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[Discuss-gnuradio] FSK and GFSK signal decoding

From: Gunther Ferdinand
Subject: [Discuss-gnuradio] FSK and GFSK signal decoding
Date: Sun, 10 Apr 2011 03:49:51 -0700 (PDT)

   we have an USRP1 with a WBX card and we would like to get some data received on 433MHz from a homemade module. It sends a data packet each 5 seconds. The packet is constructed like this: <PREAMBLE><SYNC><HEADER><DATA LENGTH><DATA><CRC>, where DATA represents some information collected on that module. We intend to work on Windows not Linux, it much more user friendly. We don't really know how to start all this therefore we would appriciate any help. We installed UHD, GNURADIO and other needed things, but I couldn't find any help file with some explained examples. What could be easyer, to make some application (in C++, VisualBasic, etc.), to use Python or other solutions. Anyway when we will get data into the PC we need to do some math operations and display it.
  So, the biggest problem is that we don't really understand how we could get that data. We have that module that sends some packets. If we set the USRP1 through UHD to 433MHz (what other parameters should we set), when it will receive some RF signals it will starts to pass it to the application (run with python or made with other development softwares). The USRP will send some data (byte 1; byte 2; byte 3; ..... ) as many as it receives. From that data we will get out our DATA and check CRC, HEADER, etc.
  A help file would be very helpfull. Till now we have worked with many development softwares and with each one there were some kind of help files for beginners like us, to understand the basics. The problem is that we don't really undestand how UHD works, how could we use it with a VisualBasic environment for example. There's any such kind of help file or some web pages?
Thank you very much.
Gunther Ferdinand.

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