Wojciech Kaczmarski

Wojciech Kaczmarski is a Polish engineer working in digital communications and software-defined radio systems, contributing to the development of open digital radio protocols and open-source radio platforms, including work on the M17 digital voice project.

Work on open-source radio systems Kaczmarski's work has focused on the development of open-source software and hardware for digital radio communications. His projects have emphasized openly published specifications, permissive licensing, and community-driven development within amateur and experimental radio environments.

M17-related work has been presented at international amateur radio and technical events, including those supported by the International Amateur Radio Union. He has contributed to the development of LinHT, a handheld software-defined radio transceiver intended to support open digital communication systems. The project has been described in amateur radio and technical media, including a cover feature in the German amateur radio magazine CQ DL,

Other work In addition to his contributions to digital radio protocols, Kaczmarski has participated in work on longwave broadcast time signals. In 2023-2024, he and co-author Grzegorz Kaczmarek examined the PCSK225 phase-modulated time code transmitted on Poland's 225 kHz longwave broadcast signal, Polskie Radio Program I, and implemented an open-source decoder based on publicly available documentation. Their work clarified details of the signal format and associated error control codes.

Adoption and technical discussion Work associated with M17 and related platforms has been implemented in experimental and commercial radio equipment and has been the subject of technical discussion in amateur radio and software-defined radio communities. and amateur radio organizations, as well as academic and educational venues.