Thank you very much, your opinion is really helpful! Yes, GNURadio + USRP is an excellent simulation environment. I will consider again how to leverage it for my application.
发件人： Josh Blum <address@hidden>
收件人： address@hidden
发送日期： 2010/7/11 (周日) 1:08:46 下午
主 题： Re: [Discuss-gnuradio] May I use GUN Radio
without USRP
> I want to know may I use GNU radio without USRP.
>
Of course! Gnuradio can be a stand-alone simulation environment. And you can interface it with anything that you can write code for.
GNU Radio is...
* An API for creating signal blocks (C++/Python)
* A runtime environment for signal processing
* A library of signal processing blocks
* User scripts and applications
* Hardware drivers (USRP/USRP2)
* An application for creating flow graphs (GRC)
> I mean Since USRP is just used for transiver, ADC/DAC, converting RF signal to
> baseband and transmitting baseband signal to GNU Radio for processing, then may
> I produce baseband workload by an Agilent baseband signal generator or even
> Matlab, and then connect GNU Radio with signal generator or Matlab?
>
If you can write code in some language to acquire samples from lab equipment, then you can write a custom gnuradio block for that equipment. :-)
>
> The reason I am thinking about this is that from some analysis, I find the data
> rate of the USB2.0 bus limits the bandwidth of the base band signal to 8 MHz,
> which is not enough for my project. And My focus is just baseband signal
> processing, I want to save money on USRP if I can use existing equipments in the
> lab.
Can you test your application at lower data rates? Its usually a good idea to see that
1) you can implement the processing in simulation in the gnuradio environment
2) you can run the processing at a low rate on a platform like the USRP
2a) prove that the CPU can keep up at lower rates
2b) prove that the algorithm works in the presence of noise and frequency offsets
So usrp can be a valuable
part of your RF development even if you must replace it with a higher rate/more expensive device for delivery. Is the extra time spent integrating agilent equipment worth it if you find out that your algorithm cant run in real-time at lower usrp rates?
Hope that helps!
-Josh
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