Rice University

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Thesis Defense

Graduate and Postdoctoral Studies
Electrical and Computer Engineering

Speaker: Himanshu Aggrawal
Masters Candidate

High-speed ADC for enabling Ultra-wideband Pulse-based Directional Modulation for Communication & Localization.

Tuesday, April 22, 2014
10:30 AM  to 11:30 AM

2014  George R. Brown Hall

Abstract: Conventional wireless communication links consist of a transmitter and a receiver whose directivity is predominately defined by the radiation pattern of the antenna. Problem of security in such conventional systems arises due to the wide pattern beam width of the transmitting antennas. Any sensitive receiver, even the ones outside the main lobe of the radiation, can receive and decode the information making the system spatially insecure. A broadband time-domain pulse-based directional antenna modulation architecture is introduced which can substantially increase the security of the wireless communication. Moreover, we propose a technique for improving the accuracy of localization and the resolution of imaging radars using a time-domain pulse-based directional modulation. Finally, a novel architecture for an ADC is implemented to increase the performance using active cancellation which can be used for on-chip pulse based receivers.

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