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OpenWebRX: SDR Web Application for the Masses

Software Defined Radio technology is getting more and more popular among amateur radio operators and hobbyists, as different universal SDR hardware devices have become available recently. OpenWebRX is a software made for those who want to set up remote SDR receivers accessible from the web. It has been developed with open-source codebase, multi-user access and easy setup in mind, to be an alternative to other similar projects (WebSDR, ShinySDR, WebRadio, etc.) It supports cheap RTL2832U based tuners. Basically OpenWebRX is an on-line communications receiver for analog transmissions (AM/FM/SSB/CW), with a web UI on which real-time waterfall display is available. Users can select a channel within the bandwidth of the sampled signal acquired from the SDR hardware. The selected channel is demodulated on the server and the resulting audio is streamed to the browser of the user, where it is played back. Users can set receiver parameters (channel frequency, modulation mode, filter bandwidth) independently. The digital signal processing functions have been placed in a separate library, libesdr, which can also be considered useful as a standalone package. It performs the digital downconvers

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