This project provides the necessary code to access the PrecisionWave BR-VBI SDR-Interface for IQ Data Streaming on Linux-Machines. More information about the hardware can be found here: PrecisionWave BR-VBI
Please note that IQ-Streaming requires an additional option on the receiver.
All relevant files can be found in the subfolder /api.
Public methods are defined in BRVBIControl.h:
- checkParams: checks Frequency, SamplingRate and BlockSize for valid values.
- init: initializes BR-VBI communication and measurement
- startStream/stopStream: control streaming
- getStreamData: returns interleaved 16bit IQ-Samples
Example.cpp provides an example for the API usage. This command line application records IQ-data from the BR-VBI into a file (16bit IQ interleaved).
BR-VBI IQ Stream Demo
Usage:
BRVBI2File [OPTION...]
-i, --ip-address arg IPv4 Address of the receiver
-c, --center-frequency arg Center Frequency [MHz]
-s, --sampling-clock arg Sampling Clock [Hz]
-a, --acquisition-size arg Acquisition Size [#Samples]
-f, --iq-file arg Target IQ data file
-b, --block-size arg Block size for file writing [#Samples] (default: 10000)
-h, --help Print usage\
To record a DAB signal with 2.048MHz sampling rate from channel 12C (227.36MHz) with acquisition size = DAB frame length = 96ms the following command works:
./BRVBI2File -i 192.168.1.71 -c 227.36 -s 2048000 -a 196608 -f dab_12c.iq -b 196608
The following instructions allow to build the sample application and provides help to write your own cmake application, using the BRVBI-API.
The software has been developped and tested on Ubuntu 22.04 LTS, it may run on all compatible platforms. The packages build-essentials and cmake are required to build the project:
sudo apt install build-essentials cmake
The following instructions can be used to build a Release-Build:
cd this/repo/location
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
cmake --build .