Hi friends,
I require a bit of help from you people. I want to know that when we have incoming & outgoing calls or sms in GSM,,a sort of signals are transmitted or received,what are those signals? Please help me if you have any related document or waveforms plz share with me.
When we receive or make any call near any radio or television, we usually hear kind of signals??are those signals interference, if yes then what kind of?? Are those signals useful in making any device??
I guess these signals are Radio frequencies transmission signals, and this type of transmission surely be detectable & useful in bugging or other applications.
These are not the noise signals but modulated signals, which when received by a receiver convereted to original signals after demodulation.
Surely I did mean that, same signals which we usually hear from TV speakers or radio speakers when we have calls or we make calls.
I think those signals are modulated signals, which when combine with voice frequencies near TV or radio create interference. Those signals themselves arenot noise or interference.