communication ciruits

hi every one im student and im trying to built a communication system i just know the theory in brief could u all ols help me in practical approch

What type of communication system you want to desgin ?

more details will be useful so the guys here will gona help you

One approach - research amateur radio publications, particularly those available from Radio Society of Great Britain or the American Radio Relay League. While most consider radio amateurs to be just that - amateurs - the level of work and publications are far from amateurish.