How to get IQ samples from multiple rtl-sdr dongles in a synchronized manner?

Sylvain AZARIAN sylvain.azarian at gmail.com
Mon Sep 2 12:23:29 UTC 2013


Thanks.

sylvain


2013/9/2 Sdr Guru <sdrguru1 at gmail.com>

> The second way, use MLAT enabled dump1090
> https://github.com/antirez/dump1090/pull/23
> http://www.satsignal.eu/raspberry-pi/dump1090.html
>
>
> On Sun, Aug 25, 2013 at 4:13 PM, Jiao Xianjun <putaoshu at gmail.com> wrote:
>
>> Hi,
>>
>> I want to use multiple rtl-sdr dongles to do some multi-antenna
>> experiments.
>>
>> Is it possible to read IQ samples from multiple rtl-sdr dongles in a
>> synchronized manner?
>>
>> I already have a glance at dump1090 codes, which is a project using
>> rtl-sdr to decode aircraft broadcasting ADS-B messages in 1090MHz.
>>
>> Seems that I should use rtlsdr_read_async() instead of
>> rtlsdr_read_sync(), because that if rtlsdr_read_sync() is used, I have to
>> call it multiple times sequentially. That looks not synchronized.
>>
>> But rtlsdr_read_async() function only accept one rtl-sdr device as input
>> parameter, and it will be blocked after it is called. So seems that it also
>> can't be used for my purpose directly.
>>
>>  Also welcome any opinion on how to improve rtl-sdr lib/driver to support
>> this feature.
>>
>> Thank you.
>>
>> BR
>>
>> Jiao Xianjun
>>
>
>
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