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289 Commits 3 Branches 0 Tags 43 MiB
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23 Commits

Author SHA1 Message Date
Andreas Eversberg 3788b3e8a5 TACS support (variations added to AMPS code) 
These are:

- Bandwidth only 25 KHz, so lower deviations
- Data rate only 8000 KHz
- SID is called AID (Area ID)
- MIN1 coding is different
 2017-07-15 07:38:09 +02:00
Andreas Eversberg bb64c6b3ba AMPS: Add DTX support 
When DTX is enabled (-S dtx=2 or 3), a missing SAT tone causes the receiver
to mute audio and insert a low level of comfort noise.
Also the missing SAT tone will not cause the connection to be terminated.
 2017-06-10 13:08:19 +02:00
Andreas Eversberg 56024b384b AMPS: Serveral minor fixes 2017-05-23 18:11:10 +02:00
Andreas Eversberg 12dcc6c40f Minor fixes on AMPS messages 
- Flipping polarity is now performed after B/I has been applied
- Correcting sysinfo
 2017-05-17 20:06:43 +02:00
Andreas Eversberg 7e45f556ce Correcting all levels and move all remaining integer samples to sample_t 
The leves are based on the standards of each mobile network. They
are adjusted to the specified frequency deviation now.
 2017-02-18 21:01:13 +01:00
Andreas Eversberg bd7ccc5fa0 Add global DC-Filter and remove all individual DC-Filters 2017-02-18 21:01:12 +01:00
Andreas Eversberg 7ea3bc188d Move samples of int16_t format to sample_t, that is of type double 
This prepares the correction of all levels
 2017-02-18 21:01:08 +01:00
Andreas Eversberg 538a959128 Indexing tables by casting index to unsigned integer only 2017-02-18 21:01:06 +01:00
Andreas Eversberg a5fd375237 Fixed typos 2017-02-18 21:00:55 +01:00
Andreas Eversberg c5cf88ce57 Prepare for SDR: Add bandwidth and deviation info to sender instance 2017-02-18 21:00:47 +01:00
Andreas Eversberg 9ff8c3bb25 Rework on audio interface 
Sound instance is now called audio instance and uses funcation pointers.
This gives a clean interface to be exchanged with other technologies,
linke SDR.
 2017-02-18 21:00:45 +01:00
Andreas Eversberg 7585f9c22d Add function to change dsp state, more debug with channel info 2016-12-09 16:34:33 +01:00
Andreas Eversberg 63f39e105b AMPS: Fixes for multi transceiver support 
- Fix channel assignment
- Voice channel sends test tone when idle
- Changed paging timeout
- Minor fix of SCC field in 2 messages
 2016-10-30 09:37:14 +01:00
Andreas Eversberg bb92a1f3b0 AMPS: Add option to be more tollerant to sync detection 
Also it detects more false syncs, but this is ignored if decoding fails.
 2016-10-29 14:38:49 +02:00
Andreas Eversberg 052fe5d1de AMPS: Improved level detection of bit decoder 2016-10-29 14:38:46 +02:00
Andreas Eversberg 27938d111e Added and fixed extra compiler warnings 2016-10-07 08:55:18 +02:00
Andreas Eversberg ad3c88e064 AMPS: Callref is moved completely to transaction object 2016-10-02 09:06:04 +02:00
Andreas Eversberg 6a5af9aeac Typos: acknowledgement -> acknowledgment signalling -> signaling 2016-07-24 12:31:08 +02:00
Andreas Eversberg 2ee51022f4 Rename 'compander' to 'compandor' 2016-06-20 19:37:56 +02:00
Andreas Eversberg 86daa5a64a AMPS: Add option to use the BUSY/IDLE bit on FOCC 2016-06-20 17:16:46 +02:00
Andreas Eversberg 76f6285846 AMPS: Show round trip delay of Filler frames in loopback mode 2016-06-20 17:15:42 +02:00
Andreas Eversberg 673aa74e6c AMPS: Various minor fixes 2016-06-19 11:03:59 +02:00
Andreas Eversberg d2c4ca4fa9 Implementation of Advanced Mobile Phone Service (AMPS) 2016-06-17 17:03:29 +02:00