3a54f46b81
C-Netz: Fixup debug output at database
7 years ago
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.
7 years ago
021c34a899
Add geo locations of A-Netz and B-Netz towers. (not exact location)
7 years ago
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.
7 years ago
bae12156a2
common code: Add input gain option
7 years ago
1ce67c14e9
C-netz: Tuning scrambler
7 years ago
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.
7 years ago
de0ce7ba98
C-Netz: Correct clear cause on clearing by mobile station
7 years ago
8b6b87d8cc
C-Netz: Lowest mobile station power by default
7 years ago
95f44e9840
C-Netz: Fixed typo
7 years ago
11302272ce
C-Netz: Minor fix on clock speed indication
7 years ago
97c9eee322
Fix display of correct program name
7 years ago
38692e430b
B-Netz: Calibration of tone levels on TX and RX side
7 years ago
11487eefe8
B-Netz: Minor fixes on signals
7 years ago
aae58d5a68
A-Netz: Calibration of tone levels on TX and RX side
7 years ago
b73894ac49
B-Netz / NMT: minor changes at signal detection
7 years ago
47dbf094d9
NMT: Changes in parity check
7 years ago
28e7f1e9d1
common code: Remove DC level before using Goertzel filter
...
A DC level degrades the quality of the filtered result
7 years ago
0c99848120
common code: Make preemphasis 0 dB @ 1000 Hz
7 years ago
16acdbf59d
Implementation of C-Netz (German mobile telephone system)
7 years ago
4b3e3385b5
common code: Fix sample rate conversion
7 years ago
4356c93afa
common: Add pre and de emphasis, if the radio does not support it
...
Connect to the oscillator of the transmitter - good girl!
You need to enable pre emphasis in this case.
Connect to the discriminator of the receiver - good boy!
You need to enable de emphasis in this case.
7 years ago
5062628e52
NMT: Calculate quality of sync sequence and drop in case of bad quality
...
This eliminates chance of findig a sync sequence in noise or speech
7 years ago
c0cd74ac85
NMT: Show levels of received frames
7 years ago
2a092b8cf7
Fixing compander
7 years ago
9de121109d
common code: Sample rate conversion now supports any rate above 8000 Hz
7 years ago
05402283df
common code: Add function request information, if timer is running
7 years ago
17a93b501b
NMT: Fix hint and list of traffic area configuration
7 years ago
4d84da31a8
Fixing timer handling
...
Usage of more than one timer caused a lock-up.
7 years ago
1146537d84
common code: Add feature to record received audio and replay it
...
-W <file.wav> writes a wave file of received audio
-R <file.wav> reads a wave file to feed into decoder
This way you can record a phone and later debug without a phone
and radio equipment.
7 years ago
0aa749d27b
WIP: NMT docs
7 years ago
a5db02775e
fixup debug class definition: rename DFSK and DAUDIO to DDSP
7 years ago
57caa536cf
Implementation of NMT (Nordic Mobile Telephoe) network
7 years ago
cbfc818cce
Add compander to common part
7 years ago
4ab1cd5026
Add DTMF coder to common part
7 years ago
3bee5e728a
bnetz: Allow calling the phone using '05' prefix
7 years ago
e9234e3926
anetz: Add release timer, so station keeps blocked for a while
...
This prevents other mobile phone or outgoing call to seize the
base station before the current phone releases the transmitter.
7 years ago
0dc81fe210
Prepare for NMT: Fixes and improvements at common code
7 years ago
287b914b56
bnetz: Simplifying 'telegramm' handling
7 years ago
d21be383a6
anetz/bnetz: Move option 'loss detection' from common code to individual code
7 years ago
9b8e359264
anetz/bnetz: Remove redundant code to enter idle state
7 years ago
946c9ce10a
initial git import
7 years ago
Andreas Eversberg