Befordransföreläsning för Furkan Keskin till Oavlönad docent

Welcome to the Promotion lecture by Furkan Keskin

Title: Trade-offs and Non-idealities in ISAC Systems: Embracing Impairments for Sensing

Abstract: 
Integrated sensing and communication (ISAC) has emerged as a cornerstone technology for 6G, enabling simultaneous data exchange and environmental sensing through shared spectrum and hardware. This talk begins with an overview of OFDM-based ISAC systems and highlights two fundamental trade-offs, the time-frequency trade-off and the spatial trade-off, arising from the choice of data constellation and beamforming strategy, respectively. We then discuss key differences between sensing and communication in the presence of non-idealities, with particular emphasis on phase noise (PN), inter-carrier interference (ICI) and inter-symbol interference (ISI). Building on the observation that such impairments in monostatic ISAC induce distinct signatures that convey valuable information about the geometric properties of targets (such as range and velocity), we propose a fundamental rethinking of their role from foe to friend. Rather than treating impairments solely as nuisances to be mitigated, we demonstrate how they can be exploited to enhance monostatic sensing performance, potentially surpassing even that of ideal, impairment-free systems, in stark contrast to their purely detrimental nature in communications. 

Welcome!

Furkan and Ragne