From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from plane.gmane.org ([80.91.229.3]:43927 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751293Ab2CLBUH (ORCPT ); Sun, 11 Mar 2012 21:20:07 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1S6tvf-0002N7-Lr for linux-media@vger.kernel.org; Mon, 12 Mar 2012 02:20:03 +0100 Received: from p4ffe12dc.dip.t-dialin.net ([79.254.18.220]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 12 Mar 2012 02:20:03 +0100 Received: from steve by p4ffe12dc.dip.t-dialin.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 12 Mar 2012 02:20:03 +0100 To: linux-media@vger.kernel.org From: Steve Markgraf Subject: Re: SDR FM demodulation Date: Mon, 12 Mar 2012 02:09:36 +0100 Message-ID: References: <4F33DFB8.4080702@iki.fi> <4F36632A.3010700@iki.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit In-Reply-To: <4F36632A.3010700@iki.fi> Sender: linux-media-owner@vger.kernel.org List-ID: Hi, On 11.02.2012 13:46, Antti Palosaari wrote: > Now someone should make Linux driver that can tune that device to > different frequencies and look what it really can do. I sniffed the Windows driver and wrote a small libusb-based program [1], which can tune to a given frequency and record the I/Q-samples to a file. So far FM radio reception with GNU Radio, as well as GMR-1 satellite (Thuraya) reception [2] at 1,525GHz with 1,8MHz bandwidth have been tested. Despite the 8 bit ADC, the stick seems to perform quite well. The program so far supports the "ezcap USB 2.0 DVB-T/DAB/FM stick" with the Elonics E4000 tuner, and the "Terratec NOXON DAB/DAB+ USB-Stick" with the Fitipower FC0013 tuner. The code is still somewhat hackish and experimental, since not all of the demodulator registers are known, and especially the tuner setup has room for improvement. Regards, Steve [1] http://cgit.osmocom.org/cgit/rtl-sdr/ [2] http://gmr.osmocom.org/