sir thank you for the reply.i really appreciate it coz i have idea now..
i have questions on the parts of the block diagram u mentioned i hope u will give me a chance to answer it sir..
what is the purpose of the carrier generator?and is it an oscillator?
bitstream,u mean the data sequence which is the switches that makes 1's and 0's state?
band limiting filter is a band pass filter sir?
next is a mixer circuit,is that the ask modulator circuit or what is it sir?
in the receiver sir,i have researched many articles and yes the combination of
" -->Envelope detector --> comparator with threshold --> Received Bitstream "
is the one they have mentioned..
im concerned with the transmitter side for now sir..thank you for the time sir..*** bless