Thank you, Brian! Now i know how the interpolation changes, but if bitrate were set, how are interp/decim rate and samples-per-symbol derived respectively? Is there a default value for interpolation rate? Thanks!!!
Bill ----- Original Message ---- From: Brian Padalino <[EMAIL PROTECTED]> To: Bill Stevenson <[EMAIL PROTECTED]> Cc: [email protected] Sent: Friday, September 26, 2008 4:09:25 PM Subject: Re: [Discuss-gnuradio] how is interpolation rate dynamically set? On Fri, Sep 26, 2008 at 4:00 PM, Bill Stevenson <[EMAIL PROTECTED]> wrote: > Hello, everybody! > > I am working on the demo file: > gnuradio-examples/python/digital/benchmark_tx.py. In the file > transmit_path.py, it is said "specify bitrate. samples-per-symbol and > interp/decim will be derived." How are interp/decim rate and > samples-per-symbol derived respectively? what is the range for the variable > interpolation rate? Is interpolation rate increased as a multiple of 4? > could anyone tell me where i can find the dynamical range of interpolation > rate? Try the wiki: http://gnuradio.org/trac/wiki/UsrpFPGA#TransmitChain The interpolating CIC filter, I believe, can handle integers in the range [4,255]. The source can be found here: http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib Brian
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