Softrock sdr Rx . I rivende udvikling/forskning .

Hejsa.

Lige et pluk fra yahoo gruppen softrock40.

Det er rimeligt fedt :-) . Tony kb9yig kan være stolt over sine softrocks. Der er flere universitet i staterne der også bruger dem i deres undervisning.
Med et kit til ca 300-400.- Dkr.
Andre sdr rx/tx ville også kunne bruges eks. Lima med converter/transverter osv. De bruger sammen protokol som softrock ( DG8SAQ ). Der er allerede forslag fremme i gruppen om at skrive det ind i andre sdr programmer bla. SDRshape. Meget spændene hvad den udvikling føre til.Linket er måske nok for de lidt langhårede ;-) ..


Indsat tekst fra gruppen . desværre på udenlandsk .


73 vy oz5agk / Flemming




Hi all, Hi tony,

I am working as a research engineer in a EEE school in France and to help one PhD student to test his classification algorithm, I decided to use my formerly purchased Softrock Ensemble VHF as a starting point for the acquisition system. Basically what we did was :

- Retune the receiver to work on VOR band (108-120 Mhz more or less) (filter rework)
- Add a low-noise preamp;
- build a simple vertical dipole for this band,
- develop custom SDR application.

And we used the system, coupled with a kinetics ADS-B receiver, to track planes landing or taking off Paris Orly airport (ADSB was used to estimate plane position, to compute its angle toward receiver and transmitter)
We recorded echoes and Doppler shifted signal for more than 500 planes and trained the classification algorithm and ... it works ;-)
The system can now recognize with more than 80% sucess planes using signal received with the softrock and a PC...

So far the "recognition" code is not real-time and is working in Matlab.
I wanted to share this experience with you and send special thanks to Tony to suggest him to go forward...

Tony : not only your kits serve amateur radio over the world, but they also serve "science" :-)

we wrote a paper that will be presented in may in Radar 2012 in Atlanta.
You can download the full paper from this address : http://orbi.ulg.ac.be/retrieve/124911/17..._Pap er.pdf

Best 73 to all
from Sylvain F4GKR and Jonathan ON7JPD