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9001 Uppsatser om Radio system - Sida 1 av 601

Webbradion : ett nytt medium

The purpose of this essay is to study the role of web radio in Sweden. To fulfill the purpose we have done a case study of two Swedish radio stations: Sveriges Radio AB, which is a public service station, and a commercial station called Mix Megapol. By interviewing two persons from each station and analyzing the contents of their web sites, we have tried to see how the relationship between radio, Internet and web radio looks like. Thus, our method is qualitative. We have come to many conclusion of which some are: The new medium web radio borrows qualities from the traditional radio.

Radioräckviddsberäkningar för flygande plattformar

There exist several known methods for calculation of radio coverage for ground-based systems. As far as we know there are no equivalent methods for the case of flying platforms when the altitudes and speeds are significantly different to those of ground-based systems. This thesis describes the theoretical concepts behind calculations of radio coverage for flying platforms. An investigation is made to sort out what is important and possible to employ in a model for simulations. A method is described and implemented in a program for evaluation of flying Radio systems.

Radiolänk med GNU Radio

At the Department of Technology and Built environment at the University of Gävle there was an interest to study GNU Radio, which is an "open source radio project. The project is based on that most of the radio signal processing is made in an ordinary PC. The idea behind this degree project was that in a laptop there are several radio transmitters/receivers that takes space, generates heat and transmit in varied frequency band etcetera. All these radio transmitters/receivers could be replaced with a Software Defined Radio system. It means that one common, general radio hardware is used to different communications such as: WLAN, Bluetooth, GPRS, 3G etcetera. The waveform is generated in the software, which makes the system very flexible.

"Real, truthful radio" : en formanalys av ?direktreflekterande? radioprogram.

This essay aims to analyse the form of two radio documentary shows and compare them to, what I mean are a traditional, Swedish radio documentary form. The radio shows are Radiolab distributedby National Public Radio and WNYC, Övernaturligt (supernatural) produced by TredjeStatsmakten Media AB and P3 Dokumentär (P3 Documentary) distributed by Sveriges Radio. Alarge part of the essay is dedicated to develop a method to analyse form in specific radio shows. Mymethod consists of two parts:1. A defining of sounds in a spreadsheet that map out the different sound elements over time.2.

Nyhetsradio : Om skillnaderna i korta riksnyhetssändningar mellan två kommersiella radiostationer och public serviceradion.

The purpose of this BA-thesis was to learn the differences in news broadcasts between one public service radio channel and two commercial radio channels. To do this we used a quantitative analysis method to examine the content of the news broadcasts and then we conducted in-depth interviews with several people working with the different radio channels using a qualitative research interview method to learn their views on news and news broadcasting.We measured the differences between the channels in six areas: subject, headline, news presentation, gender, advertising and sources.Our two main theories were normative theory and media logic.The results found that there were several major differences between the public service radio channel and the two commercial radio channels. Apart from several important differences in the six measured categories we also found that the sound and tone in the public service radio channel was very different from the two commercial radio channels.We also found the public service radio channels news broadcasts to be more serious than the two commercials ones?..

Design and implementation of a 5GHz radio front-end module

The overall goal of this diploma work is to produce a design of a 5 GHz radio frontend using Agilent Advanced Design System (ADS) and then build a working prototype. Using this prototype to determine if RF circuits at 5 GHz can be successfully produced using distributed components on a laminate substrate. The design process for the radio front-end consists of two stages. In the first stage the distributed components are designed and simulated, and in the second stage all components are merged into a PCB. This PCB is then manufactured and assembled.

Utvärdering av försvarsspecifika radiovågformer

To be able to evaluate different radio waveforms in a laboratory environment FOI in Linköping has developed an experimental system for radio communication called Rasmus. The system consists of a transmitter, a channel emulator and a receiver. The transmitter modulates a digital signal to a desired analogue waveform. The channel emulator is used to simulate a real radio channel. The channel emulator distorts the signal by splitting it up in several propagation paths.


Radiomediets utveckling - En fallstudie av produktionsflöden på Sveriges Radio Västerbotten

The development of the radio medium ? a case study of Sveriges radio is a scientific report of the case study that was made in the spring of 2014 on Sveriges Radio Västerbotten. The report investigates and analyzes how radio has been developed.The purpose of this study is to analyze the production flows of the radio and explore how it has been developed. The project?s objective is to raise the knowledge in media development, primarily radio?s development.The scientific theory is based on the concept of media convergence, in this chapter the reader will learn what media convergence means, but also how it works in the media world and the Public Service.

Pålagt skratt i radio: Fungerar det?

Pålagt skratt är något som har använts i hela tevens historia och används än idag. Från början fick man inspirationen från radions tidiga dagar då man ofta spelade in sina program eller shower framför en publik. Det pålagda skrattet har funnits i din teveapparat i nästan 70 år, men i din radio hör du det aldrig. Varför inte det? Mitt examensarbete syftar till att göra ett humorprogram i radio med pålagt skratt och undersöka vad folk tycker om detta grepp i radio.

Optimering av ultraljudssändare- och mottagare avseende räckvidd, strålningsvinkel och energiförbrukning

Embedded Systems Lab at Umeå University is currently part of a research project with the purpose to examine the behavior of dairy cows inside a barn. Each cow needs to be tracked with a precision of 50 cm, and since GPS-technique has poor functionality at indoor environments, an indoor positioning system needs to be developed.Embedded Systems Lab has already developed an indoor positioning system using IR-light and radio, but since this system demands extensive infrastructure and is rather expensive, an alternate positioning system using ultrasonic pulses and radio is being examined.In this report the range, beam angle and current consumption of ultrasonic transmitters- and receivers are investigated. Three different driver stages for the transmitter is tested, and two amplifier solutions for the receiver. The report also describes how the length of the transmitted ultrasonic pulse affects the received signal, accessibility of a ?shadowed? signal, and the effect of different sound frequency..

Visuell Radio

Visuell radio eller ljudbildspel i radio är i stort sett ett outforskat område. Att det går att göra visuell eller audiovisuell radio rent praktiskt och tekniskt står klart - publiceringsverktygen och tekniska lösningar finns. Det detta arbete problematiserar och diskuterar är hur visuell radio skulle kunna utformas och gestaltas både utifrån ett produktionsperspektiv och ett mottagarperspektiv. Detta sker genom att titta på mediaföretagens multimediala publiceringar men också genom att förstå hur deras redaktionerna tänker om hur ljud och bild kan samverka. Bland annat intervjuas personer som arbetar på New York Times, Svenska Dagbladet, DuckRabbit och MediaStorm för att få denna inblick.

Scalable Services over DAB and DVB-T from a Receiver Point of View

TV and radio services have always been distributed over analogue broadcasting networks and been received on a TV -set or a radio receiver. Today this situation is changing due to digitalization and convergence between broadcasting, telecommunications and data communications. Other terminals, such as a PC, can also receive TV and radio services. Digital TV and radio can offer additional services such as e-commerce, electronic program guides and content synchronized to the TV and radio shows. If these services are to be received by several receiving terminals with different properties, the services must be adapted to the terminals.

Tal till text för relevant metadatataggning av ljudarkiv hos Sveriges Radio

Tal till text för relevant metadatataggning av ljudarkiv hos Sveriges RadioSammanfattningUnder åren 2009-2013 har Sveriges Radio digitaliserat sitt programarkiv. Sveriges Radios ambition är att mer material från de 175 000 timmar radio som sänds varje år ska arkiveras. Det är en relativt tidsödande process att göra allt material sökbart och det är långt ifrån säkert att kvaliteten på dessa data är lika hög hos alla objekt.        Frågeställningen som har behandlats för detta examensarbete är: Vilka tekniska lösningar finns för att utveckla ett system åt Sveriges Radio för automatisk igenkänning av svenskt tal till text utifrån deras ljudarkiv?        System inom tal till text har analyserats och undersökts för att ge Sveriges Radio en aktuell sammanställning inom området.        Intervjuer med andra liknande organisationer som arbetar inom området har utförts för att se hur långt de har kommit i sin utveckling av det berörda ämnet.        En litteraturstudie har genomförts på de senare forskningsrapporterna inom taligenkänning för att jämföra vilket system som skulle passa Sveriges Radio behov och krav bäst att gå vidare med.        Det Sveriges Radio bör koncentrera sig på först för att kunna bygga en ASR, Automatic Speech Recognition, är att transkribera sitt ljudmaterial. Där finns det tre alternativ, antingen transkribera själva genom att välja ut ett antal program med olika inriktning för att få en så stor bredd som möjligt på innehållet, gärna med olika talare för att sedan även kunna utveckla vidare för igenkänning av talare.

Minnesallokering och debugverktyg

The aim of this report is to give a description of a diploma work of 20 points that has been performed during the spring 2006 at Ericsson AB in Borås. The report accounts for the problem and procedure during the diploma work. The software used for this project was embedded in a radio link. The RAM in this radio link was divided into several regions where two were used for memory allocation. The current allocation of memory in the radio link was not optimized with regards to performance, security and memory use and the configuration used made it difficult to determine the memory use of the system and the actual memory need.

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