Fwd: How to get out the maximum from cheap sdrs

Patrick Strasser-Mikhail oe6pse at wirklich.priv.at
Sun Feb 26 20:47:23 UTC 2017

Stefan Groißmeier 2017-01-10 17:37:
> That is why I'm searching a way to correlate the signals of the sdrs
> without hardware modification.

Just my 2 cents:

Intriguing idea, BUT (sorry...):

For corrleation you need a common time base, that is a common clock
source. That is not the case for multiple RTL-SDR dongles. Moreover you
need a stable and known phase relation (runtimes of the clock signal)
for your dongles.

The USB bus does not provide the clock for the dongles, so this is no
way to synchronize them

The key word here would be MIMO - Multiple In Multiple Out. That is what
WLAN 801.11n does, in one device.

I do not know if any of the currently availabe dongles have a clock
input (for a common source) or a clock output (to act as clock master)

73 de Patrick OE6PSE
Engineers motto: cheap, good, fast - choose any two
Amateur Radio Operator / Ham / Funkamateur / QTH: JN77rb
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Patrick Strasser-Mikhail OE6PSE <oe6pse at wirklich dot priv at>

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