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Re: [Discuss-gnuradio] USRP Tx Rate Conversion

From: Ed Criscuolo
Subject: Re: [Discuss-gnuradio] USRP Tx Rate Conversion
Date: Tue, 15 Apr 2008 17:04:09 -0400
User-agent: Thunderbird (Macintosh/20071031)

Wireless Monster wrote:
Hi Brian,
Thank you for your help. Looks good :)

So If I understood correctly I can do the following:

I set the USRP interpolator to 64, so the USRP sink will consume samples at a 2MS/s. I add the resampler just before with a ratio 16/13 so I it consumes samples with a 1.625MS/s rate. Just before that I have the GMSK filter with a interpolation factor of 6 so at the input it is consuming samples at the desired rate 270833.333 Samples/s.

At hat point can I send the samples (for example from a file with gr.file_source) and guarantee they will be treated as a 270.8333Ks/s stream? (assuming there will be enough samples to process)

Thank you again for your help!

Doesn't the resampler have to be followed by a low pass filter
to remove the aliased high frequencies that are introduced?

@(^.^)@  Ed

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