ca10048e5c
Rename filter -> iir_filter (file name and instance name)
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This is useful when using fir_filter in the future.
2017-05-15 21:46:32 +02:00
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
58ebc15292
Add test to measure performance of FM modulation and filtering
2017-02-18 21:02:53 +01:00
7e45f556ce
Correcting all levels and move all remaining integer samples to sample_t
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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
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This prepares the correction of all levels
2017-02-18 21:01:08 +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
57993e3e48
Support for UHD SDR interface
2017-02-18 21:00:49 +01:00
d447be5e26
NMT: Rework on FSK process, no more requirement for special sample rates
2017-01-07 06:28:20 +01:00
1ea95de120
C-Netz: Use emphasis with 200 uS time constant
2016-10-23 08:46:05 +02:00
038ce9d1b7
Add info key 'i' to show some states.
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Currently showing C-Netz attached subscribers
2016-08-03 12:03:49 +02:00
c273bbc5ff
Remove console line before printing debugging and on exit
2016-07-24 12:31:08 +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
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
2ee51022f4
Rename 'compander' to 'compandor'
2016-06-20 19:37:56 +02:00
42eefe90bf
common code: Fixed de-emphasis by adding high pass filter
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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
0c99848120
common code: Make preemphasis 0 dB @ 1000 Hz
2016-05-01 15:14:57 +02:00
4356c93afa
common: Add pre and de emphasis, if the radio does not support it
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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
2a092b8cf7
Fixing compander
2016-04-24 15:10:25 +02:00
Andreas Eversberg