42 lines
1.8 KiB
Markdown
42 lines
1.8 KiB
Markdown
[![CC BY-NC-SA 4.0][cc-by-nc-sa-shield]][cc-by-nc-sa]
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# LinHT-hw
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Open-source hardware, Linux-based, SDR handheld transceiver. [OpenHT](https://github.com/M17-Project/OpenHT-hw) successor with greatly simplified hardware - no FPGAs involved.
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This project offers a replacement board for the Retevis C62 radio, greatly expanding its capabilities.
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## Hardware
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The device uses an [MCM-iMX93](https://www.compulab.com/products/computer-on-modules/mcm-imx93-nxp-i-mx-93-som-smd-system-on-module) System on Module (SoM) running Linux. The RF front-end is based on the [Semtech SX1255](https://www.semtech.com/products/wireless-rf/lora-core/sx1255). The chip is used as a complete IQ modulator/demodulator, allowing for true all-mode support.
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### Resources
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**CPU:**
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- Dual-core ARM Cortex-A55 @ 1.7GHz
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- ARM Cortex-M33 coprocessor @ 250MHz
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- Floating Point Unit
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- ARM Ethos U-65 microNPU (Neural Processing Unit with Tensor Flow Lite support)
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**Memory:**
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- 2GB LPDDR4
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- 64GB eMMC
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**RF:**
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- 500kHz bandwidth complete IQ transceiver
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## Software
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Developers can use C/C++/Python as well as (or in conjunction with) GNU Radio flowgraphs. Tools such as gcc are built-in. The Linux image will be published later.
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### Supported modes (so far):
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* M17 - transmission and reception,
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* TETRA - reception only,
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* Demo 64QAM transmission at 2Mbps
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Other modes can be added later (analog FM/AM/SSB, FreeDV, APRS, etc.).
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## License
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This work is licensed under a
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[Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License][cc-by-nc-sa].
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[![CC BY-NC-SA 4.0][cc-by-nc-sa-image]][cc-by-nc-sa]
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[cc-by-nc-sa]: http://creativecommons.org/licenses/by-nc-sa/4.0/
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[cc-by-nc-sa-image]: https://licensebuttons.net/l/by-nc-sa/4.0/88x31.png
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[cc-by-nc-sa-shield]: https://img.shields.io/badge/License-CC%20BY--NC--SA%204.0-lightgrey.svg
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