cellular-infrastructure
/
osmocom-analog
9
1
Fork 2
Code Issues 12 Pull Requests 2 Projects Releases Wiki Activity

work on docs

This commit is contained in:
Andreas Eversberg 2017-12-05 20:36:11 +01:00
parent 1ef1b93776
commit 3ab5a3f6a9
5 changed files with 17 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
README
View File

@ -1,7 +1,9 @@
This software implements base station protocol of classic mobile phones. With
radio transmitter and receiver connected to one sound card and a headset
connected to another sound card, it is possible to make and receive calls to
and from mobile phone. Currently supported networks:
and from mobile phone. With SDR (software defined radio) it can be use without
radio equipment connected to a sound card, and even multiple channels can be
generated simultaniously using SDR. Currently supported networks:
* A-Netz
* B-Netz (ATF-1)
@ -9,7 +11,9 @@ and from mobile phone. Currently supported networks:
* NMT 450 / 900 (Nordic Mobile Telephone)
* AMPS (Advanced Mobile Phone System)
* TACS (Total Access Communication System)
* JTACS (Japanese version of TACS)
* Radiocom 2000 (French network)
* JollyCom (Unofficial network, invented by the author)
USE AT YOUR OWN RISK!
@ -49,6 +53,6 @@ providing memory cards to be programmed for older C-Netz phone.
Dieter Spaar providing TACS recordings to verify and debug TACS support.
Hans Wigger providing Radiocom 2000 recordings to reverse-enigeer the signalling
system.
Hans Wigger providing Radiocom 2000 recordings, to reverse-enigeer the standard,
which seems not to exist anymore...

2
docs/a-netz.html
View File

@ -23,7 +23,7 @@ History
<p>
A-Netz was the first mobile telephone network in Germany.
It existed between 1985 and 1977.
It existed between 1958 and 1977.
The first mobile units were huge and heavy and consisted of radio tubes.
Only big cars could carry these units in their trunk.
It used full duplex radio link.

4
docs/b-netz.html
View File

@ -58,7 +58,8 @@ This helped to lower the channel allocation time.
<center><img src="bird.png"/></center>
<center><a href="bnetz.wav">Listen to base station's idle sequence</a></center>
<center>Listen to base station's idle sequence:<br>
<audio src="bnetz.wav" controls></audio></center>
<p class="toppic">
<a name="howitworks"></a>
@ -137,7 +138,6 @@ All digit starts with sync pattern ("0 1 1 1 0").
|0 1 1 1 0|0 0 1 1 0|0|0 1 1 0 0| Wahlziffer 7
|0 1 1 1 0|0 0 1 0 1|0|1 0 1 0 0| Wahlziffer 8
|0 1 1 1 0|0 0 0 1 1|0|1 1 0 0 0| Wahlziffer 9
|0 1 1 1 0|0 0 0 1 1|0|0 1 0 0 1| Wahlziffer 2
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Sync

2
docs/index.html
View File

@ -36,7 +36,7 @@
</tr>
<tr>
<th>AMPS (USA) / TACS (UK / Ireland / Italy)</th>
<th>my ealy radio setup</th>
<th>my early radio setup</th>
</tr>
</table>
</center>

12
docs/sdr.html
View File

@ -145,11 +145,11 @@ Multiple Channels
<p>
Multiple channels can be useful, to keep the control channel, while establishing one or even multiple voice channels.
One nice things about SDR is that a spectrum is transmitted and not just one modulated carrier.
Because the carrier is actually generated in software, we can generate multiple carriers that fit in our bandwidth.
One nice feature of SDR is that a spectrum is transmitted and not just one modulated carrier.
Because the carrier is actually generated in software, we can generate multiple carriers that fit in our spectrum.
I suggest to have at least one channel space between channels you want to generate.
I suggest to use channel 1 and 3 or even channel 1 and 4 for NMT system.
The software will notice you, if the channels wont fit into the bandwidth.
The software will notice you, if the channels wont fit into the spectrum.
In this case increase the sample rate (-s) to generate a wider spectrum. (--sdr-samplerate must not need to be changed)
</p>
@ -161,7 +161,7 @@ I suggest to stay below 60% for each threads.
</p>
<p>
Example: C-Netz<br>
<b>Example: C-Netz</b><br>
Two channes are created, one the OgK (control channel) and one SpK (speech channel).
The distance between channels is 20 KHz (two channels).
Because C-Netz uses only odd channel numbers for 10 KHz spacing, we use channel 131 (OgK) and 135 (SpK).
@ -180,8 +180,8 @@ Because C-Netz uses only odd channel numbers for 10 KHz spacing, we use channel
</pre>
<p>
Example: Test TV signal<br>
Give PAL 'FUBK' test image on TV channel 21.
<b>Example: Test TV signal</b><br>
Transmit PAL 'FUBK' test image on TV channel 21.
</p>
<pre>