Analiza primjenjivosti MIMO-antena u širokopojasnim bežičnim komunikacijama

scientific master's theses

• Title (english): Applicability of MIMO antennas in wideband wireless communications
• Author: Mario Družijanić; VIAF: 305660721
• Mentor: Juraj Bartolić (mentor)
• Committee member: Robert Nađ (predsjednik povjerenstva)
• Committee member: Juraj Bartolić (član povjerenstva)
• Committee member: Slavko Šarić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Communication and Space Technologies); Zagreb
• Defense date and country: 2008-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Radio Communications
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Bežični širokopojasni pristup postao je glavna tehnološka smjernica u telekomunikacijama. HSPA+ tehnologija je danas postala uvjerljivi lider u širokopojasnim bežičnim komunikacijama te predstavlja prelaz s 3G sustava (UMTS) na LTE (Long term evolution). HSPA+ se bazira na više različitih metoda kojima je cilj poboljšanje brzine i kvalitete paketskog prijenosa prije svega pretraživanja Interneta, video poziva te mobilne televizije. U 3GPP reviziji 7 predložene su nove metode kojima bi se dodatno povećala spektralna efikasnost sustava, dostupne brzine prijenosa podataka te i u isto vrijeme smanjila osjetljivost sustava na šum te različite izvore interferencije. Predložena rješenja uključuju MIMO koncept odnosno korištenje više antena i u baznoj stanici i na mobilnom uređaju (bilo da se radio o mobitelu, prijenosnom računalu...) upotpunjenih posebnim tehnikama obrade signala. MIMO se bazira na dva ključna principa: prostorno multipleksiranje i diverziti. Prostorno multipleksiranje povećava brzinu prijenosa odašiljanjem više paralelnih neovisnih nizova paketa istovremeno. S druge strane diverziti ima za cilj poboljšanje odnosa korisnog signala prema interferenciji i šumu. U magistarskom radu predstavljen je način funkcioniranja MIMO antenskog sustava. Objašnjen je izgled kanala MIMO-sustava te njegov utjecaj na kapacitet. Također su prezentirane različite metode za implementaciju MIMO prema 3GPP standardima. Teoretski aspekti su upotpunjeni simulacijama izrađenim pomoću Matlab alata te mjerenjima u stvarnoj mreži korištenjem TEMS Investigation alata i HSDPA kartice.

Abstract (english)

Wireless broadband access has become main driver in telecommunications today. New applications need new technologies who can respond to user expectations. There are different proposal for standardization of wireless broadband access but HSPA+ has become the most used. It's extension to 3G (UMTS) systems towards LTE (Long term evolution). HSPA+ is based on different methods with common goal: to increase speed and quality of packet data connection like Internet browsing, video calls and mobile TV. In 3GPP release 7 new methods have been proposed in for further increase in spectral efficiency and data rate. Those methods are also aiming to decrase overall interference in system. One of new things which will come in 3GPP release 7 is so called MIMO antenna concept. MIMO concept means multiple transmiting antennas on radio base station as well as multiple recieving antenna at mobile terminal side (wheather is mobile station, laptop or similar). MIMO concept also introduces new signal processing techiniques. MIMO is based on two principles: spatial multiplexing and diversityziti. Spatial multiplexing increase packet data rate by transmitting multiple different data streams simuntaniously. From other side diversityziti is increasing signal to interference ratio. In this master thesis MIMO antenna concept is presented. Basic MIMO functionalities are covered. MIMO spatial channel is dicsussed with impact on overall system capacity. Different MIMO methods as part of 3GPP standardization are presented. Teoretical aspects are extended by appropriate simulations performed with Matlab. Also live measurments in HSPA network were performed with TEMS Investigation software (with HSDPA data card) and results are included in thesis.

• Keywords: MIMO; HSDPA; HSPA+; WCDMA; HS-DSCH; diverziti; prostorno multipleksiranje
• Keywords (english): MIMO antenna systems; HSDPA; HDPA+; WCDMA; HS-DSCH; diversity; spatial multipleksing
• Language: croatian
• URN:NBN: urn:nbn:hr:168:680147
• 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)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-05-28 15:26:48