Amitava Ghosh

TL;DR: This paper proposes the use of outdoor millimeter wave communications for backhaul networking between cells and mobile access within a cell, and proposes an efficient beam alignment technique using adaptive subspace sampling and hierarchical beam codebooks.

TL;DR: New theoretical models for understanding the heterogeneous cellular networks of tomorrow are discussed, and the practical constraints and challenges that operators must tackle in order for these networks to reach their potential are discussed.

TL;DR: A general and tractable mmWave cellular model capturing these key trends and characterize the associated rate distribution is proposed and shows that, in sharp contrast to the interference-limited nature of UHF cellular networks, the spectral efficiency of mmWave networks also increases with the BS density, particularly at the cell edge.

TL;DR: This study presents a roadmap from the current cellular technologies toward fully MTC-capable 5G mobile systems, and provides a clear mapping between the main MTC service requirements and their associated challenges.

TL;DR: A tractable hybrid network model where the positions of mobiles are modeled by random spatial Poisson point process is proposed and derived analytical rate expressions are applied to optimize the two D2D spectrum sharing scenarios under a weighted proportional fair utility function.