Only Tetra decoding without SDR?

[jochenbrandt]

I have a question: I am searching for a software wich is alone working as a Tetra decoder. My idea is to use a raspberry pi3+ wich i will build in a all-band-receiver, like ICOM-IC R 7000. the decoder shall start, when i start my receiver. so it must be an bootable image. the technical things are not my problem. i am a technician and HAM operator. i never found like this in the internet, but it must be possible. the decoder only shall decode the audio stream over sound input. the output shall give the decoded voice.

 

[Ubbe]

Gnu Radio and Telive are linux tetra decoders but I believe they might need a more powerful CPU than the PI3+

/Ubbe

 

[jochenbrandt]

Gnu Radio and Telive are linux tetra decoders but I believe they might need a more powerful CPU than the PI3+

/Ubbe

I know telive and I have it. But that only works with an sdr-stick. I only search a decoder only with audio input.

 

[Ubbe]

But Gnu-Radio are built of different building blocks. Can't you design it to use an audio source as it has to use that after it has demodulated the sampled audio from the SDR? I will see if I still got Gnu-Radio somewhere to see what options there are.

/Ubbe

 

[ronenp]

Look for software called OpenEaer it have Audio input as source

 

[racingfan360]

TETRA will need a receiver that can cope with its 25khz RF bandwith, and provide a raw discriminator signal to feed something like OpenEar. I don't recall there being many options on the market to cover that....other than an SDR stick.

 

[DaveNF2G]

Here is what I found today on OpenEar's GitHub page:

i am sorry but Tetra Decoder temporality removed from this Software in regard of DMCA Takedown Policy about Tetra! i try solve this and then Tetra will be add again​

We need a developer in the US.

 

[morfis]

Here is what I found today on OpenEar's GitHub page:

i am sorry but Tetra Decoder temporality removed from this Software in regard of DMCA Takedown Policy about Tetra! i try solve this and then Tetra will be add again​

We need a developer in the US.

The message is possibly misleading. His software used several pieces of code from other authors but he didn't respect their open source licencing.

However, several versions of his binaries are still dotted around the interweb.

 

[pi9ajn]

Here is what I found today on OpenEar's GitHub page:

i am sorry but Tetra Decoder temporality removed from this Software in regard of DMCA Takedown Policy about Tetra! i try solve this and then Tetra will be add again​

We need a developer in the US.

Info on Youtube about OpenEar: Open Ear 1.7 For RTL-SDR: Convenient All-In-One Decoding of TETRA, DMR And POCSAG!
Read the description

 

[Ubbe]

Look for software called OpenEaer it have Audio input as source

Audio input are not available for Tetra in OpenEar, only for the lower bitrate protocols. You can record I/Q samples and then read that file in OpenEar.

/Ubbe

 

[kb9mwr]

European Telecom Body to Open-Source Radio Encryption System

The European telecom standards body behind a widely used radio encryption system will soon open-source its encryption protocols. The European Telecommunications

www.bankinfosecurity.com