English

RPX-100

The Austrian Amateur Radio Society (ÖVSV) establsihes a new digital transmission procedure allowing high speed data communication in Sub-GHz Frequency bands. Requirements are to use a wideband transmission mode to support state of the art bandwidth for each user, and to enable multiple users at the same time to connect to a base station providing access to HAMNET. The implementation is be based on the concept of a software defined radio using commercial available hardware and open source software. This addresses and motivates a larger community of developers and radio amateurs. Hardware and software are designed as kit, the RPX-100, which allows a modular use and supports all possible Sub-GHz frequency bands. The Institute of Telecommunications of TU-Wien has successfully requested a permit to test operation of such a new digital communication system at 52-54MHz in the 6m band. Multi user access is achieved by using OFDMA as channel access methodology based on IEEE 802.22 (WRAN) standard. The project has been granted a funding from Amateur Radio Digital Communications (ARDC) in March 2022 following anevaluation by an international Grants Advisory Committee.

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