowerPoint presentations and other educational materials. The websites allow users to find seminar, diploma or graduation papers, presentations and other educational resources. In contrast to other sites, these sites allow viewing the full content and first three pages of each work so users can accurately choose what fully meets their needs. The databases contain papers that can be downloaded and used to create unique works. Users can also order custom papers if a suitable one is not found.
This document provides information about free seminar, diploma, and matriculation papers and supporting literature that can be found on various websites. The websites contain works from all fields, PowerPoint presentations, and other educational materials. Unlike other sites, these sites allow users to view the content, first three pages, and summary of each work so they can accurately choose what fully suits their needs. The databases contain seminar, diploma, and matriculation papers that can be downloaded to create a unique work. If a suitable work is not found, custom texts and supporting literature can be ordered through the websites.
1. Fiksna telefonija | seminarski diplomski
Ovo je pregled DELA TEKSTA rada na temu "Fiksna telefonija". Rad ima 50 strana. Ovde je prikazano
oko 500 reči izdvojenih iz rada.
Napomena: Rad koji dobjate na e-mail ne izgleda ovako, ovo je samo DEO TEKSTA izvučen iz rada, da bi
se video stil pisanja. Radovi koje dobijate na e-mail su uređeni (formatirani) po svim standardima. U tekstu
ispod su namerno izostavljeni pojedini segmenti.
Uputstvo o načinu preuzimanja rada možete pročitati OVDE.
Diplomski rad
tema: Fiksna telefonija
predmet: Komutacioni sistemi
Sadržaj
Sadržaj...............................................................................................................................1.
Uvod......................................................................................................................2.
1. CDMA tehnologija..................................................................................................3.
1.1. Problem višestrukih refleksija – multipath..................................................................5.
1.2. Osnovni principi i tehnike rešavanja problema multipatha.........................................8.
-1.2.1. Rešenje problema multipatha u vremenskom domenu- Spread Spectrum.......8.
-1.2.2. Rešenje multipath problema u frekvencijskom domenu – OFDM...................9.
1.3. Korišćenje multipatha za povećanje protoka – „MIMO“..........................................11.
1.4. Uporedne karakteristike CDMA i OFDMA..............................................................13.
2. WiMAX tehnologija.............................................................................................14.
2.1. Standardi....................................................................................................................15.
-2.1.1. IEEE 802.16 standard.....................................................................................16.
-2.1.2. Pregled standarda............................................................................................17.
2.2. Tehnologija.................................................................................................................19.
2.3. Opis fizičkog sloja (PHY)..........................................................................................21.
2.4. Sloj za kontrolu pristupa medijumu MAC (Medium Access Control)......................23.
2.5. Podela WiMAX-a......................................................................................................25.
2.6. Osvrt na servise koje nudi mobilni WiMAX.............................................................28.
2.7. Internet preko WiMAX-a...........................................................................................29.
2.8. Praktična implementacija WiMAX-a.........................................................................31.
2.9. WiMAX oprema.........................................................................................................34.
-2.9.1. Korisnički terminali........................................................................................34.
-2.9.2. Bazne stanice...................................................................................................35.
2.10. Prednosti na tržištu...................................................................................................37.
Zaključak.........................................................................................................................40.
Legenda............................................................................................................................41.
Rečnik stranih reči i izraza.............................................................................................42.
Literatura.........................................................................................................................43.
Abstract............................................................................................................................44.
Uvod
Fiksna telefonija je sastavni deo društva jos od Belovog pronalaska telefona.Ranije je ona bila dostupna
samo stanovnicima u gradskim sredinama ali,sa razvojem tehnologije stvorili su se uslovi za proširenje
fiksne telefonije na ruralne(seoske) sredine.Upravo je to tema ovog rada u kome su predstavljeni načini
ostvarivanja mreže fiksne telefonije u ovim sredinama.
U gradskim sredinama se povezivanje korisnika vrši putem „žice“.Međutim,ovakav način povezivanja je
tehnički vrlo zahtevan u seoskim sredinama i vrlo neisplativ gledano s ekonomske strane.Zbog toga je
iskorišćena tehnologija mobilne telefonije.Signal ne ide žičanim putem,već putem radio talasa dolazi do
centrale i potom se distribuira korisnicima(preko žice ili bežičnim putem).Ovaj pristup je doveo do razvoja
tehnologija koje su se specijalizovale za distribuciju signala fiksne telefonije u sredinama koje su udaljene
od grada.Tehnologije koje će biti obrađene su CDMA i WiMAX,zbog svoje zastupljenosti i tehničkih
karakteristika koje predstavljaju,neskromno rečeno,budućnost bežičnog povezivanja.
2. 1. CDMA tehnologija
Potpuno nezavisan razvoj bežičnih sistema,oslanja se na tehniku proširenog spektra (Spread Spectrum –
SS). Koristi se Code Division Multiple Access (CDMA) tehnologija koja predstavlja ozbiljan tehnološki
napredak u odnosu na GSM.U početku su CDMA sistemi (prevashodno u Americi) bili osnova za mobilnu
telefoniju,a daljim unapređenjem počeli su da predstavljaju atraktivno rešenje i za prenos podataka.
...
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