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Software-defined open-architecture modems: Historical review and the NILUS approach

Flexible/adaptive modems that are reprogramma-ble/reconfigurable at all layers of the communication stack, either by a user or by means of autonomous decisions, are considered as an important enabler for interoperability and cognitive networking in the underwater domain. This paper reviews existing literature on software-defined open-architecture modems (SDOAMs) for underwater communications and networking, and zooms in on relevant R&D efforts currently taking place in a Netherlands-Norway defense cooperation.