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List:       gnuradio-discuss
Subject:    Re: [Discuss-gnuradio] OFDM / DAB demodulation
From:       Charles Swiger <cswiger () musicriver ! homeunix ! com>
Date:       2006-03-31 22:46:49
Message-ID: 1143845210.6219.3.camel () inspiron
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On Fri, 2006-03-31 at 17:08 +0200, Jens Elsner wrote:

> I sampled a local DAB radio station at 225.648 MHz, decimation factor 32
> with the USRP/tvrx.
> 
> DAB is using COFDM with pi/4-DPSK on 1536 subcarriers (see www.etsi.com, standard
> EN300401 for details). I wrote some Matlab code to demodulate the
> signal. The data is resampled from 2 MHz (URSP) to 2.048 MHz (DAB Standard).
> A frequency offset is compensated manually. 
> 

Side issue - do I understand this correctly, that Europe uses an open
published DAB standard while those near me in the US are not
freely published (Ibiquity, IBOC, hdradio, etc) ??

--Chuck





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