Optimizacija prijenosa audio signala u GSM mreži

scientific master's theses

• Title (english): Optimization of audio signal transmission in GSM network
• Author: Davor Udier
• Mentor: Branko Somek (mentor)
• Committee member: Borivoj Modlic (predsjednik povjerenstva)
• Committee member: Branko Somek (član povjerenstva)
• Committee member: Antun Sertić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2003, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Radio Communications
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Polazeći od analize prirode, metoda redukcije, sažimanja, kodiranja i prijenosa audio signala te multimedijalnih i ostalih podataka u GSM sustavu moguće je ustanoviti mjesta u prijenosnom lancu na kojima dolazi do degradacija kvalitete, kao i mehanizme GSM sustava korištenjem kojih se degradacije u prijenosu mogu smanjiti. Cilj je ovog rada uvesti odgovarajuće subjektivne i objektivne mjerne postupke za ocjenu kvalitete prijenosa te na osnovi provedenih mjerenja u realnim uvjetima predložiti načine otkrivanja degradacija i metode optimizacije prijenosa signala koristeći se raspoloživim GSM upravljačkim mehanizmima. Razvijen je informacijski sustav za obradu i analizu mjerenja radijskog sučelja te automatski programski moduli za optimizaciju mreže. Razvijeni algoritmi i metode poboljšanja prijenosa testirani su i primijenjeni u komercijalnoj uporabi.

Abstract (english)

By analyzing the nature, reduction and compression methods, coding and transmission of audio signal, rich contents (multimedia) and other data in GSM system, it is possible to determine points in the transmission chain where different degradations of quality occur as well as the GSM mechanisms using which the effect of such degradations can be reduced. The objective of this thesis is to introduce relevant subjective and objective measurment methods for evaluation of transmission quality and, based on measurements in real-life conditions, propose methods for detecting degradations and optimizing signal transmission using available GSM control mechanisms. An information system for processing and analyzing radio subsystem performance measurement was developed as well as automatic software modules for optimizing the network. Developed algorithms and methods for improving the transmission have been tested and used in commercial network operation.

• Keywords: GSM; kodiranje; kvaliteta govora; handover; upravljanje snagom; optimizacija; radio link; BSS mjerenja; UMTS
• Keywords (english): GSM; coding; speech quality; handover; power control; optimization; radio link; BSS performance measurement; UMTS
• Language: croatian
• URN:NBN: urn:nbn:hr:168:012990
• Study programme: Title: Postgraduate master programme in electrical engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
• Catalog URL: https://lib.fer.hr:8443/cgi-bin/koha/catalogue/detail.pl?biblionumber=29149
• Type of resource: Text
• Extent: 123 str. ; 30 cm
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-09-09 09:37:45