This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/OpenBSC@lists.osmocom.org/.
Tom Tsou tom at tsou.ccHi Marcus, On Tue, May 9, 2017 at 9:53 AM, Marcus Dias <vmarcusv at gmail.com> wrote: > Most BTS code I have, generate only one or two 200 kHz channels, but I need > to test a receiver using several (multiplexed) 200 kHz channels, composing > approximately 5 MHz of total bandwidth. This should be a "valid" multiplex > signal (correct and "decodable" control channel). Can anyone pointout where > should I start to put together the software to generate a binary file with > such signal? I guess I can inspect the code of a BTS that supports two TRX > (two 200 kHz channels) but I would like to double check whether there is a > more direct approach. It sounds like you need a raw IQ sampled binary file at about 5 Msps. Is that correct? There are a variety of methods to achieve this depending on your requirements. You could generate the multiplexed signal live with up to 3 adjacent ARFCN channels (800 kHz separation) with a B200 and osmo-trx with multi-ARFCN enabled. But, it sounds like you just need a test file, so you could post-process an existing single ARFCN signal file in Octave or Matlab to carry multiple versions of the same GSM signal. That may or may not be sufficient depending on your needs. -TT