e3197eec42
Rename dbm0 (level) to speech (level)
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In mobile communications we use speech level instead of milliwatts.
The deviation (FM) is always based on speech level, not on 1 milliwatt.
2019-12-08 17:24:36 +01:00
b2c0b64b2d
Audio level of patterns were too loud.
2019-12-04 17:26:50 +01:00
4053677c76
Modem emulator for "Datenklo" with AM7910/AM7911 emulation
2019-11-29 15:58:59 +01:00
f95a1520bf
minor code cleanup
2019-11-29 15:58:59 +01:00
4a185a4307
Describe if audio device exists, but does not support both directions
2019-11-29 15:58:32 +01:00
5da09b4964
New color for options debugging
2019-11-29 15:58:32 +01:00
e6dd146b70
Bugfix: Correct handling of n in strncat()
2019-11-29 15:58:32 +01:00
0044988e16
FSK demodulator: Also report bits that have duration < 0.5
2019-11-29 15:58:32 +01:00
41f8066d2f
Add filter switch to FSK modulator
2019-11-29 15:58:32 +01:00
ee26e33e4d
Split FSK modem code into separate modulator and demodulator
2019-11-29 15:58:32 +01:00
6a7117ecf7
MTS/IMTS: (Improved) Mobile Telephone Service
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Implementation of the 0G Mobile Phone Network of US and Canada
MTS or IMTS mode is selectable, als well as 5 or 7 digit mode.
2019-08-30 17:17:10 +02:00
e443069fb5
Fixed performance issue with IIR filter
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Passing samples with zero value (0.0) causes very slow processing of
IIR filter on my test machine 'nuedel'. I don't know why.
To solve this, I add a very small number to each input sample.
2019-08-26 21:10:39 +02:00
8d0d57d2b9
Fixed an unitialized-buffer bug.
2019-08-26 21:10:37 +02:00
1e9cab4959
Fixed use-after-free bug (config file handling)
2019-08-26 21:10:34 +02:00
0f6348e479
SDR: Use greater offset from center frequency, if only one channel is used.
2019-08-26 21:10:31 +02:00
e0e8c7f469
Allow giving alphanumeric channels (Prepare for IMTS)
2019-08-26 21:10:20 +02:00
Martin Hauke
f5583953e6
Fixed many typos in output and source code comments
2019-07-15 21:14:52 +02:00
f243e3a626
Output ASCII art image after all init functions (inside main_mobile.c)
2019-06-30 14:51:01 +02:00
ea98b49372
SDR: Display DC line (center frequency) in the spectrum view
2019-05-30 21:08:23 +02:00
d82fff41cb
SDR: Move center frequenc (DC) away from channels
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If one channel is used, shift the center frequency down by half of the bandwidth.
If more channels are used, select a center frequency between two channels close to the center, but equal distance.
Show the spectum layout on startup.
This patch reverts b31bc0b37d
2019-05-30 21:07:41 +02:00
fd17cfac16
Minimum frequency must be 8000 Hz
2019-05-30 18:19:06 +02:00
b31bc0b37d
SDR: Move channel away from center frequency, to avoid bad RX
2019-01-02 15:57:54 +01:00
f8b836182f
Make run faster on ARM CPUs using fast math approximation
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Use --fast-math to use sine/cosine tables and approximate atan2.
2018-11-10 15:18:28 +01:00
393e54b817
Compandor: Remove unused option for unaffected level
2018-10-14 13:07:25 +02:00
d058927e2d
Rework of displaying supervisory info: NMT and AMPS
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Using lower rate to show debug info of supervisory signal.
Display supervisory info for NMT and AMPS at measurement display screen.
2018-08-31 20:05:38 +02:00
9454702944
SDR: Add presets for LimeSDR-Mini
2018-08-25 10:25:25 +02:00
f5c4557051
SDR: Fix level range of IQ date; must not exceed range of -1 .. 1
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LimeSDR mini (and maybe others) do not want IQ data to become a value below
-1 or above 1. This happens slightly when applying the IIR filter after
upsampling. To prevent this, we scale down the IQ level a little bit.
To test the problem:
- set the scale level to 1.0, so it does not take effect
- use LimeSDR mini
- use upsampling (sample rate differs SDR sample rate)
- run loopback mode 2 (-l 2)
- IIR filter must be initialized with 2 or more iterations to take effect
- check linear IQ graph; it will then plot dots inside the circle
2018-08-25 08:13:16 +02:00
8b1aa76168
SDR: Add clock source selection, untested yet
2018-06-24 11:36:56 +02:00
b89251ee1a
Fixed -t (--tone) option
2018-05-27 06:04:09 +02:00
6b04026488
SoapySDR: Flip initialization of RX and TX, so LimeSDR works with frequencies below 30 MHz
2018-05-21 19:39:09 +02:00
6e52be6158
Add real-time scheduling to osmotv and make it default for all base stations
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This is required to drastically reduce the latency of the thread execution.
2018-05-21 19:39:09 +02:00
ad4973cdca
Fix compiler warning in conjunction with strncpy
2018-05-21 19:39:09 +02:00
9d39ac393e
Update ImageMagick support to API version 7
2018-05-21 19:39:09 +02:00
5df7f92647
Refactoring command line option handling
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* Use own function to define and parse command line options
* Command line options can be defined by config file also
* --limesdr allows to auto-set required SDR option for LimeSDR
2018-05-21 19:39:09 +02:00
e74b7442c6
Make LimeSDR tune rx to tx frequency
2018-05-21 19:39:09 +02:00
bfacc6d232
Add 'osmoradio', an analog radio (FM/AM)
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This radio can be a receiver or a transmitter or both simultaniously.
2018-02-16 15:54:42 +01:00
45771bb309
Add libam, a library to do AM modulation and demodulation
2018-02-16 15:54:42 +01:00
df4c687ff1
Add libclipper, a library to 'smoothly' clip overdriven audio levels
2018-02-16 15:54:41 +01:00
49a05ee2bb
Improved audio (sdr) handling
2018-02-16 15:54:40 +01:00
e41badf850
Improved wave playback
2018-02-16 15:54:40 +01:00
3f92b0b3ba
Improved emphasis
2018-02-16 15:54:39 +01:00
e59ea04cd6
Improving and cleaning configure script
2018-02-16 15:53:48 +01:00
65d284403e
libwave: Use libdebug for debugging messages.
2018-02-15 08:00:19 +01:00
9e98578f3d
Make libdebug not depend on libdisplay
2018-02-15 08:00:19 +01:00
ee561f29c8
Minor debug message corrections
2018-02-15 08:00:18 +01:00
73c656eddf
Fix compiler warnings
2018-02-15 08:00:15 +01:00
e7016f9f02
Make sound card support (Alsa) optional
2018-02-15 08:00:15 +01:00
5c9964ff19
libdisplay: Removing dependency from libmobile
2018-02-15 08:00:14 +01:00
fd819d2f9f
Add JollyCom, a simple and experimantal mobile network
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This network that can be used with any radio and a DTMF transmitter.
2018-01-21 10:46:09 +01:00
6452a41996
Squelch improvement
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Continuously calculate noise floor and lower threshold level if less noise
was received. High noise or ongoing transmission during start of program will
not cause a threshold that is too far above the actual noise floor.
2017-12-09 20:46:16 +01:00
Andreas Eversberg
Martin Hauke