Re: [Discuss-gnuradio] Spectrum sensing with RLT-SDR on Android WITHOUT Gnu Radio

[Vanush Vaswani]

Liquid dsp

On Thu, Feb 13, 2014 at 6:04 AM, Marcus Müller <address@hidden> wrote:
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> Hi Przemek,
> well, since this is the open source world, you shouldn't need to write
> everything from scratch.
> You can of course start off with Martin Marinov's source code,
> https://github.com/martinmarinov/rtl_tcp_andro-
> which will give you an tcp server serving samples (the code says it's
> a port of rtl_tcp from the rtl-sdr package); from there on it's java
> all the way down ;)
> However, I'd expect the average smartphone not to be the device you'd
> want to do FFT on, in Java, which doesn't even offer you access to
> your own memory, but then again I have no clue about android and if it
> offers any accelerators for stuff like that. Googling FFT Java turned
> up quite a bit, so I think you'd might be in luck ;) Generally, as I
> understand the situation with rtl_tcp_andro, you'll need C code to
> interact with the device (makes sense to me) and then you're free to
> use basically every C lib (and most probably even C++) you want within
> the restriction imposed by hardware and android, which, for signal
> processing, shouldn't be harsh.
>
> So: Happy hacking,
> Marcus Müller
>
> On 12.02.2014 17:37, Przemysław Pawełczak wrote:
>> Hello,
>>
>> This is my first post to this mailing list and my apologies if I
>> ask a lame/irrelevant question. Unfortunately, me and my hacking
>> friend could not find the answer to the issue we are trying to
>> solve (Google, etc.) so here is my post.
>>
>> We want to implement the most fundamentally simple spectrum
>> sensing algorithm (energy detector for example) directly on Android
>> device, where our raw I/Q samples are gathered through RTL-SDR
>> dongle ( http://sdr.osmocom.org/trac/wiki/rtl-sdr).
>>
>> Yes, we are aware of http://sdr.martinmarinov.info - but this is
>> not what we want. What we want is a set of functions (FFT, etc.)
>> that will do the signal processing/signal detection directly on
>> Android. Thus - we don't want (wish we could) any Gnu Radio
>> wrappers. Ideally - we look for Java-based implementation of the
>> thing described above.
>>
>> Thus - is there anything out there that we can use or we need to
>> write all from scratch?
>>
>> Best regards, Przemek
>>
>>
>>
>> _______________________________________________ Discuss-gnuradio
>> mailing list address@hidden
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>
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