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Re: [Discuss-gnuradio] USRP Tx Rate Conversion
From: |
Brian Padalino |
Subject: |
Re: [Discuss-gnuradio] USRP Tx Rate Conversion |
Date: |
Mon, 14 Apr 2008 20:55:51 -0400 |
On Mon, Apr 14, 2008 at 8:03 PM, Wireless Monster
<address@hidden> wrote:
> Hi All,
>
> I am new to gnuradio and the USRP board and I have a basic question.
>
> I want to transmit a GSM signal. Once It is encoded I have a 270833.333
> symbols/sec signal. Then, it is up-converted (x8) and GMSK filtered, so I
> get a 2.1666 Ms/s complex signal.
>
> Now the question: How to adapt this rate to the DAC converter on the USRP
> board?
Well, if you don't use your x8 upconversion, you can get away with a
rational resampling (I believe).
Taking 270833.333, and upconverting by 3x makes the sample rate
812500. If you then rationally resample this by 16/13, you get a nice
1Msps signal which you can upconvert by a nice power of 2 for the
USRP.
Try it out and let us know how it works out?
Brian
- [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/14
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion,
Brian Padalino <=
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Brian Padalino, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Brian Padalino, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Dan Halperin, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/15
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/17
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Brian Padalino, 2008/04/17
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Wireless Monster, 2008/04/17
- Re: [Discuss-gnuradio] USRP Tx Rate Conversion, Eric Blossom, 2008/04/17