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undergraduate thesis
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Testing the impact of interference on the work of local wireless networks that use OFDM technology
Antonio Krajinović (2014)
University of Zagreb
Faculty of Electrical Engineering and Computing
Metadata
TitleIspitivanje utjecaja interferencije na rad lokalnih radijskih mreža koje rabe OFDM tehnologiju
AuthorAntonio Krajinović
Mentor(s)Gordan Šišul (thesis advisor)
Abstract
Ispitivanje utjecaja interferencije na rad lokalnih radijskih mreža koje rabe OFDM tehnologiju kao rezultat je pokazalo da u sustavima koji su neadekvatno raspoređeni unutar ISM opsega frekvencija ostvaruju minimalne performanse zbog interferencije sa drugom, smetajućom pristupnom točkom. Taj negativan utjecaj vidljiv je i uz veliku snagu korisnog signala jer i tu ako imamo dovoljno jaku smetnju, možemo pridonijeti pogreškama. Pogreška uslijed interferencije ključna je ako se dogodi za vrijeme trenirajuće sekvence jer u slučaju krive sinkronizacije gubimo poslani paket. Postoji naravno i vjerojatnost da interferencija stvori pogrešku unutar paketa, ali je takva pogreška manje bitna i vjerojatno je da će biti ispravljena. Sve modulacijsko-kodne sheme imaju isti format okvira, pa je i vjerojatnost pogreške u sinkronizaciji uslijed interferencije gotovo uvijek jednaka. Iz toga razloga bolje se spajati na što učinkovitiju modulacijsko-kodnu shemu, koliko nam već razina signala dopušta.
Keywordsinterference OFDM technology 802.11.g physical layer code rate
Parallel title (English)Testing the impact of interference on the work of local wireless networks that use OFDM technology
Committee MembersGordan Šišul (committee chairperson)
Zvonimir Šipuš (committee chairperson)
Leonard Novosel (committee member)
Dubravko Babić (committee member)
Josip Vuković (committee member)
Marko Bosiljevac (committee member)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
PlaceZagreb
StateCroatia
Scientific field, discipline, subdisciplineTECHNICAL SCIENCES
Computing
Study programme typeuniversity
Study levelundergraduate
Study programmeComputing
Academic title abbreviationuniv.bacc.ing.comp.
Genreundergraduate thesis
Language Croatian
Defense date2014-07-14
Parallel abstract (English)
Testing the impact of interference in the work of local radio networks that use OFDM technology has shown that the access points that are inadequately deployed within the ISM frequency range achieved minimum performance due to interference from another access point. This negative effect is seen even if we have high signal power, because if interference is strong enough, performance will drop. Error due to interference is crucial if it happens during training sequences causing the wrong synchronization and loss of packages. There is a possibility of interference error within the data frame, but such an error is less important and is likely to be corrected. All modulation-coding schemes have the same frame format, so the probability of synchronization errors due to interference is always the same. For this reason, it is better to connect to the most efficient modulation-coding scheme allowed.
Parallel keywords (Croatian)interferencija OFDM tehnologija 802.11.g fizički sloj omjer zaštitnog koda
Resource typetext
Access conditionNo public access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:168:925089