Implementation of FSK Modulation on a PSoC Analog Coprocessor chip

Ovaj rad se bavi implementacijom FSK modulatora i demodulatora za potrebe prijenosa signala ljudskim tijelom na Cypress PSoC razvojnom sustavu. Odašiljač, tj. modulator, modulira prijenosni signal generirajući na svom izlazu sinusni signal više frekvencije, ako je modulirajući signal visoke logičke razine, odnosno sinusni signal niže frekvencije, ako je modulirajući signal niske logičke razine. Prijamnik, tj. demodulator, iz frekvencije primljenog signala rekonstruira poslanu informaciju. Modulator i demodulator uspješno su implementirani, ali je implementacija na ovom razvojnom sustavu, na frekvencijama i brzinama prijenosa za koje se može garantirati točnost prijenosa, prikladna samo za primjene u kojima brzina prijenosa nije od presudne važnosti.The subject of this thesis is an implementation of an FSK modulator-demodulator pair for use in intrabody communication on the Cypress PSoC development system. The transmitter, i.e. the modulator, modulates the transmission signal by generating a higher frequency sine wave if the modulating signal logic level is high, or a lower frequency sine wave if modulating signal logic level is low, at its output. The receiver, i.e. the demodulator, reconstructs the received information from the frequency of the received signal. The modulator and demodulator have been successfully implemented, but implementation on this development system is limited to applications for which high transfer rates are not necessary. By increasing the transfer rate, the error rate becomes too high, which is unacceptable in IBC, where transfer accuracy is of a great importance