help about modunlate OOK

[bangbi]

hello everyone! I'm try to simulate OOK modulation. EX I have seri bits :[1 2 4 5 6 2 3 4 6]. i don't know how to modulate it by OOK.
you can tell me, how to do it and what shape signal.
thank you!

 

[tpetar]

hello everyone! I'm try to simulate OOK modulation. EX I have seri bits :[1 2 4 5 6 2 3 4 6]. i don't know how to modulate it by OOK.
you can tell me, how to do it and what shape signal.
thank you!

Hi Bangbi,

What You mean with "I'm try to simulate OOK modulation." ?

What you use, what simulator?
What compiler if uC is involved?
What module circuit?

OOK Modulation:

On-off keying (OOK) the simplest form of amplitude-shift keying (ASK) modulation that represents digital data as the presence or absence of a carrier wave. In its simplest form, the presence of a carrier for a specific duration represents a binary one, while its absence for the same duration represents a binary zero. Some more sophisticated schemes vary these durations to convey additional information. It is analogous to unipolar encoding line code.

On-off keying
https://en.wikipedia.org/wiki/On-off_keying



Best regards,
Peter

 

[bangbi]

hello,i don't good at English.
if seri signal is 1s and 0s. I'm ok
i want to know the shape signal of seri signal is [1 2 3 4 5] by OOK modulation

 

[tpetar]

hello,i don't good at English.
if seri signal is 1s and 0s. I'm ok
i want to know the shape signal of seri signal is [1 2 3 4 5] by OOK modulation

What is "1 2 3 4 5" ? Five bits of '1' in serie ?

Try this is MathLab

https://www.mathworks.com/matlabcentral/fileexchange/14328-digital-modulation

**broken link removed**


Best regards,
Peter

 

[bangbi]

thank a lot!
but i'm researching modulation OOK in optical communication, and i don't understand why performace of OOK is very bad.
this figure:

i refence :hulk.bu.edu/pubs/papers/2011/TR-2011-09-20.pdf‎
thanks all for help

 

[tpetar]

Read these documents:

A COMPARISON BETWEEN OOK/ASK AND FSK MODULATION TECHNIQUES FOR RADIO LINKS
**broken link removed**


Optical Modulation Methods
**broken link removed**




Best regards,
Peter