This research evaluates the Distributed Antenna Systems (DAS) introduced delays and their effects on the indoor channel in simulcast situations where the effect of delays is most prevalent. Different simulcast cases that form the basic building blocks are analyzed to form an understanding of the problem. Two case studies of important indoor environments are presented. Importance of improving ray tracing simulations to include propagation and DAS delays is highlighted.
The paper also introduces a DAS element representation and delay mapping model and explores techniques of engineering DAS delays to optimize location estimation by ranging and RF fingerprinting to achieve E911 mandated accuracy.
A brief description is introduced for a Software Defined Radio (SDR) implementation of a Correlation Channel Sounder and the possible application of channel sounding for indoor DAS. The paper suggests procedures to produce a full DAS delay profile and ways to optimize it for location estimation.
Library of Congress Subject Headings
Indoor positioning system (Wireless localization); Wireless communication systems; Ray tracing algorithms; Antenna arrays
Electrical Engineering (MS)
Department, Program, or Center
Electrical Engineering (KGCOE)
Ibrahim, Ahmed Sallam Mohamed, "A Study of DAS delays and their Impact on the Wireless Channels with Application to Indoor Localization" (2015). Thesis. Rochester Institute of Technology. Accessed from