modulation without toolkit

[jeremyong]

Hi...i would like to find out if ASK and FSK can be done without the modulation toolkit ???

[Guillaume_B]

hello

yes of course but you must have some signal proccessing base !

for example far ask demodulation, you must use IQ signal, extract the module, find the symbol rate and synchronise your demodulator to match the symbol timing

for FSK this is the same principle the only change is you dont work with the module but with the derivated phase !

hope this can help you and sorry for my bad english !

regards

[jeremyong]

Hi...is it the same for modulation??? as you were explaining on demodulation???

do you have any examples???

[Ujjval]

Hi Jeremyong,

Guillaume B. was referring to demodulation. Generating modulation waveform will actually will be little simpler as far as simple ASK and FSK generation goes.

For ASK all you have to do is based on the incoming bits, multiply a fix carrier frequency with corresponding amplitude value.

for FSK you will have to transmit a different frequency signal as per the incoming bits

However demodulation wont be that simple as modulation.

There is one cute reason why people in communication domain use IQ data. 🙂

All the information of a signal can be obtained from just amplitude values of I and Q signals. You dont have to bother about the frequency or phase of the signal for even if they are FSK and PSK signals respectively. Not only signal processing base, you will require a lot of communication knowledge also.

I would strongly recommend you to use the modulation toolkit unless you have a lot of free time to play with things around.

Good Luck! 

Regards,

Ujjval