Ahmad Bazzi

Current Research

Waveform Design for Integrated Sensing and Communications (ISAC) 6G Systems

6G is intended to foster a wide scope of services, spanning haptic telemedicine to VR/AR remote services and holographic teleportation with massive eXtended reality (XR) capabilities, as well as Blockchain, just to name a few. Therefore, 6G will go beyond communications, thanks to a key feature that is ISAC. Indeed, ISAC cooperation and convergence is an utmost topic that will serve as a door-opener for innovative applications in several domains such as the automotive sector, UAV sector, and robotics. Spectrum efficiency is one of the major virtues of ISAC, as the dynamics of sensing and communication can be “buckled up” within the same resource. An additional advantage is hardware resource sharing between radar and communication tasks, thus having both sensing and communication on a single platform will lead to reduced PHY-layer modem size and cost. All these merits give rise to a serious number of challenges and research questions that need to be addressed, such as efficient resource reuse and spectrum sharing, trade-offs between high communication rates and high-resolution sensing performances, privacy and security, and shared waveform design from a practical standpoint. In this project, we focus on practical waveform design, which puts forward dual-functional radar and communication base stations at the forefront of future 6G cellular networks. The main essence lies in providing efficient algorithms and designs through suitable optimization frameworks, enabling fruitful trade-offs, given the conflicting natures of the sensing and communication objectives. Even more, these methods should adapt to model uncertainties, such as situations with imperfect channel state information, and hardware imperfections, such as high power amplifier considerations.