baseband-devel June 2016

baseband-devel@lists.osmocom.org

8 participants
14 discussions

Openphone
by Madhu Macaque Labs 21 Jun '16

21 Jun '16

I am the project lead for the SHAKTI open source processor project. See bitbucket.org/casl This is a large Indian processor development effort that aims to develop a range of processors (from uController to high end servers) based on the RISCV ISA. We work closely with UCB and Cambridge as part of this effort. As part of our processor family, we have just started on a mobile SoC. The goal is to have an octa core SoC with the performance of a snapdragon 820 or the Apple A9. the CPU core is pretty much under control but we are exploring the DSP needed for running the lower levels of the 3G/LTE stack. Another group does LTE stacks and so we have complete testing equipment available to test for compliance. I am basically looking for co-conspirators who can help identify the components I can use from the osmocom stack and figure out what else we need to develop. Then of course we need to develop the DSP core. We are currently reusing the UCB vector processor and we are trying to figure out if a vector thread processor or a conventional DSP will do the trick. Our goal is to have am SoC that will the functionality of a basic smart phone but we do not intend to focus only on a basic phone with voice/data ca[ability but with basic display (even 4 line display is OK). Plan to use the AD SDR board for the SDR section. So it will be a large board that is not optimized for size. Any comments, thoughts appreciated . In case you are wondering, yes we realize this a mammoth task but we are well funded ! This is part of the India processor project. And most importantly all our work will be patent free open source. HW will be BSD, SW will be GPL3/2 -- Regards, Madhu

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Re: Sv: 2G repeater/booster w/ osmocom-bb? or 3G w/ osmocom-bb?
by Craig Comstock 20 Jun '16

20 Jun '16

I found a 1900 band analog booster/repeater to try. > On Jun 20, 2016, at 2:32 PM, Erich Dachleger <edachleger(a)yahoo.com> wrote: > > Does anybody know if it would be possible to use some of the old vodaphone-femtocells together with openbsc/osmo-bts? > RegardsErich > > Den Mandag, 23. mai 2016 11.46 skrev etienne . <etiennehelluy(a)gmail.com>: > > > Short answer: no & no > 1 - A gsm repeater is an analog device. With osmocom-bb phones you would need to demodulate/remodulate bursts. > This wi

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OsmocomBB on Openmoko GTA02
by Cosmin - Ioan PETRI?OR 18 Jun '16

18 Jun '16

Hi guys, I have a lot of problems using osmocom-bb with an Openmoko GTA02. First of all, I followed all the instructions from here [1] and uploaded layer1.highram.bin via external jack serial port (second tutorial). Well, after the firmware is downloaded on the phone osmocon prints: " Finished, sent 54 blocks in total Received branch ack, your code is running now! " and nothing is printed anymore. Moreover, I see no activity on the serial port, all LEDs on my USB adapter being off. When I try to run cell_log from my PC, it prints the following error message and blocks / does nothing: " Failed to connect to '/tmp/osmocom_sap'. Failed during sap_open(), no SIM reader <000e> cell_log.c:804 Scanner initialized Mobile initialized, please start phone now! " I've read about this error and figured out that it is not fatal, but still cell_log doesn't work, nor does the 'mobile' application. I tried the code from master and from sylvain/testing branch and I uncommented "CONFIG_TX_ENABLE". I even tried hello_world.highram.bin and that doesn't print anything after loading it. I don't know what to do anymore. [1] http://bb.osmocom.org/trac/wiki/OpenMoko#no1

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L1 power measurement logs
by Вадим Яницкий 17 Jun '16

17 Jun '16

Hello everyone! During power measurement process we can see some messages like: PM MEAS: ARFCN=8, 55 dBm at baseband, -83 dBm at RF If I understood correctly, in this example received signal has -83 dBm (about 5e-12 W) strength before amplifier and 55 dBm (about 316.2 W) strength after one. It looks like the strength of amplified signal should be printed as -55 (about 3.2e-9 W), because 316.2 W is very high value. Am I right? Or is it internal signal strength representation used by DSP? С наилучшими пожеланиями, Яницкий Вадим.

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baseband-devel June 2016