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
f689244f98
C-Netz: OgK must be on first channel, so sync works correctly
2017-02-18 21:02:56 +01:00
438ce08add
SoapySDR support
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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
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
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
faa3dfb7d4
C-Netz: Make average to clock measurements for a quicker result
2017-02-18 21:01:19 +01:00
8cb0187133
C-Netz: Remove the obviously useless noise function for unused timeslots
2017-02-18 21:01:17 +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
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
ac0da3f76e
Filter improvement: LP and HP filters, added test function
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The -3 dB level at cut-off frequency is now maintained for multiple
iterations.
2017-02-18 21:01:04 +01:00
2d8d7e62c1
Use global init/cleanup function
2017-02-18 21:00:58 +01:00
a5fd375237
Fixed typos
2017-02-18 21:00:55 +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)
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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
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
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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
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
3400f555fe
Add common function to give hotkey help
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* 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
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
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* 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
b1c452cf12
Changed command line options
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* 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
2a4abc62b2
Move realtime scheduling and signal handling to common code
2016-11-13 06:37:56 +01:00
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
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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
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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
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
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Cellular networks use transaction instances, so callref is now member of
transaction object.
2016-10-02 09:06:03 +02:00
767daf73cd
C-Netz: Documentation of the call process in the source code
2016-08-13 15:22:28 +02:00
Andreas Eversberg
Andreas Eversberg