Software-defined underwater acoustic networks: toward a high-rate real-time reconfigurable modem

Emrecan Demirors, George Sklivanitis, Tommaso Melodia, Stella N. Batalama, Dimitris A. Pados
2015 IEEE Communications Magazine  
We review and discuss the challenges of adopting software-defined radio principles in underwater acoustic networks, and propose a software-defined acoustic modem prototype based on commercial off-the-shelf components. We first review current SDR-based architectures for underwater acoustic communications. Then we describe the architecture of a new softwaredefined acoustic modem prototype, and provide performance evaluation results in both indoor (water tank) and outdoor (lake) environments. We
more » ... environments. We present three experimental testbed scenarios that demonstrate the real-time reconfigurable capabilities of the proposed prototype and show that it exhibits favorable characteristics toward spectrally efficient cognitive underwater networks, and high data rate underwater acoustic links. Finally, we discuss open research challenges for the implementation of next-generation software-defined underwater acoustic networks. Reconfiguration timing constraints can be significantly relaxed due to larger channel coherence times in underwater communication (on the order of seconds) compared to wireless LAN communications (on the order of milliseconds). Relaxed timing constraints imply low power consumption, which is beneficial to battery operated underwater deployments.
doi:10.1109/mcom.2015.7321973 fatcat:zjl3faeuzjed3fr2yx6pdlslwu