REMOTE CENTRAL LOCKING FOR AUTOMOBILES

Teoretični del te naloge bom začel s kratkim opisal nekaj dejstev o frekvenci ter o frekvenčnih pasovih v elektromagnetnem spektru (seveda bom tu osredotočen na tiste pasove kateri se uporabljajo za RF prenose signalov). V nadaljevanju pa še nekaj malega o osnovah modulacije signalov ter kratka predstavitev najpogosteje uporabljenih modulacij katere srečamo v povezavi z RF daljinskimi sistemi za prenos informacij. Po logičnem zaporedju po modulaciji sledi demodulacija in tako bom nekaj besed namenil tudi demodulaciji (to je t.i. sprejemna stran katera me v tej nalogi tudi najbolj zanima) ter o njenih glavnih sestavnih delih. Od tega trenutka dalje bo tema že počasni zašla v smer reševanja problematike, katera je glavna tema te naloge. Za mehek prestop iz teoretičnega na praktični del te naloge bo poskrbelo nekaj informacij o uporabljeni Adiuno razvojni plošči ter o njenem pripadajočem programskem okolju IDE. V temi izgradnja sistema za zajem in obdelavo RF signala pa se bom poglobil v samo srce problematike katera mi je bila naložena, da jo moram rešiti s to nalogo. Prvo bom na kratko opisal samo strojno opremo katero sem moral zgraditi, da sem lahko signal sploh pripeljal do mikrokontrolerja za nadaljnjo obdelavo. Ko bo signal pripeljan do mikrokontrolerja pa nastopi drugi del reševanja te naloge in to je gradnja programa za zajem in obdelavo signala ter posredovanje njegovega rezultata na neko vizualno napravo. V zadnjem delu pa sem prikazal še rezultate dobljene s pomočjo strojno/programske opreme, ter njihovo obdelavo na način, da je enostavna za dojemanje širšemu krogu bralcev te naloge.The theoretical part of this work, I will start by briefly describing some facts about the frequency and the frequency bands of the electromagnetic spectrum (of course, I will focus here on those bands which are used for RF signal transmissions). Then followed some more about the basics of modulation signal and a short presentation of the most commonly used modulations schemes which meet in conjunction with RF systems for the transmission of information. Following a logical sequence after modulation followed by demodulation and so I spoke also about demodulation (this is also so-called receiver side in which I\u27m most interested in this work) and its main components. From that moment onwards, the theme will be already slow slide into the direction of solving the problem which is the main theme of this work. For a soft transition from the theoretical to the practical part of this work will provide some information about used Adiuno development board and on its associated development environment IDE. In section izgradnja sistema za zajem in obdelavo RF signala I looked into the heart of the problem which I have been accessed, that I have to solve in this task. First, I will briefly describe only the hardware which I had to build that I could signal even lead to microcontroller for further processing. When the signal is fed to the microcontroller is where the second part of solving this task, and this is the construction of program for the capture and signal processing and communication of its result on a visual device. In the last part I show the results obtained with the help of hardware/software and its processing in a way that is easy for the perception of a wider circle of readers of this work