analogcommunication
When listening to FM radio on mobile using 3.5 jack headphone , sometimes the name of current show or other "xyz" information are displayed, how is that possible?
How do analog signals contain that information and how does a mobile phone identify such data from all mixed signals and show that differently?
Your perfectly single-sideband suppressed-carrier modulated sinusoid certainly has a phase which can be measured. However, what you cannot tell is what the contributions of that measured phase from the audio input and the RF oscillator were.
There is another form of single-sideband modulation, in which not only one sideband but also the carrier component is transmitted. This provides a reference which can be used to synchronize the receive LO to the transmit one - normally done to insure exact tuning, but it would also give you the ability to recover the original audio phase.
It is also quite possible, especially with modern DSP gear, to transmit two separate audio channels, one on each side band. This is commonly called independent sideband modulation (ISB).
Many spread spectrum implementations are DSP based and capable of receiving multiple channels at once - GPS being a good example.
Make your own (readable) style, using well hand draw schematics, and embed some usefull information. Below is one of the best templates that I use.
...if I understand well.
Best Answer
The system responsible for this is called Radio Data System (RDS).
What you likely see is the Programme Service or Radio Text data.
Another very common use of RDS is the traffic function of in car radios, which always seems to assume that you need to hear the traffic news much louder than everything else on the radio.