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
07e45103ef
Work on docs
2017-05-17 20:06:45 +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
9d0e6b82b7
Work on docs
2017-03-04 06:34:04 +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
Andreas Eversberg