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ASK,FSK or PSK for less bandwidth, lower error probability, lower circuit complexity

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electronics_kumar

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which is better candidate for application involving less bandwidth ,less probability of error,circuit complexity
 

Pont de Pedra

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ask fsk

Hi electronics_kumar:

For radio sistems narrow band (12,5 or 25 Khz)
-ASK. Simple and cheap (ususally AM systems)
-FFSK. Reliable and very good BER.
-PSK has a higher speed but perhaps is more dificult adjustment if you are using links betwen your diferent stations.

I hope this helps a bit.
 

emadi

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ask bandwidth

It is better for you study of a digital communication book.
I prefer you studying (digital and analog communication systems) by k.sam shanmugam. It contains tables that compares thease modulation techniques and you can find most of your answers in it.
 

Bukitoo

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ask,fsk,psk

Hi!
The PSK modulation is the best talking about BER/Bandwidth. Of course is a little more complex than the other two (the implementation).

If you want that those modulations were "Continous Wave" Type, you will have a lot of more trouble implementing your circuits.

In other hand, you have the data transmition rate. If you want to do a low rate implementation, you can use a microcontroller to control some analog parameters of your circuit, to implement "complex" modulations.
 

xischaune

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ask psk

hi...
just a piece of advice

FSK------Bandwidth Heavy....lower error probability....complex
ASK------Bandwidth Efficient....higher error probability (noise)....not much complex
PSK------Bandwidth Efficient....error probability increases as with no of levels (data rate)...very complex
 

laocai

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ask fsk and psk

different system ,different choice
 

satyasri

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ask, psk, fsk

it is fsk
 

m_llaa

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fsk psk

hi
did u see bertool in matlab
type "bertool" in workspace
its may be useful and help u
 

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