Electro Magnetic Waves

S

sanalece

New Member

• Feb 11, 2010

• #1

Please describe, the detection and demodulation of OOK transmitted signal...! Unidirectional

The blocks and the circuit and its functional descriptions are expected....!

I will be more happy if there is 1 KM line of sight transmission is possible with the Transmitter.....!


Help me please

 

Last edited: Feb 11, 2010

Sceadwian

Banned

• Feb 12, 2010

• #2

Expectations are often not met.

 

S

sanalece

New Member

• Feb 13, 2010

• #3

Thank you for saying this....!

 

Hero999

Banned

• Feb 13, 2010

• #4

What's an OOK transmitted signal?

 

S

sanalece

New Member

• Feb 13, 2010

• #5

Hero999 said:

What's an OOK transmitted signal?

Click to expand...

on off keying only I knows

 

Hero999

Banned

• Feb 13, 2010

• #6

If only you know then why did you ask the question?

 

S

sanalece

New Member

• Feb 13, 2010

• #7

Hero999 said:

If only you know then why did you ask the question?

Click to expand...

Because of the variations in knowledge we are here...!

 

Last edited: Feb 13, 2010

Sceadwian

Banned

• Feb 13, 2010

• #8

You should easily be able to find many circuits available on the net for methods of detection and demodulation of OOK signals, they're extremely basic.

 

RCinFLA

Well-Known Member

• Feb 13, 2010

• #9

Most common method of demodulation is just a simple detector. Rectifying diode and filter. Filter set to pass bit rate of ON-OFF pulse width. In tech terms, a matched filter provide the minimum bandwidth to reduce noise while still being able the recognize the pulses. A comparitor with some hysterisis at output of filter will re-establish the square wave pulses.