d23672354f
Add option to set MNCC socket name (to run multiple base stations)
2017-06-10 13:08:26 +02:00
329463bb8c
SDR: Add option to give channel number
...
Using SoapySDR server allows to run different networks on multi channel
SDR devices.
2017-06-10 13:08:25 +02:00
aef4cf0997
Make spectrum display nicer by plotting continuous lines between samples
2017-06-10 13:08:24 +02:00
e0534db15c
Make spectrum display a little nicer by using '|' instead of ':'
2017-06-10 13:08:23 +02:00
e653475ff7
NMT: Allow NULL (B'0000') to be used as country selector in traffic area
2017-06-10 13:08:23 +02:00
57d4d1739e
AMPS/C-Netz: Correctly release pending transaction when creating a new one
...
If transactions is created, look on all channels for pending transaction
with same subscriber.
1. Remove that transaction.
2. Make channel return to IDLE.
3. Release call, if callref exists.
2017-06-10 13:08:22 +02:00
6adfcf7466
Status display
...
Alows to show status of current channels and users
2017-06-10 13:08:21 +02:00
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
2c1ab89723
Notify about usage of channels that are next to each other
...
It is required to have at least one free channel between channels, to
avoid interferences.
This is only a warning, it will not reject channels next to each other.
2017-05-24 14:01:25 +02:00
fc3b3e07be
Finetuning LOSS (noise) detection
...
The algorithm is still bad, but works in most cases
2017-05-24 14:00:08 +02:00
56024b384b
AMPS: Serveral minor fixes
2017-05-23 18:11:10 +02:00
76a3484c5c
C-Netz: Make demodulation algorithm (slope or leve) slectable via option
...
By default (auto), the algorithm is selected, depending on sound card
or SDR usage. For testing and debugging purpose, the algorithm can be
forced.
2017-05-19 19:11:59 +02:00
c086e66b7c
minor cleanups
2017-05-17 20:14:37 +02:00
0557bbbc43
SDR: Checking given parameters with a tollerance of up to 0.001
...
Rounding errors may cause given parameters to be changed a little.
When comparing the set-values with the get-value, a small amount
of tollerance must be allowed.
Thanx to Syvain, pointing to this bug!
2017-05-17 20:06:47 +02:00
683078a7a0
SDR: Spectrum display will not scale FFT result
...
Instead the greatest possible width that will fit into the window will
be used. This width is 2 to the power of N.
2017-05-17 20:06:46 +02:00
ef7ff26793
C-Netz: SDR now uses zero-crossing to detect level changes.
...
This does not work with analog radio, but with SDR it works.
The quality should be better and the process is faster.
2017-05-17 20:06:46 +02:00
9d87b5bf0f
C-Netz: Improved transmission of speech
...
The speech is now correctly ramped up and down during pause bits.
2017-05-17 20:06:44 +02:00
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
4d10ee7c82
No "sdr" audio device option required anymore (when using SDR)
2017-05-17 20:06:42 +02:00
ca10048e5c
Rename filter -> iir_filter (file name and instance name)
...
This is useful when using fir_filter in the future.
2017-05-15 21:46:32 +02:00
d03443c4f1
SDR: Added SoapySDR's compiler flags to common/Makefile
2017-05-15 21:46:30 +02:00
c04d046210
SDR: Fixed SoapySDR's arguments parsing
2017-05-15 21:46:30 +02:00
fbdb9ece01
SDR: Allow direct IQ TX and RX instead of fm modulating a list of channels
...
This is performed by reading and writing IQ data to "sample" pointer with
channel number set to 0.
2017-05-15 21:46:29 +02:00
65694f3b80
SDR: disable TX or RX by setting TX or RX frequency to 0
...
This way it is possible to use SDR simplex
2017-05-15 21:46:29 +02:00
6e0e0c9ce8
fixup Rework on audio buffer management
2017-05-15 21:46:28 +02:00
9dda9e1efc
SDR: Add option to set IF bandwidth. If not defined, sampling rate is used.
2017-05-15 21:46:27 +02:00
1445ca2fac
SDR: Add option to send (previously recorded) IQ data instead of TX data
2017-05-15 21:46:26 +02:00
369bda87a9
C-Netz: Improved decoder debugging
...
FM decoder debug output is now written to text files for better
debugging of process.
2017-05-15 21:46:25 +02:00
8e0d7d2513
samplerate.c: Allow transcoding to lower sample rate other than 8000 Hz
2017-03-04 16:52:20 +01:00
3fc4fc54be
main_common: Move init and cleanup function to main function
2017-03-04 07:12:12 +01:00
4201717f36
Rework on audio buffer management
...
Use function to get samples to be sent to fill audio buffers to a
level. This replaces the function that only shows how much data
is in the buffer.
This way the function itself can control how much data will be
sent.
2017-03-04 06:35:38 +01:00
2e1999b1ee
Start streaming of sound/SDR just before main loop
...
This prevents buffer overflow during init/creation processes
2017-02-25 07:09:53 +01:00
04fd1ddcea
Use thread to record and playback wave files without blocking
2017-02-25 06:29:09 +01:00
f689244f98
C-Netz: OgK must be on first channel, so sync works correctly
2017-02-18 21:02:56 +01:00
438ce08add
SoapySDR support
...
There is no time stamp handling. It is just TX'ing in advance and
synchronous to received RX rate.
2017-02-18 21:02:55 +01:00
17b6124122
C-Netz: Remove useless -V option
2017-02-18 21:02:54 +01:00
58ebc15292
Add test to measure performance of FM modulation and filtering
2017-02-18 21:02:53 +01:00
4de1e0188d
C-Netz: Add low pass filter to eliminate high frequency noise
...
This improves the FSK decoding quite allot, especially with SDR.
2017-02-18 21:02:52 +01:00
290b365d67
SDR: Move FM modulation algorithms to a seperate file
2017-02-18 21:02:51 +01:00
4c0f8e7e95
Rework of sample rate conversion by using linear interpolation
2017-02-18 21:02:51 +01:00
47f74b38ce
SDR transmits with full amplitude
2017-02-18 21:02:50 +01:00
6a3cfd608e
Add ascii-art spectrum analyzer for SDR support
2017-02-18 21:02:49 +01:00
3fb2ade352
C-Netz: Fix release of call process when no dialing was received from phone
2017-02-18 21:02:48 +01:00
0611f62b52
Show channel number and basic info when channel was created
2017-02-18 21:02:47 +01:00
5f1d7bc970
C-Netz: Improve clock speed measurements.
...
Sound card's clock measurements only requires a few minutes to get sub-ppm
accuracy results.
2017-02-18 21:02:46 +01:00
54ed5d5f82
AMPS: Fixed setting of signal polarity when using SDR
2017-02-18 21:01:19 +01:00
faa3dfb7d4
C-Netz: Make average to clock measurements for a quicker result
2017-02-18 21:01:19 +01:00
5026e161aa
Open audio device for call (headset) after everything is prepared
...
It is not allowed to stall after trigger reading of audio device.
2017-02-18 21:01:18 +01:00
8cb0187133
C-Netz: Remove the obviously useless noise function for unused timeslots
2017-02-18 21:01:17 +01:00
f5e9a97c31
--rx-gain option works now only with sound card
2017-02-18 21:01:16 +01:00
2b4f5bb228
Minor fix in help output
2017-02-18 21:01:15 +01:00
f72c53757d
B-Netz, NMT: Improved check for minimum required sample rate
2017-02-18 21:01:15 +01:00
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
bd7ccc5fa0
Add global DC-Filter and remove all individual DC-Filters
2017-02-18 21:01:12 +01:00
71e556e7ff
Work on emphasis filter: Neutral @ 1000 Hz; Use filter before de-emphasis
2017-02-18 21:01:11 +01:00
b3fd53b165
Test filter uses a dB graph to show the response graphically
2017-02-18 21:01:10 +01:00
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
538a959128
Indexing tables by casting index to unsigned integer only
2017-02-18 21:01:06 +01:00
23a42aeb2c
Fixed calculation of elapsed UHD RX time stamp
...
Now rates above 1000 RX frames per second works. The bug hit when there
were more than one frame received during one function call. This happens
if the frame rate is above the main loop rate of 1000 frames per second.
(default)
2017-02-18 21:01:05 +01:00
ac0da3f76e
Filter improvement: LP and HP filters, added test function
...
The -3 dB level at cut-off frequency is now maintained for multiple
iterations.
2017-02-18 21:01:04 +01:00
799b96c801
Fixed sleep interval in main loop
...
The elapsed time is calculated, so that it is removed from the sleep
time. This way the loop interval matches the given target.
2017-02-18 21:01:03 +01:00
a7e47f83d7
Fixed paging channel switching of B-Netz
...
Now the calling channel is switched correctly.
A global parameter is used to select how paging is performed.
2017-02-18 21:01:03 +01:00
21c5c3195d
Plot IQ data as red points on display, if overdriven (vector length >= 1.0)
2017-02-18 21:01:01 +01:00
c0e30d35d6
Use individual sample rate and setting for call device (headset)
2017-02-18 21:01:00 +01:00
19b396ab4d
Wave recording and playback now uses multi channels
2017-02-18 21:00:59 +01:00
2d8d7e62c1
Use global init/cleanup function
2017-02-18 21:00:58 +01:00
bc028cd4d3
NMT: Make supervisory signal default, also allow setting per channel.
2017-02-18 21:00:57 +01:00
272ebeb0ae
SDR: Minor fixes
2017-02-18 21:00:56 +01:00
a5fd375237
Fixed typos
2017-02-18 21:00:55 +01:00
bf0abd627d
A-Netz: Option to set gain of paging tones
2017-02-18 21:00:54 +01:00
d28467c125
SDR: Display IQ data as a plot using 'q' key
2017-02-18 21:00:53 +01:00
fee4846c3f
SDR forces default settings: emphasis and FSK polarity
2017-02-18 21:00:52 +01:00
8b9277615d
Neu structure for the paging process (B-Netz)
...
Paging tones are not created within sound_alsa.c
The audio API is now responsible to switch to paging channel.
In case of SDR, the sdr.c will switch frequency offset.
2017-02-18 21:00:50 +01:00
57993e3e48
Support for UHD SDR interface
2017-02-18 21:00:49 +01:00
b30b61282c
Generic SDR support
2017-02-18 21:00:48 +01:00
c5cf88ce57
Prepare for SDR: Add bandwidth and deviation info to sender instance
2017-02-18 21:00:47 +01:00
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
d54d3ac265
prepare audio handling for multi carrier SDR
2017-01-07 06:28:24 +01:00
713b1ab118
Rename functions and structure of biquad lowpass filter
2017-01-07 06:28:23 +01:00
d447be5e26
NMT: Rework on FSK process, no more requirement for special sample rates
2017-01-07 06:28:20 +01:00
2d0bc92cde
C-Netz: Make demodulation buffer size dynamic
2017-01-07 06:26:50 +01:00
a37dfe38ab
C-Netz: Fixed double free bug
2017-01-07 06:26:49 +01:00
e1cbb1649a
Fixed memory leak in PDEBUG(). Thanx to valgrind finding that!
2017-01-05 08:36:52 +01:00
286c11cab4
B-Netz: Add translation of emergency numbers 110 and 112
2017-01-02 17:38:54 +01:00
b59ce96889
B-Netz: Minor change on start image
2017-01-02 10:19:07 +01:00
16e1e842b9
A-Netz: Don't allow emphasis, since it is not used with A-Netz
2017-01-02 10:16:49 +01:00
e724823c5b
A-Netz: Reset tone detector when going idle
...
A pending tone must be detected as soon as the cell is idle. This happens
if the phone picks up during release guard time.
2017-01-02 10:13:43 +01:00
d47853201c
common code: Update call console only when it changes or after debug line
2016-12-11 14:21:22 +01:00
3400f555fe
Add common function to give hotkey help
...
* Key to dial and hangup
* Key to display wave form
2016-12-09 16:42:38 +01:00
7585f9c22d
Add function to change dsp state, more debug with channel info
2016-12-09 16:34:33 +01:00
f111c50478
A-Netz / B-Netz: Add function to change state, debug with channel info
...
Change state uses a function rather than directly setting state
variable.
Some debug commands now use channel number. (for multi-trx setups)
2016-12-06 17:47:58 +01:00
eed826387a
work on docs
2016-12-06 17:46:12 +01:00
27c6e3d860
C-Netz: Add code documentation...
2016-12-01 17:59:08 +01:00
e34d74aa23
C-Netz: Simplifying TX signal clock sync between two channels
2016-11-30 18:09:38 +01:00
Andreas Eversberg
0b43b63d1f
Fixed command line option descriptions
2016-11-29 10:59:09 +01:00
d52d0242bf
Output enhancements
...
* no more flicker on wave form display while scrolling
* dialing console gets cleared/overwritten correctly
* fixes on stderr output
2016-11-29 07:49:21 +01:00
938fb74bae
B-Netz: Fixes call procedure according to the standard FTZ 171 R 4
2016-11-27 22:06:47 +01:00
b1c452cf12
Changed command line options
...
* All lower case options define common options
* All upper case options define network specific options
2016-11-27 22:06:47 +01:00
f911717aa4
C-Netz: Minor coding style changes, no changes to process
2016-11-22 19:09:05 +01:00
0a83b19a99
common code: Display wave form in color
...
Show 0-line as blue and curve as green and channel number as white.
2016-11-17 19:38:36 +01:00
Andreas Eversberg
481181fa74
A-Netz: Click removal when changing sequenced paging tones
...
When tone changes to next tone, a transition of 2ms is performed. The last
tone is faded out and the new tone faded in.
2016-11-14 18:36:50 +01:00
5f5683e374
NMT: Fixed compiler warning
2016-11-13 06:42:18 +01:00
34954b50de
B-Netz: Rename special start digit for coin box phone type
2016-11-13 06:39:14 +01:00
2a4abc62b2
Move realtime scheduling and signal handling to common code
2016-11-13 06:37:56 +01:00
4dacec9ceb
A-Netz: Use Operator number 010 when calling from mobile station
...
Also use no caller ID (NULL). The call control code processes the
caller ID and dialed number correctly.
2016-11-13 06:04:54 +01:00
52b1ac65f4
A-Netz: Keep phase for each paging tone when played in sequence
...
If paging tones are played in sequence, only one tone out of four tones
is played at once. The phase of all tones are calculated as if each tone
would have been sent permanently.
2016-11-13 06:00:24 +01:00
6c1b6119ad
common code: Display multiple wave forms for each channel used
...
Use 'w' key to enable/disable RX wave form display.
2016-10-31 19:16:47 +01:00
ea32ab3fa3
B-Netz: Move 'telegramm' generation to seperate telegramm.c/h files
2016-10-31 18:21:26 +01:00
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
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
052fe5d1de
AMPS: Improved level detection of bit decoder
2016-10-29 14:38:46 +02:00
3a3c1c258b
AMPS: Show number of correct words (CRC) for each FOCC frame
2016-10-28 17:07:38 +02:00
c1a02a5029
common code: Fix double free bug
2016-10-28 16:55:39 +02:00
c6d3a41b81
C-Netz: Increment error counter only when trying to reach the phone
2016-10-23 11:50:02 +02:00
1ea95de120
C-Netz: Use emphasis with 200 uS time constant
2016-10-23 08:46:05 +02:00
8864db8269
C-Netz: Adjusting compandor response level
2016-10-23 08:45:24 +02:00
e763d3c6ed
C-Netz: Changing keepalive interval to 2 minutes and retry to 1 minute
2016-10-23 07:32:21 +02:00
33e0bc5f4e
C-Netz: Remove global variables, because they don't speed up anything
2016-10-07 09:14:22 +02:00
27938d111e
Added and fixed extra compiler warnings
2016-10-07 08:55:18 +02:00
8ef966aa21
C-Netz: Reset FSK decoder when switching channel mode
...
This prevents corrupt frames, as well as clear pending frames that
were received during the old mode, but may not be received during
the new mode.
2016-10-07 08:00:34 +02:00
eac595bd17
C-Netz: Don't access transaction after destroying it
2016-10-07 08:00:10 +02:00
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
b07509cf2d
AMPS: Correcting channel number range
2016-10-02 09:06:06 +02:00
ad3c88e064
AMPS: Callref is moved completely to transaction object
2016-10-02 09:06:04 +02:00
17930af920
C-Netz: callref is moved completely to transaction object
2016-10-02 09:06:04 +02:00
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
4c1c8eb6fb
NMT: Fix on paging retry
2016-08-28 15:29:13 +02:00
37ca463d98
NMT: Fixed channel coding for channels other than 1..9
2016-08-20 10:21:46 +02:00
8cecf13b1a
NMT: Add transaction handling
2016-08-20 09:57:05 +02:00
767daf73cd
C-Netz: Documentation of the call process in the source code
2016-08-13 15:22:28 +02:00
7d111546c4
Alsa: Keep 8 samples in input buffer to avoid reading corrupted samples
2016-08-13 15:19:12 +02:00
541eafe59e
Common code: Add call state debugging
2016-08-07 17:23:56 +02:00
362b1cbb61
Common code: Fix sound card reset
2016-08-07 17:22:24 +02:00
7f786fc00a
C-Netz: Fix missing callref assignment (MT call)
2016-08-07 17:20:06 +02:00
5182f70671
C-Netz: Documentation of some system informations
2016-08-07 17:17:38 +02:00
e484814c0a
C-Netz: Add hack to increase voice deviation for some newer phone
2016-08-03 12:40:56 +02:00
3a7388ba7f
C-Netz: Fixed some debugging output
2016-08-03 12:40:55 +02:00
2bd7c16baa
C-Netz: Add support for extended frequency band. (October 1989)
2016-08-03 12:40:54 +02:00
e69d74ac45
Send test tone towards mobile when no headphone sound device is selected
2016-08-03 12:03:55 +02:00
e4079b8ce8
C-Netz: Fix release cause coding
2016-08-03 12:03:54 +02:00
53814241b3
AMPS: Note about future callref handling
2016-08-03 12:03:53 +02:00
f15c0dfea3
NMT: Fixing audio level of supervisory signal to match 0.3 KHz deviation
2016-08-03 12:03:52 +02:00
55229a397c
NMT: Fix, stop ringing timer at answer
2016-08-03 12:03:52 +02:00
28ae3e300f
NMT: Fixed multi-transceiver mode and show channel in various logs
2016-08-03 12:03:51 +02:00
038ce9d1b7
Add info key 'i' to show some states.
...
Currently showing C-Netz attached subscribers
2016-08-03 12:03:49 +02:00
c9012c7663
C-Netz: Release MT call, if mobile phone does not respond
2016-08-02 09:02:58 +02:00
eb85afa49c
C-Netz: Use cosine-square ramp for better signal generation
2016-08-02 07:39:02 +02:00
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
1a3e536010
AMPS: Fix transaction list corruption
2016-08-01 13:06:03 +02:00
664f8c7ac0
C-Netz: retry call setup messages up to 3 times
2016-08-01 12:15:12 +02:00
b84a64f872
C-Netz: Autoselect polarity on all transceivers
2016-08-01 12:15:09 +02:00
77cd21e7c2
C-Netz: Fix transaction list corruption
2016-08-01 12:15:08 +02:00
0bc5ee553c
NMT: Fix SMS cleanup
2016-07-31 18:52:31 +02:00
cc8631d4f9
NMT: Give warning of missing channel type AFTER creating all channels
2016-07-31 18:48:20 +02:00
f729b32745
C-Netz: Fixed multi-transceiver mode and show channel in various logs
2016-07-31 18:48:19 +02:00
eb8a22e2c2
NMT: Fix SMS deliver output message
2016-07-31 14:49:43 +02:00
0593f7d066
Fix typos
2016-07-24 12:31:09 +02:00
6a5af9aeac
Typos: acknowledgement -> acknowledgment signalling -> signaling
2016-07-24 12:31:08 +02:00
c273bbc5ff
Remove console line before printing debugging and on exit
2016-07-24 12:31:08 +02:00
123979a0f3
NMT: Minor fix at debug output
2016-07-24 12:31:08 +02:00
8741833948
NMT: Change 'index' of message to 'mt' (message type)
2016-07-24 12:31:08 +02:00
5807a49f49
Release active call, when disconnect is received from network
...
If early disconnect is received, the connecion is kept established, so the
announcement can be heared by mobile subscriber.
2016-07-24 12:31:08 +02:00
4745b29115
NMT: Caller ID support
2016-07-24 12:31:07 +02:00
ba8bf0e9d5
NMT: Fix autoanswer
...
If phone does not support autoanswer, the MTX proceeds with regular ringing.
2016-07-24 12:31:07 +02:00
efb50532c6
NMT: Rework on frame (message) types
2016-07-24 12:31:07 +02:00
8906deb5dd
B-Netz: Added description for GFS 19 to reduce transmit power
2016-07-24 12:31:07 +02:00
5bbbe11666
B-Netz: Rework on dialing start digit: New unknown type added
2016-07-24 12:31:06 +02:00
b3b42e8bc4
Cleanup warnings at autoconfig files
2016-07-24 12:31:06 +02:00
a6bd841247
NMT: Various fixes for SMS support
2016-07-24 12:31:05 +02:00
3ef9ef88bd
B-Netz: Compiler switch to generate a dial sequence (for testing)
2016-07-24 12:30:56 +02:00
2137db0e01
NMT: Autoanswer for SMS/DMS calls
2016-07-09 15:16:17 +02:00
e7fa08b6df
NMT / SMS: Short Message Service support
2016-07-09 15:16:16 +02:00
64c829909b
NMT / DMS: User data facility support (required for SMS)
2016-07-09 11:27:24 +02:00
62b3712ce5
common code: Check and ignore events without callref set
2016-07-09 11:27:02 +02:00
f39ee2f15a
common code: Add support for main loop handler
2016-07-09 11:27:02 +02:00
26ab26db48
minor fix at MNCC socket
2016-07-09 11:27:02 +02:00
ab9aba1a84
B-Netz: Reply the station ID correctly
...
It must be replied right after it has been received the first time.
It does not matter if this happens a bit later, even a second later.
Thanx to Hans Wigger for providing recording from his B-Netz tester to
figure this out.
2016-07-06 16:19:01 +02:00
f3fd01ebcd
ALSA code: Fixed corrupted sample at the end of a read
...
The last sample may get corrupted. It seems that this depends on the
card that is used. To fix this, the snd_pcm_avail is checked and
one sample less than available is read using snd_pcm_readi. This
sample remains in RX buffer until next read. Then it is not corrupted.
2016-07-02 08:04:43 +02:00
2ee51022f4
Rename 'compander' to 'compandor'
2016-06-20 19:37:56 +02:00
86daa5a64a
AMPS: Add option to use the BUSY/IDLE bit on FOCC
2016-06-20 17:16:46 +02:00
76f6285846
AMPS: Show round trip delay of Filler frames in loopback mode
2016-06-20 17:15:42 +02:00
d851c37eac
common code: Release MNCC call 30 seconds after listening to announcement
2016-06-19 17:46:56 +02:00
b45b0c6bac
common code: Minor fix in main loop
2016-06-19 17:43:48 +02:00
f87e36fa47
AMPS: Detect difference between paging response and call response
...
Release call, if paging response was received, after call from fixed
network has already been released.
2016-06-19 17:41:42 +02:00
673aa74e6c
AMPS: Various minor fixes
2016-06-19 11:03:59 +02:00
4d52f955b3
common code: Add processing interval option to decrese CPU usage
2016-06-18 19:33:08 +02:00
e10898c1e8
C-Netz: Minor cosmetic fixes
2016-06-18 08:05:18 +02:00
d2c4ca4fa9
Implementation of Advanced Mobile Phone Service (AMPS)
2016-06-17 17:03:29 +02:00
7d5d3da8d3
Add function to display wave form from input/loop
...
Use 'w' to toggle display.
Move terminal input processing and main loop to main_common.c
2016-06-17 17:03:28 +02:00
1d20119d85
common code: Call control allows to re-dial after disconnect
...
No hangup key required before that anymore.
2016-06-12 16:16:37 +02:00
7cfd11eb17
common code: Add feature to select debug category rather than showing all
2016-06-12 16:14:29 +02:00
051cc81b13
C-Netz: Move transaction routines to seperate file
2016-06-12 16:11:20 +02:00
26593ed034
NMT: fix minor bug
2016-06-12 16:11:20 +02:00
4d22b11855
common code: Add debug #define for capture generated singal
...
Used for fundamental debugging of encoded signal
2016-06-12 16:11:20 +02:00
c933250685
Add dsp mode change fuction to A and B Netz, fixed NMT
2016-06-12 16:11:20 +02:00
997f8eda43
B-Netz: Add timer for switching back from calling channel
...
The timer ensures that the paging sequence is sent out by sound card before
switching back to traffic channel
2016-05-29 17:17:49 +02:00
1ceb3026dd
Fixed link problem with alsa lib
...
Thanx to Martin for pointing to this problem.
2016-05-16 18:41:21 +02:00
90dbc0cbd7
C-Netz: Debug fixes
2016-05-15 20:44:07 +02:00
50136d7e8a
NMT: Typo in channel list
2016-05-15 20:43:58 +02:00
e9640c0cd8
C-Netz: Fix TX polarity selection
2016-05-15 20:43:49 +02:00
9ecb87f3e6
Fixing station ID command line parameter
2016-05-15 20:43:38 +02:00
7aa2445b47
Move amplitude (level) debugging to debug.c
2016-05-15 20:37:06 +02:00
60d9a7b496
C-Netz: Advice about requirement of emphasis done by software
2016-05-13 19:23:43 +02:00
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
5a9c9c7401
C-Netz: Send 5280 Hz test tone on idle speech channel
2016-05-13 09:37:03 +02:00
bbab972b51
NMT: Fixup paging on other channel
2016-05-13 09:37:03 +02:00
69ccdb99b5
NMT: Calibration of tone levels on TX and RX side
2016-05-13 09:37:03 +02:00
27e8b03df5
Fixup typo on jitter code
2016-05-13 09:37:02 +02:00
42eefe90bf
common code: Fixed de-emphasis by adding high pass filter
...
This high-pass filter filters out DC and frequencies below 300 Hz.
Now de-emphases will not cause low frequencies to saturate audio level
range or cause too high levels on low frequencies.
2016-05-13 09:37:02 +02:00
3a54f46b81
C-Netz: Fixup debug output at database
2016-05-13 09:37:02 +02:00
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
021c34a899
Add geo locations of A-Netz and B-Netz towers. (not exact location)
2016-05-08 16:11:13 +02:00
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
bae12156a2
common code: Add input gain option
2016-05-08 15:49:45 +02:00
1ce67c14e9
C-netz: Tuning scrambler
2016-05-08 15:49:29 +02:00
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
de0ce7ba98
C-Netz: Correct clear cause on clearing by mobile station
2016-05-08 15:47:01 +02:00
8b6b87d8cc
C-Netz: Lowest mobile station power by default
2016-05-08 15:46:51 +02:00
95f44e9840
C-Netz: Fixed typo
2016-05-08 15:46:43 +02:00
11302272ce
C-Netz: Minor fix on clock speed indication
2016-05-08 15:46:34 +02:00
97c9eee322
Fix display of correct program name
2016-05-08 08:11:35 +02:00
38692e430b
B-Netz: Calibration of tone levels on TX and RX side
2016-05-08 08:11:17 +02:00
11487eefe8
B-Netz: Minor fixes on signals
2016-05-08 08:11:02 +02:00
aae58d5a68
A-Netz: Calibration of tone levels on TX and RX side
2016-05-06 07:05:52 +02:00
b73894ac49
B-Netz / NMT: minor changes at signal detection
2016-05-06 07:05:40 +02:00
47dbf094d9
NMT: Changes in parity check
2016-05-06 07:05:30 +02:00
28e7f1e9d1
common code: Remove DC level before using Goertzel filter
...
A DC level degrades the quality of the filtered result
2016-05-01 15:15:19 +02:00
0c99848120
common code: Make preemphasis 0 dB @ 1000 Hz
2016-05-01 15:14:57 +02:00
16acdbf59d
Implementation of C-Netz (German mobile telephone system)
2016-04-24 15:19:00 +02:00
4b3e3385b5
common code: Fix sample rate conversion
2016-04-24 15:18:59 +02:00
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.
2016-04-24 15:14:56 +02:00
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
2016-04-24 15:14:56 +02:00
c0cd74ac85
NMT: Show levels of received frames
2016-04-24 15:12:21 +02:00
2a092b8cf7
Fixing compander
2016-04-24 15:10:25 +02:00
9de121109d
common code: Sample rate conversion now supports any rate above 8000 Hz
2016-04-17 16:49:39 +02:00
05402283df
common code: Add function request information, if timer is running
2016-04-17 16:49:08 +02:00
17a93b501b
NMT: Fix hint and list of traffic area configuration
2016-03-27 17:56:04 +02:00
4d84da31a8
Fixing timer handling
...
Usage of more than one timer caused a lock-up.
2016-03-27 17:56:04 +02:00
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.
2016-03-27 17:56:04 +02:00
0aa749d27b
WIP: NMT docs
2016-03-26 17:35:20 +01:00
a5db02775e
fixup debug class definition: rename DFSK and DAUDIO to DDSP
2016-03-15 19:26:13 +01:00
57caa536cf
Implementation of NMT (Nordic Mobile Telephoe) network
2016-03-13 19:42:19 +01:00
cbfc818cce
Add compander to common part
2016-03-13 16:18:42 +01:00
4ab1cd5026
Add DTMF coder to common part
2016-03-13 13:38:35 +01:00
3bee5e728a
bnetz: Allow calling the phone using '05' prefix
2016-03-13 09:12:43 +01:00
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.
2016-03-13 09:12:26 +01:00
0dc81fe210
Prepare for NMT: Fixes and improvements at common code
2016-03-13 09:12:23 +01:00
287b914b56
bnetz: Simplifying 'telegramm' handling
2016-03-13 09:12:19 +01:00
d21be383a6
anetz/bnetz: Move option 'loss detection' from common code to individual code
2016-03-13 09:12:16 +01:00
9b8e359264
anetz/bnetz: Remove redundant code to enter idle state
2016-03-13 09:12:14 +01:00
946c9ce10a
initial git import
2016-03-13 09:12:11 +01:00
Andreas Eversberg
Andreas Eversberg