20.500.12556/DKUM-38700 UČNI MODUL ZA KVADRATURNO AMPLITUDNO MODULACIJO LEARNING MODULE FOR QUADRATURE AMPLITUDE MODULATION V diplomski nalogi se bomo ukvarjali z modulacijo signalov v telekomunikacijskih sistemih. Poznamo več vrst modulacij, ki se uporabljajo za določeno namene: fazna, amplitudna, frekvenčna modulacija in kombinacija teh parametrov. Modulacije uporabljamo za prilagoditev koristnega signala različnim prenosnim signalom. Poleg tega modulacije omogočajo zmanjševanje šuma in interference, izbiro prenosnih kanalov na istem prenosnem mediju, multipleksiranje in povečanje zmogljivosti naprav. Digitalne modulacije se od zveznih razlikujejo le v tem, da so modulacijska stanja diskretna. Modulacijska stanja se medsebojno razlikujejo v amplitudi, frekvenci, fazi, času ali kombinaciji teh parametrov. Opisali bomo kvadraturno-amplitudno modulacijo (QAM), ki je bila razvita zaradi skupne uporabe ASK in PSK v enem moduliranem signalu. Z uporabo obeh je možna bolj učinkovita komunikacija. To pomeni, da je možno prenašati več bitov na simbol po prenosnih signalih. Ker je QAM-modulacija zelo kompleksna za implementacijo v vezju, jo bomo implementirali kot QPSK-modulacijo, kar je enako kot 4-QAM. We will study signal modulation in telecommunication systems in this diploma. There are several types of modulations, which are used for specific purposes, like phase, amplitude, and frequency modulations. We use modulations for adaptation of different signals to different transmissible signals. Moreover, modulations enable noise reduction and interferences, selection of transmission channel on the same data carrier, multiplexing and capacity increase of devices. Digital modulations differ from continuous modulations only in discreeter modulation states. Modulation states differ from each other in amplitude, frequency, phase, time or in combination of these parameters. We are going to describe quadrature amplitude modulation (QAM), which was developed because of common usage of ASK and PSK in one modular signal. Communication is more effective with the usage of both. That means that is possible to convey more bits per symbol on transmissible signals. Because the QAM modulation is very complex for implementation in circuit, we are going to implement the circuit as QPSK modulation, which is the same as 4-QAM. modulacijski sistem demodulacijski sistem QAM frekvenca faza amplituda prenos signalov modulatory system demodulatory system QAM frequency phase amplitude signal transmission true true false [P. Petrovič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2012-10-10 17:31:25 2012-11-30 14:03:59 2022-05-04 13:34:11 2021-04-18 03:16:11 2012 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.38:004.451(043.2) 16597526 URN:SI:UM:DK:HCZHARYT UNI_Petrovic_Primoz_2012.pdf UNI_Petrovic_Primoz_2012.pdf 1 E65CB24CC2ED924DD601FCE49E7739E0 9e3d84a84982156f18c7c32bdcc68f757a806c4b7b851727021c04d201e8bf6f 8a7cda48-7c08-11eb-bb7a-00155d0001ca 20.500.12556/dkum/8d2ee282-c7b9-452f-8537-a3d02aa86bf7 https://dk.um.si/Dokument.php?lang=slv&id=51904 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0