Looks like our hardware is fast enough to handle TETRA and decode its ACELP codec in realtime. The system is not our main point of interest, but it was a very interesting experiment, testing our RF front end and signal processing capabilities.
Category: LinHT
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Demo LinHT M17 decode
I used my USRP B210 to transmit a reference M17 RF signal with the recently updated gr-m17. Here’s how LinHT decoded it. There is no signal parameter or RF front-end config display yet (receive/transmit frequencies, SRC and DST callsigns, etc.). For now, all of that data is available through SSH only.
LinHT decoding M17 RF traffic LinHT accessed over SSH: gr-m17 decoder’s debug output -
First LinHT tests
The future is here: LinHT booted up successfully for the first time. We believe that Software Defined Transceivers will be the next big trend in amateur radio.
LinHT is the most important hardware project in Amateur Radio today.
https://perens.com/2025/08/12/whats-wrong-with-ardc/
Bruce Perens, K6BPThe test device has no RF amplifier (although we will include GRF5604 RF amplifier in the next revision, see this). The output power of this test setup is around 5dBm. Frequency range: 420-450MHz (UHF).
While some doubted that such a design is even viable, we continued our work tirelessly. Big shout out to Vlastimil OK5VAS and Andreas OE3ANC. The project would not be possible without your help, guys.
Quick, preliminary LinHT preview. The device is open source hardware. The PCB design is available here.
Total cost for a prototype run:
– $490 for PCB+assembly at PCBWay (5 pcs.)
– Retevis C62 (donor)
– $469 for SoM, 5pcs.