williamp/osmocom-analog
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0cec2f28be5e6890f60b333fd442f6cf72f69677
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47 Commits

Author SHA1 Message Date
Andreas Eversberg
0cec2f28be Add check if fromat at PDEBUG() is consistent (like printf) 
The bugs it found are fixed too.
 2016-10-07 07:52:17 +02:00
Andreas Eversberg
b205cfcf03 B-Netz: Work on pilot signal generation 
The pilot signal to switch to channel 19 can be:
 * a tone
 * a tone that is turned off (notone)
 * positive amplitude
 * negative amplitude
 2016-10-03 14:56:15 +02:00
Andreas Eversberg
17930af920 C-Netz: callref is moved completely to transaction object 2016-10-02 09:06:04 +02:00
Andreas Eversberg
8d7c7f4425 callref: Move callref from 'sender' to individual implementation of a, b, c-netz 
Cellular networks use transaction instances, so callref is now member of
transaction object.
 2016-10-02 09:06:03 +02:00
Andreas Eversberg
767daf73cd C-Netz: Documentation of the call process in the source code 2016-08-13 15:22:28 +02:00
Andreas Eversberg
7f786fc00a C-Netz: Fix missing callref assignment (MT call) 2016-08-07 17:20:06 +02:00
Andreas Eversberg
5182f70671 C-Netz: Documentation of some system informations 2016-08-07 17:17:38 +02:00
Andreas Eversberg
e484814c0a C-Netz: Add hack to increase voice deviation for some newer phone 2016-08-03 12:40:56 +02:00
Andreas Eversberg
3a7388ba7f C-Netz: Fixed some debugging output 2016-08-03 12:40:55 +02:00
Andreas Eversberg
2bd7c16baa C-Netz: Add support for extended frequency band. (October 1989) 2016-08-03 12:40:54 +02:00
Andreas Eversberg
e4079b8ce8 C-Netz: Fix release cause coding 2016-08-03 12:03:54 +02:00
Andreas Eversberg
038ce9d1b7 Add info key 'i' to show some states. 
Currently showing C-Netz attached subscribers
 2016-08-03 12:03:49 +02:00
Andreas Eversberg
c9012c7663 C-Netz: Release MT call, if mobile phone does not respond 2016-08-02 09:02:58 +02:00
Andreas Eversberg
eb85afa49c C-Netz: Use cosine-square ramp for better signal generation 2016-08-02 07:39:02 +02:00
Andreas Eversberg
ce7a98206a C-Netz: Move callref to transaction. Callref on SpK only when its busy. 
Only when busy, the channel has callref. This is required for audio
routing. During setup, the callref assigned to transaction and kept
there until release to/from upper layer.
 2016-08-01 19:17:13 +02:00
Andreas Eversberg
664f8c7ac0 C-Netz: retry call setup messages up to 3 times 2016-08-01 12:15:12 +02:00
Andreas Eversberg
b84a64f872 C-Netz: Autoselect polarity on all transceivers 2016-08-01 12:15:09 +02:00
Andreas Eversberg
77cd21e7c2 C-Netz: Fix transaction list corruption 2016-08-01 12:15:08 +02:00
Andreas Eversberg
f729b32745 C-Netz: Fixed multi-transceiver mode and show channel in various logs 2016-07-31 18:48:19 +02:00
Andreas Eversberg
6a5af9aeac Typos: acknowledgement -> acknowledgment signalling -> signaling 2016-07-24 12:31:08 +02:00
Andreas Eversberg
4745b29115 NMT: Caller ID support 2016-07-24 12:31:07 +02:00
Andreas Eversberg
f39ee2f15a common code: Add support for main loop handler 2016-07-09 11:27:02 +02:00
Andreas Eversberg
2ee51022f4 Rename 'compander' to 'compandor' 2016-06-20 19:37:56 +02:00
Andreas Eversberg
4d52f955b3 common code: Add processing interval option to decrese CPU usage 2016-06-18 19:33:08 +02:00
Andreas Eversberg
e10898c1e8 C-Netz: Minor cosmetic fixes 2016-06-18 08:05:18 +02:00
Andreas Eversberg
051cc81b13 C-Netz: Move transaction routines to seperate file 2016-06-12 16:11:20 +02:00
Andreas Eversberg
c933250685 Add dsp mode change fuction to A and B Netz, fixed NMT 2016-06-12 16:11:20 +02:00
Andreas Eversberg
1ceb3026dd Fixed link problem with alsa lib 
Thanx to Martin for pointing to this problem.
 2016-05-16 18:41:21 +02:00
Andreas Eversberg
90dbc0cbd7 C-Netz: Debug fixes 2016-05-15 20:44:07 +02:00
Andreas Eversberg
e9640c0cd8 C-Netz: Fix TX polarity selection 2016-05-15 20:43:49 +02:00
Andreas Eversberg
9ecb87f3e6 Fixing station ID command line parameter 2016-05-15 20:43:38 +02:00
Andreas Eversberg
7aa2445b47 Move amplitude (level) debugging to debug.c 2016-05-15 20:37:06 +02:00
Andreas Eversberg
60d9a7b496 C-Netz: Advice about requirement of emphasis done by software 2016-05-13 19:23:43 +02:00
Andreas Eversberg
46fa72894e C-Netz: Calibration/fix processing of tone levels on TX and RX side 
FSK and compander levels are adjusted.

Eliminate offsets between subsequent speech chunks. This is done by
high-pass filter. An offset is not passed to the filter.

Do correct audio processing chain:
 time compress -> compressor -> scrambler / pre-emphasis -> TX
 RX -> de-scrambler / de-emphasis -> expander -> time expand
 2016-05-13 09:37:03 +02:00
Andreas Eversberg
5a9c9c7401 C-Netz: Send 5280 Hz test tone on idle speech channel 2016-05-13 09:37:03 +02:00
Andreas Eversberg
3a54f46b81 C-Netz: Fixup debug output at database 2016-05-13 09:37:02 +02:00
Andreas Eversberg
e2a9c2c6a5 Automatic FSK polarity selection on TX side 
This is done by simulating two cells with different polarities.
On first message from mobile station, the cell with the correct
polarity is used, the other is disabled.

On RX side the polarity is not selected, since FSK decoder detects
polarity for every frame.
 2016-05-13 09:37:01 +02:00
Andreas Eversberg
57ba648ac4 C-Netz: Add tiny database to track if phones are online 
Reject calls, if not online.

Use an interval to check if the phones are still online.
 2016-05-08 15:53:00 +02:00
Andreas Eversberg
bae12156a2 common code: Add input gain option 2016-05-08 15:49:45 +02:00
Andreas Eversberg
1ce67c14e9 C-netz: Tuning scrambler 2016-05-08 15:49:29 +02:00
Andreas Eversberg
7434e21dc2 Multi transceiver support 
This can be multiple transceivers on multiple sound cards.

Two transceivers can be bundled on one sound device as well, using both channels.
 2016-05-08 15:48:13 +02:00
Andreas Eversberg
de0ce7ba98 C-Netz: Correct clear cause on clearing by mobile station 2016-05-08 15:47:01 +02:00
Andreas Eversberg
8b6b87d8cc C-Netz: Lowest mobile station power by default 2016-05-08 15:46:51 +02:00
Andreas Eversberg
95f44e9840 C-Netz: Fixed typo 2016-05-08 15:46:43 +02:00
Andreas Eversberg
11302272ce C-Netz: Minor fix on clock speed indication 2016-05-08 15:46:34 +02:00
Andreas Eversberg
97c9eee322 Fix display of correct program name 2016-05-08 08:11:35 +02:00
Andreas Eversberg
16acdbf59d Implementation of C-Netz (German mobile telephone system) 2016-04-24 15:19:00 +02:00