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Development of an SDR Recorder


In order to understand what the utilization of the radio spectrum looks like in practice and to test the function of the new protocol in the future, we have developed a transportable SDR device (Software Defined Radio). The device is intended to record radio signals in the form of raw data (I/Q samples) for later analysis.


The use of standard components enables rapid, cost-effective development. We use a Raspberry Pi 4, a 512 GB SSD hard disk and an Airspy SDR dongle, which are housed together with a battery in a 3D-printed housing.



A display is mounted on an additional board specially developed for the device so that the user can see and control the status of the device, as well as a GPS module with an integrated antenna (top left) to link the recorded radio signals with precise time stamps.


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