Re: fast pulse radio transmission
- From: Tom Bruhns <k7itm@xxxxxxx>
- Date: Tue, 13 May 2008 10:12:27 -0700 (PDT)
On May 8, 5:14 am, sergio108 <sergio...@xxxxxxxxx> wrote:
Hi All.
I want to find a transmitters-receivers or transceiver can be used in
our project.
We are developing a project where we need to send and receive random
asynchronous digital TTL pulses (5 to 10 microsecond wide) without
delay trough RF at a variable rate from 10000 (1e4) to 100000 (1e5)
pulses per second over 0.5-1Km area, these random pulses do not comply
with any standard like RS-232.
Better if the system is full duplex although half-duplex will work in
some cases.
We can use IC but radio modules seem to be easier to implement.
We are considering also to use wireless video,
One last think. We need to implement at least 3 simultaneous
transmission so we need 3 different frequencies
Regards
Sergio
I second what Bob wrote...let us know what you are actually trying to
accomplish and we can perhaps suggest other ways, better ways, of
doing it.
I would add some more questions: at the receiving end, how accurately
do you need to resolve the pulse width? Can the pulse be repeated, or
do you have only one chance to properly detect it and decode it?
Many (most??) RF transmitter/receiver ICs these days target specific
modulation schemes. It seems like what you want is just wide
bandwidth modulation that is capable of just two levels. You could
use either amplitude or frequency modulation: on-off keying, or
frequency-shift keying. The data rate and pulse width dictate the
required modulation bandwidth, which in your case is not extreme.
.
- References:
- fast pulse radio transmission
- From: sergio108
- fast pulse radio transmission
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