On Wed, Mar 4, 2015 at 5:18 AM, SACHIN REGUNDWAR <[email protected]> wrote:
> Dear All, > > I am very new to GNU Radio and currently trying to explore the example grc > blocks available with the package. For example, I tried to execute the > example given in the example folder as "dpsk_loopback.grc" > (/home/ubuntu/examples/digital/demod/dpsk_loopback.grc). I have following > doubts: > > 1. There is no readme or document available which can explain about the > total block or example in detail. Can I get any tutorial/document which > will give complete info about all such examples?? i.e.Each grc example file > to be explained in detail. If any such details are available, kindly give > me the link for the same. > Nope. The examples show you how to use the various blocks but don't have write-ups on their own. You can find what each block does in the manual: gnuradio.org/doc/doxygen > 2. In the subject example, there is a signal source which is generating a > cosine wave from 500Hz to 5KHz. This cosine wave after the throttle block > is fed to packet encoder. Here, what is the role of packet encoder?? In the > packet encoder block properties there are many fields like > "samples/symbol", "bits/symbol", etc. These fields are generally related to > data, not the analog signal which is fed to it. How does the packet encoder > take cosine wave and use the fields like samples/symbol and bits/symbol??? > Do we have any document which will explain in detail about all such > blocks??? > It is a bit strange, I'll admit, but that sine wave is just digital samples that are shaped like a sine wave. So passing them through as digitally modulated samples is the same as passing any value. > 3. I want to analyze the output of packet encoder. How is it possible?? > Which block will you suggest to analyze the output??? > There are plenty of display widgets (QT or WX) that you can use here. Or dump it to a file and analyze the raw bytes anyway you know how. > 4. As I am very new to the GNU field and I quite poor in software domain, > I would like to get some help in the beginners level. Please provide me any > link, if it is available. > > Regards, > > SACHIN M. REGUNDWAR > Hyderabad, India. > To get a good feel for GNU Radio: http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials And for other reading: http://gnuradio.org/redmine/projects/gnuradio/wiki/SuggestedReading Tom
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