GR-SDDC

The Direct Sampling SDR's GNURadio Module for SDDC(software digital down converter).

Target Devices

• BBRF103
• HF103
• RX888
• RX888R2
• RX888R3
• RX999
• *** Supporting Direct Sampling Mode Only. ***

Installation

First you need to install the dependencies (see below).

Setup GNU Radio

These blocks require the GNU Radio 3.9.0.0 or new on Ubuntu 20.04.

Build GR-SDDC

Please build and setup GR-SDDC library to GNU Radio.

$ sudo apt-get install libusb-1.0-0-dev fftw-dev
$ git clone https://github.com/ourstarsjp/gr-sddc.git
$ cd gr-sddc
$ sudo tar zxfv ./lib_so/libsddc.so.tar.gz -C /usr/lib/
$ sudo ldconfig
$ sudo cp ./lib_so/libsddc.h /usr/include/
$ sudo cp ./lib_so/99-rf103.rules /etc/udev/rules.d/
$ sudo udevadm control --reload-rules
$ mkdir build
$ cd build
$ cmake ../
$ sudo make install
$ sudo ldconfig

Dependencies

Required dependencies:

• libsddc
• libusb
• FFTW

linux support of libsddc by vladisslav2011

• libsddc
• gr-osmosdr

Usage SDDC_source Block

1. Put sddc/SDDC_source Block & QT GUI Block on GNURadio Flow canbus.
2. Setup All Parameters of SDDC_source Block.
3. Sample Rate (Hz) : Select this from 32M, 16M, 8M, 4M, 2M.
4. firmware_path : SDDC_FX3.img's Full Path.
5. device_select : The 1st device is "0".
6. antenna : RX1 Only.
7. Setup a Sample Rate's Parameter of QT GUI Block.
8. Sample Rate (Hz) : SDDC_source Block's Sample Rate.

• SDDC_simple_sample.grc