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Re: [Discuss-gnuradio] Quadrature rate question

From: Martin Braun (CEL)
Subject: Re: [Discuss-gnuradio] Quadrature rate question
Date: Mon, 10 Dec 2012 13:40:13 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Mon, Dec 10, 2012 at 01:05:13PM +0100, Martin Braun (CEL) wrote:
> On Mon, Dec 10, 2012 at 09:44:29PM +1000, Phil wrote:
> > A recent post by Markus Gonser had me intrigued and so I
> > experimented with his grc code. The resulting FM receiver does work
> > but it doesn't quite sound right. My guess is that the quadrature
> > rate is not correct at 705.6kHz. Is this the correct rate and if
> > it's not what should it be?
> That depends. The quadrature rate is the rate of the incoming I/Q sample
> stream. 705.6 kSps seems unusual, though.

Actually, it's 16*44.1kSps, which isn't that unusual. Still, you need to
get that rate at the input.

Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin Braun
Research Associate

Kaiserstra├če 12
Building 05.01
76131 Karlsruhe

Phone: +49 721 608-43790
Fax: +49 721 608-46071

KIT -- University of the State of Baden-W├╝rttemberg and
National Laboratory of the Helmholtz Association

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