Radio-frequency (RF) systems are converging in terms of spectrum allocations, equipment and waveforms toward united applications, in which each radio's operation is defined by programming software and firmware only. To fully harness the benefits of this so-called 'RF convergence', the emerging general-purpose multifunctional radio devices need to be capable of in-band full-duplex (IBFD), i.e., same-frequency simultaneous transmit and receive (SF-STAR), operation. For instance, a united cellular base station and radar would be transmitting shared downlink communication and radar waveforms while simultaneously receiving signal reflections for sensing its surroundings. The research investigates how to achieve the IBFD/SF-STAR capability for multifunctional radios under self-interference and how to exploit them in new RF convergence applications, e.g., joint radar sensing and wireless communication at millimeter-wave frequencies. More information: http://www.iki.fi/taneli.riihonen

2021

2026