Investigating the Effects of Delay in FSK Modulation Technique Using Simulink

This paper presents a model-design based approach of investigating the effects of delay in frequency shift keying (FSK) modulation techniques in a digital communication systems.. Living In the Era of communication everything may be video, audio or any information in the form of electrical signal is termed as data and there is an enormous requirement of data transfer between two or more points through the world wide web, every moment of the clock, which is a big threaten to the existing communication systems because of the problems like spectral congestion, severe adjacent & co-channel interference problems and noise corrupted data reception etc. FSK has several advantages over ASK due to the fact that the carrier has a constant amplitude. These are the same advantages present in FM which include: immunity to non-linearities, immunity to rapid fading, immunity to adjacent channel interference, and the ability to exchange SNR for bandwidth. In this work, model-design based approach using Matlab/Simulink was employed. The FSK modulation network was designed, Delays were introduced and the effects were investigated and analyzed. It was observed that for important data transmission, with accurate data synchronization a tapped delay can be used either before modulation or after modulation because it is less prone to delay time interval.