Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Institution
Articles 1 - 3 of 3
Full-Text Articles in Engineering
Circularly-Shifted Chirps For Triple Functionality: Communications, Radar, And Computation, Safi Shams Muhtasimul Hoque
Circularly-Shifted Chirps For Triple Functionality: Communications, Radar, And Computation, Safi Shams Muhtasimul Hoque
Theses and Dissertations
This dissertation presents circularly-shifted chirps (CSCs), synthesized within orthogonal frequency domain multiplexing (OFDM) framework, as a novel solution for integrating radar, communication, and computation functionalities to a wireless network. Firstly, {index modulation (IM)} with circularly-shifted chirps (CSCs) (CSC-IM) for dual-function radar and communication (DFRC) system is discussed. The proposed scheme encodes the information bits with the CSC indices and the phase-shift keying (PSK) symbols. It allows the receiver to exploit the frequency selectivity naturally in fading channels by combining IM and wideband CSCs. It also leverages the fact that a CSC is a constant-envelope signal to achieve a controllable peak-to-mean …
Underwater Robot Path Planning In An Intermittent Communication System, Hunter Gallant
Underwater Robot Path Planning In An Intermittent Communication System, Hunter Gallant
Dartmouth College Master’s Theses
Sunflower, a novel cross-medium localization system between an aerial drone and an underwater robot, has not yet been implemented in a multi-robot exploration system. This project’s aim was to simulate various configurations of multi-robot systems, and to create an algorithm, called AdjustPath, to improve exploration and avoid inter- robot collisions. With three, five, seven, and ten simulated underwater robots, there was significant improvement when the AdjustPath algorithm was used. Knowing this, future hardware using the Sunflower system could use this proposed algorithm to increase efficiency and avoid more collisions.
Cubicom: Noisy Office Environment Communication Device, Nicholas Alan Maley, Joshua Michael Heeren, Alejandro Peña
Cubicom: Noisy Office Environment Communication Device, Nicholas Alan Maley, Joshua Michael Heeren, Alejandro Peña
Electrical Engineering
The CubiCom is a system that enables secure and clear communication between users in a noisy office space. It can function in any small cubicle within a 12 foot radius. The system consists of a series of wireless headsets for 6 users to transmit and receive audio, and a communication box that facilitates this process. These headsets are noise-dampening, preventing ambient sounds from interrupting conversation and making sure that all parties can hear each other clearly. Line-of-sight (L.O.S.) with each headset is required to have proper communication between users. This feature ensures no one outside of the room can eavesdrop, …