Date: Mon, 27 Aug 2012 12:27:21 +0200
From: Christian Buchner <christian.buchner(a)gmail.com>
For some reason, your CellSearch software worked the second time I ran
it. Here's the result for a scan in Munich. The two frequencies found
correspond to the operators O2 and Vodafone. Deutsche Telekom is
either not using the 800 MHz band here, or I happen to be out of the
reception range for this dongle.
Detected the following cells:
C: CP type ; P: PHICH duration ; PR: PHICH resource type
CID fc foff RXPWR C nRB P PR CrystalCorrectionFactor
449 796M -13.2k -47.7 N 50 N one 0.99998344473785039099
372 806M -13.2k -43.7 N 50 N one 0.99998362964129883235
I see that the received signal power is very low at -44dB, so it kind
of makes sense that these cells would not be detected every time you
run the program. I suspect that if you moved outdoors or used a tuned
LTE antenna, these cells would be detectable more reliably.
This software project is way cool! I am surprised how
precise my crystal is.
Now who's willing to extend the code to combine several dongles to
scan the full 10 MHz band and to analyze the allocated resources
signalled on the PDCCH so we can generate statistics on cell load and
number of UEs served?
Wow, I think that would be a major undertaking for these dongles! I
think that's a task best suited for the USRP and the OpenLTE project
:)
JP