4 papers
Jamming-Resilient Sparse Delay-Doppler NOMA: Unitary Precoding, Randomized Active Sets, and Superincreasing Power Allocation
Michel Kulhandjian, Hovannes Kulhandjian, Theodoros A. Tsiftsis
We propose a sparse delay-Doppler NOMA scheme resilient to intentional jamming. The transmitter places user data on a small random subset of delay-Doppler bins, spreads the result…
Spectral-Domain Spreading via Hadamard Transform for Robust Downlink Non-Orthogonal Multiple Access
Yaakoub Berrouche, Theodoros A. Tsiftsis, Michel Kulhandjian +1
Non-orthogonal multiple access (NOMA) systems allowing multiple users sharing the same resource block offer significant gains in spectral efficiency which can enable the required m…
AI-based Drone Assisted Human Rescue in Disaster Environments: Challenges and Opportunities
Narek Papyan, Michel Kulhandjian, Hovannes Kulhandjian +1
In this survey we are focusing on utilizing drone-based systems for the detection of individuals, particularly by identifying human screams and other distress signals. This study h…
Delay-Doppler Domain Pulse Design for OTFS-NOMA
Michel Kulhandjian, Hovannes Kulhandjian, Gunes Karabulut Kurt +1
We address the challenge of developing an orthogonal time-frequency space (OTFS)-based non-orthogonal multiple access (NOMA) system where each user is modulated using orthogonal pu…