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https://github.com/dernasherbrezon/sdr-modem

Modem based on software defined radios.
https://github.com/dernasherbrezon/sdr-modem

fsk rtl-sdr sdr tcp

Last synced: about 2 months ago
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Modem based on software defined radios.

Host: GitHub
URL: https://github.com/dernasherbrezon/sdr-modem
Owner: dernasherbrezon
License: gpl-2.0
Created: 2021-02-25T20:15:51.000Z (almost 4 years ago)
Default Branch: main
Last Pushed: 2024-10-31T20:09:17.000Z (2 months ago)
Last Synced: 2024-10-31T21:17:50.107Z (2 months ago)
Topics: fsk, rtl-sdr, sdr, tcp
Language: C
Homepage:
Size: 3.66 MB
Stars: 31
Watchers: 3
Forks: 5
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

README

        ## sdr-modem

[![CMake](https://github.com/dernasherbrezon/sdr-modem/actions/workflows/cmake.yml/badge.svg?branch=main)](https://github.com/dernasherbrezon/sdr-modem/actions/workflows/cmake.yml) [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=dernasherbrezon_sdr-modem&metric=alert_status)](https://sonarcloud.io/dashboard?id=dernasherbrezon_sdr-modem)

Modem based on software defined radios.

## Design

![design](docs/design.png?raw=true)

## Features

 * TCP-based

 * Custom [binary protocol](https://github.com/dernasherbrezon/sdr-modem/blob/main/api.proto) based on protobuf messages.

 * Supported modulation/demodulation:

   * GMSK

 * Supported SDRs:

   * [sdr-server](https://github.com/dernasherbrezon/sdr-server)

   * [plutosdr](https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/adalm-pluto.html)

   * file

 * Misc:

   * Doppler's correction for satellites using SGP4 model

   * Save intermittent data onto disk for future analysis/replay

## API

 * Defined in the [api.h](https://github.com/dernasherbrezon/sdr-modem/blob/main/src/api.h)

 * And in the [api.proto](https://github.com/dernasherbrezon/sdr-modem/blob/main/api.proto)

## Configuration

Sample configuration with reasonable defaults:

[https://github.com/dernasherbrezon/sdr-modem/blob/main/src/resources/config.conf](https://github.com/dernasherbrezon/sdr-modem/blob/main/src/resources/config.conf)

## Dependencies

sdr-modem depends on several libraries:

* [libvolk](https://www.libvolk.org). It is recommended to use the latest version (Currently it is 2.x). After libvolk [installed or built](https://github.com/gnuradio/volk#building-on-most-x86-32-bit-and-64-bit-platforms), it needs to detect optimal kernels. Run the command ```volk_profile``` to generate and save profile.

* [libconfig](https://hyperrealm.github.io/libconfig/libconfig_manual.html)

* [libprotobuf-c](https://github.com/protobuf-c/protobuf-c)

* libz. Should be installed in every operational system

* libm. Same

* [libiio](https://github.com/analogdevicesinc/libiio) for plutosdr SDR (Optional)

* [libcheck](https://libcheck.github.io/check/) for tests (Optional)

All dependencies can be easily installed from [r2cloud APT repository](https://r2server.ru/apt.html):

```

sudo apt-get install curl lsb-release

curl -fsSL https://leosatdata.com/r2cloud.gpg.key | sudo gpg --dearmor -o /usr/share/keyrings/r2cloud.gpg

sudo bash -c "echo \"deb [signed-by=/usr/share/keyrings/r2cloud.gpg] http://apt.leosatdata.com $(lsb_release --codename --short) main\" > /etc/apt/sources.list.d/r2cloud.list"

sudo bash -c "echo \"deb [signed-by=/usr/share/keyrings/r2cloud.gpg] http://apt.leosatdata.com/cpu-generic $(lsb_release --codename --short) main\" > /etc/apt/sources.list.d/r2cloud-generic.list"

sudo apt-get update

sudo apt-get install libvolk2-dev libprotobuf-c-dev libconfig-dev check libiio

```

## Build

```

mkdir build

cd build

cmake ..

make

```