13 uppsatser
… 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 …
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 …
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 …
In this Master's thesis, a direct-conversion receiver front-end has been designed in a 0.18um CMOS technology. Direct-conversion receivers (DCR) have obvious advantages over the heterodyne counterpart. Since the intermediate frequency (IF) is zero, the problem of image is …
när ska miljön få en reklampaus?
… and carbon dioxide emissions from an advertisement broadcasted on the radio or the television or distributed through press. The object was to calculate the amount of carbon dioxide emissions per individual receiver of an advertisement in Sweden. There was no room for a deeper …
ett räkneverk baserat på radiovågsteknik
… second purpose of this study is to become familiar with the technique of the Radio Beam Counter 2000 and evaluate its validity and reliability in the field. The counter is an instrument for measuring visitor use (people, bicyclists, cars, horses, etc.) which up to the date of …
… around two microcontrolers, one send module and a receiver module for radio communications with 433 MHz on AM. The microcontrolers are programmed with assembler by using the toolset MPLAB. The ability to be able to control who should be able to read a message has been a wish for …
… 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 …
… The developed system consists of a generic platform for different sensors, a receiver and software. A GPRS module from RO Rollytech AB and a database from Gema Industri AB have been modified and used to demonstrate an example of a complete system. To the platform, it is possible …
… is a joystick and a display mounted. In addition to this, there is also an IR receiver that is capable of reading the signal from the cameras own remote and sending it to the manoeuvre unit. The manoeuvre unit is equipped with one motor to control the tilt function and one motor …
… tested in the test system.Experiments were made to identify how signals in the radio controller were mixed and translated before they were sent to the receiver, to be used to control the helicopter. This could later be used to translate the control signal from the …
<em>En studie i hur och var svenska ungdomar upptäcker och konsumerar musik ur ett mottagarperspektiv.</em>
… media and streaming services. The traditional media channels such as TV and radio are losing power compared to earlier generations but are still vital for music marketing when working in symbiosis with positive audience response. Most of the young people in our study use the …
Självständigt arbete i Teknisk Fysik
This report studies the possibility of using some sort of radio sender and transmitter in order to position skis lost in powder snow. It is concluded that a RF-solution on the 433 MHz frequency should be the most efficient. Different forms of directional antennas are examined …
