[Discuss-gnuradio] All software radio system

[Jovan Mostanovski]

Hi group,
        As part of my major uni project I'm using software radio to create a
data communications network for long range HF transmission.

The problem is that to do make this system we only have 8 months, and it
has become evident that there is too much work involved in this project
when including all the real world testing.

Not only that, but we need to start working right away, and waiting
weeks to receive the USRP and other hardware required is no longer an
option.

I've come up with the idea to implement the whole system in software
initially, so that we can start working on it straight away, and this
takes real world testing out of the equation, because it is impractical
for us to test the system for transmissions between moving nodes
situated hundreds of kilometers apart. Also, we are only undergrad
students and just don't have the experience.

What I'm thinking of doing is something like this:

----------    ---------------    --------------------    
Protocol |--> |  Modulator  |--> | Freq conv to RF  |--> 
----------    ---------------    --------------------

-------------------------------     --------------------     ----------
| Simulation of doppler shift  |--> |Freq conv to IF   |-->  | Demod  |
| & multi path fading          |    |                  |     |        |
--------------------------------    --------------------     ----------

etc etc.......


Each part would be designed as a GNU Radio block, hence reuseable for
other application...

What are your opinions on this approach?